塑料大棚中不同灌水量上限对生菜生长、品质及生理特性的影响  

Effects of different irrigation maxima on the growth,quality and physiological characteristics of lettuce in plastic greenhouse

作　　者：裴芸[1] 别之龙[1] 

机构地区：[1]华中农业大学园艺林学学院园艺植物生物学教育部重点实验室,武汉430070

出　　处：《农业工程学报》2007年第9期176-180,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(30500346)

摘　　要：以两个散叶生菜品种（弘农和绿领）为材料,研究了塑料大棚栽培条件下不同土壤含水量（分别为田间持水量的60%～100%、60%～90%、60%～80%、60%～70%）处理对生菜生长、品质和生理特性的影响.收获期测定的结果表明,以田间持水量的90%作为灌水量上限条件下生菜地上部干鲜质量、叶面积、叶片数均最高,田间持水量80%为灌水上限条件下生菜地上部的生长优于田间持水量100%为灌水上限处理.随着灌水量上限的降低,生菜可溶性糖、可溶性蛋白含量逐渐升高,田间持水量80%和70%为灌水量上限处理下的维生素C含量显著高于其他两个灌水量上限处理.田间持水量70%的灌水量上限处理下生菜叶片中的MDA（丙二醛）、SOD（超氧化物岐化酶）、CAT（过氧化氢酶）和Pro（脯氨酸）含量最高,膜脂过氧化程度最重.本试验的结果表明,以田间持水量90%为灌水量上限处理下生菜的产量最高,综合不同灌水上限处理对产量和品质的影响,认为田间持水量80%的灌水量上限处理是最适合生菜生长的灌水处理.The effects of different field water capacities（60% ~100%, 60% ~90%, 60% ~80%, 60% ~70% ） on the growth, quality and physiological characteristics of lettuce were investigated. The results showed that the greatest shoot fresh and dry weight, leaf area and leaf number were obtained by 90% irrigation maxima treatment, soluble sugar, soluble protein of lettuce gradually increased with the decrease of irrigation maxima, the vitamin C contents of lettuce under 80% and 70% irrigation maxima were significantly higher than those of other treatments. The highest contents of MDA, SOD, CAT and Pro were obtained by 70% irrigation maximum treatment. The highest yield was obtained by 90% irrigation maximum treatment, whereas the best irrigation maximum was 80% for the growth and quality of lettuce.

关 键 词：生菜 灌水量上限 生长 品质 保护酶 

分 类 号：S625.58[农业科学—园艺学]