EFFECTS OF SOWING DATE AND NITROGEN APPLICATION RATE ON WHEAT YIELD AND YIELD COMPONENT FACTOR IN JIANGHUAI PLAIN

摘要

Wheat is a staple crop worldwide, but yields may diminish as climate change causes increasingly unpredictable patterns of precipitation and soil nutrient availability. Farmers are thus challenged to maximize planting efficiency to increase yield, while also improving their resource use efficiency. In this study, sowing date and nitrogen uptake and planting density, and aspects of yield are assessed. The results show that proper and appropriate sowing is conducive to the coordination of the three elements of wheat production and can achieve high yield. The yield of wheat with the same fertilization amount increased with the increase of planting density, and the yield of wheat increased first and then decreased. There was a significant difference between different fertilization rates at the same density, and the yield of wheat treated with N2 was the highest.