الفهرس 
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Abstract
The experimental design was a split – split plot with three replications.Harvesting ages randomly distributed to main plot, thevarietieswere assigned as sub-plot and the three phosphorus fertilization levels were allocated as sub-sub-plots. Each plot contains five ridges, with seven meters in length and one meter in width.
Sugarcane varieties were planted in mid-March with the dry method, and the field was irrigated right after planting and all other agronomic practices were carried out as recommended under Aswan region conditions. Plant cane was allowed to ratoon. Harvest took place 10, 11, 12 months after planting or harvesting date.
The optainet results could be summarized as follows:
1.Effect of phosphorus fertilization levels as well as their interaction on growth characters sugar cane varieties.
1-Number of stalks/m2.
The results showed that the number of plants per square meter was significantly affected by cultivars in both seasons except at 180 days in the first season. The varieties gave the highest values at 150 days in the type Giza 54-9 in the first season and at 90 days in the type Giza 2003-47 in the second season.
The results obtained the level of phosphate fertilization and raised these results in the characteristic at 90, 120, 150 and 180 days of planting in the first and second season. Obtaining the highest values of phosphate fertilization significantly affected the number of plants / m2 at 150 days and the level of 45 kg of phosphate fertilization in the first season and at 90 days and the level of 45 kg of phosphate fertilization in the second season.
The number of plants / m2 was significantly affected by the interaction between the varieties and the levels of phosphate fertilization at 90, 120, 150 and 180 days in the first and second seasons. The reaction achieved the highest values at 45 kg of phosphate fertilization with the variety Giza 2003-47 at 90 days of Farming.
2-stalk length(cm).
Stalk length was significantly affected by cultivars in both seasons. The variety Giza 2004-27 gave the highest values at 180, 240 days in the first season, and the Giza 9-45 variety at 120 and 180, 240 days in the second season.
The phosphate fertilizer levels showed a significant effect on this trait at 120, 180, 240 days of planting in the first and second seasons. The highest value was obtained when increasing phosphate fertilization. Stalk length increased at 60 kg Phosphate fertilization / fad. in both seasons.
Stalk length was significantly affected by the interaction between varieties and levels of phosphate fertilization at the age of 120, 180 and 240 days after planting in the first and second seasons. The reaction achieved the highest values of 60 kg of phosphate fertilizer / fad. in the type Giza 2004-27 in the first season and Giza 54-9 in the second season.
3-stalk diameter (cm).
The country was significantly affected by varieties at the age of 180 days in the first season and 180 days in the first season and 240 days in the second season. It gave the highest value at 240 days in the variety Giza 9-45.
The levels of phosphate fertilizer showed a significant effect on the stalk diameter at 120 and 240 days in both seasons. The highest value of phosphate fertilization was 45 kg super phosphate at the age of 120 days from planting.
The interaction between the varieties and the levels of phosphate fertilization at 120 and 180 days of farming showed a significant effect in both seasons and in the second season at 240 days, as it gave the highest value at the level of 60 kg superphosphate / fad. at120 days.
4-Brix- Total soluble solids (T.S.S.%).
The percentage of solids in the cultivars was significantly affected in both seasons at the age of 180, 210, 240 and 270 days. The highest value was given at the age of 240 and 270 days in the cultivar Giza. 2003-47.
The levels of phosphate fertilizer significantly affected the percentage of solids in both seasons at the age of 270 and in the first season at 180, 210 and 240 days. The highest value was given at the age of 270 days at the level of 30 kg super phosphate / fad.
The interaction between the cultivars and the levels of phosphate fertilizer at 180, 210, 240, 270 days showed a significant effect on the percentage of solids in both seasons. The variety Giza 2003-47 gave the highest value in the second season at the age of 210 days, where the highest percentage of substances could be obtained. Total soluble solid when adding 45 kg superphosphate / fad. The variety Giza 2003-47 gave the highest value in the second season at the age of 240, 270 days, the highest percentage of total soluble solids were obtained when adding 30 kg superphosphate / fad.
2. Effect of harvest time and phosphorus fertilization levels as well as their interaction on yield and its component on growth characters on sugar cane varieties:
1- Number of millable cane/m2.
The results showed that the number of plants was significantly affected by cultivars in both seasons. The highest value was achieved for one varietyG. T. 54-9 in the first season. and G. 2004-27 in the second season.
The levels of phosphate fertilizer significantly affected the number of plants /m2 in the two seasons, and an addition was achieved 60 kg P2O5 / fad. The highest value in the number of plants in the first season and the level of 45 kg P2O5 in the second season.
2. stalk length.
The height of the plants was significantly affected by the time of harvest in the first season, and it gave its highest value at the time of harvest 11 months from planting.
The cultivars showed a significant effect on height in both seasons and achieved the highest value of leg length in the cultivar Giza 9-45 in the first and second season.
The length of the stem was significantly affected by the level of phosphate fertilization in the second season. The highest length was obtained at 45 kg phosphate acre in the second season.
The results showed that there was a significant effect in the interaction between the harvest time of the varieties in both seasons, and the results showed that the harvest time of 12 months of planting with the variety Giza 2004-27 gave the highest values in the first season and the variety Giza 9-45 in the second season along the stem.
The triple interaction between harvest dates, varieties and phosphate fertilization levels showed a significant effect on stem height in the first season. The highest value of stem length was obtained by increasing the harvest life at 12 months of cultivation in type G. T. 54-9 and fertilization level of 60 kg phosphate.
Stalk length was significantly affected between the varieties and the level of phosphate fertilization in both seasons, and it achieved the highest value at class G. 2004-27 and the level of fertilization of 30 kg phosphate / fad. in the first season, and the highest length at GT 54-9 and the level of 60 kg phosphate per acre in the second season .
The triple interaction between harvest time, cultivars, and phosphate fertilizer levels showed a significant effect on stem length in both seasons. The highest value of stem length was obtained by increasing the harvest time at 12 months of planting in the variety Giza 2004-27 at the fertilization level of 30 kg phosphate / fad. in both seasons.
3-stalk diameter (cm).
The harvest date showed a moral effect on the country in both seasons, and the highest value was achieved at the time of harvesting 12 months from planting in the first season. The harvest date of 11 months from planting achieved the highest value in the second season.
The cultivars showed a significant effect on the diameter in the second season, and it achieved the highest value in stem diameter in the variety Giza 9-45.
The level of phosphate fertilizer also showed a significant effect on the stem diameter in the first season, and it achieved the highest value at the level of 30, 60 kg superphosphate / fed.
The results showed that there was a significant effect on the interaction between harvest time and phosphate fertilization levels in both seasons in the country. The results showed that the harvest time of 12 months from planting and the variety Giza 2003-47 gave the highest value on the stem diameter in the first season. The harvest time is 12 months of planting, and the variety Giza 9-45 gave the highest value in the stem diameter in the second season.
The interaction between harvest time and the level of phosphate fertilization showed a significant effect on stem diameter in both seasons. The harvest time of 12 months of cultivation and the level of 30 kg phosphate gave the highest value in the first season on the stem and in the second season at the age of 12 months of planting and 60 kg superphosphate / fad.
The stem diameter was significantly affected by the interaction between the varieties and the level of phosphate fertilization in both seasons. The highest stem diameter was achieved at Giza 9-45 variety and at 30 kg phosphate per feddan in both seasons.
The triple interaction between harvest time, cultivars, and phosphate fertilization levels showed a significant effect on stem diameter in both seasons. The highest value of stem diameter was obtained by increasing the harvest time at 12 months of planting in Giza 47-2003 and at the level of fertilization of 30 kg phosphate / fad. At 12 months of planting in Giza 9-45, and at a fertilization level of 60 kg phosphate / fad.
4- single millable cane weight (Kg).
The results showed that the differences in the weight of the sticks between the time of harvest were significant in the first season at 12 months, and the harvest time of 12 months from planting achieved the highest weight of the sticks in the second season.
The cultivars showed a significant effect on the weight of the aid in the first and second seasons. The variety Giza 2004-27 achieved the highest value in sticks weight in the first season. The variety achieved Giza 9-45 in the second season.
The weight of the agar was significantly affected by the level of phosphate fertilization in the second season. The highest weight was obtained at 30 kg superphosphate / fad. in the second season.
The results showed a significant effect in the interaction between harvest time and varieties on the weight of the stick in the first season. The highest weight was given at the harvest time of 10 months of cultivation in the variety Giza 9-45.
The interaction between the harvest time and the level of phosphate fertilization showed a significant effect on the weight of the stick in both seasons. The highest weight was achieved at the 11 month harvest time of planting and at the fertilizer level of 45 kg superphosphate / fad. in the first season. The highest weight was achieved at the harvest time of 11 months from planting and at the level of fertilization of 30 kg of phosphate in the second season.
The weight of the stick was significantly affected by the interaction between the varieties and the level of phosphate fertilization in both seasons. The highest weight of the stick was achieved at the Giza 2004-27 variety and the level of 60 kg phosphate per fad in the first season. And at 30 kg with the Giza 9-45 variety in the second season.
The triple interaction between the reaction, harvest time, cultivars and phosphate fertilization levels showed a significant effect on the weight of the stick in both seasons. The highest value of the stick weight was obtained at the harvest time at 12 months of cultivation in the variety Giza 9-45 and the fertilizer level was 30 kg superphosphate / fad. The highest value of the stick weight was obtained at the time of harvest at 10 months of cultivation in the variety Giza 9-45 and the fertilization level was 30 kg superphosphate / fad.
5- Cane yield (Ton/fad.).
The reed crop was significantly affected by the harvest time in the first season. The 11-month harvest time of planting achieved the highest value in the first season.
The varieties showed a significant effect on the reed yield in the first and second seasons, and the Giza 2004-27 variety achieved the highest value in the reed yield in the first and second seasons.
The reed yield was significantly affected by the level of phosphate fertilization in the first season. The highest value was obtained at 60 kg superphosphate / fad. in the first season.
The results showed a significant effect on the reed yield in the interaction between the harvest time and the varieties in both seasons. The highest value was given to the cane crop at the harvest time of 11 months from planting in the variety Giza 2004-27 in the first season. The highest value was given to the reed crop at the time of harvesting 10 months of planting in the variety Giza 9-54 in the second season.
The interaction between harvest time and the level of phosphate fertilization showed a significant effect on the reed yield in both seasons. It achieved the highest value when it was harvested 11 months from planting and at the level of fertilizing 45 kg superphosphate / fad. in the first season. At the time of harvesting 11 months from planting, and at the level of fertilizing 30 kg superphosphate / fad. in the second season.
The interaction between the cultivars and the levels of phosphate fertilization showed a significant effect on the cane yield in both seasons. The highest value of reed yield was obtained in the type Giza 2004-27and Giza 9-45 and at the level of fertilization of 60 kg superphosphate / fad. in the first season and the variety Giza 9-45 and at the level of fertilization of 30 kg superphosphate / fad. in the second season.
The triple interaction between harvest time, cultivars, and phosphate fertilization levels showed a significant effect on cane yield in both seasons. The highest value of the cane crop was obtained at the harvest time at 11 months of planting in the type Giza 45-9 and at the fertilization level of 45 kg superphosphate / fad. in the first season. At the age of harvest at 10 months of planting in the type Giza 45-9, and the level of fertilization is 30 kg superphosphate / fad. for the second season.
6- Sugar yield (Tons/fad.).
The results showed that the sugar crop was significantly affected by the harvest time in both seasons. The 12-month harvest time of planting achieved the highest values in both seasons.
The varieties showed a significant effect on the sugar crop in the first and second seasons. The variety Giza 2004-27 achieved the highest value in the sugar crop in the first season and the type Giza 45-9 in the second season.
The sugar yield was significantly affected by the level of phosphate fertilization in both seasons. The highest value was obtained at 60 kg phosphate / fad. in both seasons.
The results showed a significant effect on the sugar yield in the interaction between the harvest time and the varieties in both seasons. The highest value was given to the sugar crop at the harvest time of 12 months from cultivation in the variety Giza 45-9 in the first season, it gave the highest value on the sugar crop at the time of harvesting 12 months from cultivation in the variety Giza 2004-27 in the second season.
The interaction between harvest time and the level of phosphate fertilization showed a significant effect on the sugar yield in both seasons. It achieved the highest value at the time of harvesting 12 months from planting and the level of fertilization of 60 kg of phosphate in both seasons.
The interaction between the cultivars and the levels of phosphate fertilization showed a significant effect on the sugar yield in both seasons. The highest value of sugar yield was obtained in the Giza 2004-27 variety, and the level of fertilization of 60 kg of phosphate was obtained in the first season. The highest value of sugar yield was obtained in the variety Giza 45-9 and the level of fertilization of 30 kg of phosphate in the second season.
The triple interaction between harvest time, cultivars, and phosphate fertilization levels showed a significant effect on sugar yield in both seasons. It was possible to obtain the highest value of the sugar crop at the time of harvest at 12 months of cultivation in the type Giza 45-9 and the level of fertilization of 60 kg phosphate in the first season. And at the harvest time at 11 months of planting in the type Giza 2004-27 and the level of fertilization of 30 kg of phosphate in the second season.
3. Effect of harvest time and phosphorus fertilization levels as well as their interaction on juice quality on sugar cane varieties:
1- Brix.
The results showed that there were significant differences in this characteristic between harvest dates in both seasons. The harvest time of 12 months of planting achieved the highest value in the first and second seasons.
The varieties showed a significant effect on brix in the first and second seasons. The variety Giza 2003-47 achieved the highest value on brix in the first season. And the variety Giza 45-9 in the second season.
Brix was significantly affected by the level of phosphate fertilization in both seasons. The highest value was obtained at the level of 60 kg phosphate per fad. in the first and second seasons.
The results showed a significant effect on brix in the interaction between harvest time and varieties in both seasons. The highest value of brix was at the time of harvest 12 months from planting in the variety Giza. 2003-47.
The interaction between harvest time and the level of phosphate fertilization showed a significant effect on brix in both seasons. It achieved the highest value at the time of harvesting 12 months from planting and the level of fertilizing 60 kg of phosphate in the first season. It achieved the highest value on brix at the time of harvesting 12 months from planting and the level of fertilization of 30 kg of phosphate in the second season.
Brix was significantly affected by the interaction between the varieties and the level of phosphate fertilization in both seasons. It achieved the highest value at the Giza 2003-47 variety and the level of 60 kg phosphate / fad. in both seasons.
The triple interaction between harvest time, cultivars, and phosphate fertilizer levels showed a significant effect on brix in both seasons. The highest value of brix was obtained at the time of harvest at 12 months of planting in the variety Giza 2003-47 and the level of fertilization was 60 kg of phosphate in both seasons.
2- Sucrose.
The results indicated a significant increase in the percentage of sucrose in both seasons. It also indicated that the harvest time of 12 months from sowing gave the highest values in the first and second seasons.
The cultivars showed a significant effect on the percentage of sucrose in the first and second seasons. The variety Giza 2003-47 achieved the highest value in the percentage of sucrose in the first and second seasons.
The percentage of sucrose was significantly affected by the level of phosphate fertilization in both seasons. The highest value was obtained at the level of 60 kg phosphate / fad. in the first and second seasons.
The results showed a significant effect of the trait in the interaction between harvest time and varieties in both seasons. The highest percentage value of sucrose was at the time of harvest 12 months from planting in the variety Giza 2003-47 in both seasons.
The interaction between harvest time and the level of phosphate fertilization showed a significant effect on the percentage of sucrose in both seasons. It achieved the highest value at the time of harvesting 12 months from planting and the level of fertilizing 60 kg of phosphate in the first season. The highest value of the recipe was achieved at the age of 12 months of cultivation and the level of fertilization of 30 kg of phosphate in the second season.
The percentage of sucrose was significantly affected between the varieties and the level of phosphate fertilization in both seasons. It achieved the highest value at Giza 2003 - 47 variety and the level of 60 kg phosphate / fad. in both seasons.
The triple interaction between harvest time, cultivars and levels of phosphate fertilization showed a significant effect on the percentage of sucrose in both seasons. The highest percentage value of sucrose was obtained at harvest age at 12 months of cultivation in Giza 2003-47 cultivar and the level of fertilization of 60 kg phosphate in the first season. The highest percentage value of sucrose was obtained at the time of harvest at 12 months of planting in the type Giza 2003-47 and the level of fertilization of 30 kg phosphate in the second season.
3-Purity.
The results indicated a significant increase in the percentage of purity in the second season. It also indicated that the harvest time of 12 months gave the highest values in the second season with the increase in harvest life, the percentage of purity was significantly increased in the second season.
The cultivars showed a significant effect on the percentage purity in the first and second seasons. Giza 2003-47 cultivar achieved the highest value in the percentage purity in the first and second seasons.
The percentage of purity was significantly affected by the level of phosphate fertilization in both seasons. The highest value was obtained at 60 kg phosphate / fad. in the first and second seasons.
The results showed a significant effect of the characteristic in the interaction between harvest time and varieties in both seasons. The highest percentage value of purity was at the time of harvest for 12 months of cultivation in the variety Giza 2003-47 in the first season. The highest value of the percentage of purity was at the time of harvesting 12 months from planting in The variety is Giza 45-9 in the second season.
The interaction between harvest time and the level of phosphate fertilization showed a significant effect on the percentage of purity in both seasons. It achieved the highest value at the age of 12 months harvest from planting and the level of fertilizing 45 kg of phosphate in the first season. At the age of harvest 12 months from planting and the level of fertilization of 60 kg phosphate in the second season.
The interaction between varieties and the level of phosphate fertilization showed a significant effect on the percentage of purity in both seasons. It achieved the highest value of the variety Giza 2003-47 and the level of fertilizing 60 kg of phosphate in the first season. And at Giza 2003-47, the level of fertilizing 60 kg of phosphate in the second season.
The triple interaction between harvest time, varieties, and phosphate fertilizer levels showed a significant effect on the purity percentage in both seasons. The highest purity percentage value was obtained at harvest age at 12 months of varieties in Giza 2003-47 variety and the level of fertilization of 45 kg phosphate in the first season. The highest value of the percentage of purity was obtained at the time of harvest at 12 months of planting in type G.T 45-9 and the level of fertilization of 45 kg phosphate in the second season.
4- Pol percentage.
The results indicated an increase in pol percentage in both seasons. It also indicated that the harvest time of 12 months gave the highest values in the first and second season.
The varieties showed a significant effect on pol percentage in the first and second seasons. The variety Giza 2003-47 achieved the highest value in sweetness in the first season, and the variety Giza 9-45 in the second season.
Pol percentage was significantly affected by the level of phosphate fertilization in both seasons. The highest value was obtained at 60 kg phosphate / fad. in the first and second seasons.
The results showed a significant effect of the trait in the interaction between harvest time and varieties in both seasons. The highest value of pol percentage was given at the time of harvest 12 months from planting in the variety Giza 2003-47. in both seasons.
The interaction between harvest time and the level of phosphate fertilization showed a significant effect on pol percentage in both seasons. It achieved the highest value at the time of harvesting 12 months from planting and the level of fertilizing 60 kg of phosphate in the first season. At the time of harvest 12 months from planting and the level of fertilizing 30 kg phosphate in the second season.
The interaction between cultivars and levels of phosphate fertilization showed a significant effect on pol percentage in both seasons. The highest value of sweetness was obtained for the variety Giza 2003-47 and the level of fertilization of 60 kg phosphate was obtained both seasons.
The triple interaction between harvest times, varieties and phosphate fertilization levels showed a significant effect on pol percentage in both seasons. The highest value of sweetness was obtained at the time of harvest at 12 months of planting in the type Giza 2003-47 and the level of fertilization of 60 kg phosphate in the first season, and at the time of harvest at 12 months of planting in the type Giza 2003-47 and the level of fertilization of 60 kg phosphate in the first season . And at the age of harvest at 12 months of planting in the type Giza 2003-47 and the level of fertilization of 30 kg phosphate in the first season.
5- Sugar recovery percentage.
The sugar recovery percentage was significantly affected by the harvest times in both seasons. He achieved a harvest time of 12 months, giving the highest values in the first season and the second season.
The varieties showed significant influence in the sugar recovery percentage in the first and second seasons, and variety G. 2003- 47 The highest value in Sugar recovery percentage in the first and second seasons.
The sugar recovery percentage was significantly affected by the level of phosphate fertilization in both seasons. The highest value was obtained at 60 kg phosphate / fad. in the first and second seasons.
The results showed a significant effect of the characteristic in the interaction between harvest age and varieties in both seasons. The highest sugar recovery percentage value was given at a harvest age of 12 months from Agriculture in variety G. 2003-47. In both seasons.
The interaction between harvest age and the level of phosphate fertilization showed a significant effect on the sugar recovery percentage in both seasons. It achieved the highest value at the age of 12 months of planting and the level of fertilization of 60 kg of phosphate in the first season, and at the age of 12 months of harvesting from planting, and the level of fertilization of 30 kg of phosphate in the second season.
The interaction between the varieties and the levels of phosphate fertilization showed a significant effect on the theoretical sugar yield in both seasons. The highest theoretical sugar yield value was obtained at Giza 2003-47 variety and the level of 60 kg phosphate fertilizer level for both seasons.
The triple interaction between harvest times, varieties and phosphate fertilization levels showed a significant effect on the theoretical sugar yield in both seasons. The highest value of sugar recovery percentage was obtained at harvest age at 12 months of Agriculture in variety G. 2003-47 and level of fertilization of 60 kg phosphate in first season, and at harvest age at 12 months of Agriculture in variety G. 2003- 47 and fertilization level 30 kg phosphate for the second season.