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时间:2020-04-14
《全地膜覆盖棉田咸水滴灌对土壤水盐分布的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、山东农业科学2015,47(1):55~60ShandongAgriculturalSciencesDOI:10.14083/j.issn.1001—4942.2015.01.014全地膜覆盖棉田成水滴灌对土壤水盐分布的影响孙泽强,董亮,王学君,董晓霞,郑东峰,刘兆辉(1.山东省农业科学院农业资源与环境研究所/农业部山东耕地保育科学观测实验站,山东济南250100:2.农业部黄淮海平原农业环境重点实验室,山东济南250100;3.山东省农业科学院,山东济南250100)摘要:通过田间定位小区试验,以淡水滴灌
2、为对照,设置不同矿化度成水滴灌处理,研究全地膜覆盖条件下,咸水滴灌棉田土壤水分和盐分的动态变化和分布特征。结果表明,咸水滴灌减少了棉花对土壤水分的吸收,HCO。一一Na型咸水矿化度对棉花根系吸水的影响要大于cl一一Na型咸水。土壤水分受到前期灌溉水量和灌溉水盐分的影响,这种影响在整个生育期都存在。各种灌溉处理都使得0—100cm土体剖面的土壤EC值增加,土壤盐分随着灌溉水矿化度的增加而增加。从土壤盐分的积累来看,利用滴灌补灌一次6g/L以下的咸水,通过种植前黄河水压盐和夏季降水淋洗,不会造成棉花根系分布层土
3、壤盐分的明显积累。关键词:棉花;咸水滴灌;全地膜覆盖;水盐动态中图分类号:$275.6文献标识号:A文章编号:1001—4942(2015)01—0055—04EffectsofDripIrrigationwithSalineWateronSoilWaterandSaltDistributioninCottonFieldunderFullFilmMulchingSunZeqiang,DongLiang,WangXuejun,DongXiaoxia,ZhengDongfeng.LiuZhaohui,(1.In
4、stituteofAgriculturalResourcesandEnvironment,ShandongAcademyofgriculturalSciences~ScientifcExperimentalStationofPreservationofCultivatedlandinShandong,MiniswyofAgri~ture,Jl250100,Ch/na;2.撕[x~boratoryofAgriculturalEnvironmentofHuare一一Ha/P/a/n,M~n/stryofg,J/
5、nan250100,Odna;3Shondongacoa~ofAgriculturalSciences,250100,Ch/na)AbstractAfieldexperimentwithlocatingplotswascarriedouttoresearchthechangingdynamicsanddistributioncharacteristicsofsoilwaterandsaltincottonfieldsviadripirrigationwithsalinewaterunderfullfilmm
6、ulching.Differentsalinitiesofirrigationwaterweresetwithfreshwaterascontro1.Theresultsshowedthatdripirrigationwithsaltwaterreducedthesoilwatercontentabsorbedbycotton.TheeffectofHCO一一NatypewateronwateruptakeofcottonrootwasgreaterthanthatofC1一一Natypewater.Soi
7、lwaterwasaf-fectedbypre—irrigationwateranditssalinity,andtheeffectsexistedinthewholegrowthperiod.TheECva1.uesin0~100emsoillayerswereincreasedbyalltheirigationtreatments.Thesoilsalinityincreasedwiththesalinityofirrigationwater.Dripirigationonetimewithwaterw
8、hosesalinitywaslessthan6g/LwouldnotcauseobviousaccumulationofsoilsalinityincottonrootdistributionlayerthroughirigationwiththeYellowRiverwaterbeforeplantingandleachedbyrainfallinsummer.KeywordsCotton;Dripirrig
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