黄河三角洲盐碱地不同混交林土壤可溶性有机碳氮的研究  

Dissolved Organic Carbon and Nitrogen in Different Mixed Forest Stands in Saline Land of Yellow River Delta

作　　者：陈印平[1] 夏江宝[1] 曹建波[2] 王进闯[3] 

机构地区：[1]滨州学院山东省黄河三角洲生态环境重点实验室,山东滨州256603 [2]滨州学院,山东滨州256603 [3]中国科学院成都生物研究所,四川成都610041

出　　处：《水土保持通报》2013年第5期87-91,104,共6页Bulletin of Soil and Water Conservation

基　　金：国家"十一五"科技支撑计划课题"盐碱地改良沿海防护林体系研究与示范"(2009BADB2B05);山东省中青年科研奖励基金"黄河三角洲盐碱耕地土壤碳氮周转对盐胁迫的响应机制"(2011BSHZ001);山东省高校科研发展计划项目"黄河三角洲退化人工刺槐林CNP化学计量特征"(J13LE58);滨州学院青年基金项目"沾化冬枣种植区土壤氮矿化研究(BZXYKJ0818)

摘　　要：对黄河三角洲盐碱地刺槐纯林、刺槐+白蜡、刺槐+白榆和刺槐+臭椿混交林土壤可溶性有机碳(DOC)和土壤可溶性氮(TNS)进行了研究。结果表明,4种人工林中,腐殖质层DOC和TSN含量显著大于0—20和20—40cm层土壤。刺槐+臭椿混交林的DOC含量最高,为257.70mg/kg。另外,总氮(TN)和TSN含量分别为1 065.79和55.80mg/kg,均显著高于其他三种林型。各层土壤DOC和TSN含量由高到底的顺序依次为:刺槐+臭椿混交林>刺槐+白榆混交林>刺槐纯林>刺槐+白蜡混交林。相关分析结果表明,土壤DOC和TSN与土壤的全氮、有效磷、速效钾和含盐量相关性显著。The contents of soil dissolved organic carbon（DOC） in Robinia pseudoacacia, Robinia pseudoaca cia ＋ Fraxinus chinensis mixed forest, Robinia pseudoacacia ＋ Ulmus pumila mixed forest, and Robinia pseudoacacia ＋ Ailanthus altissima mixed forest in saline land of the Yellow River Delta were studied. Among the four forest patterns, the DOC and dissolved organic N（TSN） in soil humus had significantly higher contents than those in the 0 20 and 2040 cm soil layers, and the highest content of the DOC was founded in Robinia pseudoacacia ＋ Ailanthus altissima mixed forest（257. 70 mg/kg）. In addition, the contents of total N（TN） and the TSN in Robinia pseudoacacia ＋ Ailanthus altissima mixed forest were 1 065.79 and 55.80 mg/kg, respectively. Soil contents of the DOC and TSN in the four forest patterns were showed as the order of Robinia pseudoacacia ＋Ulmus pumila Robinia pseudoacacia ＋Ailanthus altissima stand Robinia pseudoacacia stand Robinia pseudoacacia ＋Fraxinus chinensis. The DOC and TSN were significantly correlated with TN, available P, available K and salinity.

关 键 词：黄河三角洲 混交林 可溶性有机碳 可溶性氮 

分 类 号：S153.6[农业科学—土壤学]