]*>","")" /> Space Distribution Characteristic of Soil Available Nitrogen Under Film Trickle Irrigation in Cotton Field in Xiniang
Xinjiang Agricultural Sciences

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Space Distribution Characteristic of Soil Available Nitrogen Under Film Trickle Irrigation in Cotton Field in Xiniang

JIANG Yi-juan;ZHANG De-ming;Lü Shuang-qing;LIU Wei-yang;WANG Jia-qiang   

  • Received:2007-06-25 Revised:2007-06-25 Online:2007-06-25 Published:2007-06-25

新疆膜下滴灌棉田土壤有效态氮空间分布特征

姜益娟;郑德明;吕双庆;柳维杨;王家强   

  1. 塔里木大学植物科技学院,新疆阿拉尔,843300





摘要： 棉花膜下滴灌条件下的棉田土壤碱解氮、铵态氮含量变化是,0～10 cm土层与滴灌带垂直水平方向0～75 cm 变化波动最大,其次是10～20 cm土层,20～60 cm变化比较小.硝态氮含量的水平变化有所不同,0～60 cm各层土壤变化均较大;棉花各生育时期土壤垂直向下0～60 cm土层碱解氮含量和盛花期铵态氮含量,由上向下呈比较均匀的直线递减变化,硝态氮含量是0～10 cm土层比10 cm以下高出1倍多,呈陡减变化趋势;膜下滴灌棉田土壤碱解氮含量随棉花生育进程逐渐下降,但在棉花生长发育的整个过程中始终保持在63～81 mg/kg较高水平,这是新疆获得大面积棉花高产的重要原因之一.