黑土区水肥耦合对大豆产量的影响

Effects of Water and Fertilizer Coupling on Yield of Soybean at Black Soil Area

通过盆栽试验条件,设置不同灌水和施钾处理,研究水钾耦合对大豆产量的影响,试验结果分析表明:水分对大豆产量影响大于钾肥的影响。大豆产量很大程度上依赖于水分供应的多少,在水分充足时增施钾肥可以提高大豆产量和株高,水分的增产十分显著,水分对产量影响增产最大为25.6%,但水分过高对大豆生产有毒害作用。随着水分和施肥量的增加,产量增加,在相对含水量为60%和肥料F3(N:0.04 g/kg、P2O5:0.02 g/kg、K2O:0.30 g/kg)情况下,产量最高(17.7 g/株),比无钾肥干旱增产33.7%。

Pot experiments were conducted to determine the effects of water and potassium （K） fertilizer coupling on yield of soybean by designing different water and K fertilizer treatments. Tne results showed that the yield of soybean was strongly dependent on water supply. Sufficient water supply significantly increased the yield and height of soybean at the highest yield-increasing rate of 25.6% when K fertilizer application was increased, however, excessive water supply negatively influenced the yield of soybean, The yield of soybean increased with increasing water and fertilizers supply, The highest yield was 35.3 g per pot and increased at a rate of 33.7% compared to the treatment without fertilizer and water supply in the case of relative water content 60% and fertilizer treatments with N 0.04 g/kg soil, P2O5 0.02 g/kg soil and K2O 0.30 g/kg soil.