作　　者： (王旭）; (任秋实）; (孙兆军）; (王正）; (焦炳忠）;

机构地区： 宁夏大学土木与水利工程学院,银川750021

出　　处： 《节水灌溉》 2017年第9期17-19,共3页

摘　　要： 为研究返青期水层深度对宁夏银北地区盐碱地水稻生长指标及产量的影响,在水稻的返青期分别设置20、35、50 mm 3个不同的水层深度进行控制灌溉,通过田间对比试验分析不同水层深度对水稻根区土壤盐分含量、保苗率、生长指标、产量及灌溉水分生产率的影响。试验结果表明:水层深度为50 mm时脱盐效果最显著;水层深度为35 mm时保苗率为95%、产量达7 200 kg/hm^2、灌溉水分生产率为0.51 kg/m^3,3个指标是处理间最高的,也未出现返盐现象。因此,水稻返青期水层深度控制在35 mm更有利于宁夏银北地区盐碱地水稻的生长。 In order to discuss the effects of the depth of water-course in the period of seedling establishment on the physiological index and yields of rice in saline-alkali land area in northern Ningxia, three treatments, including 20, 35, 50 mm water layer in the root of rice, are set up to conduct control irrigation to analyze the influence of different water layer depth on the salinity, growth indicators, yield and irrigation water productivity of the soil in rice root zone. The results show that the desalting effect is most obviously when water layer depth is 50 ram; under 35 mm depth, the seedling rate is 95%, the yield is 7 200 kg/hm2, the irrigation water productivity is 0.51 kg/m3, and the above three indicators are the highest in total test. Therefore, during the period of seedling establishment, 35 mm water layer depth is more advantageous for the growth of rice in saline-alkali land of north Ningxia.

关 键 词： 返青期 水层深度 土壤盐分 生长指标 灌溉水分生产率