不同水分条件下温室番茄土壤呼吸变异性分析  

Variation of Tomato Soil Respiration in Greenhouse under Different Soil Moisture

作　　者：曾睿[1] 梁银丽[1,2] 要晓玮[1] 罗安荣[3] 

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100 [2]中国科学院/水利部水土保持研究所,陕西杨凌712100 [3]西北农林科技大学生命科学学院,陕西杨凌712100

出　　处：《灌溉排水学报》2011年第6期111-114,共4页Journal of Irrigation and Drainage

基　　金：中国科学院重要方向项目(KZCX2-YW-443-3);国家"十二五"科技支撑计划项目(2011BAD31B05)

摘　　要：利用日光温室田间试验的方法,研究了不同时期不同土壤相对含水率对樱桃番茄土壤呼吸的影响。结果表明,土壤含水率为90%～100%田持时,番茄在生长季大部分时间的土壤呼吸速率较高,当土壤温度下降到20℃后,水分处理土壤呼吸速率差异不显著;变水处理对土壤呼吸存在后效应,高水变低水处理的土壤呼吸速率与恒水处理和低水变高水处理差异极显著;生长前期的低水处理会抑制后期中高水处理的土壤呼吸,后期土壤呼吸对土壤含水率的敏感性降低,50%～60%田持与70%～80%田持的土壤含水率处理间土壤呼吸差异不显著。土壤温度和土壤含水率与土壤呼吸之间呈显著正相关。土壤温度在20℃以上时,土壤水分显著影响土壤呼吸;土壤温度降到20℃以下后,不同土壤水分处理下土壤呼吸速率差异不显著。Based on the solar greenhouse field test, the influence of different soil relative water content on the tomato soil respiration at different periods was studied, for the purpose of discovering the variation of soil respiration when the soil relative water content changes. The results show that, when the soil relative water content was in 90%-100%, the tomato＇s soil respiration in solar greenhouse was highest in the growth season. But when the soil temperature dropped to 20 ℃ soil respiration shown no significant difference; Variable water treatment on soil respiration existed hysteresis, the difference of soil respiration between high-to-low water processing and the permanent water processing and low-to-high water processing to be extremely remarkable; Low-water processing at earlier growth period would inhibit late high-water treatment of soil respiration, the sensitivity of soil respiration to the soil moisture content at the mid and late growth period reduces, the difference between processing 50%-60% and processing 70-80% was not remarkable. Soil temperature and soil moisture had a significant positive correlation with soil respiration. When soil temperature was above 20 ℃, soil moisture had a significant impact on soil respiration; when dropped to below 20 ℃, the difference of soil respiration rate under different soil moisture processing was not significant.

关 键 词：土壤呼吸 变异性 不同水分 番茄 日光温室 

分 类 号：S641.2[农业科学—蔬菜学] S152[农业科学—园艺学]