【摘要】 采用盆栽试验,研究在冲积性菜园土不同施肥条件下小白菜生育期的物质积累及其对N、P、K养分吸收的变化规律.结果表明,小白菜物质积累主要集中在移栽后30～45d,占全生育期的50%以上;每棵小白菜全生育期平均吸氮、吸磷、吸钾818.6、87.1、713.3g,各处理小白菜吸收N、P2O5、K2O的质量比为1∶0.23∶1.06;小白菜植株的氮素吸收总量与产量显著相关(r=0.935*),磷素吸收总量与产量极显著相关(r=0.970**),钾素吸收量与产量的相关性没有达到显著水平.更多还原

【Abstract】 A pot experiment was carried out to study dynamic variations of biomass accumulation of Chinese cabbage and N, P, K nutrient uptake at different growth stages as affected by various fertilizations under the alluvial vegetable soil. The results showed the substance auumulation of cabbage mainly appears in the middle vigorous growth period from the 30th to 45th days after transplanting. The absorbed nutrient rates for Chinese cabbage were: N、P2O5、K2O 818.6、87.1、713.3 g/pot with the ratio of 1∶0.23∶1.06, respectively, during the whole growing season. It was shown that N absorption had a significant correlation with output, r=0.935*. There was a significant correlation between P nutrient uptake and output, r=0.970**. There was a relatively poor correlation between available K and yield of cabbage.更多还原