太行山山前平原冬小麦生长季硝态氮的淋失研究

Leaching loss of nitrate during the wheat growing season in Piedmont of Mountain Taihang

摘要: 试验研究太行山山前平原冬小麦生长季NO₃^--N淋失结果表明，该区现有灌溉施肥制度冬小麦生长季存在NO₃^--N的淋失，且主要发生在底墒水和返青水灌溉时期。整个冬小麦生长季施N水平为lOOkg/hm²、200kg／hm²和400kg／hm² 时，通过180cm土层界面的N0₃^--N淋失量分别为0．1kg／hm²、22．1kg／hm² 和110．1kg／hm²。

Abstract: The leaching loss of N0₃^--N during wheat growing season in Piedmont Mountain Taihang are studied in this paper．The results show that there are lots of N0₃^--N leached during the wheat growing season in Piedmont of Mountain hang for the over fertilization and improper irrigation．The nitrate leaching through 180cm soil depth are 0．1kg／hm²，22．1kg／hm²，and110．1kg／hm² inwheat season with N 100kg／hm²，200kg／hm²，and400kg／hm² treatments，the irrigation before wheat plan ting and the first irrigation in the next year eauses lots of nitrate leached．