【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。更多还原

【Abstract】 With soil-resin-core equipment,the difference of nitrogen mineralization and its correlation with NO^-₃-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 NO^-₃-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.更多还原