基于灰色关联投影模型大豆高产栽培调亏灌溉制度评价

Evaluation of High Yield Cultivation and Regulated Deficit Irrigation System of Soybean Based on Grey Relation Projection Model

调亏灌溉是一种行之有效的节水灌溉方式,对于缓解农业用水紧张,提高农业用水利用效率具有重大意义。而一种灌溉制度的好坏很难直观评价,因此以大豆盆栽试验为基础,选择净光合速率、产量、水分利用效率和耗水量这4个具有代表性的指标采用灰色关联投影模型对调亏灌溉制度进行综合评价,通过对灰色关联度投影值(Di)排序得到各指标对综合评价贡献率的大小。试验结果表明,苗期和分枝期灌水为田间持水率的70%,开花结荚期灌水为田间持水率的80%,鼓粒期灌水为田间持水率80%对寒区黑土大豆生长最有利。

Regulated Deficit irrigation is an effective water-saving irrigation method, which is of great significance to ease agricultural water use stress and to improve agricultural water use efficiency. It＇s difficult to directly evaluate the quality of an irrigation system. On the basis of soybean pot experiment, photosynthesis rate （ the sum of each growth stage）, yield, water using efficiency and water consumption are selected as four representative index. Gray correlation projection model for comprehensive evaluation of controlling irrigation regime is adopted. The rank of each index on the comprehensive evaluation of the rate is obtained by gray relation projection values （Di ）.The results show that： when irrigation amount is70% of field capacity in seeding stage and branching stage, 80% in flowering stage, and 80% in simulating stage, it is the most favorable for the growth of soybean in black soil area.