Response of maize crop to early and late summer sowing conditions
2000
Singh, S. | Singh, T.N. (Narendra Dev University of Agriculture and Technology,Faizabad (India). Department of Crop Physiology)
The comparative effects of early and late summer sowing on leaf rolling, leaf water potential, plant growth, foliage and cob development and grain yield were studied. Plant growth and foliage development were more inihibited in the late-summer crop. The reductions in leaf area were accountable to the inhibition of individual leaf expansion due to atmospheric desiccation and high temperatures. At inflorescence stage, leaf (1.3%), tassel leaf (16.6%) and silk desiccation (2%) increased on account of soil and atmospheric desiccations particularly in late-summer crop. Soil moisture stress accompanied by high temperatures resulted in increased cob abnormalities leading to phenomenonal reduction (33%) in grain yield. Thus, soil moisture stress and high temperatures accompanied by hot winds during late summer impaired physical quality of cobs and proved detrimental to corn production. The overall performance and yield of early-summer crop was much better (4452 kg/ha) than that of late-summer crop (2981 kg/ha). The practical implications of these findings for summer maize production and its management have been discussed
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