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采用氮、磷、钾3个养分因子,每个因子分4个施用梯度,共14个处理的无重复不完全大田试验设计“3414”方案,对湖北省潜江市棉麦套种方式下的小麦施肥技术进行了田间试验,建立了江汉平原棉麦套种方式下小麦的施肥模型,并在此基础上,提出了区域棉麦套种区土壤养分丰缺指标与小麦氮、磷、钾施用量的修正值,推荐了合适的小麦施肥量为N 130～210 kg/hm2、P2O540～70 kg/hm2、钾K2O 40～60 kg/hm2。
Three nutrient factors of nitrogen, phosphorus and potassium were used, and each factor was divided into 4 application gradients. A total of 14 treatments were designed with “3414” Wheat fertilization technique was used to conduct a field experiment to establish the fertilization model of wheat in intercropping with wheat and wheat in the Jianghan Plain. On this basis, the indicators of soil nutrient abundance and deficiency were put forward, and the application rates of nitrogen, phosphorus and potassium in wheat The recommended values of wheat fertilization are N 130 ~ 210 kg / hm2, P2O540 ~ 70 kg / hm2 and potassium K2O 40 ~ 60 kg / hm2.