CAJ | 학술논문

针对围场红松洼国家级自然保护区核心区枯死物大量积累的现状,按枯死物的自然存在状况设置了1因素(枯死物因素)3水平(完全去除枯死物,留茬5 cm,自然状态CK)的随机实验,并分别于2007、2008年7月进行样方调查,就枯死物对以多年生植物为主的山地草甸植物群落的影响及其作用机制进行研究,以期为保护区的科学管理提供理论基础.结果表明:在实验期内,自然状态下枯死物的存在对红松洼山地草甸植物群落的物种数、盖度以及地上生物量影响显著(P＜0.05),在留茬5 cm时达到最大值,而对植物群落高度没有显著影响;植物群落组成分析表明, 去除枯死物提高了植物群落中豆科(Leguminosae)、禾本科(Gramineae)和菊科(Compositae)植物的比重,降低了杂类草植物所占比重; 而自然状态下,莎草科(Cyperaceae)和杂类草植物的重要值达到峰值;草甸植物群落的Shannon-Wiener多样性指数和Simpson优势度指数同时表明留茬5cm有利于植物多样性的维持.
침대위장홍송와국가급자연보호구핵심구고사물대량적루적현상,안고사물적자연존재상황설치료1인소(고사물인소)3수평(완전거제고사물,류치5 cm,자연상태CK)적수궤실험,병분별우2007、2008년7월진행양방조사,취고사물대이다년생식물위주적산지초전식물군락적영향급기작용궤제진행연구,이기위보호구적과학관리제공이론기출.결과표명:재실험기내,자연상태하고사물적존재대홍송와산지초전식물군락적물충수、개도이급지상생물량영향현저(P＜0.05),재류치5 cm시체도최대치,이대식물군락고도몰유현저영향;식물군락조성분석표명, 거제고사물제고료식물군락중두과(Leguminosae)、화본과(Gramineae)화국과(Compositae)식물적비중,강저료잡류초식물소점비중; 이자연상태하,사초과(Cyperaceae)화잡류초식물적중요치체도봉치;초전식물군락적Shannon-Wiener다양성지수화Simpson우세도지수동시표명류치5cm유리우식물다양성적유지.
The core area of Hebei Weichang Hongsongwa Natural Reserve had been enclosed for more than ten years. As all disturbing activities from human and livestock were forbidden, more and more litter was accumulated and had a significant effect on the plant reviving and seedling establishment. In order to provide the theoretical basis for the scientific management of the nature reserve, a single-factorial field random experiment with three litter layer levels (complete litter removal, 5cm stubble height, no litter removal as CK) was carried out to investigate the effect and its mechanism of litter layer on perennial plant community of mountain meadow using quadrat survey method in July of 2007 and 2008 in the core area. The results indicate that litter layer significantly affected the number of species, coverage, and aboveground biomass of plant communities and peak values showed under 5 cm stubble height treatment. But there was no significant effect on height of plant community. Results of plant community component analysis show that removal of litter layer increased the plant percentage of Leguminosae, Gramineae, and Compositae and decreased the proportion of other herbs. The percentage of Cyperaceae and other herbs showed a peak value under CK treatment. The Shannon-Wiener index and Simpson index of mountain meadow plant community together indicate that 5cm stubble height treatment would be beneficial to the maintenance of biological diversity.