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

作　　者：马甜 范兴科[2] 吴普特[2] 

机构地区：[1]深圳市水务规划设计院,广东深圳518036 [2]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《干旱地区农业研究》2013年第3期74-78,共5页Agricultural Research in the Arid Areas

基　　金：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)

摘　　要：应用盆栽试验研究了线辣椒苗期土壤水分下限、灌水上限对后期产量的协同效应,结果表明：灌水上限与土壤水分下限对线辣椒产量有明显的正效应和交互效应,灌水上限主效应为土壤水分下限主效应的1.65倍;线辣椒灌水上限与土壤水分下限之间的效应函数为报酬递减函数,灌水上限与土壤水分下限效应存在一个合理协同区域,灌水上限为62%~84.1%,土壤水分下限为40%~49%;在上述协同区域内,提高灌水上限、土壤水分下限均能起到增产的目的,且两因素之间的作用具有补偿性,即灌水上限（或土壤水分下限）的降低可以通过增加土壤水分下限（或灌水上限）的水平保证产量不减;本盆栽试验线辣椒获得最大产量的适宜灌水上限为相当于田间持水量的84.1%,土壤水分下限为相当于田间持水量的49%。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 

分 类 号：S274.1[农业科学—农业水土工程] S641.3[农业科学—农业工程]