不同灌溉模式下氮肥水平对水稻生物学特性及水分利用效率的影响

为了研究不同灌溉模式下氮肥水平对水稻生物学特性及水分利用效率的影响,以两优培九为材料,设计3种不同的灌溉模式（常规灌溉、干湿交替灌溉和厢沟灌溉,分别记作W1,W2,W3）和4种不同氮肥水平（0,90,180,270 kg/hm2,分别记作F0,F1,F2,F3）的大田试验。结果表明：与W1处理相比,W2和W3处理水稻灌...

Effects of Nitrogenous Fertilizer Application on Biological Properties and Water Use Efficiency of Rice under Different Water Regimes

Effects of nitrogenous fertilizer management on the biological properties and water use efficiency of rice under different water regimes were studied using a rice cultivar in a field study.The cultivar was grown under traditional flooding irrigation(W1),wetting-drying alternative irrigation(W2) and bed-raised irrigation(W3) at four nitrogenous fertilizer application levels(0,90,180 and 270 kg/hm2,i.e.F0,F1,F2 and F3,respectively).Compare with W1,the MDA content in flag leaves at grain filling stage under W2 and W3 was decreased by 8.7% and 9.4%,rice yield was increased by 2.5% and 9.15,water consumption was decreased by 17.8% and 17.6%,and water use efficiency was increased by 25.0% and 32.5%,respectively.Under the same water regime,rice yield under F2 was significantly higher than that under other nitrogenous fertilizer application levels.Compared with the cultivation situation without applying nitrogenous fertilizer,root sap under F2 was increased by 28.4%,and the MDA content in flag leaves was decreased by 12.4%.Rice yield and water use efficiency under different treatments were also concerned.