干旱地区农业研究2013，Vol.31Issue(3)：74-78,5.
线辣椒苗期适宜的土壤水分下限与灌水指标研究
Study of soil moisture lower limits and irrigation index at seedling stage of capsicum
摘要
Abstract
Based on pot experiment,this paper studied coordinative effects of soil moisture lower limits and irrigation upper limit at seedling stage on the late stage yield of capsicum.The results showed that irrigation upper limit and soil moisture lower limits had obvious positive and interactive effects to capsicum yield.Main effect of upper irrigation limit was 1.65 times higher than that of lower moisture limit.Upper irrigation limit and soil moisture lower limit satisfied Diminishing Returns function.There was a reasonable coordinative zone between irrigation upper limit and soil moisture lower limit.For irrigation upper limit,rational range was from 62 ％ to 84.1％ ; For the soil moisture lower limit,it was from 40％ to 49％.In these rational ranges,increasing either irrigation upper limit or soil moisture lower limit could increase capsicum yield,and effect of upper irrigation limit and lower moisture limit were compensated each other in those ranges.In other words,decreasing irrigation upper limit (or moisture lower limit) could be compensated by increasing moisture lower limit (or irrigation upper limit) to maintain a stable and no-decreasing yield.The appropriate irrigation upper limit and soil moisture lower limit for potted capsicum of maximum yield were 84.1％ and 49 ％ of field capacity,respectively.关键词
线辣椒/苗期/灌水指标/土壤水分/二次回归正交旋转试验Key words
capsicum/ seedling stage/ irrigation index/ soil moisture/ quadratic rotation-orthogonal regressive combination design分类
农业科技引用本文复制引用
马甜,范兴科,吴普特..线辣椒苗期适宜的土壤水分下限与灌水指标研究[J].干旱地区农业研究,2013,31(3):74-78,5.基金项目
中国科学院知识创新工程重要方向项目"半干旱地区农业高效用水的生物学原理及其应用"(KICX3-SW-444) （KICX3-SW-444）
