河北省典型保护地蔬菜土壤硝态氮的含量和分布  

NO_3^--N Content and Distribution of Soil under Protective Vegetable Culture

作　　者：张国印[1] 王丽英[1] 王凌[1] 耿暖[1] 孙世友[1] 茹淑华[1] 

机构地区：[1]河北省农林科学院农业环境与资源研究所,河北石家庄050051

出　　处：《河北农业情报》2004年第4期22-25,共4页

基　　金：河北省自然科学基金项目 (3 0 2 44 4)资助

摘　　要：调查了定州市和永年县蔬菜大棚和拱棚施肥情况 ,并采集土壤样品测定了土壤硝态氮含量。结果表明 ,蔬菜土壤硝态氮含量定州市平均比永年县高出 1 3 3～ 38 9mg/kg。表层土壤的硝态氮含量 ,定州市变化幅度 60～ 2 0 0mg/kg ,平均 94 2 5mg/kg ,永年县变化幅度为43 0～ 64 7mg/kg之间 ,平均 5 5 4mg/kg。保护地蔬菜土壤 0～ 1 0 0cm土层积累了大量的硝态氮。其中定州市蔬菜大棚土壤 1m土层内硝态氮含量平均为 80 7 0 6kg/hm2 ,永年县平均为430 32kg/hm2 ,均高于大田作物。容易造成土壤硝态氮积累和淋溶。Fertilization of vegetable production base in Dingzhou city and Yongnian country of Hebei province was surveyed. Soil samples of 0～160 cm soil layer were taken and the content of soil NO- 3-N were analyzed. The result indicated that the contents of soil NO- 3-N in Dingzhou were 13.3～38.9mg/kg higher than in Yongnian. In surface layer (0～20cm),the average content of NO- 3-N in Dingzhou was 94.25mg/kg. In Yongnian, the average content of NO- 3-N was 55.4mg/kg.In 0～100cm soil layer, a large amount of NO- 3-N was accumulated. In Dingzhou, the accumulated amount averaged 807.06kg/hm2N, and in Yongnian, 430.32kg/hm2N. Both were higher than for field crops and easy to create accumulation and leaching.

关 键 词：土壤硝态氮 保护地蔬菜 蔬菜大棚 大田作物 硝态氮含量 氮积累 集土 永年县 定州市 平均 

分 类 号：S513[农业科学—作物学] S641.1