不同龄组马尾松人工林土壤表层与团聚体碳氮磷储量变化  

Changes of Carbon,Nitrogen and Phosphorus Storage of Soil Surface and Aggregates in Different Age Groups of Pinus massoniana Plantation

作　　者：石燕 武燕 王娑娑 杨燕 丁波 SHI Yan;WU Yan;WANG Suosuo;YANG Yan;DING Bo(College of Biological Sciences,Guizhou Normal University,Guiyang 550018,China)

机构地区：[1]贵州师范学院生物科学学院,贵州贵阳550018

出　　处：《黑龙江农业科学》2023年第5期57-61,共5页Heilongjiang Agricultural Sciences

基　　金：贵州省科学技术厅基础研究计划(黔科合基础[2023]282号);贵州省农业科技攻关资助项目(黔科合支撑[2017]2520-2);贵州师范学院大学生创新创业训练计划项目(202214223002)。

摘　　要：为促进马尾松人工林土壤养分评价和可持续发展,以西南喀斯特地区不同龄组(中龄林、近熟林、成过熟林)马尾松人工林土壤团聚体为研究对象,分析0~20 cm土层土壤团聚体碳氮磷储量的变化,并探讨其与土壤碳氮磷储量的关系。结果表明,不同龄组之间,马尾松人工林土壤碳氮磷储量的变化趋势均为近熟林>成过熟林>中龄林,林龄对土壤碳氮储量影响显著。随着林龄的增长,黏粉粒氮储量逐渐升高,黏粉粒中成过熟林氮储量比中龄林显著增加了43.40%。土壤大团聚体磷储量随着林龄的增长表现出先升高后降低的趋势,近熟林显著高于成过熟林18.21%。土壤全氮储量与大团聚体全氮储量、土壤全磷储量与大团聚体、微团聚体和黏粉粒全磷储量均存在显著正相关关系。林龄对马尾松人工林土壤黏粉粒全氮储量、大团聚体全磷储量影响显著,而团聚体磷储量受土壤磷储量影响较大,对马尾松人工林经营管理可适当施加磷肥并注重对近熟林的管护。In order to promote soil nutrient evaluation and sustainable development of Pinus massoniana plantation,the soil aggregates of Pinus massoniana plantation in different age groups(middle-aged forest,near-mature forest,mature and over-mature forest)in Karst Area of southwest China were studied.The changes of soil aggregate carbon,nitrogen and phosphorus storage in 0-20 cm soil layer were analyzed,and their relationship with soil carbon,nitrogen and phosphorus storage were discussed.The results showed that among different age groups,the variation trend of soil carbon,nitrogen and phosphorus storage in Pinus massoniana plantation was near-mature forest>mature and over-mature forest>middle-aged forest,and forest age had a significant effect on soil carbon and nitrogen storage.With the increase of forest age,the nitrogen storage of clay silt increased gradually,and th e nitrogen storage of mature and over-mature forest in clay silt increased significantly by 43.40%compared with that of middle-aged forest.The phosphorus storage of soil macroaggregates increased first and then decreased with the increase of forest age,and the phosphorus storage of near-mature forest was significantly higher than that of mature and over-mature forest by 18.21%.There was a significant positive correlation between soil total nitrogen storage and total nitrogen storage of macroaggregates,soil total phosphorus storage and total phosphorus storage of macroaggregates,microaggregates and clay silt.It is concluded that forest age has a significant effect on the total nitrogen storage of soil clay silt and the total phosphorus storage of macroaggregates in Pinus massoniana plantation,while the phosphorus storage of macroaggregates is greatly affected by soil phosphorus storage.Phosphorus fertilizer can be appropriately applied to the management of Pinus massoniana plantation and attention should be paid to the management and protection of near-mature forest.

关 键 词：马尾松人工林 土壤团聚体 碳氮磷储量 林龄 

分 类 号：S714.2[农业科学—林学]