草业科学2016，Vol.33Issue(5)：963-971,9.DOI:10.11829/j.issn.1001-0629.2015-0600
宁夏荒漠草原植物群落特征对不同轮牧开始时间的响应
Effect of different rotational grazing start time on plant community characteristics in desert steppe in Ningxia
摘要
Abstract
The reasonable rotational grazing start time had important effects on scientific utilization of desert steppe.In the present paper,plant community characteristics and edible forage nutrients of desert steppe in Ningxia with different rotational grazing start times were studied.The results showed that rotational grazing start time had little influence on species composition of desert steppe after two years of grazing.The plant den-sity in grassland with early rotational grazing was higher than that in grassland with late start rotational graz-ing,however,the coverage and aboveground biomass had opposite performance.With the delay of rotational grazing start time,the important value of Stipa breviflora,Lespedeza potaninii,Leymus secalinus and Con-rolulus ammannii increased,whereas that of Cleistogenes squarrosa decreased,Cynanchum komarovii has no significant difference in different start rotational grazing times.The density,coverage and aboveground biomass of above species had different response to rotational grazing start time.Rotational grazing improved plant spe-cies diversity.The plant species dominance of late rotational grazing region was lower than that of early rota-tional grazing region,however,the uniformity and diversity had opposite performance.With the delay of rota-tional grazing start time,animal feed rate and forage crude protein content gradually decreased and crude fiber content increased.These results suggested that rotational grazing with fixed time and sequence will increase the heterogeneity of grassland vegetation so that the rotational grazing time and sequence should have appropriate adj ustments based on vegetation conditions.关键词
荒漠草原/轮牧时间/植物群落/牧草养分Key words
desert steppe/rotational grazing time/plant community/forage nutrient分类
农业科技引用本文复制引用
秦建蓉,马红彬,王丽,虎巧能,沈艳,许冬梅..宁夏荒漠草原植物群落特征对不同轮牧开始时间的响应[J].草业科学,2016,33(5):963-971,9.基金项目
宁夏回族自治区科技支撑重大专项(2012) （2012）
中国科学院“西部之光”人才培养引进计划项目(XAB2015A10) （XAB2015A10）
