Research On Design Method Of Drip Irrigation System Under Mulch Of Corn With High Photosynthetic Efficiency

There are many researches on the technologies of drip irrigation under mulch and cornhigh photosynthetic efficiency planting. This paper does the researches which connectthese two technologies. It contains the following four parts: the research on designmethod of drip irrigation, the sensitivity analysis of key parameters, the law of cornwater requirement, and the optimization of pipeline network.Firstly, the design of drip irrigation under mulch to farmland, which is a standardparcel with high photosynthetic efficiency, is adopted the traditional method.According to the planting experience of Qian’an, the wide row spacing is1.1meter andthe narrow row spacing is0.5meter. In the design, the humid zone width is0.8meter,and the wetting proportion is50percent. Secondly, a few of parameters which mayinfluent the investment are analyzed, for example, the soil bulk density, the fieldholding moist content and the wetting proportion. The result shows that the threeparameters influence system investment less, so the design method can be made byconventional ways. Thirdly, the trial protocol is designed using orthogonal test methodto determine water consumption intensity. The test results of water requirement lawshow that water consumption intensity can be chosen between5and5.5millimeter perday. Finally, the minimum spanning tree technology in graph theory algorithm is usedto optimize the pipeline network layout. Research shows that when all pipes betweenperpendicular to each other and the branch pipe is perpendicular to the direction ofcorn ridge, the system investment is optimal.The test research shows that the planting patterns of corn high photosyntheticefficiency combined with the technology of drip irrigation under mulch has multipleadvantages such as increasing yield, resisting adverse weather conditions, combatingdrought and lodging resistance. In conclusion, the result can not only provide thetheory basis for the practical engineering design, but also fill the blank of the researchfield.