Effects of Monoculture and Mixed-sown Grasses on Soil Physicochemical Properties and Microbial Biomass

doi:10.11733/j.issn.1007-0435.2024.07.008

Acta Agrestia Sinica ›› 2024, Vol. 32 ›› Issue (7): 2072-2080.DOI: 10.11733/j.issn.1007-0435.2024.07.008

Effects of Monoculture and Mixed-sown Grasses on Soil Physicochemical Properties and Microbial Biomass

Adihaze^1,4, CHANG Tao^1,4, SU Hong-ye^1,4, WEI Jing-jing^1,2, QIN Rui-min^1,4, HU Xue^1,4, MA Li¹, ZHANG Zhong-hua¹, SHI Zheng-chen^1,4, LI Shan¹, YUAN Fang¹, LI Hong-lin^1,3, ZHOU Hua-kun¹

1. Qinghai Provincial Key Laboratory of Cold Regions Restoration Ecology, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai Province 810008, China;
2. College of Geography Science, Qinghai Normal University, Xining, Qinghai Province 810016, China;
3. College of Eco-Environmental Engineering, Qinghai University, Xining, Qinghai Province 810016, China;
4. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2023-11-08 Revised:2024-01-15 Published:2024-08-03

单播和混播禾草对土壤理化性质和微生物生物量的影响

阿的哈则^1,4, 常涛^1,4, 苏洪烨^1,4, 魏晶晶^1,2, 秦瑞敏^1,4, 胡雪^1,4, 马丽¹, 张中华¹, 史正晨^1,4, 李珊¹, 袁访¹, 李宏林^1,3, 周华坤¹

1. 中国科学院西北高原生物研究所, 青海省恢复生态学重点实验室, 青海西宁 810008;
2. 青海师范大学, 青海西宁 810016;
3. 青海大学, 青海西宁 810016;
4. 中国科学院大学, 北京 100049

通讯作者: 周华坤，E-mail:hkzhou@nwipb.cas.cn
作者简介:阿的哈则(1997-)，男，彝族，四川冕宁人，硕士研究生，主要从事恢复生态学研究，E-mail：2548414897@qq.com
基金资助:
国家自然科学基金联合基金项目(U21A20186)；青海省自然科学基金创新团队项目(2021-ZJ-902)；第二次青藏高原综合科学考察研究项目(2019QZKK0302-02)资助

Abstract

Abstract: In order to investigate the effects of different sowing methods on degraded alpine grasslands,the restoration effects of alpine grasslands under single sown of Elymus nutans, mixed-sown of Elymus nutans and Poa pratensis,and mixed-sown of Elymus nutans,Poa pratensis and Elymus sibircus were investigated. The results showed that plant biomass,soil primary nutrients and water content were the highest in the Elymus nutans + Poa pratensis mixed-sown treatment. Soil organic carbon,total nitrogen and total phosphorus contents were the highest in the Elymus nutans + Poa pratensis + Elymus sibircus ley mixed-sown treatment,and the soil pH value was 6.91,which was favourable for plant growth. Microbial biomass carbon,nitrogen and phosphorus contents were highest in this mixed-sown treatment. Correlation and redundancy analyses showed that microbial biomass was negatively correlated with soil water content and total potassium content,and positively correlated with other soil physicochemical properties. In summary,the study concluded that the mixed-sown treatment of Elymus nutans + Poa pratensis + Elymus sibircus was the best choice for sowing grass mixtures in degraded alpine meadows. However,a longer period of observation and research is needed to draw more precise conclusions.

Key words: Sanjiangyuan, Artificial planting, Grass mixture, Microbial biomass

摘要： 为探究不同播种方式对退化高寒草地的影响，本试验研究了垂穗披碱草(Elymus nutans)单播，垂穗披碱草与草地早熟禾(Poa pratensis)混播，以及垂穗披碱草、草地早熟禾、多叶老芒麦(Elymus sibircus)混播下高寒草地的恢复效果。结果显示，垂穗披碱草+草地早熟禾人工草地的植物生物量、土壤速效养分含量和含水率最高；垂穗披碱草+草地早熟禾+多叶老芒麦人工草地的土壤有机碳、全氮和全磷含量最高，且土壤pH值为6.91，有利于植物生长，在该混播人工草地中，微生物生物量碳氮磷含量最高；相关分析和冗余分析表明，微生物生物量与土壤含水率和全钾含量呈负相关关系，与其他土壤理化性质呈正相关关系。综上，本研究认为在退化高寒草地进行禾草混播时，垂穗披碱草+草地早熟禾+多叶老芒麦的混播方式可能是最佳选择。然而，为了得出更准确的结论需要进行更长时间的观测和研究。

关键词: 三江源, 人工建植, 禾草混播, 微生物生物量

CLC Number:

Q949.71+4.2

Adihaze, CHANG Tao, SU Hong-ye, WEI Jing-jing, QIN Rui-min, HU Xue, MA Li, ZHANG Zhong-hua, SHI Zheng-chen, LI Shan, YUAN Fang, LI Hong-lin, ZHOU Hua-kun. Effects of Monoculture and Mixed-sown Grasses on Soil Physicochemical Properties and Microbial Biomass[J]. Acta Agrestia Sinica, 2024, 32(7): 2072-2080.

阿的哈则, 常涛, 苏洪烨, 魏晶晶, 秦瑞敏, 胡雪, 马丽, 张中华, 史正晨, 李珊, 袁访, 李宏林, 周华坤. 单播和混播禾草对土壤理化性质和微生物生物量的影响[J]. 草地学报, 2024, 32(7): 2072-2080.

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Effects of Monoculture and Mixed-sown Grasses on Soil Physicochemical Properties and Microbial Biomass

单播和混播禾草对土壤理化性质和微生物生物量的影响

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