الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 77 |  |  |
| | | from | 77 | | |
Abstract
SlM&\RY
The following lines sumnarize the various topics
which were handled in the present investigation to evaluate
the individual effect of algal andlor bacterial inoculation
solely or in combination with different levels of urea- N
as mineral fertilizer.
The method of introducing this surrmary follows to
great extent the line of approach used in the presentation
of the various topics dealt with in this dissertation:
1- §!!~!-2!_!!i!!_!~~L~!_~!£!~!!!1_i~~~!!112~~~~!1!!i!!_Ii!!~-.!.
It was noticed that, the bio -fertilizer treatments
in absence of urea-N gave insignificant effect on rice grain
yield in the expe r iment ·under study •. ~lS0 the addition of
bio-fertilizer in the presence of urea-N at the rate of 20
and 40 kg NI fed. did not give any signifi~ant increase in
rice gra in y ie 1d. However. OJ t was not teed tha t i noeu la t i fig
the rice plants with mixture of imported algal strain and
!!!!!2i!il!~ in presence of 40 kg NI fed. gave an increase in
rice grain yield.
Also, the inoculation with local and Imp oet ed algal
strains combined with Aaoseiril hm in the presence of 40 kg Z::: •• -~LlQ&&--
NI fed. gave an increase in rice grain yield comparing with
the eontro) treatment.
- 53 -
2. §!!~£.!_2.!-.!!,g!1-!E.2L2!_~!!£.!~!1!!_i!!2£!!.!i~.~!!.-!2!L!QQ.Q=
g!!!.!.!}!_~~ij~!_’:’
The present data showed that insignificant effect
were obtained with different treatments on the weight of
1000- rice grains, whatever, with bio-fertilizar and! or
added urea nitrogen.
The local algal strain BGA(l) caused a relative increase
in 1000- grains weight i.e. 22.95 g as compared with
~£.!ei!.l!!!!!Ilor with the imported algal strain BGA(2)·
The increasing level of urea-N from 20 to 40 kg N/
fed. lead to decrease in 1000-grains weight. Such decrease
amounted from 21.96 g to 21.39 g, respectively.
3. ~!!~!~!-!!K!!_!!gL~L~~!!!..!.!!_i~.5:E.!..!!io!!-2!L.Q!.I
!!!i~!_£!-!h22.!.!-l
The inoculation with algae and/or bacteria without
nitrogen fertilizer had a nega t ive effect on dry weight of
shoots before harvesting stage~ However, the high yield of
dry weight” of Shoots was observed in the treatment of imported
alga lstra in BGA( 2) combined with ~2!2.!.!..!!~·
The addition of urea-N at 20 and 40 kg HI fed. alone
gave a high significant increase in dry weight of shoots
Such increase amount 26.98 %and 28.25 % at 20 and 40 kg Nt
fed. respectjvely.
- 54 -
Ort the other handt the addition of urea- Nand biofertilizer
gave insignificant effect on dry weight of shoots.
4. §!!~!~_!lg!!_!~~L2!_~!£1~!i!!_1~22~!!jl2~~2Q_!b~-
!21!!_Ql~!2g~~_£2Q!~Qj~!-!i£~_g!~lQ!-l
The application of bio-fertilizer alone without mine--
ra 1 nit r0gen inc re as ed s ig n if ica n tl y the to tIi 1 nit r0g enco Ittent
of ~ice grains. The highest increase was (18.79 %) over
the control treatment ”without any addition” in the treatment
Which received the bio-inoculation of imported algal strain
combined with ~~2!~i!i!!~~(BGA(2) + Azo.) •
On the other hand, the application of 20 and 40 kg
NI fed. led to a highly significant increase in the total
nitrogen content of rice grains. The highest increas~ (58.11%)
over the control was in the treatment at 40 kg NI fed. while,
the interaction between bio-fertilizer and urea~ N shOwed no
significant effect on the total nitrogen content of rice
grains.
5. !;.!.!!c!.J!!....!!B.!!_!!!~l2r b!c!!!l:!Lin~S!!!!~!!~_.!!!~-.!~l!!
~!!~5!!!!dr!!!!_~~~ of.l:~!....I!!i!!.!-1.
Generally, the results indicated that the inoculation
with local algal strain or local and imported combined with
AZ~2i!:ill!!IE gave the highest increase (18.35 %), (23.7 ss) in
the total carbohydrates content of rice grain over the control
- 55 -
treatment If without any addition, respectively”.
On the other hand, the application of 20 kg NI fed.
gave a 51 ight increase in some treatments such as the treatment
which received ~!:.2!El.!l.!l.!:!!!’ and the treatment which
received two algal strains combined with ~!~!21!1!!.!:!~.Also,
the add i t ion 0 f 40 kg NI fed. ga v e a s Ii ghtin c r ea s e , but
the treatments which inoculated with BGA(2) alone and
BGA(l) + Azo.) gave a less value as compared wi th the contr
0 I t rea trne nt •
6. lH,!2~.!~! -!!E!l_!!!~L.2!_~!~!~!l-!l!!!~E~l!.i!on _.£J!!_!!!~_
e~!~~E~!g~-.2!~l~~_!~l~!~!-!l~~_&!!in~~
It is clear from the data that the application of 20
kg N/ fed. combined with the inoculation with a mixture of
local and imported algal strains combined with ~!~!el!i!!.!:!~
gave an increase in the percentage ot some essential and non
essential amino acids of rice grains in the experiment under
study as compared wi t h the appli ca t i on ot 40 kg NI fed. and
the same i nOC u Ia t i on .
Some essential amino acids such as leucine, lysine,
methionine and valine gave an increase in the treatment of
applying 20 kg N/ fed. combined with two algal strains and
AZ.2!Eirl!l~ as compared with the treatment which received
40 kg IN/ fed. and the same mixture of bi a-fer t i Ii zer.
---- ------------------------- -------