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- W2391145055 abstract "【Objective】The effects of inorganic N content in soil on the N rate for obtaining maximum yield, N utilization rate and the relation of cabbage yield and quality with N rate in spring cabbage-corn-winter cabbage rotation system were conducted. 【Method】Field location experiments were carried out to study the changes of crop yield, N utilization rate, water-soluble sugar content, Vc content and nitrate content in different inorganic-N content soils after application of 0, 90, 180, 270, 360, 450 kg·ha-1 N. 【Result】Inorganic N content in the soil could influence the maximum N fertilizer rate for obtaining maximum yield of spring cabbage significantly. The result indicated that the changes of soil inorganic N only affect N fertilizer application rate during the growing season. When the N fertilizer rate was 1.8-3.2 times of the N fertilizer rate for obtaining the maximum cabbage yield, the excess applied N rate has caused NO3--N enrichment in the ground water. The N rate and inorganic N content in soil can affect the N utilization rate of cabbage, the cabbage-corn rotation system is good for enhancement of N utilization rate. When the N rate was at 90 kg·ha-1, high-yield of cabbage and best-quality were obtained simultaneously.【Conclusion】Inorganic N content in soil effects the maximum N rate and the N utilization rate remarkably. The N fertilizer after-effect of Saijiang black soil is obvious, cabbage-corn crop rotation can raise N utilization rate. The N rate influences cabbage yield and the quality. In order to obtain better quality, N rate must be reduced." @default.
- W2391145055 created "2016-06-24" @default.
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- W2391145055 date "2007-01-01" @default.
- W2391145055 modified "2023-09-23" @default.
- W2391145055 title "Study on the Effect of Different Nitrogen Rates in Spring Cabbage-Maize-Winter Cabbage Rotation System" @default.
- W2391145055 hasPublicationYear "2007" @default.
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