学术
石羊河上游两种退化草地植物群落特征分析
林丽[1] 赵成章[1,2] 龙瑞军[3] 路远[4] 吕林有[1,5] 顾自福[6]
[1]甘肃农业大学草业学院,甘肃兰州730070 [2]西北师范大学地环学院,甘肃兰州730070 [3]兰州大学草地科技学院,甘肃兰州730000 [4]中国农科院兰州畜牧与兽药研究所,甘肃兰州730000 [5]辽宁省风沙地改良利用研究所,辽宁阜新123000 [6]甘肃省肃南裕固族自治县皇城区皇城绵羊育种场,甘肃皇城734400
摘 要:
采取分层取样法，对石羊河上游阿尔泰狗哇花十阿尔泰针茅型和火绒草十阿尔泰针茅型两种退化草地群落特征进行了分析。结果表明，（1）两种毒杂草型草地物种丰富度之间没有显著差异，但群落数量结构及群落成员型明显不同：阿尔泰狗哇花十阿尔泰针茅型草地中，阿尔泰狗哇花占优势地位，阿尔泰针茅次之；多年生杂类草盖度和植物量高于禾本科牧草；地下植物量自表层向下依次减小，且主要集中在0～20cm土层。火绒草十阿尔泰针茅型草地，火绒草占优势地位，阿尔泰针茅次之；地下植物量变化趋势同阿尔泰狗哇花十阿尔泰针茅型草地。（2）两种退化草地群落功能型发生明显变化，表现为禾草：杂类草比例与原生植被相比明显倒置。（3）两种退化草地总盖度略高于原生植物群落，差异不显著，但地上植物量明显高于原生植物群落。[著者文摘]
文章出处:
《草原与草坪》-2007年4期 -23-26页
栏目信息:
文献标识码:
A
文章编号:
1009-5500（2007）04-0023-04
Study on characteristics of two different degraded grassland communities in the upper Shiyang River
LIN Li , ZHAO Cheng-zhang, LONG Rui-jun, LU Yuan, LU Lin-you ,GU Zi-fu （1. College of Pratacultural Science ,Gansu Agricultural University ,Lanzhou 730070,China ; 2. College of Geography and Environment, Northwest Normal University ,Lanzhou 730070,China ; 3. College of Pastoral Agriculture Science and Technology ,Lanzhou University ,Lanzhou 730000,China; 4. Lanzhou Research institute of Animal Husbandry and Veterinary Medicine ,Lanzhou 734400,China; 5. Liaoning Institute of Sandy Land Improvement and Utilization, Fuxin 123000,China ;6. Hangcheng Sheep Breeding Farm ,Sunan 734400,China）
Abstract:
The differences between two types of degraded grassland （Heteropappus altaicus ＋ Stipa krylovii degraded grassland and Leontopotium leontopodioides＋Stipa krylovii were studied. The results showed that. （1） the function of the forbs was increased while S. krylovii decreased in each community. （2）There was no significant difference in the total underground phytomass between two degraded grasslands types, but the underground phytomass was different in each layer between the two communities; （3） There was no significant difference in total coverage,but the total aboveground phytomass was higher than the native vegetation community.[著者文摘]
Key words:
upper Shiyang River;degraded grassland;plant community characteristics
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