摘要
以生产上的大畦灌和常规沟灌为对照,研究了不同时期交替沟灌对土壤水分变化、甘蓝生长、生理、产量和水分利用的影响。结果表明:与常规沟灌相比,甘蓝缓苗后交替沟灌节水17%,产量差异不显著,水分利用效率增加3.5 kg/m3;莲座期后交替沟灌节水8%,而产量增加8.1%,水分利用效率增加3.4 kg/m3。与大畦灌相比,莲座后交替沟灌节水23%,全生育期平均光合速率增加48%,蒸腾速率减少19%,根长密度和根总表面积分别增加29%和38%,产量增加24%,水分利用效率增加8.4 kg/m3。常规沟灌与大畦灌相比节水16%,产量增加15%,水分利用效率增加5.0 kg/m3。建议甘蓝种植采用莲座后交替沟灌较好。
The effects of alternate furrow irrigation on open field spring cabbage were studied on soil moisture,plant growth,psychology and water use efficiency,with furrow irrigation and full irrigation control.The results showed：comparing to furrow irrigation,alternate furrow irrigation after revival saved water by 17%,while water use efficiency increased 3.5 kg/m3;alternate furrow irrigation after lotus seat saved water by 8%,while water use efficiency increased 3.4 kg/m3;comparing to full irrigation,furrow irrigation saved water by 17%,while water use efficiency increased 5.0 kg/m3.Comparing to full irrigation,alternate furrow irrigation after lotus seat could increase photosynthetic rate,root length density and total root surface area,reduce transpiration rate,increase econonmic yield by 24%,increase water use efficiency by 8.4 kg/m3,while save water by 23%.What＇s more,combined with suitable irrigaiton pipe and fertigation equipement,alternate furrow irrigation is a useful and economical way for water saving.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第4期40-45,共6页
Agricultural Research in the Arid Areas
基金
北京市科委资助项目
蔬菜节水关键技术示范推广(Z07090500550725)
关键词
交替沟灌
露地春甘蓝
光合生理
水分利用效率
cabbage on open field
alternate furrow irrigation
psychology
water use efficiency
irrigation pipe
