磷硼互作对油菜生长发育、养分吸收及产量的影响

Effects of P,B interaction on growth,nutrition uptake and yield of Brassica nupus

以常规油菜品种中双9号和杂交油菜品种中油杂2号为材料,研究了盆栽条件下不同磷、硼供应水平对油菜生长发育、农艺性状、营养吸收及产量的影响。结果表明,在本试验条件下,磷肥用量是决定油菜不同生育期生物学产量的主要因素。在供磷条件下,适当增施硼肥能增加油菜生物学产量6.65%~19.39%,经济产量6.29%~104.44%;但在缺磷条件下,过高硼肥用量在一定程度上加重了油菜的缺磷症状,经济产量下降达17.65%~42.86%。杂交油菜中油杂2号花期对硼更加敏感,而常规品种中双9号成熟期对硼敏感。植株中氮、磷、钾养分含量随着施磷量的增加有着不同程度的提高,说明施磷有助于养分的吸收。

Pot experiment was conducted to study the effects of P,B interaction on growth,nutrition uptake and yield using rapeseed varieties Zhongshuang No.9 and Zhongyouza No.2 as plant materials.The results showed,under nomal NK condition,the application of different quantities of phosphorus fertilizer played a major role on the biomass of different stages and yield of rapeseed.Under the circumstances of normal phosphorous supply,proper boron fertilizer could increase biomass from 6.65% to 19.39% and yield of rapeseed from 6.29% to 104.44%;whereas under P deficiency,high boron application aggravated phosphorus deficiency symptoms and led a decrease of yield from 17.65% to 42.86%.During flowing stage Zhongyouza No.2 showed more sensitive to boron deficiency,however Zhongshuang No.9 showed more sensitive to boron deficiency in the mature stage.And increasing phosphorus apply improved the content of NPK of plant.