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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (27): 220-225.

所属专题： 农业气象

• 农学 农业基础科学 • 上一篇    下一篇

黄土半干旱区柴胡低耗高效优化施肥模式研究

武鹏慧 王玉庆 石凯   

  • 收稿日期:2011-05-30 修回日期:2011-07-25 出版日期:2011-10-25 发布日期:2011-10-25
  • 基金资助:

    国家自然科学基金项目“基于植物模拟的塑料连栋温室环境的设计与仿真”; 山西省科技基础平台建设项目;山西省科技攻关基金

The Study on the Optimization Models of High-yield and Low Consumption Fertilization for Bupeurum chinense DC. in Semi-arid Region of the Loess Plateau

  • Received:2011-05-30 Revised:2011-07-25 Online:2011-10-25 Published:2011-10-25

PDF (PC)

941

摘要：

为黄土半干旱区寻找柴胡栽培高效低耗施肥方案，采用二次通用旋转组合设计，通过田间实验建立了氮、磷、钾3种肥料与柴胡根产量的数学模型。结果表明，氮、磷、钾对于柴胡根产量的增产作用大小依次为：磷肥>钾肥>氮肥，其中在试验施肥范围内氮肥和磷肥存在最佳施肥量，而钾肥未达到最佳施肥量。磷肥和钾肥间存在互作效应，高产出现在高磷高钾情况下，最大产量可达700 kg/hm2。寻优结果表明，柴胡经济产量在600 kg/hm2以上，纯收入在22500元/hm2元以上，95%的置信区间下，优化施肥量为：尿素,150.90~209.14 kg/hm2；过磷酸钙，753.38~933.05 kg/hm2；硫酸钾，190.96~255.62 kg/hm2。氮磷钾施肥量与柴胡产量有紧密的联系；在黄土高原区，需施高钾已达到产量最高。

关键词: 格木, 格木, 生长, 目标树, 离散系数

Abstract:

In order to found the large-yield and low-consumption fertilization program to Bupeurum chinense DC in semi-arid region of the Loess Plateau, the mathematical model of nitrogen, phosphorus and potassium application code on root yield a of Bupeurum chinense DC. was established based on field experiment using second universal rotary combination design, in semi-arid region of the Loess Plateau. The results showed that the order of the effect of nitrogen, phosphorus and potassium on yield improvement was phosphorus>potassium>nitrogen. Nitrogen and phosphorus had optimal fertilization amounts within the scope of experiment while potassium was not. And the fertilizer interaction effects were existed. There was great interaction between phosphoru and potassium, high root yield which up to 700 kg/hm2 occurred in high phosphorus and potassium conditions. Optimization results showed that under these conditions which economic outputs was above 600 kg/hm2, net income was above 22500 yuan/hm2 , and 95%confidence region, the optimal fertilization amounts was: N 150.90-209.14 kg/hm2; P 753.38-933.05 kg/hm2; K 190.96-255.62 kg/hm2. Application quality of nitrogenous, phosphorus and potassium fertilizer are closely related with yield of Bupeurum chinense DC. It should be used high potassium to reach high root yield.