辽西北风沙区典型人工防护林土壤微生物群落功能特征

生态学杂志

辽西北风沙区典型人工防护林土壤微生物群落功能特征

张岩^1,2,邓娇娇^1,2,朱文旭^1,2,殷有^1,2,魏亚伟^1,2,周永斌^1,2*

(¹沈阳农业大学林学院, 沈阳 110161; 2中国森林生态系统监测网络辽宁辽河平原森林生态系统定位研究站, 辽宁昌图 112500)

出版日期:2019-06-10 发布日期:2019-06-10

Functional characteristics of soil microbial community of the typical artificial shelter forests in the windy-sandy region of northwest Liaoning Province, China.

ZHANG Yan^1,2, DENG Jiao-jiao^1,2, ZHU Wen-xu^1,2, YIN You^1,2, WEI Ya-wei^1,2, ZHOU Yong-bin^1,2*

(¹College of Forestry, Shenyang Agricultural University, Shenyang 110161, China; ²Research Station of LiaoheRiver Plain Forest Ecosystem, Chinese Forest Ecosystem Research Network, Changtu 112500, Liaoning, China).

Online:2019-06-10 Published:2019-06-10

摘要/Abstract

摘要： 运用Biolog-Eco技术对辽西北风沙区樟子松人工林、油松人工林、杨树人工林的土壤微生物群落功能特征进行研究，同时测定土壤化学特性，探究该地区不同树种人工防护林土壤微生物群落的代谢活性和功能特征及其与土壤化学特性的相关性。结果表明，与樟子松和油松人工林相比，杨树人工林能显著提高土壤pH、土壤可溶性有机碳和速效磷含量，降低土壤C/N。该地区不同人工防护林的土壤微生物群落代谢活性差异显著，对碳源的利用能力(AWCD)依次为杨树人工林>樟子松人工林>油松人工林，杨树人工林土壤微生物的Shannon指数、Simpson指数和McIntosh指数分别为3.27、0.96和8.13，均显著高于樟子松和油松人工林(P<0.05)。不同人工防护林土壤微生物对六大碳源的利用存在差异，其中杨树人工林对六大碳源的利用率均显著高于樟子松和油松人工林(P<0.05)。主成分分析和聚类分析表明，针叶树种(油松和樟子松)和阔叶树种(杨树)人工林下的土壤微生物分属两个不同的功能类群，起分异作用的碳源主要包括丙酮酸甲酯、i赤藓糖醇、2羟基苯甲酸。土壤pH、可溶性有机碳、C/N、速效磷是影响微生物群落AWCD值、Shannon指数、Simpson指数、McIntosh指数的主要因素。综上所述，该地区杨树人工林土壤微生物群落的代谢活性和功能多样性都优于油松人工林和樟子松人工林，应保持杨树人工林种植。

关键词: 小麦, 氮素, 养分循环, 养分平衡

Abstract: We analyzed functional characteristics of soil microbial community in three typical artificial shelter forests, including Pinus sylvestrisvar. mongolica, Pinus tabuliformis and Populus×canadensisin the windysandy region of northwest Liaoning Province, China, by Biolog-Eco method. Soil chemical properties were measured to explore their correlations with the metabolic activity and functional characteristics of soil microbial community. The results showed that compared with Pinus sylvestris var. ongolica and Pinus tabuliformis, Populus×canadensis had higher soil pH, dissolved organic C and available P concentrations, and lower C/N. There were significant differences in soil microbial community metabolic activities among different forests. The capacity of C source utilization by soil microbial communities (AWCD) was in the order of Populus×canadensisforest >Pinus sylvestrisvar. mongolica forest >Pinus tabuliformis forest. The Shannon diversity index, Simpson diversity index, and McIntosh diversity index of soil microbial community in the Populus×canadensis forest were 3.27, 0.96, and 8.13, respectively, and significantly higher than those ofPinus sylvestris var. mongolica and Pinus tabuliformisforests (P<0.05). There were significant differences in the utilization of the six types of carbon sources by soil microorganisms among different forests. The utilization rates of six carbon sources of Populus×canadensis forest were significantly higher than those of the other two forests (P<0.05). Results of principal component analysis and cluster analysis showed that soil microbial communities could be divided into two different functional groups, coniferous forests (Pinus) and broadleaf forest (Populus), characterized by different principal carbon sources including pyruvic acid methyl ester, i erythritol, and 2hydroxybenzoic acid. Soil pH, DOC, C/N and available P were the main factors affecting AWCD value, Shannon index, Simpson index and McIntosh index. In conclusion, the metabolic activities and functional diversity of soil microbial community in Populus×canadensis plantation were better than those in P. tabuliformis and P. sylvestris var.mongolica plantations. The plantation of Populus×canadensis is suitable for this region.

Key words: wheat, nitrogen, nutrient cycling, nutrient balance.

张岩,邓娇娇,朱文旭,殷有,魏亚伟,周永斌. 辽西北风沙区典型人工防护林土壤微生物群落功能特征[J]. 生态学杂志.

ZHANG Yan, DENG Jiao-jiao, ZHU Wen-xu, YIN You, WEI Ya-wei, ZHOU Yong-bin. Functional characteristics of soil microbial community of the typical artificial shelter forests in the windy-sandy region of northwest Liaoning Province, China.[J]. cje.

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