玉米苗期调亏控水与磷协同效应研究

The Effect of the Combination of RDI and Fertilizer Phosphorus on Maize in Seedling Stage

采用桶栽试验研究了不同水、磷条件对玉米苗期生长发育、水分利用和养分吸收的影响。结果表明 ,水、磷都有利于玉米株高、叶面积和总生物量的增加 ,磷的作用更明显 ;苗期玉米调亏控水结合施磷有利于玉米苗期建立较大的根 /冠、培育壮苗、提高水分生产率 ;水、磷对氮、磷、钾养分向地上部运输都有促进作用 ,调亏控水条件下 ,施磷处理氮、磷。

In a pot trial,the investigate on the effects of the combination of water and phosphorus on the growth ,water production efficiency,and nutrient apsorption of maize in seedling stage showed that both water and phosphorus could increase the height of plant,the area of leaves and the total biomass,and the effect of phosphorus was more remarkable than that of water.The RDI(regulated deficit irrigation)combined phosphorus supply was favorable to raise the R/S ratio,to grow stronger maize ,and to increase the water production efficiency.Under RDI,compared to the treatments without applying phosphorus,treatments with applying phosphorus had higher proportion of nutrient N,P,K that being transported to the maize's above ground organs.