不同栽培模式及施氮对半旱地冬小麦_夏玉米氮素累积_分配及氮肥利用率的影响.pdfVIP

2011, 17( 1): 1- 8 PlantNutrition and Fertilizer Science / * 张 宏, 周建斌 , 刘瑞, 张 鹏, 郑险峰, 李生秀 (, 712100) : , : , ; , , ; , 2 2 ; , (N 120 kg/hm N 240 kg/hm ) ; ,, ; , : ; ; ; : S51. 062. 01 : : 1008- 505X( 2011) 01-0001-08 Effects of different cultivation patterns and nitrogen fertilizer on accumulation, distribution and use efficiency of nitrogen in winter wheat/ summ er maize rotation system on sem -i dryland farm ing * ZH NG Hong, ZHOU Jian-bin , LIU Rui, ZH NG Peng, ZHENG X ian-feng, LI Sheng-xiu (College of R esources and Environm ent Sciences, N orthw estA F University, Yang ling, Shaan i712100, Ch ina) Abstract: field expermi entwas conducted in the Guanzhong region ofShaanxiProvince to study the effectsof di-f ferent cultivation patterns and N fertilization on the accumulation, partition and use efficiency of N in m aize and w interwheat rotation. The results showed that the furrow planting pattern significantly increased theN accumulation in maize during itsmature stage, whereas other cultivation patterns had no significant effects on theN accumulation in themaize and wheat. D ifferent cultivation patterns had significant effect on the N accumulation in leaves of wheat, whilehad no effects on other organsofm aize andwheat. The contribution ofN from differentorgans to grain increased in the order: furrow planting conventional straw mulching water-controlled. pplying N fertilizer ( including N 120 kg/ha andN 240 kg/ha) increased the N accumulation in the crop in comparison w ith the con- tro.l TheN accumulation in treatment ofN 240 kg/hawas significantly higher than that ofN 120 kg/ha treatmen