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川南不同林龄马尾松人工林土壤磷素变化特征 被引量:7

Soil Phosphorus Variation of Masson Pine Plantation in Southern Sichuan
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摘要 以宜宾市高县8个不同林龄马尾松人工林为研究对象.采用空间替代时间的研究方法.对各林龄不同形态磷质量分教及其随林龄的变化特征、不同林龄和不同土层间磷素质量分数的差异性、不同土层磷质量分数与土壤理化性质的相关性进行研究,结果表明:各林龄土壤全磷质量分数及其对应不同土层质量分数均大于1g.kg-1,处于较高水平,而速效磷质量分数表现为亏缺;随着林龄的增长,马尾松人工林土壤全磷和速效磷呈波状变化,在3、14和40a表现出极大值;全磷和速效磷在0—20cm质量分数均高于20~40cm,且不同土层土壤速效磷的质量分数差异性极显著(p〈0.01);不同林龄间土壤全磷和速效磷质量分数差异性显著:相关性分析表明不同土层全磷、速效磷质量分数与有机质显著相关(p〈0.05),0—20cm土层全磷、速效磷质量分数与pH值也显著相关(p〈O.05).20~40cm土层全磷和速效磷与有机质和oH值的相关性不显著。 With eight different stand ages of Masson pine plantation in Gao County of Yibin, we studied the different forms of P content and its variation with stand ages, differences of soil Pontent among different stand ages and soil layers, and correla- tion between soil P content and other soil properties by the method of space for time. P contents of total and different soil layers are more than 1 g kg-1 at a high level, but the available P is deficient. With the stand age growth, soil total P and available P are changing as wave and appear the maximas in 3, 14, and 40 year-old Pinus massoniana plantation. Further- more, the total P and available P in 0-20 em are more than those in 20-40 cm, and appear significant differences among different stand ages. The significant correlation is between soil available P and soil organic matter at 0.05. There is a sig- nificant correlation between soil total P, available P content and pH in soil of 0-20 cm. Whereas, there is no significant correlation between soil total P and available P in 20-40 cm.
出处 《东北林业大学学报》 CAS CSCD 北大核心 2014年第6期63-67,113,共6页 Journal of Northeast Forestry University
基金 "十二五"国家科技支撑计划重大项目(2011BAC09B05) 四川农业大学创新团队项目资助
关键词 马尾松人工林 不同林龄 土壤磷素 变化特征 Masson pine plantation Different stand age Soil phosphorus Variation characteristics
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