Yield potential of maize hybrids under intensive inputs managements.

摘要

A study was conducted in Peshawar, Pakistan in the kharif season of 2003 to evaluate the yield potential of maize hybrids (Pioneer-3025, Monsanto-974 and Rafhan-3304) under intensive input management. Plant densities were 60 000, 80 000 and 100 000 plants/ha, and N levels were 180, 240 and 300 kg/ha. Monsanto-974 showed the maximum height (170 cm), stalk yield (8.4 t/ha) and grain yield (4696 kg/ha), while Rafhan-3304 showed the lowest grain yield and highest ear barenness (17%). Grain and stalk yields increased with increasing plant density and N rate. Percentage ear barenness increased with plant density, but showed an inverse relationship with N level..