灌溉上限对温室黄瓜初花期生理特性的影响  

Effect of irrigation maximum on physiological characteristics of cucumber during initial bloom stage in greenhouse

作　　者：李清明[1] 邹志荣[1] 刘彬彬[2] 

机构地区：[1]西北农林科技大学园艺学院,陕西杨凌712100 [2]中科院水利部水土保持与生态环境研究中心黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100

出　　处：《西北农林科技大学学报（自然科学版）》2007年第6期113-118,共6页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家"863"高技术研究与发展计划项目(2001AA247012)

摘　　要：为了确定温室黄瓜初花期土壤灌溉上限指标,对不同栽培季节、不同土壤灌溉上限处理的温室黄瓜初花期的生理特性进行了研究。结果表明,不论是秋茬还是春茬,在灌溉上限土壤含水量为90%田间持水量的条件下,黄瓜叶片相对含水量、自由水/束缚水、细胞汁液浓度和水势等水分生理指标比较适宜植株的健壮生长;叶绿素含量最高,分别较灌溉上限土壤含水量为100%田间持水量处理高0.14和0.19 g/kg;根系活力最强,分别较灌溉上限土壤含水量为100%田间持水量处理高0.17和0.12 g/(kg.h);叶片净光合速率和胞间CO2浓度在日变化过程中始终保持最高水平。因此,灌溉上限土壤含水量为90%田间持水量,有利于黄瓜初花期植株的生长和光合产物的形成及积累,为初花期适宜的节水灌溉上限指标。Physiological characteristics of cucamber were studied under different soil irrigation maximum and different seasons in greenhouse during initial bloom stage. The results showed whenever in autumn or in spring,under treatment H3 （soil irrigation maximum was 90% of field water capacity）,relative water content, free water/bound water rate, cytoliquid and water potential of cucumber leaves were more suitable for plants growing vigorously; chlorophyll content of cucumber leaves was 0. 14 and 0. 19 g/kg higher than treatment H4 （soil irrigation maximum were 100% of field water capacity） respectively; root activity was the highest and higher 0.17 and 0.12 g/（kg · h） than treatment H4 respectively;net photosynthesis rate was highest during diurnal variation. So 90% of field water capacity is the su＇itable soil irrigation maximum index which can accelerate the plant growth as well as synthesis and accumulation of photosynthate.

关 键 词：黄瓜 灌溉上限 初花期 生理特性 

分 类 号：S642.2[农业科学—蔬菜学]