Crop productivity and nutrient use efficiency as affected by long-term fertilisation in North China Plain

文献类型： 外文期刊

第一作者： Wang, Yingchun

作者： Wang, Yingchun;Wang, Enli;Smith, Chris J.;Wang, Yingchun;Huang, Shaomin;Wang, Daolong;Ma, Yibing;Wang, Ligang

作者机构：

关键词： Soil nutrient balance;Nutrient demand;Wheat;Maize;Modelling;Nitrogen;Phosphorus

期刊名称：NUTRIENT CYCLING IN AGROECOSYSTEMS （ 影响因子：3.27； 五年影响因子：3.767 ）

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年卷期：

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收录情况： SCI

摘要： Nutrient inputs into crop production systems through fertilisation have come under increased scrutiny in recent years because of reduced nutrient use efficiency and increased environmental impact. Fifteen years of experimental data on dynamics of N, P and K in soil, crop yield and nutrient uptake from nine fertilisation treatments at Zhengzhou, North China Plain, were used to analyse the contribution of different fertilisation treatments to crop yield, nutrient use efficiency and accumulation of nutrients in soil. The results showed that both N and P were limiting factors for crop growth. Without additional N and P fertilisation, only a very low yield level (ca 2 t ha(-1) for wheat and 3 t ha(-1) for maize) could be maintained. To achieve the potential productivity (i.e. yield level free of water and nutrient stresses) of wheat (6.9 t ha(-1)) and maize (8.3 t ha(-1)), wheat would need, on average, 170 kg N ha(-1), 32 kg P ha(-1) and 130 kg K ha(-1), while maize would need 189 kg N ha(-1), 34 kg P ha(-1) and 212 kg K ha(-1). The N and P demands correspond well to the N and P levels supplied in one of the fertilisation treatments (NPK), while K deficiency could occur in the future if no crop residues were returned or no extra K was applied. On average under this NPK treatment, 80% of N and 71% of P could be recovered by the wheat-maize system. Treatments with nutrient inputs higher than the NPK treatment and treatments without combination of N and P have led to accumulation of N and P in the soil profile. The input levels of N and P in the NPK treatment are recommended in fertiliser management, with additional K to avoid future soil K deficiency.

分类号： TQ44

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