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首页> 外文期刊>Bulgarian Journal of Agricultural Science >IMPACT OF DIFFERENT COVER ESTABLISHMENT TYPES AND GRAZING ON SPECIES RICHNESS AND COMPOSITION OF PASTURES ON FORMER ARABLE LAND
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IMPACT OF DIFFERENT COVER ESTABLISHMENT TYPES AND GRAZING ON SPECIES RICHNESS AND COMPOSITION OF PASTURES ON FORMER ARABLE LAND

机译：不同耕作方式和放牧对原耕地物种丰富度和草地组成的影响

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摘要

The impact of different cover establishment types (involving either sown grass-cover mixture containing several species or one sown species) and grazing management on the botanical composition and the species richness of grassland were observed in submontane pastures located in South Bohemia, Czech Republic. Whereas one part of the observed area (HD part) was resown with a grass-clover mixture (6 grass species and 3 clover species), the other (LD part) was sown with oat undersown by ryegrass and after oat harvest, the area has retained spontaneous grassing. The cover of the herb layer, the number of species, and cover of both sown and unsown species were observed in transect of 5 permanent plots in the HD and LD part of the pasture between 2008 and2011. After a 10-year grazing regime, the El cover was equal in both parts; however, there was a statistically significant increase in the number of species in the LD part, by 4 species on average. Of 84 species that were recorded in total, 51 species were to be found in both locations; moreover, the HD part contained 10 additional species whereas the LD part featured 23 more species. The HD part was dominated by one expressive unsown species, Dactylis glomerata; the sown species significantly reduced the cover and some of them completely disappeared. The LD part was dominated by several species: in addition to Dactylis glomerata also Lolium perene, Agrostis capillaris. Trifolium repens and Poa trivilias. Botanical composition and species richness wereinflunced more by the type of cover establishment (32% of all data variability) than the grazing (5% of all data variability).
机译：在捷克共和国南波西米亚的山地牧场上，观察到了不同的覆盖设施类型（涉及包含数种或一种播种的播种草皮混合物）和放牧管理对植物组成和草原物种丰富度的影响。观察区域的一部分（HD部分）用草-三叶草混合物（6种草种和3种三叶草种）播种，另一部分（LD部分）用黑麦草播种的燕麦播种，收获后的面积为保留自然发草。在2008年至2011年之间，在牧场的HD和LD部分的5个永久性样地的横断面上观察到了草本层的覆盖，种数以及播种和未播种的覆盖。经过10年的放牧制度，两方面的El覆盖率均相等。但是，LD部分物种的数量统计上显着增加，平均增加了4种。在总共记录的84个物种中，两个地点都发现了51种。此外，HD部分还包含10种，而LD部分则具有23种。 HD部分主要由一种未播种的表达种，Dactylis glomerata;播种会大大减少覆盖率，其中一些会完全消失。 LD部分由几种物种主导：除了小球藻之外，还包括黑麦草，黑毛草（Agrostis capillaris）。白三叶和Poa trivilias。植物组成和物种丰富度受覆盖结构类型（占所有数据可变性的32％）的影响大于放牧（占所有数据可变性的5％）的影响。

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