| 柠条不同种植密度对植物群落稳定性影响的研究 |
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| 引用本文： | 王占军,李生宝,蒋齐,潘占兵.柠条不同种植密度对植物群落稳定性影响的研究[J].四川草原,2006(10). |
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| 作者姓名： | 王占军 李生宝 蒋齐 潘占兵 |
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| 作者单位： | 宁夏农林科学院荒漠化治理研究所 宁夏银川750002 |
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| 摘 要： | 针对毛乌素沙地柠条不同种植密度对植物群落稳定性的影响,选择不同种植密度和自然恢复地进行研究对比,结果表明:自然恢复地以狗尾草、虫实、猪毛菜为主要优势种,建植柠条后,种植密度为1660丛/公顷的带间草本植物的重要值发生了很大的变化。多年生的植物种草木樨状黄芪、白草开始侵入并逐步成为优势种。种植密度为2490丛/公顷的带间草本植物则逐步演替为白草、沙蒿为主的植物群落。群落的植被盖度则以2490丛/公顷、1660丛/公顷的较高,分别达到了86.17%、80.33%,3330丛/公顷最低为64.17%,比自然恢复地低13.28%。通过对种植不同密度柠条林各样地群落种百分数与累积相对频度比值的计算,发现种植密度为2490丛/公顷、1660丛/公顷样地群落种百分数与累积相对频度比值最接近20/80的稳定点。可以看出随着柠条带间距的增加柠条带内的植物群落更加趋于稳定。
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| 关 键 词： | 毛乌素沙地 植物群落 稳定性 |
Research on Effect of Different Planting Density of Caragana on Stability of Plant Community |
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| WANG Zhan-jun,LI Sheng-bao,JIANG qi ,PANG Zhan-bing.Research on Effect of Different Planting Density of Caragana on Stability of Plant Community[J].Journal of Sichuan Grassland,2006(10). |
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| Authors: | WANG Zhan-jun LI Sheng-bao JIANG qi PANG Zhan-bing |
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| Institution: | WANG Zhan-jun1,LI Sheng-bao1,JIANG qi 1,PANG Zhan-bing1 |
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| Abstract: | As For the effect of Caragana different planting density on stability of plant community in Maowusu desert,compared sand resuming by planting Caragana of different density and naturally resuming.The results showed that Setaria viridis,Salsola ollina pall,Salsola collina were the major dominant species in naturally resuming.After planting Caragana,the important value of herbaceous plant in zone with planting density of 1 660 clusters/hm2 of Caragana had greatly changed.Perennial plant species Astragalus melilttoides Pall.,Pennisetum flaecidum began to invade and become dominant species.Major herbaceous plant in zone with density of 2 490 clusters/hm2 step by step was replaced by Pennisetum flaecidum and Artemisia arenaria.The vegetation coverage of sand with 2 490 clusters/hm2 and 1 660 clusters/ hm2 was higher,and reached 86.17% and 80.33% respectively;the lowest with 3 330 clusters/hm2 was 64.17% and lower 13.28% than natural recovery land.By calculating the percent and accumulated relative frequency ratio of plant community of sand planted Caragana with different density,discoveried the percent and accumulated relative frequency ratio of plant community of sand with planting density of 2 490 clusters/hm2 and 1 660 clusters/hm2 were most close to 20/80 point of safes.It can show that with the increase of planting space of Caragana,the plant community tend to be more stable. |
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| Keywords: | Maowusu sands Plant community Stability |
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