Study on Site-specific Nutrient Management in Cotton Field |
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| Authors: | YANG Li-ping Jiang Cheng JIN Ji-yun ZHANG Feng-ming |
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| Institution: | 1. Key Laboratory of Plant Nutrition Research of Ministry of Agriculture, Soil and Fertilizer Institute of Chinese Academy of Agricultural Sciences, Beijing 100081
2. Handan Agricultural Technology Extension Station, Handan , Hebei Province 056802 |
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| Abstract: | The study on the characteristics of spatial variability of soil nutrients and fertilizer recommendations in cotton field under certain conditions of agricultural management was conducted with GIS and systematic approach for soil nutrient constrains. The results showed that of the spatial variability of soil nutrient was greatly related to the management condition of previous crops. Grid sampling and variable rate application technology (VRAT) were the tools that would hopefully increase fertilizer efficiency. The fertilizers were applied where they were needed and at proper rate. Balance fertilization demonstration showed that fertilizer recommendations according to the available nutrient level in soil could decrease fertilizer cost with 657.4 yuan / ha and increase seed cotton yield by 19.8%. A net profit of the balanced fertilization was 5314.9 yuan / ha higher than that of local fertilization practice. |
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| Keywords: | Cotton field Site-specific nutrient management GIS Fertilizer recommendations Variable rate fertilization |
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