洮河上游紫果云杉群落土壤种子库特征及其与地上植被的关系
Q948.15+4; 该研究以甘肃洮河国家级自然保护区大峪沟林区(TH)、冶力关林区(YLG)、尕海-则岔国家级自然保护区则岔林区(GZ)的紫果云杉(Picea purpurea)天然林群落为研究对象,通过样地调查与萌发实验,分析洮河上游紫果云杉群落土壤种子库特征,以揭示洮河上游紫果云杉群落土壤种子库特征及与地上植被的关系,为紫果云杉群落恢复和管理提供依据.结果表明:(1)3个林区土壤种子库共萌发27科45属50种植物,种子库密度在958~1 129粒/m2之间,草本植物是构成研究区土壤种子库的主体.(2)3个林区紫果云杉群落土壤种子库垂直结构明显,物种数及种子密度随土层的加深呈减少趋势.(3...
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Published in: | 西北植物学报 Vol. 42; no. 4; pp. 705 - 714 |
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Format: | Journal Article |
Language: | Chinese |
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甘肃省白龙江林业科学研究所,兰州730070
2022
甘肃白龙江森林生态系统国家定位观测研究站,甘肃舟曲746300 |
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Abstract | Q948.15+4; 该研究以甘肃洮河国家级自然保护区大峪沟林区(TH)、冶力关林区(YLG)、尕海-则岔国家级自然保护区则岔林区(GZ)的紫果云杉(Picea purpurea)天然林群落为研究对象,通过样地调查与萌发实验,分析洮河上游紫果云杉群落土壤种子库特征,以揭示洮河上游紫果云杉群落土壤种子库特征及与地上植被的关系,为紫果云杉群落恢复和管理提供依据.结果表明:(1)3个林区土壤种子库共萌发27科45属50种植物,种子库密度在958~1 129粒/m2之间,草本植物是构成研究区土壤种子库的主体.(2)3个林区紫果云杉群落土壤种子库垂直结构明显,物种数及种子密度随土层的加深呈减少趋势.(3)3个林区地上植被物种数大于土壤种子库物种数,相似性系数在0.15~0.23之间,表现为极不相似性;土壤种子库的多样性指数除Pielou指数高于地上植被外,Margalef指数、Shannon-Wiener指数、Simpson指数均低于地上植被.研究认为,洮河上游紫果云杉群落土壤种子库以草本植物为主,乔木和灌木的储量较小,特别是建群种紫果云杉的储量较小;地上植被和土壤种子库之间相互的贡献力较低,仅依靠紫果云杉林土壤种子库进行自然恢复,远不能缓解现阶段紫果云杉林退化的问题,因此需开展人工育苗、造林等措施来促进紫果云杉的更新与发展. |
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AbstractList | Q948.15+4; 该研究以甘肃洮河国家级自然保护区大峪沟林区(TH)、冶力关林区(YLG)、尕海-则岔国家级自然保护区则岔林区(GZ)的紫果云杉(Picea purpurea)天然林群落为研究对象,通过样地调查与萌发实验,分析洮河上游紫果云杉群落土壤种子库特征,以揭示洮河上游紫果云杉群落土壤种子库特征及与地上植被的关系,为紫果云杉群落恢复和管理提供依据.结果表明:(1)3个林区土壤种子库共萌发27科45属50种植物,种子库密度在958~1 129粒/m2之间,草本植物是构成研究区土壤种子库的主体.(2)3个林区紫果云杉群落土壤种子库垂直结构明显,物种数及种子密度随土层的加深呈减少趋势.(3)3个林区地上植被物种数大于土壤种子库物种数,相似性系数在0.15~0.23之间,表现为极不相似性;土壤种子库的多样性指数除Pielou指数高于地上植被外,Margalef指数、Shannon-Wiener指数、Simpson指数均低于地上植被.研究认为,洮河上游紫果云杉群落土壤种子库以草本植物为主,乔木和灌木的储量较小,特别是建群种紫果云杉的储量较小;地上植被和土壤种子库之间相互的贡献力较低,仅依靠紫果云杉林土壤种子库进行自然恢复,远不能缓解现阶段紫果云杉林退化的问题,因此需开展人工育苗、造林等措施来促进紫果云杉的更新与发展. |
Author | 曹秀文 陈学龙 高本强 刘婷 李波 赵阳 |
AuthorAffiliation | 甘肃省白龙江林业科学研究所,兰州730070;甘肃白龙江森林生态系统国家定位观测研究站,甘肃舟曲746300 |
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Author_FL | LI Bo LIU Ting ZHAO Yang CHEN Xuelong GAO Benqiang CAO Xiuwen |
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Author_xml | – sequence: 1 fullname: 李波 – sequence: 2 fullname: 赵阳 – sequence: 3 fullname: 刘婷 – sequence: 4 fullname: 陈学龙 – sequence: 5 fullname: 高本强 – sequence: 6 fullname: 曹秀文 |
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Keywords | 洮河上游 土壤种子库 地上植被 紫果云杉 |
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Title | 洮河上游紫果云杉群落土壤种子库特征及其与地上植被的关系 |
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