不同氮肥管理措施在华北平原冬小麦上的应用效果.pdf

2011, 17( 3): 517- 524 Plant Nutrition and Fertilizer Science 赵士诚, 沙之敏, 何 萍* (, , 100081) : , , , , , 21, 2 , N 60 kg/hm , 2 ; N 240 kg/hm 13 , , , , , : ; ; ; + : S512. 1 1. 062 : A : 1008- 505X( 2011) 03- 0517- 08 Response ofwinterwheat to different nitrogen managements in North Central China * ZHAO Sh i cheng, SHA Zhim in, HE P ing (M inistry of AgricultureK ey Laboratory of Crop N utrition and Fertilization/ Institute of AgriculturalR esources and R egionalP lanning, C ineseA cad emy of Agricultural S ciences, B eij ing 100081, C ina) Abstract: The field expermi ents w ere conducted to investigate the effects of different nitrogen( N) fertilizer rates and the ratio of basalN and topdressingN onw interw heat growth, grain yield and the change of soilN content in Hengshu i and X inj,i Hebei province, respectively. The resu lts show that indigenous N supp ly could meet the demand ofN forw interw heat normal grow th before the revival stage, and the applied N fertilizerdo not sign ificantly increase wheat grain yield inH engshui site, w hile comparedw ith the treatm ents of applying basalN and topdressing N, the app lications of topdressingN only at shooting and booting stages at the ratio of21 increaseN use efficiency significantly. InX inji site, N 60 kg /ha cou ld meet the demand ofN forwheat grow th before the shooting stage, all N are applied as topdressing at the shooting stage do not elmi inate the effect ofN deficient at the early growth stage on wheat grow th and h igh grain yield, and the app lication of N 240 kg/ha at the r