[1]YI Liang,LI Kai-rong,ZHANG Guang-hua,et al.Research on Soil Nutrients Characteristics of Economic Forest in Weibei Loess Plateau[J].Research of Soil and Water Conservation,2009,16(02):186-190.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
16
Number of periods:
2009 02
Page number:
186-190
Column:
Public date:
2009-04-20
- Title:
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Research on Soil Nutrients Characteristics of Economic Forest in Weibei Loess Plateau
- Author(s):
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YI Liang, LI Kai-rong, ZHANG Guang-hua, TANG Rong-hua
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College of Resources and Environment, Northwest A & F University, Yangling, Shanxi, 712100, China
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- Keywords:
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Weibei Loess Plateau; economic forest; soil nutrients
- CLC:
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S727.3;S714.8
- DOI:
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- Abstract:
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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.