摘要
为研究河套灌区小麦套种玉米高产、节水的灌溉制度,在田间试验的基础上分析了小麦套种玉米模式下的耗水规律,运用Jensen模型建立水分生产函数并对灌溉制度进行了优化。结果表明：小麦拔节、抽穗、灌浆及玉米抽雄、灌浆期是作物生长的关键期,适宜的水分条件是促进产量形成的重要因素;通过多元线性回归方法求解得出敏感性指数分别为小麦分蘖-拔节期（0.305 0）、小麦拔节-抽穗期（0.335 6）、小麦抽穗-灌浆期（0.143 2）、玉米拔节-抽雄期（0.320 7）、玉米抽雄-灌浆期（0.310 2）;以产量最大为目标函数得出小麦套种玉米最优灌溉制度为：小麦分蘖-拔节期95mm,拔节-抽穗期105~110mm,抽穗-灌浆期65~70mm,玉米拔节-抽雄期95~105mm,抽雄-灌浆期100~105mm,全生育期以460~485mm的灌溉供水量为宜。
In order to study a high-yielding and water-saving irrigation regime for wheat interplanting maize in Hetao Irrigation District,the crop evaportranspiration rule for interplanting mode is measured based on field experiment,the crop water productivity function is established by using the Jensen model,and the irrigation regime was optimized.The results show that wheat jointing,heading,grain filling and maize pumping stage are the key stages of crop growth,appropriate water condition is an important factor for promoting the formation of yield.Through the multiple linear regression method,it is obtained that the sensitivity index is 0.3050 for wheat tillering-jointing stage,0.335 6for jointing-heading stage,0.143 2for heading-grain filling stage,0.320 7for maize jointing-tasseling stage and 0.310 2for tasseling-grain filling stage,respectively.With the objective function for maximum yield,the optimal irrigation regime for wheat interplanting maize is obtained,which is 95 mm at wheat tillering to jointing stage,105~110mm at jointing to heading stage,65~70mm at heading to grain filling stage,95~105mm at jointing to tasseling stage and 100~105mm at tasseling to grain filling stage,and 460~485mm for total growth period.
出处
《节水灌溉》
北大核心
2016年第4期44-46,49,共4页
Water Saving Irrigation
基金
内蒙古教育厅自然科学基金项目(njzy263)
内蒙古自治区高等学校创新团队发展计划(NMGIRT-B1611)
关键词
小麦套种玉米
灌溉制度
JENSEN模型
河套灌区
wheat interplanting maize
irrigation regime
Jensen model
Hetao Irrigation District
