不同管理措施对高寒草甸土壤微生物量的影响研究

doi:10.11686/cyxb2016055

草业学报 ›› 2016, Vol. 25 ›› Issue (12): 35-43.DOI: 10.11686/cyxb2016055

不同管理措施对高寒草甸土壤微生物量的影响研究

蒋永梅^{1, 2}, 姚拓^{1, 2*, *}, 李建宏^{1, 2}, 陈龙^{1, 2}, 刘欢^{1, 2}, 刘婷^{1, 2}, 田永亮^{1, 2}, 张标^{1, 2}, 高亚敏^{1, 2}

1.甘肃农业大学草业学院,甘肃兰州 730070;
2.草业生态系统教育部重点实验室,中-美草地畜牧业可持续发展研究中心,甘肃兰州 730070

收稿日期:2016-02-01 修回日期:2016-04-28 出版日期:2016-12-20 发布日期:2016-12-20
通讯作者: yaotuo@gsau.edu.cn
作者简介:蒋永梅(1990-),女,甘肃榆中人,在读硕士。E-mail:1073902068@qq.com
基金资助:
国家自然科学基金项目(30360584)资助

Effects of different management measures on soil microbial biomass in an alpine meadow

JIANG Yong-Mei^{1, 2}, YAO Tuo^{1, 2, *}, LI Jian-Hong^{1, 2}, CHEN Long^{1, 2}, LIU Huan^{1, 2}, LIU Ting^{1, 2}, TIAN Yong-Liang^{1, 2}, ZHANG Biao^{1, 2}, GAO Ya-Min^{1, 2}

1.Pratacultural College, Gansu Agricultural University, Lanzhou 730070, China;
2. Key Laboratory of Grassland Ecosystem, Ministry of Education, Sino-U.S. Centers for Grazing Land Ecosystem Sustainability, Lanzhou 730070, China

Received:2016-02-01 Revised:2016-04-28 Online:2016-12-20 Published:2016-12-20

摘要/Abstract

摘要： 采用氯仿熏蒸浸提法对玛曲高寒草甸4种管理措施(不围栏、围栏、围栏+施肥、围栏+补播)土壤微生物量碳(SMBC)、氮(SMBN)和磷(SMBP)连续4年(2011-2014年)变化动态进行研究,结果表明,1)同一年份,不同管理措施,相同空间层次,土壤微生物量表现为:围栏+补播>围栏+施肥>围栏>不围栏(0~20 cm)和围栏+施肥>围栏+补播>围栏>不围栏(20~40 cm);同一年份,相同管理措施,不同空间层次(0~20 cm,20~40 cm),土壤微生物量表现为0~20 cm>20~40 cm, 一般前者为后者的1.22~3.39倍。2)不同年份,相同管理措施,相同空间层次(0~20 cm,20~40 cm),除不围栏(0~20 cm)SMBC外,土壤微生物量年际变化表现为2011至2012年上升至最大值,之后下降;不同年份,相同管理措施,不同空间层次(0~20 cm,20~40 cm),0~20 cm土壤微生物量年际变化幅度大于20~40 cm。土壤微生物量与气温呈负相关关系,土壤微生物量与降水量呈显著正相关关系。运用综合指数法计算出不同管理措施下土壤质量综合指数,其值排序为:围栏+补播>围栏+施肥>围栏>不围栏。围栏+补播对土壤的改善效果明显优于其他3种措施,是玛曲高寒草甸生态恢复的重要途径。

Abstract: In this study, soil microbial biomass characteristics were monitored during 2011-2014 in Maqu alpine meadows under four different management strategies: non-fenced, enclosed, enclosed with fertilization, and enclosed and sowing. Soil microbial biomass carbon (SMBC), soil microbial biomass nitrogen (SMBN), and soil microbial biomass phosphorus (SMBP) were analyzed using the chloroform fumigation extraction method. The results showed that in the same year, the different management measures were ranked, from highest soil microbial biomass in the 0-20 cm soil layer to lowest, as follows: enclosed+sowing>enclosed+fertilization>enclosed>non-fenced, and from highest soil microbial biomass in the 20-40 cm soil layer to lowest, as follows: enclosed+fertilization>enclosed+sowing>enclosed>non-fenced. In the same year, soil microbial biomass in the 0-20 cm soil layer was always greater (1.22 to 3.39 times greater) than that in the 20-40 cm soil layer. With the same management measure and soil depth (0-20 cm or 20-40 cm), soil microbial biomass increased from 2011 to 2012, peaking in 2012 and decreased again afterwards, except for SMBC in the 0-20 cm soil layer in the non-fenced treatment. With the same management measures, the annual variation in soil microbial biomass in the 0-20 cm soil layer was greater than that in the 20-40 cm soil layer. The soil microbial biomass was negatively correlated with temperature, and significantly positively correlated with precipitation. The management measures were ranked, from highest soil quality composite index to lowest, as follows: enclosed+sowing>enclosed+fertilization>enclosed>non-fenced. The results showed that enclosure+sowing is a better soil management measure than the other three strategies for soil restoration and improvement. Consequently, enclosure+sowing should be applied for ecological restoration of Maqu alpine meadows.

蒋永梅, 姚拓, 李建宏, 陈龙, 刘欢, 刘婷, 田永亮, 张标, 高亚敏. 不同管理措施对高寒草甸土壤微生物量的影响研究[J]. 草业学报, 2016, 25(12): 35-43.

JIANG Yong-Mei, YAO Tuo, LI Jian-Hong, CHEN Long, LIU Huan, LIU Ting, TIAN Yong-Liang, ZHANG Biao, GAO Ya-Min. Effects of different management measures on soil microbial biomass in an alpine meadow[J]. Acta Prataculturae Sinica, 2016, 25(12): 35-43.

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不同管理措施对高寒草甸土壤微生物量的影响研究

Effects of different management measures on soil microbial biomass in an alpine meadow

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