大方县小麦密度及施肥参数研究

Research on close planting and fertilizing constant for wheat in Dafang area.

采用五因素二次正交旋转组合设计，应用中心变换的统计方法，研究了大方地区小麦不同种植密度和施肥量对产量和蛋白质含量的影响，结果表明，在合理密植、施用氮肥、磷肥、腐殖酸肥的基础上，施用钾肥是提高小麦产量的关键。钾肥与小麦产量关系极显著，呈现开口向上的抛物线，说明土壤缺钾严重。同时，在保证产量的基础上，增施氮肥、磷肥能显著提高小麦的蛋白质含量。试验得到产量大于２００ｋｇ／６６７ｍ２和蛋白质含量大于１４％的９５％置信区间的种植密度和施肥参数。

This paper reported a field experiment of different close planting and fertilizers for wheat in Dafang area so as to obtain rational close planting and fertilizing constant about ninety five per cent confidence interval of applied agricultural measure, that yield of wheat was more than 200 kg/667m 2 and protein content more than 14%.This orthogonal revolving design has incorporated five factors and variable souare and used statistical methods of central variation .The results showed that inorganic-K is key to increase yield of wheat, which use urea-N, inorganic-P and humic acid. It is extremely significant correlation between yield of wheat and inorganic-K, so as to obtain curve, which variable squered is plus value. This indicated that the soil was lack of inorganic-K seriously. In the meantime urea-N, inorganic-P can increase protein content which can increase yield of wheat as well.