The effect of water levels on yield and water use efficiency of soybean in northeast black soil region
Field experiments of controlling water with water levels including over water treatment (I1) , suitable water treatment (I2) , drought water treatment (I3) and natural rainfall (R) were carried out in order to study the effect of different water levels on yield and water use efficiency of soybean in Hailun agricultural ecology station of Chinese Academy of Sciences in 2011 . The biomass and plant height of soybean in different treatments were in increasing order of I3 < R < I2 < I1. However, 12 treatment improved significantly agronomic traits of soybean with higher 100-grain weight, more pods per plant and lower flat pods per plant. The yield of soybean was the highest within I2, and increased by 13 .7% , 12.4% and 24.1 % compared with I1, R and I3. It could be revealed that the time of water input is an important factor controlling yield of soybean excepting for volume of water input by the difference between I2 and R. The highest water use efficiency was observed in 13 with 18.36 kg/(hm2·mm), and the second was in I2 with 14.38 kg/(hm2·mm). Therefore , in terms of yield and water use efficiency of soybean, I2 with 347 mm volume of water input could meet the water demand of soybean in the growing season, and irrigation time was critical for saving irrigation water and increasing yield and water use efficiency.
black soil regionirrigationyieldwater use efficiency
国家科技期刊平台
NSTL
万方数据
维普
