| 放牧对小叶锦鸡儿种群数量特征的影响 |
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| 引用本文： | 王立红,王悦,王德凯,解李娜,马成仓.放牧对小叶锦鸡儿种群数量特征的影响[J].草业科学,2018,35(4):800-806. |
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| 作者姓名： | 王立红 王悦 王德凯 解李娜 马成仓 |
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| 作者单位： | 天津市动植物抗性重点实验室 天津师范大学生命科学学院,天津,300387;天津市动植物抗性重点实验室 天津师范大学生命科学学院,天津,300387;天津市动植物抗性重点实验室 天津师范大学生命科学学院,天津,300387;天津市动植物抗性重点实验室 天津师范大学生命科学学院,天津,300387;天津市动植物抗性重点实验室 天津师范大学生命科学学院,天津,300387 |
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| 基金项目： | 国家自然科学基金——内蒙古草原锦鸡儿属重要物种的有性繁殖及其对气候干旱梯度和放牧管理的响应(31570453)，国家自然科学基金——狭叶锦鸡儿的繁殖对策沿着气候干旱梯度的变异及其生态意义(31170381) |
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| 摘 要： | 本研究通过测定禁牧(CK)、轻度放牧(LG)、中度放牧(MG)和重度放牧(HG)下小叶锦鸡儿(Caragana microphylla)种群总盖度、密度、高度和总生物量,旨在掌握放牧对小叶锦鸡儿种群数量特征的影响。结果表明:随着放牧强度的增加,小叶锦鸡儿灌丛密度呈现先增加后减少的趋势,但各处理间无显著差异(P=0.11)。这说明中度放牧在一定程度上有利于小叶锦鸡儿的繁殖。灌丛盖度、高度和总生物量随着放牧强度的增加而显著降低(P0.05),这说明放牧对灌木种群有明显的负作用。综合考虑小叶锦鸡儿种群的数量特征和生产力,在荒漠草原上适宜的载畜率应为中度放牧。
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| 关 键 词： | 放牧 小叶锦鸡儿 灌丛 盖度 高度 总生物量 密度 |
Effect of grazing on quantitative characteristics of Caragana microphylla population |
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| Wang Li-hong,Wang Yue,Wang De-kai,Xie Li-na,Ma Cheng-cang.Effect of grazing on quantitative characteristics of Caragana microphylla population[J].Pratacultural Science,2018,35(4):800-806. |
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| Authors: | Wang Li-hong Wang Yue Wang De-kai Xie Li-na Ma Cheng-cang |
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| Abstract: | To understand the effect of grazing on the quantitative characteristics of Caragana microphylla pop-ulation,we investigated the shrub cover,density,height,and total biomass of C.microphylla under non-graz-ing,light-grazing,moderate-grazing,and heavy-grazing treatments.The results showed that with increase in grazing intensity,the density of the C.microphylla shrub increased initially,and then decreased;however, there was no significant difference among the different treatments (P=0.1 1),suggesting,to some extent,that moderate grazing benefitted the reproduction of C.microphylla.Contrastingly,grazing significantly reduced the shrub cover,height,and total biomass of C.microphylla (P<0.05),suggesting that grazing had an obvi-ous negative effect on the shrub.Based on the quantitative characteristics of C.microphylla population under different grazing treatments,we suggested that moderate grazing intensity should be moderate-intensity grazing in desert steppes |
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