席草施肥效益寻优初探  

A Preliminary Exploration of Seeking Fertillzer Benefit Optimums on Rush(Juncus effusus L)

作　　者：李方敏[1] 周治安[1] 曾庆军[1] 李才学 田洪良 

机构地区：[1]湖北农学院,湖北省国营小港农场

出　　处：《湖北农学院学报》1994年第2期39-44,共6页Journal of Hubei Agricultural College

基　　金：湖北省科委;荆州地区科委四湖开发基金

摘　　要：本文模拟分析了席草三元二次饱和Ｄ－最优试验设计建立的施肥利润与施肥量的回归方程。结果显示：获纯收入２７００元·ｈｍ￣（－２）以上的优化肥料配方为：Ｎ２７２．１６～３３１．７４ｋｇ·ｈｍ￣（－２），Ｐ＿２Ｏ＿５１６５．０８～１９１．３３ｋｇｈｍ￣（－２），Ｋ＿２Ｏ３８６．５９～４７１．０４ｋｇ·ｈｍ￣（－２）；模拟氨磷钾单施和配施对施肥利润的影响顺序为：ＮＰＫ＞ＮＫ＞ＮＰ＝Ｎ＞ＰＫ＞Ｋ＞Ｐ，ＮＰＫ和ＮＫ配施是席草经济合理施肥的主要方案。It was simulate analysed that was found regression equation beween fertilizer profits and fertiliz-er rations using three factors square saturation D-optimum experiment design of rush in this paper.The resultsshowed that the optimum fertilizer rations were: N 272.16～331. 74kg·hm-2, P2O5 1 65.08～191. 33 kg·hm-2 and K2O 386.59～471.04 kg·hm-2, which were achived ptlre income above 2 700 yuan·hm-2; that the or-der in effects of simulate single and mixed applications nitrogen, phosphorus and potassium on fertilizer profits are:NPK>NK>NP=N>PK>K>P The mixed applications NPK and NK are main schemes of economical and ade-quate fertilization.

关 键 词：席草 施肥 施肥量 回归方程 

分 类 号：S564.406.2[农业科学—作物学]