摘要：In order to explore the water consumption characteristics of soybeans in the cold black soil area and their sensitivity to water in each growth stage, the water consumption test of soybean was carried out in the potting field of Heilongjiang Bayi Agricultural University in 2019. Through the barrel test, this paper adopts the comprehensive test design to analyze the variation characteristics of soybean water consumption in different growth stages, and establishes the model of soybean water production function in the area, which clarifies the water consumption regularity and the effect of water deficit on yield in each growth stage. The results showed that in the various growth stages of soybean, the water consumption from large to small was the Filling period, the knotting period, the flowering period and the seedling period. The average water consumption and water consumption modulus of each treatment in the drumming period were the highest, which were 107.8 mm and 0.45 mm respectively. The heavy variation coefficient of water consumption during the flowering period was the highest, which was 0.079. Through the Jensen model, the order of the sensitivity to moisture in each growth stage was calculated from flowering period to Filling period to knotting period to seedling period. It indicated that the flowering period was the most sensitive stage of soybean water requirement; the growth index of soybean was calculated to be the fastest growing rate after 100- 150 days after seedling period, and the correlation coefficient was higher in this model, so it is suitable for the area. The research results can be used to study the water demand law and the optimal allocation of water resources in the black soil region of the northeastern cold region.
关键词：Soybean cold black soil area;water consumption characteristics;water production function
