李建设,程智慧,刘菊莲,孙权.基于银川地区水质的空心菜营养液配方筛选研究[J].干旱地区农业研究,2008,(4):114~120
基于银川地区水质的空心菜营养液配方筛选研究
Optimization of nutritional ration for Ipomoea aquatica Forsk growth based on the water quality of Yinchuan plain
  
DOI:10.7606/j.issn.1000-7601.2008.04.22
中文关键词:  空心菜  水培  营养液配方  模型
英文关键词:Ipomoea aquatica Forsk  DFT  nutrient solution  model
基金项目:国家“十一五”科技支撑计划项目(2007BAD57B03)
作者单位
李建设 西北农林科技大学园艺学院,陕西 杨凌 712100宁夏大学农学院,宁夏 银川 750021 
程智慧 西北农林科技大学园艺学院,陕西 杨凌 712100 
刘菊莲 宁夏大学农学院,宁夏 银川 750021 
孙权 宁夏大学农学院,宁夏 银川 750021 
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中文摘要:
      应用四元二次通用旋转组合设计,采用DFT无土栽培,在二代节能日光温室内研究了营养液配方中的NO-3-N、P、K、Ca的摩尔浓度对空心菜生长的影响,得到了二者之间的回归方程,并进行了方差分析。结果表明:四个元素对空心菜产量的影响大小顺序是:氮>钾>磷>钙;通过对方程的解析,得到空心菜氮与钾的交互效应在较低水平时有一定的正相关关系,在较高水平时存在着一定的负相关关系;通过计算机模拟寻优,空心菜达到单株最高产量108.81 g时,NO-3-N、P、K、Ca 4个因子营养液的最优配方为:9、0.5、4.5和4.0 mmol/L。
英文摘要:
      The comprehensive effects of NO-3—N P K and Ca concentrations on growth of Ipomoea aquatica Forsk were studied by means of quadratic general rotational design under Deep Flow Technique(DFT) culture in energy saving greenhouse.The results calculated from regression equation between yield and the four element concentrations showed that the contribution to yield of Ipomoea aquatica Forsk was in the order of nitric-N(NO-3—N)>potassium (K)>phosphorus(P)>calcium (Ca).The interaction effect on yield between N and K was found significant which appeared in a positive correlation at lower level concentration and in a negative correlation at higher level concentration.The optimal ration of N P K and Ca for highest yield of individual Ipomoea aquatica Forsk (108.81g) was calculated by computer to be9.0 0.5 4.5and4.0mmol/L respectively. The verification experiment showed that the growth root vigor yield nutrient content and quality of Ipomoea aquatica Forsk in the optimized nutrient ration were all excelled those of the control.
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