豫薯10号优化栽培数学模型的研究

A Study on Mathematical Model for Optimum Cultivation of Yushu 10

采用５因子二次正交旋转设计，研究了播期、密度、氮肥、磷肥、钾肥５因素对豫薯１０号产量的影响，建立并分析了产量对５因素的函数模型。结果表明，５因素对产量的影响大小依次为播期＞氮肥＞磷肥＞钾肥＞密度。欲达到１８万ｋｇ／ｈｍ２以上的产量，最佳播期为６月２３日，在本试验条件下不施氮肥，磷肥施用量７５．０９７５ｋｇ／ｈｍ２，钾肥２４９３８４ｋｇ／ｈｍ２，密度为４９２９０５９１４５株／ｈｍ２。

The quadratic orthogonal rotation design with 5 factors was used to study the effect of seeding date,density,N fertilizer,P fertilizer and K fertilizer on the yield of Yushu 10,and to establish the function model with yield to 5 factors The analysis on this model shows that the order of the effect of 5 factors on yields is as follows:seeding date >N fertilizer>P fertilizer>K fertilizer>density In this test,for getting the yield of over 180t/hm 2,the optimun seeding date is July 23,the appropriate density 49290-59145 plants/hm 2,the applying amount of P fertilizer 75.0-97 5 kg/hm 2,and K fertilizer 249-384 kg/hm 2,if applying no N fertilizers