الفهرس | Only 14 pages are availabe for public view |
Abstract SUMMARY Two tield experiments were conduoted during 1979 and 1980 seasoDS in sl)uth Tahreer, to study’ the etfeot ot some micro - elements lmd plant dens 1ty on the growth and yield of peanuts{var. Giza 4). The so11 ”t the experiments was aan4 textured having \ a PH value ot 6.8 and 7.0 in 1979 and 1980 seasons,respeotively. Also,the so:L1 contained 2.6 , 3.4 and 0.068 ppm. in the first season and 0.3 • 0.1 and 0.012 ppm. in the seoond season trom. Zn , lin flond B respeotively. Each experl.ment included 24 treatments which were the ~omb1nation ot three distanoes between hills and eight treatmenta ot mioro - l!tlements. Distances between hills were I 10 , 20 and 30 om. and between ridges 60 om. in all oases. Micro - element treatments werea Zero (cont~)l) to.4~ znS04 (Zn) ,0.4% JlDS04·(lin) ,0.3% H)BOJ (E) ,0.4” ZDS04 + C).4~ KnS04 (Zn + lin) ,O.4~ ZDS04 + 0.3” H)BO) (Zn + B) ,0.4% MnS04+ 0.3~ ~BO, (lin + B) .O.4~ ZDS04+ 0.4% 1In- 804 + 0.)” B,B03 l(Zn + lin + B),as foliar application after 60 days from sowing. ft.. uper.l.mental d••1p •••• plit plot with tour repl1oati0D8. where tl18 three uatano •• be•••• hills were arran-’ gad in the ~1n plots aDd the n.b plots were •• signed to moro e1em8nt ’treatmentli. The sub p10t area 1ftUI 21.6 •.2 • - 72 - Results oould be ~Jmmar1zed as follow., l.Dry weight ot leaves as well a8 braneh•• /plant was dearea-, sed significantl.y by increasing plant densi tJ’. 1I10ro _ elementll showed significant e:tf’eot on dry weight of leave. and branches/plant ~ both seasons. B,e1ther alone or in different combinations showedfavourable ettect on dr1 we1&ht ot leaves as well aa branches/plant. 2. Increasing the elistance between hills decreased signifioantly plant height. 011 the other hand,the numberot branohes/plant was inversely cl,rrelated with plant dens1tJ:. B aDdlin e1ther alone or in oombiDation se. to have better ettect on plant height and numberof branche./plant ot peanut than the oontrol treatment. 3.Weight 0’1 100 pods as well as 100 seed .eight •• re great17 atfected by the spacing between’hills aDd were inversely 00- rrelated with the numberot plants/tad • ..l1l micro-element treatments were s1gDif1cant17 superior to oontrol treatment on lOO-pod we18ht as well as 100- •• ed weight. !reataeDts including JIll and B either alone or in combiDatlon were superior to the OOJltrol treatment 1J1 their effect on these charac’l;ezs. 4.The shelling petreentage 4eoreue4 w1.’thrideDing the diatanoe between hi1l. •• !rhe ocab1.mLt1mis between B aDdZn or lin were 81gD1”1oant17 IJUperi.or to- ueataeD.~. oon’ta:l.zJ1ng Zn + )In + B,-. )Ia.h. u4 oOl1b~l 1Jltheir eueot oa Delling peroentqe. _ 73_ 5.Increasing the ci1stance between hills caused significant increases in nwllber ot pods/plant. nero - elements bad significant efflict on number of pods/plant ot peanut. ~1Natment8 inCll1ding B 91ther alone or in combinations were superior to othlar mioro - elements. 6.Pod yield/fad. seems to have been direotly oorrelated with plant population. Increasing distanoe between hills from 10 to 20 or .30 om. deoreased the pod yield by 8 and 13 % in the first season and by 9 and 13 % in the seooDd season,respectively. As regards the effect of micro - e1ements on yield ot pods/tad.,all micro-element treatments ~aBsed the control treatment. B had better effect than lin &nd. Zn on 71.14 of pods/fad. 7.IncreasiDg plant population by deoreas1Dgdistance between hills increased the protein yield/tad. ,as well as protein percentage. Protein yield and protein percentage increased markedly as a result ot apply1xJ.gmicro - elements in sUJgle as •• 11 as in dift’erent oombinations. In general, B either alone or in ocab1Dat1on ~d better etteot on protein 11eld than other treatments. 8.!he oU percentage in peazmt seed was inversely oorrelated ” with plant population wh1l.e. the 011 71814111U1d1reotly 00- rrelated with plant dpa1tJ’. JI1.cro - 81_8%1ts a:ueoted 81gn1t1~t17 011 71eld as well as 011 percentage. B a1ther alone or in oOlllb1Dations was superior to treatments oontaining lin • Zn aDd. the oontrol. _ 74_ 9.Emptypod percentage was significantly 1n:t1uenoedto different extents by plant population. Inoreasing distance bet~ weenhills decreased emptypod percentage. Application of micro - elements deore«sed significantly percentage ot emptypods. lO.Immaturepod percentage was inversely oorrelated with spacing between plants. M1oro- elements showedsignificant efteot on percentage of immature pods. Treatments including B either alone or in combiDatioDSgave best results. 11.Inorea81Dg distance betweenhills decreased significantly percentage ot rotted pods• .’ Onthe other hand, mioro - elements application had no signifioant effeot on rotted pod percentage. l2.lIn and Zn concentration in peanut leave. 1noreased 81gD1fiaantly at the higher dens!ties. l).1In concentration in leaves was olearly’ ~:t.oted by lin application. The greatest value of lin (145 ppm.)was obtained by application ot’ lin alone 1’011011’84 bY’Zn + Jfn and lin + B treatments (121 and 92 ppm.) ,~resp.ct1ve17. Whereasthe lowest lin ooncentration ( 55 and 62 ppm.) was obtained :trom B and Zn treatments. 14.!he application of Zn in QGlbina:t1on with B or lin had better· effect than the application of Zn alone. . ---’- --~”------ ,,_. _ 75_ 15.A negative interaction was obtained in ”the absorption ot Kn and Zn. The opt1mwn levels ot Mnand Zn were about 121 ppm. tor Lfnand 84 ppm. for Zn. J4n I Zn ratio of 1.44 seemsto be satisfactory for the growth o’l peanut plants in this respeot. l6.The”interact1ons ( plant density X micro - elements) were not signifioant on all oharaoters studied. - --~-- -_ ... ~--_. ------ ------------------ |