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冶河灌区农田土壤水分与硝态氮分布规律研究

标题: 冶河灌区农田土壤水分与硝态氮分布规律研究
英文标题: Distribution of Soil Moisture and Nitrate Nitrogen in Yehe Irrigation District of Hebei Province
作者: 高惠嫣,杨路华,申佩佩,刘卉,马文超
英文作者: GAO Hui-yan,YANG Lu-hua,SHEN Pei-pei,LIU Hui,MA Wen-chao
出版时间: 2015-01-01
机构: 河北农业大学
关键词: 渠灌区,土壤水,硝态氮,运移规律,地下水,田间试验
英文关键词: canal irrigation district,soil moisture,nitrate nitrogen,transport rule,groundwater,field experiment
刊名: 节水灌溉
英文刊名: Water Saving Irrigation
卷号: 4
基金: 河北省自然科学基金
页码: 5
摘要: "为分析农业生产对农业生态系统和地下水环境的影响,2012-2013年在冶河灌区开展小麦、玉米轮作区农田土壤含水率和硝态氮田间试验,同时对地下水位和水质进行了监测。通过分析试验数据,结果表明:小麦、玉米轮作周期0~300 cm土层范围内,土壤含水率变化呈X型。计划灌水定额相同,不同地块灌溉引起土壤含水率明显变化的土层深度不同,其原因是主要受土壤初始含水率和土壤空间异质性的影响;小麦、玉米轮作周期0~300 cm土层范围内,土壤剖面硝态氮含量变化呈单调递减曲线。2013年3月土壤硝态氮累积量最高,2013年5月硝态氮的淋洗量最大。在地下水位埋深8~9 m ,灌水量为900~1200 m3/hm2时,硝态氮运移主要发生在耕层土壤,施肥和降水是土壤硝态氮向深层土壤淋洗、地下水质变化的主要影响因素。"
英文摘要: "The experiments on soil moisture and nitrate nitrogen were conducted in wheat-corn field in Yehe irrigation district from the year of 2012 to 2013 in order to analyze the effect of agricultural production on agricultural ecosystem and groundwater environ‐ment .Groundwater level and quality were observed in the same time .The experiment results show that nitrate nitrogen content shows “X” shape in 0~300 cm soil profile during the wheat-maize rotation period .Under the identical irrigation quota condition ,soil depths under which soil moisture changes significantly are different because of the influences of the initial soil water content and soil spatial heterogeneity .Nitrate nitrogen content varies in monotone decline curve in 0~300 cm soil profile during the wheat-maize ro‐tation period .The cumulative amount and leaching amount of nitrate nitrogen reach the maximum value in March and May ,respec‐tively .When groundwater depth is about 8~9 m and irrigation quota is 900~1 200 m3/hm2 ,the nitrate nitrogen transport occurs mainly in 0~100 cm soil depth ,and fertilization and precipitation are the main factors influencing the groundwater quality and soil nitrate leaching ."