昭通南方草地本地物种群落特征对耕耙与补播处理的响应

doi:10.11733/j.issn.1007-0435.2023.08.026

草地学报 ›› 2023, Vol. 31 ›› Issue (8): 2481-2489.DOI: 10.11733/j.issn.1007-0435.2023.08.026

昭通南方草地本地物种群落特征对耕耙与补播处理的响应

徐晓莹^1,3, 沈有信^1,2, 袁闯^1,3, 陈发军^1,3, 代文⁴

1. 中国科学院西双版纳热带植物园热带森林生态学重点实验室, 云南昆明 650223;
2. 中国科学院核心植物园, 云南勐仑 666303;
3. 中国科学院大学生命科学学院, 北京 100049;
4. 云南省昭通市永善县人民政府, 云南昭通 657307

收稿日期:2022-11-21 修回日期:2022-12-30 出版日期:2023-08-15 发布日期:2023-09-01
通讯作者: 沈有信,E-mail:yxshen@xtbg.ac.cn
作者简介:徐晓莹(1997-),女,汉族,广东揭阳人,硕士研究生,主要从事恢复生态研究,E-mail:x52790@126.com
基金资助:
中国科学院战略性先导科技专项:昭通南方草地恢复技术与优质牧草群落构建(XDA26020203-2)资助

Responses of Native Grass Communities to Tillage and Seed Sowing Treatments in Zhaotong, Southern China

XU Xiao-ying^1,3, SHEN You-xin^1,2, YUAN Chuan^1,3, CHEN Fa-jun^1,3, DAI Wen⁴

1. Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, Yunnan Province 650223, China;
2. Core Botanical Gardens, Chinese Academy of Sciences, Menglun, Yunnan Province 666303, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China;
4. The People's Government of Yongshan County, Zhaotong City, Yunnan Province, Zhaotong, Yunnan Province 657307, China

Received:2022-11-21 Revised:2022-12-30 Online:2023-08-15 Published:2023-09-01

摘要/Abstract

摘要： 为应对南方草地的退化与质量提升要求，大量的饲草物种被引入南方草地的退化改良与恢复中，与本地物种共同构成新的植物群落，但本地植物群落对饲草补播及其前期耕耙的响应尚不明确。本研究以云南昭通退化草地为对象，设置免耕补播、耕耙(不补播)、耕耙+补播三类处理，并利用二次饱和D-最优设计模型，在耕耙补播处理中布设14个处理的补播量梯度与配比试验。结果表明，耕耙显著降低群落多样性系数，改变了本土群落的组成，一年生物种占据优势;在耕耙后补播不同饲草组合，这种组成关系也未显著改变，且本地植物群落的多度、生物量和各群落多样性指数均未发生显著变化，但内部的物种关系发生了变化，群落联结性趋向负联结;免耕补播降低本土植物群落的多度和生物量，但差异不显著。上述结果可为昭通南方草地的退化恢复与质量提升提供理论依据。

关键词: 补播, 耕耙, 本地物种群落

Abstract: In response to the degradation and grassland quality improvement requirements in Southern China,a large number of seeds of forage species have been introduced into the process of grassland restoration and reconstruction,forming a mixed plant communities together with native species. Little was known about the response of native communities to different seed sowing and tillage before sowing. Taking the degraded grassland in Zhaotong,Yunnan as the object,three treatments:sowing,tillage,tillage+sowing were designed and implemented,a quadratic saturated D-optimal design model was applied to design the weight and ratio combinations of the two grass and one bean species. Thus,14 treatments with different species sowing combination were arranged to detect the response of the local community to different combinations of sowing species. The results showed that tillage significantly reduced the diversity coefficient and changed the composition of native communities,in which annual species predominated. Sowing forage seeds with different quantity or ratio after tillage,the composition of native community did not change significantly,as well the abundance,aboveground biomass and four diversity indexes;but the internal community connectivity tended to be negative. Sowing seeds without tillage reduced the abundance and aboveground biomass of native plant communities,but the difference was not significant. The above results could provide a theoretical basis for the restoration and quality improvement of grassland in Southern China.

Key words: Seed sowing, Tillage, Native plant community

中图分类号:

S812.5

徐晓莹, 沈有信, 袁闯, 陈发军, 代文. 昭通南方草地本地物种群落特征对耕耙与补播处理的响应[J]. 草地学报, 2023, 31(8): 2481-2489.

XU Xiao-ying, SHEN You-xin, YUAN Chuan, CHEN Fa-jun, DAI Wen. Responses of Native Grass Communities to Tillage and Seed Sowing Treatments in Zhaotong, Southern China[J]. Acta Agrestia Sinica, 2023, 31(8): 2481-2489.

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昭通南方草地本地物种群落特征对耕耙与补播处理的响应

Responses of Native Grass Communities to Tillage and Seed Sowing Treatments in Zhaotong, Southern China

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