不同土壤水分条件下保水剂对杨树水分利用效率的影响  

Effects of Super Absorbent Polymers on Water Use Efficiency of Poplar under Soil Water Conditions

作　　者：周朝彬[1] 李亚辉[1] 曾勇[1] 辛慧慧[1] 李慧强[1] 马逸风[2] 

机构地区：[1]石河子大学农学院,新疆石河子832000 [2]广元市农业局,四川广元628000

出　　处：《林业科技》2010年第5期5-7,共3页Forestry Science & Technology

基　　金：国家"十一五"科技支撑计划项目(2006BAD26B0901);石河子大学自然科学基金项目(RCZX200725)

摘　　要：比较了不同保水剂使用量下土壤有效贮水量,设置3种土壤水分条件(田间持水量的70%、55%和40%)研究了保水剂对杨树水分利用特征的影响。结果表明,随着保水剂用量的增大,土壤有效贮水量增加;随干旱程度增加,叶片水势和生物量降低。三种土壤水分条件下,随着保水剂用量的增加,灌水量显著减少;同一保水剂用量情况下,中度土壤干旱条件下水分利用效率最大;随着保水剂用量的增加,各干旱条件下水分利用效率相应上升。This paper compared available soil water content treated by different super absorbent polymers content,studied the effect of different super absorbent polymers contents on water use characteristics of poplar under three different soil water regimes：adequate soil water,medium drought,and severe drought conditions,which were about 70%,55% and 40% of field capacity.Results showed that available soil water content increased with increased in super absorbent polymers content;with water stress increased,leaf water potential and biomass decreased.Irrigation quantity decreased significantly with super absorbent polymers content increased under three soil water regimes,water use efficiency was highest under medium drought conditions at same levels of super absorbent polymers content,with super absorbent polymers contents increased,water use efficiency increased at all soil water conditions.

关 键 词：保水剂 有效贮水量 生物量 水分利用效率 

分 类 号：S152.7[农业科学—土壤学] S156.2[农业科学—农业基础科学]