为了探索湘中双季稻区三要素施肥量 ,根据涟源市农田施肥量调查分析结果 ,采用三因素二次回归正交旋转组合设计 ,进行了双季杂交稻习惯性施肥田间试验 ,通过计算机分析 ,建立了双季杂交稻产量与三要素施肥量之间的一系列施肥数学模型 ,试图寻求本地区双季稻施肥的最佳施肥量方案 ,为湘中地区计算机模拟大田生产 ,指导农民施肥提供了理论依据 In order to explore the amount of three elements fertilizer in double cropping rice in Hunan Province, according to the results of investigation and analysis of farmland fertilization in Lianyuan City, a three-factor quadratic regression orthogonal rotation combination design was used to study the field fertilization experiment of double cropping hybrid rice by computer A series of fertilization mathematical models between the yield of double cropping rice and the three elements fertilization rate were established in order to seek the best fertilization plan for double cropping rice in the region and simulate the field production in the middle part of Hunan Province to guide farmers in fertilization Provided a theoretical basis