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松华坝库区土壤氮磷累积特征与流失风险研究
引用本文:刘芳,张乃明. 松华坝库区土壤氮磷累积特征与流失风险研究[J]. 水土保持通报, 2007, 27(3): 32-35
作者姓名:刘芳  张乃明
作者单位:云南农业大学,资源与环境学院,云南,昆明,650201
摘    要:分析了松华坝水库库区土壤的N,P累积特征。结果表明,(1)整个库区土壤(0—20 cm)全氮含量平均值为1.79 g/kg;NH4—N含量平均值为13.55 mg/kg;NO3—N含量平均值为7.29 mg/kg。全氮含量依次为:粮田>果园>菜地;NH4—N含量依次为:果园>粮田>菜地;NO3—N含量依次为:果园>菜地>粮田。(2)整个库区土壤(0—20 cm)全磷平均值为1.60 g/kg;速效磷含量平均值为10.36 mg/kg。全磷含量依次为:粮田>果园>菜地;速效磷含量依次为:菜地>粮田>果园。(3)入库河流的全N含量最初为Ⅱ类水,但是在入库口全N含量为Ⅴ类水。入库河流的全P含量最初为Ⅱ类水,全P含量最高为Ⅲ类水,入库口水质全P下降为Ⅲ类水。

关 键 词:松华坝      库区  土壤
文章编号:1000-288X(2007)03-0032-04
收稿时间:2006-09-06
修稿时间:2006-09-062006-10-17

Characteristics of Soil N and P Accumulation and Their Loss Risk in Songhuaba Reservoir
LIU Fang and ZHANG Nai-ming. Characteristics of Soil N and P Accumulation and Their Loss Risk in Songhuaba Reservoir[J]. Bulletin of Soil and Water Conservation, 2007, 27(3): 32-35
Authors:LIU Fang and ZHANG Nai-ming
Abstract:The N and P accumulation characteristics of soil in Songhuaba Reservoir are studied.Results show that the average content of total N of soil(0-20 cm) in the whole reservoir is 1.79 g/kg;NH4-N,13.55 mg/kg;and NO3-N,7.29 mg/kg.Landuses ranked from the high content of total N to the low are in turn the agricultural land,fruit land and vegetable land;NH4-N,in turn the fruit land,agricultural land and vegetable land;and NO3-N,in turn the fruit land,vegetable land and agricultural land.The average content of total P of soil(0-20 cm)is 1.60 g/kg,and available phosphate,10.36 mg/kg.Landuses ranked from the high content of total P to the low are in turn the agricultural land,fruit land and vegetable land;available phosphate,in turn the vegetable land,agricultural land and fruit land.The content of total N in the rivers entering the reservoir is in the 2nd grade,but falls into the 5th grade near the reservoir.The content of total P of the rivers is in the 2nd grade,and the highest content of total P is in the 3rd grade.However,the water quality falls into the 3rd grade near the reservoir.
Keywords:Songhuaba  nitrogen  phosphorus  reservoir  soil  
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