不同水分条件下保水剂对土壤持水与供水能力的影响  

Effects of water-retaining agent onsoil water retention and supplying water under different water conditions

作　　者：杨永辉[1,2] 李宗军 武继承[1,2] 李学军 何方[1,2] 杨先明 

机构地区：[1]河南省农业科学院植物营养与资源环境研究所,郑州450002 [2]农业部作物高效用水原阳科学观测站,河南原阳453514 [3]通许县农业科学研究所,河南通许475600 [4]郑州锦荣生物科技有限公司,郑州450002

出　　处：《中国水土保持科学》2012年第6期58-63,共6页Science of Soil and Water Conservation

基　　金：国家"863"节水农业项目"绿色环保多功能保水制剂"(2006AA100215);公益性行业(农业)科研专项经费项目"黄淮海高产农田作物需水及高效用水技术研究与示范"(201203077);河南省杰出青年基金"保水剂应用对土壤环境的影响研究"(104100510024)

摘　　要：为探明水分条件对保水剂作用效果的影响,采用盆栽实验,测定冬小麦生长结束后不同水分条件下保水剂不同用量(T1:0、T2:27 mg/kg、T3:54 mg/kg、T4:81 mg/kg)处理的土壤持水、供水及导水性能等。结果表明:保水剂的施用均提高了土壤持水、供水、导水能力及土壤有效水含量。轻度胁迫条件下,以T3处理的持水能力、有效水含量及导水能力最强,而供水能力以T4处理为佳;充分供水条件下,随保水剂用量的增加,土壤持水能力、供水能力、有效水含量及导水能力均提高,但T3和T4处理间差异不显著。与轻度胁迫相比,充分供水条件下各处理的持水能力、供水能力及导水能力均较高,而有效水含量以轻度胁迫条件下的T3处理较高,较对照增加18.6%。从经济的角度考虑,2水分条件下以T3处理(54 mg/kg)效果为佳。In order to ascertain the effects of water-retaining agent on soil moisture characteristics under different soil moisture conditions after the growth of winter wheat,the effects of different dosage of water-retaining agent（T1：0;T2：27 mg/kg;T3：54 mg/kg;T4：81 mg/kg） on soil water retention,supplying water and infiltration capacity were studied through potting experiment condition were studied.The results indicated that water-retaining agent increased the capability of soil water retention,supplying water,infiltration and available moisture.Under mild stress condition,the capability of soil water retention,infiltration and available moisture of treatment 3 were the best compared with other treatments,while treatment 4 was the best for the capability of supplying water compared with other treatments.Under sufficient irrigation,the capability of soil water retention,supplying water,infiltration and available moisture increased with the dosage of water-retaining agent,but there was not significant difference between treatment 3 and treatment 4.Compared with mild water stress,the capability of soil water retention,supplying water and infiltration under the condition of sufficient irrigation were higher.Soil available moisture of treatment 3 under mild water stress was highest among all treatments,which increased by 18.6% compared to the control.In all,from economical aspect,treatment 3 was the best to improve the soil properties.

关 键 词：保水剂 水分条件 持水能力 供水能力 土壤有效水 

分 类 号：S435.313.1[农业科学—农业昆虫与害虫防治]