Study on Impact of Soil Moisture on Soybean Growth in the Northeastern Black Soil Area of China
Northeastern black soil area is one of important regions for crop production and commodity grains in China. Groundwater level is very deep and rainfall is the only source of soil water in this region. As one of main crops in this region, soybean is confronted with spring drought frequently. Pot experiments were done to study the impact of soil water on soybean at Heshan farm Heilongjiang province, and the Mass Water Content (MWC) treatments were 12％, 15％, 18％, 24％, 30％, 40％ and 48％ respectively. The results showed that there was good conical relationship between MWC and yield (R2=0.96). The yield reached peak with field capacity (FC); the yield of 60％ of FC reduced 50.32％ than that of FC; and 60％ of FC was a turning point of yield. There was conical relationship between dry weight proportion of beans. roots, bean stem and MWC. and R2 were 0.958. 0.914 and 0.957 respectively. 60％ of FC was the turning point of dry weight proportion of roots, and when soil water was below FC dry weight proportion of root increased linearly with soil water reducing.
northeastern black soil soil water soybean field capacity
Ying Wang Yun Xie Gang Liu Xingwu Duan Zhenning Sun
Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology, School of Geography,Beiiing 100875,China
国际会议
西安
英文
530-532
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）