Simulating nutrient stress effects on phenological development in maize
2000
Singh, U. | Wilkens, P.W. (International Fertilizer Development Center, Alabama (USA))
Crop growth simulation models for maize reliably predict effects of temperature and photoperiod on crop duration, a major determinant of yield. But they usually ignore possible effects of extreme high/low temperatures, drought stress, or nutrient deficiencies on duration. Drought stress and nitrogen and phosphorus deficiencies during the vegetative phase can delay tassel initiation and silking. Similarly, stresses during ripening can cause early senescence and maturity. Thus, harvest management, yield forecasting, and planting of the subsequent crop can be affected. The performance of a modified maize model that simulates the effect of N deficiency on phyllochron and phenological stages is described and compared with actual data from maize trials in Nigeria, Hawaii, and Florida
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