摘要
通过利用烘干法和中子仪法对膜下滴灌棉花和常规沟灌棉花的土壤干旱情况进行诊断试验 ,该文对所选的两种干旱诊断指标—作物适宜土壤含水率和作物缺水指标 CWSI的特点进行了研究。试验和分析表明 ,两种灌水方式下的棉花生长对土壤水分环境的要求是一致的。另外 ,两种指标所反映出的规律也基本相同。但是 ,因膜下滴灌棉花的耐旱性弱 ,受旱风险大 ,在生产中进行灌水决策时 。
Based on experiments by using the methods of weighing soil moisture through drying and neutron probe, the soil drought condition was diagnosed for the cotton which was irrigated respectively with drip irrigation under mulch and furrow irrigation. By using two selected indexes of drought diagnosis, the soil moisture content suitable for growing crop and the crop water stress index (CWSI) were evaluated. According to the experiments and analyses, it is revealed that the soil moisture conditions required by the growing cotton, do not change with the irrigation techniques. In its high water demand period, the cotton, whether it was irrigated with drip irrigation under mulch or with furrow one, has almost identical index for drought diagnosis. Due to its poor drought tolerance and its high drought danger, however, the cotton irrigated with the drip irrigation under mulch should be given more water for the drought diagnosis compared with the one irrigated with furrow technique when the irrigation scheme decision is made for the cotton.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2002年第1期49-52,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
新疆生产建设兵团重大科技项目攻关计划"干旱区棉花膜下滴灌综合配套技术研究与示范"(GKB99NKYGJ16NJ)部分内容
