黄河三角洲长期人工林地对土壤有机碳库的影响  

Effects of Long-term Plantations on Soil Organic Carbon Pool in Yellow River Delta

作　　者：杜振宇[1] 董海凤 井大炜[3] 马丙尧[1] 刘方春[1] 

机构地区：[1]山东省林业科学研究院,山东济南250014 [2]中农立华生物科技股份有限公司,北京100052 [3]德州学院,山东德州253023

出　　处：《水土保持通报》2016年第5期56-61,68,共6页Bulletin of Soil and Water Conservation

基　　金：公益性行业科研专项经费项目"滨海湿地生态系统服务功能与评估技术研究"(201404305);山东省科技发展计划项目(2010GNC10942)

摘　　要：[目的]探讨黄河三角洲长期人工林对盐碱土壤有机碳库的作用效果,为充分发挥其生态功能与经济效益提供科学依据与技术参考。[方法]以刺槐、白蜡、白榆和臭椿纯林以及刺槐—白蜡、刺槐—白榆和刺槐—臭椿混交林等近30a的7个长期人工林为研究对象,并分别设置标准池,采用多点混合采样法,研究土壤活性有机碳、碳库管理指数的变化规律。[结果]3个混交林地土壤的微生物量碳含量较高,并显著高于其他林地,其中刺槐—白蜡混交林较未造林荒地、刺槐、白蜡、白榆和臭椿纯林分别提高26.16%,17.62%,88.41%,47.99%和21.64%。与未造林荒地相比,长期人工林地的水溶性有机碳含量均明显升高,而在各个不同造林措施中,刺槐—白蜡混交林的水溶性有机碳含量显著高于其他措施。各人工林地较荒地均显著提高了土壤总有机碳含量,其中3种混交林模式的土壤总有机碳含量明显高于对应纯林;同时,林地土壤不同活性有机碳含量的总体变化规律为:惰活性有机碳>中活性有机碳>高活性有机碳,其中刺槐—白蜡混交林更利于惰性有机碳的积累。此外,各人工林地土壤碳库指数较未造林荒地明显上升,其中刺槐—白蜡混交林的碳库管理指数达最高值,与刺槐—白榆、刺槐—臭椿混交林无显著性差异,但分别较刺槐、白蜡、白榆和臭椿纯林明显高出46.51,34.88,27.55,33.38。[结论]混交林模式较纯林对林地土壤有机碳库的改善效果更显著,对土壤具有较好的培肥作用,并处于良性管理状态,有利于林木的生长发育。[Objective] The objective of this study is to explore the effects of long-term plantations on organic carbon pool in the saline-alkali soil of the Yellow River delta, in order to provide the scientific basis and technical reference for giving full play to its ecological functions and economic benefits.[Methods] Four pure plantations of Robinia pseudoacacia, Fraxinus chinensis, Ulmus pumila and Ailanthus altissima, and three mixed plantations were selected as the research objects. The change characteristics of active organic carbon and carbon pool management index in different plantations soil were studied. Standard pool was set and multipoint mixed sampling method was used.[Results] The microbial biomass carbon contents in three mixed plantations were significantly higher than that in the other forest land. The microbial biomass carbon content in R.pseudoacacia and F.chinensis mixed plantation was 26.16%, 17.62%, 88.41%, 47.99% and 21.64% higher than that in increases in wasteland, and three pure plantations of R.pseudoacacia, F.chinensis, U. pumila and A. altissima, respectively. In comparison with wasteland, the dissolved organic carbon（DOC） contents in different plantations increased greatly, while the DOC content was apparently higher in mixed plantation of R.pseudoacacia. and F.chinensis than that in other plantations. Compared with wasteland, the total organic carbon （TOC） contents in different plantations increased significantly, which were observably higher in mixed plantations than that in corresponding pure plantations. In addition, the variation trends of different active organic carbon contents in forest land soils were as follows：low-active organic carbon 〉 mid-active organic carbon 〉 high-active organic carbon. The mixed plantation of R.pseudoacacia. and F.chinensis. was beneficial to the accumulation of low-active organic carbon. Additionally, the soil carbon pool indexes of plantations increased significantly in comparison to the wasteland. The carbon pool management index in mixed p

关 键 词：黄河三角洲 人工林 活性有机碳 碳库管理指数 

分 类 号：S727[农业科学—林木遗传育种]