摘要
为探索砒砂岩与沙的最佳混合比例,使其大规模应用于毛乌素沙地土地整治,发展农业种植,防止地下水污染。本文进行了不同比例的砒砂岩与沙复配土种植玉米的小区试验,在玉米生长期采集不同深度的土壤测其铵态氮和硝态氮含量,对不同混合比例下复配土的氮素淋失特性进行研究。结果表明:(1)铵态氮含量在各混合比例的复配土中较低,均在2.5mg/kg以下,未出现累积情况;(2)砒砂岩与沙在不同的混合比例下均存在硝态氮淋失;(3)砒砂岩与沙混合比例为1∶2时,硝态氮主要累积在0-40cm,且无机氮累积量最高,其玉米产量高达9 900kg/hm2。对种植玉米而言,推荐采用1∶2的砒砂岩与沙混合比例进行推广开发。
This study was aimed to explore the best mixing ratio ot Ieldspathic sandstone and sand for large- scale land remediation in the Mu Us Sand Land, developing of agricultural cultivation, the different proportions of the feldspathic sandstone and sand mixed to plant corn in field experiment. Ammonium and nitrate content of soils at different depths in the corn growing season were measured to study different proportions with soil nitrogen leaching characteristics. The results showed that： （1）NH4＋ --N content in the soil of each mixing ratio was lower than 2.5 mg/kg and had not cumulated. （2）All mixing ratio of feldspathic sandstone had nitrogen leaching. （3）When ratio of feldspathic sandstone and sand was 1 ： 2, the NO3-- N almost accumulated in the 0--40 cm soil layers, the accumulation of inorganic nitrogen was more than another mixed soil, and the corn production reached to 9 900 kg/hm2. Therefore, the mixing ratio of fieldspathic sandstone and sand（1 ： 2） was recommended to promote development for planting corn.
出处
《水土保持学报》
CSCD
北大核心
2013年第4期58-61,66,共5页
Journal of Soil and Water Conservation
基金
陕西省科技新星计划项目(2011KJXX60)
陕西省农业攻关计划项目(2012K01-34)
关键词
复配土
砒砂岩
沙
铵态氮
硝态氮
compound soil
feldspathic sandstone
sand
NH4＋-N
NO3--N
