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在4级水势下盆栽甘蓝159天,获得以下结果:甘蓝植株含水量与水势呈线性负相关;甘蓝日耗水量及干物质积累量分别与水势呈幂函数和指数负相关;甘蓝植株含N量与水势呈正相关而PK含量与水势呈负相关,因而其N/P和N/K随水势增高而升高,呈线性正相关。甘蓝对NPK养分的吸收量因水势增高而减少,呈幂函数负相关。
The results showed that the water content of cabbage was linearly negatively correlated with water potential. The daily water consumption and dry matter accumulation of cabbage were negatively correlated with water potential and exponential, respectively. The content of N in cabbage There was a positive correlation between water potential and PK content and water potential. Therefore, N / P and N / K increased linearly with increasing water potential. The nutrient uptake of NPK in cabbage decreased with the increase of water potential, and was negatively related to power function.