干旱区生态环境知识资源中心(Arid): 宁夏荒漠草原植物群落特征对不同轮牧开始时间的响应

Arid

	宁夏荒漠草原植物群落特征对不同轮牧开始时间的响应
其他题名	Effect of different rotational grazing start time on plant community characteristics in desert steppe in Ningxia
	秦建蓉 1; 马红彬 2; 王丽 1; 虎巧能 1; 沈艳 2; 许冬梅 2
来源期刊	草业科学
ISSN	1001-0629
出版年	2016
卷号	33 期号:5 页码:963-971
中文摘要	合理的轮牧开始时间对科学利用荒漠草原具有重要意义。以宁夏荒漠草原为对象,对不同轮牧开始时间下植物群落特征和可食牧草养分含量进行了研究。结果表明,1)经过两年放牧,轮牧开始时间对植物物种组成影响较小;轮牧开始早的草地植物密度高于晚轮牧草地,但盖度和地上生物量相反。2)随轮牧开始时间推后,短花针茅(Stipa breviflora) 、牛枝子(Lespedeza potanini)、赖草(Leymus secalinus)、银灰旋花(Conrolulus ammannii)等主要植物的重要值升高,隐子草(Cleistogenes squarrosa)则呈相反趋势,老瓜头(Cynanchum komarovii)变化规律不明显;这几种植物的密度、盖度和地上生物量对轮牧开始时间响应不同。3)轮牧增加了植物物种多样性,晚开始轮牧草地植物物种优势度较早开始草地低,但均匀度和Shannon-Wiener多样性指数增加。4)随轮牧开始时间推后,草地采食率和牧草粗蛋白含量下降。研究认为,固定时间和顺序的轮牧方式会使草地植被异质性增加,应根据植被状况对轮牧时间作适当调整,年度间小区要以不同顺序进行轮牧。
英文摘要	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 density in grassland with early rotational grazing was higher than that in grassland with late start rotational grazing, 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 Conrolulus 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 species diversity.The plant species dominance of late rotational grazing region was lower than that of early rotational grazing region,however,the uniformity and diversity had opposite performance.With the delay of rotational 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 adjustments based on vegetation conditions.
中文关键词	荒漠草原 ; 轮牧时间 ; 植物群落 ; 牧草养分
英文关键词	desert steppe rotational grazing time plant community forage nutrient
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY ; PLANT SCIENCES
WOS研究方向	Agriculture ; Plant Sciences
CSCD记录号	CSCD:5717033
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233981
作者单位	1.宁夏大学农学院草业科学研究所, 银川, 宁夏 750021, 中国; 2.宁夏大学农学院草业科学研究所, 西北土地退化与生态恢复国家重点实验室培育基地, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	秦建蓉,马红彬,王丽,等. 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]. 宁夏大学,2016,33(5):963-971.
APA	秦建蓉,马红彬,王丽,虎巧能,沈艳,&许冬梅.(2016).宁夏荒漠草原植物群落特征对不同轮牧开始时间的响应.草业科学,33(5),963-971.
MLA	秦建蓉,et al."宁夏荒漠草原植物群落特征对不同轮牧开始时间的响应".草业科学 33.5(2016):963-971.