EFFECT OF SOIL MOISTURE STRESS AND FOLIAR APPLICATION
OF ZINC ON SOME MAIZE VARIETIES
Il-Yield, yield components and chemical analysis
By
Hefni, E.M.H.*; El-Hosary, A.A.*; Salwau, M.I.M.* and El-Sabbagh, A.**
* Dept. of Agron.. Fac. Agric. Moshtohor. Zagazig Univ. Egypt.
** Dept. of Water Requirement. Agrie. Res. Station Sakha. Egypt
ABSTRACT
Three field experiments were carried out during 1988. 1989 and 1990
seasons at Sakha Agricultural Research Station. Kafr El-Sheikh Governorate
Egypt. The aim of this Investigation was to study the effect of water stress, sonic
maize cultivars and zinc sulphate as foliar application on yield, yield
components and chemical analysis in maize grains. The experimental design
was split-split plot with four replications. The results could be summarized as
follows:
The average values of plants carried more than one ear percentage. ear
length, ear diameter, ear weight, number of rows/ear. number of grains/row.
100-grain weight, grain yield per plant and per feddan significantly decreased by
increasing the depletion of available soil moisture up to 80% in combined
analysis. On the other hand, the percentage of late wilt disease significantly
increased by increasing the depletion of available moisture, irrigation after 40%
depletion in available water gave the lowest protein % and the highest protein
yieldlfeddan, oil % oil yieldlfeddan and zinc content in grains of maize. T.W.C
310 cultivar gave the highest values of the percentage of plants carried nore than
one ear, ear length. ear weight. number of grains/row. 100-grain weight, grain
yield per plant and per feddan. protein and oil yield/feddan and zinc content
when compared with the other cultiv ars. Giza 2 ciVtivar gave the highest
percentage of infection with late wilt disease than other cultivars. Whereas
Karnak cultivar gave the maximum ear diameter, number of rows/ear, protein
and oil percentage in grains of maize The mean values of ear length. ear weight.
100-grain weight. grain yield per plant and per feddan. straw yield. protein
yield, oil percentage and oil yieldlfeddan were increased when received 0.3%
zinc sulphate, but the other characters of yield components were not significantly
affected. The mean values of infection with late wilt disease percentage
significantly increased by increasing level of zinc sulphate up to () 6%.
The interaction between T W ( 110 with the application of 0.6% zinc
sulphate gave the highest nican values of 100-grain weight. grain yield per plant
and per feddan Also the interaction between irrigation after 40% depletion in
available water with T W C 110 and applying 0.6% zinc sulphate as foliar gave
the highest mean values of number of grains/row protein and oil vieldlfeddan
Significant positive correlation values were detected between grain vield/feddan |
