基于均匀设计枇杷苗期氮磷钾施肥优化

Nitrogen Phosphorus and Potassium in Seeding Stage of Loquat Optimized Fertilization Based on the Uniform Design

摘要: 采用均匀设计方案对枇杷苗期氮磷钾施肥量进行了初步优化，建立了施肥量对枇杷苗期叶绿素含量增量的数学回归模型：Y = 62.1 − X1*3.68 − X2*1.86 − X3*3 + X2*X3*0.15 + X1*X1*0.12 + X3*X3*0.05，明确了氮磷钾单因素及因素交互效应，通过频数分析确定出枇杷苗期适宜的施肥量范围为尿素3~5.52 g、过磷酸钙3~13.37 g、硫酸钾3~6.23 g，适宜的氮磷钾元素比例为1:0.26~0.63:1.13~1.23。

Abstract: The uniform design was used to optimize the amount of nitrogen, phosphorus and potassium fertilization in Loquat seedling stage. A mathematical regression model of chlorophyll content increment in seedlings stage of Loquat was established: y = 62.1 − x1*3.68 − x2*1.86 − x3*3 + x2*X3*0.15 + X1*X1*0.12 + X3*X3*0.05. The single factor and factor interaction effects of nitrogen, phosphorus and potassium were determined. Through frequency analysis, the suitable range of optimized fertilization in Loquat seedling stage was urea 3~5.52 g, superphosphate 3~13.37 g, potassium sulfate 3~6.23 g. The optimum ratio of N, P and K is 1:0.26~0.63:1.13~1.23.