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《Journal of Sichuan Agricultural University》 2007-01
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Studies on Soil Characteristics of Different Stand Densities of Eucalyptus grandis+grass Compound Patterns at Initial Stage

WU Wei-guo1,HU Ting-xing1,ZHOU Chao-bin1,LI Jin-feng1,ZENG Xiao-dong2 (1.College of Forestry and Horticulture,Sichuan Agricultural University,Yaan 625014,Sichuan,China;2.Leshan Forestry Bureau,Leshan 614000,Sichuan,China)  
The experiment was conducted in three Eucalyptus grandis+grass compound planting patterns which have five different densities.Three patterns were E.grandis+Dactylis glomerata L.(pattern Ⅰ),E.grandis+Festuca arundinacea Schreb.(pattern Ⅱ),E.grandis+Hemarthria compressa(L.f) R.BY.(pattern Ⅲ).Soil characteristics of the compound planting patterns were studied.The primary results showed as follows: The soil physical properties(bulk density,non-capillary porosity and the total porosity) were improved to a certain degree.The account of soil organic matter had comparable trends among the three patterns and the order of the account of soil organic matter was MayNovemberAugust.The order of hydrolysis nitrogen was AugusMayNovember.The orders of available P and K were MayAugustNovember.The difference of the soil available nutrients among the three compound planting patterns was significant(P0.05).The forest densities did not show obvious effect,for the research was carried out at the initial stage of E.grandis+grass compound pattern.Integrating with the soil nutrient dynamics and the related research,the model Ⅲ [E.grandis+Hemarthria compressa(L.f) R.BY.] is more appropriate for the district.
【Fund】: 国家“十五”科技攻关项目“四川盆周低山丘陵区水土流失综合治理技术与示范”(项目编号:2004BA606A-06);; 四川省教育厅应用基础项目“区域人工林基础生态学过程及调控研究”(项目编号:2005A011)。
【CateGory Index】: S714
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