摘要
【目的】研究察布查尔县新垦盐渍化棉田盐分和离子的动态变化,为因地制宜引进抗旱耐盐作物品种和采取相应的栽培技术措施提供依据。【方法】分别在棉花6-8月生育期中每次灌水前后、收获前以及入冬降雪前,对膜间裸地处土壤分层取样,取样深度分别为0-20、20-40和40-60 cm,测定土壤总盐、pH、CO3^2-、HCO3^-、Cl^-、SO4^2-、K^＋、Na^＋、Ca^2＋和Mg^2＋含量。【结果】灌溉季节内,0-60 cm土层积盐脱盐交替变动,交替周期与灌水周期相对应。土壤盐分含量因灌溉呈下降趋势,入冬降雪前,盐分含量有所升高。其中0-20 cm土壤含盐量相对较低,但是变幅较大。【结论】0-60土层总体表现为脱盐,有碱化趋势,通过作物种植、合理灌排、引进抗盐品种等综合措施,有利于新垦土地的高效利用。
The dynamic change of soil salt and ion contents in the new cultivated salinity cotton field were studied and analyzed.The result showed that salt accumulaed and lost in the 0-60 cm soil layer in turn,in corresponding to the irrigation periods.The soil salt content in the 0-60 cm soil layer would reduce because of irrigation and raise to a certain extent before snow in winter.In general,the salt in 0-20 cm soil layer was lower and changed greatly.But in the 0-60 cm soil layer,salt tended to lose,and made the soil alkalinization.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2010年第5期929-931,共3页
Xinjiang Agricultural Sciences
基金
国家“十一五”科技支撑计划项目“新垦土地高效利用模式及配套技术开发与示范”(2007BAC15B03)
关键词
盐渍化
棉花
土壤盐分
动态
salinization
cotton
soil salinity
trends
