摘要
为探究砂石覆盖对滨海盐碱土水盐分布特征的影响,开展了室内不同砂石覆盖度(0、25%、50%、75%、100%)滨海盐碱土蒸发及水盐分布试验,结果表明,覆砂能有效地保持土壤水分,降低土壤表层盐分含量,且保墒抑盐效果随砂石覆盖度的增加而增加。试验期间,覆砂处理土壤表层含水率较CK增加了58.57%~232.71%,剖面含水率较CK增加了82.41%~220.91%,表层土壤盐分含量较CK降低了22.72%~46.04%,土壤剖面盐分含量较CK降低了7.15%~11.76%;砂石覆盖可有效地抑制土壤表层积聚,提高土壤剖面盐分空间分布均匀性;试验期间,覆砂处理土壤蒸发强度比CK处理降低了15.51%~48.82%,蒸发初期砂石覆盖对土壤蒸发强度抑制作用强于蒸发后期。
In order to explore the distribution characteristics of sand and gravel coverage on coastal saline-alkali soil water and salt,this paper adopts laboratory experiments to study the effects of sand and gravel coverage(0,25%,50%,75%,100%)on soil water,salt and evaporation.influence of characteristics.The results show that sand covering can effectively retain soil moisture and reduce the salinity content of soil surface,the effect of preserving moisture and salt inhibition increases with the increase in sand coverage.During the test period,the soil surface water content in the sand-covered treatment increased by 58.57%~232.71%compared with CK,the profile water content increased by 82.41%~220.91%compared with the CK treatment,and the surface soil salinity content decreased by 22.72%~46.04%compared with CK.Compared with CK,the salinity content decreased by 7.15%~11.76%.Sand and gravel coverage can effectively inhibit the accumulation of soil surface and improve the spatial distribution uniformity of salinity in the soil profile;during the test period,the soil evaporation intensity in the sand-covered treatment decreased by 15.51%~48.82%compared with the CK treatment,the effect of sand and gravel mulching on soil evaporation intensity was stronger in the early stage of evaporation than in the later stage of evaporation.
作者
胡岸
陈东辉
王亚钊
邓亚鹏
HU An;CHEN Dong-hui;WANG Ya-zhao;DENG Ya-peng(Shijiazhuang Water Conservancy Technology Promotion Center,Shijiazhuang 050000,Hebei Province,China;Shanghai Chengyu Environmental Protection Engineering Company,Shanghai 201400,China)
出处
《中国农村水利水电》
北大核心
2023年第8期217-221,228,共6页
China Rural Water and Hydropower
关键词
砂石覆盖
土壤蒸发
水盐分布
滨海盐碱土
soil evaporation
water and salt distribution
sand and gravel coverage
coastal saline-alkali soil
