CAJ | 학술논문

通过田间定位小区试验，以淡水滴灌为对照，设置不同矿化度咸水滴灌处理，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，HCO3－－Na＋型咸水矿化度对棉花根系吸水的影响要大于Cl－－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0～100 cm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6 g／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壤盐分的明显积累。
통과전간정위소구시험，이담수적관위대조，설치불동광화도함수적관처리，연구전지막복개조건하，함수적관면전토양수분화염분적동태변화화분포특정。결과표명，함수적관감소료면화대토양수분적흡수，HCO3－－Na＋형함수광화도대면화근계흡수적영향요대우Cl－－Na＋형함수。토양수분수도전기관개수량화관개수염분적영향，저충영향재정개생육기도존재。각충관개처리도사득0～100 cm토체부면적토양EC치증가，토양염분수착관개수광화도적증가이증가。종토양염분적적루래간，이용적관보관일차6 g／L이하적함수，통과충식전황하수압염화하계강수림세，불회조성면화근계분포층토양염분적명현적루。
A field experiment with locating plots was carried out to research the changing dynamics and distribution characteristics of soil water and salt in cotton fields via drip irrigation with saline water under full film mulching.Different salinities of irrigation water were set with fresh water as control.The results showed that drip irrigation with salt water reduced the soil water content absorbed by cotton.The effect of HCO3 --Na+type water on water uptake of cotton root was greater than that of Cl --Na +type water.Soil water was af-fected by pre-irrigation water and its salinity, and the effects existed in the whole growth period.The EC val-ues in 0~100 cm soil layers were increased by all the irrigation treatments.The soil salinity increased with the salinity of irrigation water.Drip irrigation one time with water whose salinity was less than 6 g/L would not cause obvious accumulation of soil salinity in cotton root distribution layer through irrigation with the Yellow River water before planting and leached by rainfall in summer.