Effect of Various Levels of Nitrogen, Phosphorus and Potassium (NPK) on Growth, Yield and Yield Components of Sunflower

2000 ◽  
Vol 3 (2) ◽  
pp. 338-339 ◽  
Author(s):  
Syed Abdul Sadiq ◽  
Muhammad Shahid ◽  
Amanullah Jan ◽  
Syed Noor-Ud-Di
Keyword(s):  
Yield Components ◽  
Growth Yield ◽  
Yield And Yield Components ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

The influence of drought stress on growth, yield and yield components of selected maize genotypes

2003 ◽  
Vol 141 (1) ◽  
pp. 43-50 ◽  
Author(s):  
A. Y. KAMARA ◽  
A. MENKIR ◽  
B. BADU-APRAKU ◽  
O. IBIKUNLE
Keyword(s):  
Grain Yield ◽  
Water Deficit ◽  
Yield Components ◽  
Central Africa ◽  
Growth Yield ◽  
Drought Tolerant ◽  
Maize Genotypes ◽  
Yield And Yield Components ◽  
West And Central Africa ◽  
Savannah Zone

The risk of drought is high in the Sudan savannah zone of West and Central Africa because rainfall in this area is unpredictable in quantity and distribution. Thus, improved maize genotypes tolerant to drought could stabilize maize grain yield in this zone, where recurrent drought threatens grain production. Six maize genotypes, two each of hybrids, open-pollinated varieties (OPVs) and landraces, were evaluated for tolerance to terminal water deficit before flowering. Water deficit significantly reduced growth, grain yield and yield components of the maize genotypes. Significant differences were observed among genotypes for all the traits measured. One hybrid, 9011-30, and two improved OPVs, STR-EV-IWD and IYFD-C0, that showed tolerance to water stress recorded higher grain yield, and accumulated and partitioned more assimilates to the grain than the drought-susceptible genotypes. Also the drought-tolerant genotypes, 9011-30, STR-EV-IWD and IYFD-C0 had more ears/plant and greater numbers of kernels/ear. These genotypes could serve as sources of drought tolerance for the development and improvement of new drought-tolerant maize genotypes.

Sign in / Sign up

Export Citation Format

Share Document