内蒙古中部牧区青贮玉米与苜蓿立体种植灌溉制度优化

Irrigation Schedule Optimization of Maize and Alfalfa Intercropping in the Middle of Pastoral Area of Inner Mongolia

灌溉制度设计与作物种植模式紧密联系,随着现代农业的发展,作物种植模式日益多元化,各种间作、混作和立体种植模式的出现,给优化灌溉制度的制定提出了新的挑战。本文在田间灌溉试验的基础上,引入模拟灌溉制度的ISAREG模型研究立体种植模式下的灌溉制度,对青贮玉米与苜蓿立体种植实际灌溉制度的评价表明,其灌水定额和灌水时间均存在不适宜的问题,需要进行优化设计;在验证模型和参数率定的基础上模拟多种灌水方案,得出了青贮玉米与苜蓿立体种植模式下的优化灌溉制度。

It′s necessary to keep on studying irrigation schedule optimization with the development of modern agriculture and emergence the various intercropping,mixed cropping and three-dimensional planting model,and that the relationship between irrigation schedule design and crop planting mode is close.The irrigation schedule of maize and alfalfa intercropping was studied based on irrigation experiment by combination of ISAREG model and planting mode.The actual irrigation schedule of two trial treatments of maize and alfalfa intercropping was appraised,and the result indicated that its irrigation quota and irrigation time were not suitable and the design need to be optimized;on this foundation,the multiple group schemes were designed based on water requirement characteristic of maize and alfalfa intercropping,and optimized irrigation schedule was separately gained.