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Potassium Fertilization on Maize under Different Production Practices in the North China Plain

文献类型： 外文期刊

作者： Niu, Junfang 2 ; Zhang, Weifeng 1 ; Chen, Xinping 1 ; Li, Chunjian 1 ; Zhang, Fusuo 1 ; Jiang, Lihua 3 ; Liu, Zhaohui; 1 ;

作者机构： 1.China Agr Univ, Dep Plant Nutr, Beijing 100193, Peoples R China

2.Chinese Acad Sci, Key Lab Agr Water Resources, Ctr Agr Resources Res, Inst Genet & Dev Biol, Shijiazhuang 050021, Peoples R China

3.Shandong Acad Agr Sci, Soil & Fertilizer Inst, Jinan 250100, Peoples R China

4.Hebei Agr Univ, Coll Agron, Baoding 071001, Peoples R China

5.Int Potash Inst, CH-8810 Horgen, Switzerland

关键词： potassium: 7440-09-7;agrichemical;fertilizer;soil fertility;yield response;recovery efficiency;economic profit;production practice

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

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收录情况： SCI

摘要： Potassium fertilization is uncommon in the North China Plain (NCP), especially in maize (Zea mays L.) production. Our specific objectives in this study were to determine yield response to K fertilization as affected by conventional as well as high-yielding production practices. Seven field experiments were conducted in the NCP. The factorial study compared three levels of K fertilization (K0 = no K; K1 = medium K rate; K2 = high K rate) and two levels of production practices: conventional (CP) and high yielding (HP). At all sites, HP outperformed CP in terms of maize grain yield except at ZD in 2006. On average, maize grain yields were enhanced by 9.9 and 14.9% under CP and 15.7 and 21.0% under HP at the K1 and K2 levels, respectively. Maize yield response, as well as economic profit from applied K, were greater under HP than CP, on average, across seven site-years. Medium K inputs improved partial factor productivity (PFP) of applied N and P, while higher rates had inconsistent results. Overall, PFP and agronomic efficiency of applied K were improved under HP, as was the apparent recovery efficiency of applied K, which suggests positive interactions among K and other high-yielding production practices. Negative K balances were observed in all of the K0 and K1 treatments in both years and under both production practices, especially under HP. In intensive agricultural soils of the NCP with higher K content relative to South China, optimal K fertilization will improve soil fertility and support high grain yield.

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