ZHANG Xue-pei,WANG Xiao-xian.Vertical Changes of Soil Moisture and Ecological Impacts in West Shanxi Loess Plateau[J].Research of Soil and Water Conservation,2009,16(02):200-204.
晋西黄土高原土壤水分垂直变化规律及生态影响
- Title:
- Vertical Changes of Soil Moisture and Ecological Impacts in West Shanxi Loess Plateau
- Keywords:
- soil; moisture; normal; distribution; correlation; analysis; SPSS
- 分类号:
- S152.7
- 摘要:
- 土壤水分是影响植被建设的重要因素,对晋西黄土高原土壤水分的统计属性以及从不同深度水分的拟合性作了研究,结果表明水分呈正态分布,且随深度增加湿度增加,分布更集中,不同深度土壤水分具有很高的拟合性,且随时间变化其变异具有一致性的关系.
- Abstract:
- Soil nutrients characteristics under four economic forest lands(Prunus armeniacia,Diospyros kaki,Zanthoxylum bungeanum,Juglans regia) were studied to better understand the soil nutrients status and change laws of economic forest land in Weibei Loess Plateau.The results showed that the variance range of soil nutrients content was wide,and amplitude of available nitrogen was the lowest and available phosphorous was the highest(74.2%).There were differences in soil nutrients among different economic forest lands.Zanthoxylum bungeanum land had the highest organic matter and available potassium content; Prunus armeniacia land took second place,Diospyros kaki and Juglans regia lands are the lowest.Available nitrogen content in the four economic forest lands decreased in the order:Juglans regia land>Zanthoxylum bungeanum land>Prunus armeniacia land>Diospyros kaki land,and available phosphorus changed in the order:Prunus armeniacia land>Diospyros kaki land>Zanthoxylum bungeanum land>Juglans regia land.Further more,soil nutrients in different layers of soil profile were significantly different,and top soil in the 0-20 cm layer had the highest contents.Nutrients contents decreased with the increase in profile depth,while the amplitude decreased simultaneously,and ’surface soil aggregation effect’ was obvious.There were correlations among nutrients contents.Organic matter was significantly correlated with available potassium(P<0.05) and available nitrogen(P<0.01).Available nitrogen significantly correlated with available potassium,while,available phosphorus poorly correlated with other nutrients and had no obvious law.According to the grading standard of soil nutrients on Loess Plateau,soil organic matter and available nitrogen contents in the investigated economic forest lands were at low level,but these lands were all rich in available potassium and available phosphorus and can meet requirements in tree growth.
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备注/Memo
收稿日期:2008-1-26;改回日期:。
基金项目:“973”国家重大基础研究计划项目(2002CB111503)
作者简介:王晓贤(1983- ),男,山西山阴人,硕士,研究方向:林业生态工程.E-mail:wangxiaoxian2005@126.com
通讯作者:张学培(1953- ),男,副教授,主要从事林业生态工程方面的研究.E-mail:zxp@bjfu.edu.cn