2004•Journal of Henan Vocation-technical Teachers CollegeRequires access
The Effects of soil fertility and Nitrogen Application Rate on Wheat Yield and Quality
Mingzhe Zhu
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Abstract
Three soil fertilities and three nitrogen application rates significantly affect yield and quality indices, i.e, protein, wet gluten sedimentation, and dough stability. The effects of nitrogen applications on yield increase are ordered as low soil fertility medium soil fertility high soil fertility. To gain the highest profit from nitrogen applications without reduction of wheat yield and quality indices, the best N application rate is 9～10kg/666.7 m~2 for high soil fertility (the basic yield is ca. 420kg/666.7 m~2),13～14kg/666.7 m~2 for medium soil fertility (the basic yield is ca. 300kg/666.7 m~2), and 17～18kg /666.7 m~2 for low soil fertility (the basic yield is ca. 180kg/666.7 m~2). In general, nitrogen is wasted and profit reduces significantly when N application rate is greater than 20kg/666.7 m~2.