塔里木灌区膜下滴灌棉田土壤水分动态与耗水特性
发布时间:2017-12-31 09:22
本文关键词:塔里木灌区膜下滴灌棉田土壤水分动态与耗水特性 出处:《节水灌溉》2016年02期 论文类型:期刊论文
【摘要】:土壤水分条件是棉花生长和发育的重要因素。为了研究塔里木灌区膜下滴灌棉田土壤水分特征,于2014年4月18日至10月31日采用中子仪对膜下滴灌棉田0~120cm土壤水分进行观测,分析了不同生育期土壤含水率的时空变化,采用水量平衡原理计算了膜下滴灌棉田耗水量。结果表明:4月中旬到7月中旬为土壤水分稳定期,7月中旬到8月底为土壤水分剧烈变化期,8月底到10月底为缓慢消耗期;0~20cm为土壤水分活跃层,20~60cm为土壤水分次活跃层,60~120cm为土壤水分稳定层;灌溉入渗水主要分布在0~40cm;膜下滴灌棉田苗期、蕾期、花铃期、吐絮期的耗水强度分别为0.63、2.62、7.01、0.71mm/d。
[Abstract]:In order to study the soil moisture characteristic of drip irrigation cotton field under the membrane of Tarim irrigation area , the soil moisture content in the drip irrigation cotton field was observed from April 18 to October 31 , 2014 . The water consumption of drip irrigation cotton field was calculated by using the water balance principle . The results showed that the soil moisture was stable at the end of August to the end of August , and the water consumption in the soil water was 0 锝,
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