摘要
采用SRC(So il-R es in-Core)装置,研究了重庆市主要土壤类型的氮矿化差异以及与硝态氮淋溶的关系。研究结果表明,微酸性紫色土(菜地)的氮素矿化量、硝态氮淋失量和有效氮的变幅均较大,而其它两种坡耕地变化的氮素矿化量和硝态氮的淋失量变幅均较小。相关分析表明:在微酸性紫色土中,影响硝态氮淋失的主要因素是矿化量,且二者呈显著正相关;而其它两种坡耕地土壤的矿化量与硝态氮淋失量不表现相关性。这就表明不同土壤矿化、硝态氮淋失的情况有差异。
With soil-resin-core equipment, the difference of nitrogen mineralization and its correlation with NO3^- - N leaching were studied. Results indicated that large changes in N mineralization, nitrate leaching and available N were found in acid purple soil for vegetable cultivation, while N mineralization and nitrate leaching varied less in the other soil. Statistic analyses indicated that the content of N mineralization significantly influenced the amount of nitrate leaching in the acid purple soil. Significant correlations were observed between N mineralization and NO3^- -N losses while there did not exist correlation in the other two soil. The results indicated that N mineralization and nitrate leaching varied with different soil types.
出处
《水土保持学报》
CSCD
北大核心
2006年第1期80-82,107,共4页
Journal of Soil and Water Conservation
基金
重庆市环保局项目"三峡库区农田氮磷流失研究"资助(020822)
关键词
氮矿化
硝态氮
淋溶
nitrogen mineralization
nitrate nitrogen
leaching
