学术
荒漠草地物种多样性的水分特征研究
徐海量[1,2] 乔木[1] 艾合买提·那尤溥[1] 周生斌[1] 刘嫦娥[2] 孙重久[2]
[1]中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011 [2]新疆农业大学草业科学系,新疆乌鲁木齐830052
摘 要:
通过在伊犁河谷山前倾斜平原荒漠草地开展的不同灌溉量草地恢复试验，对测试的试验地内草地植物物种多样性指数和灌溉水量之间的关系进行了初步的研究。结果显示：在荒漠草地，水分是影响草地植物长势的重要限制因子，随着水分条件的转好，植被盖度和蒿类的分盖度均有显著的提高，草地植物的生物量和群丛高度均显著增加；随着灌溉量的增加，Simpson指数、Shannon—Wiener指数、Pielou指数和Margalef指数均出现递增的趋势，其中每增加1kg／d水量，Simpson指数将增加0．021，表明在温性荒漠草原生物多样性指数对水量变化的灵敏度较高。[著者文摘]
文章出处:
《干旱地区农业研究》-2006年24卷2期 -105-109页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-7601（2006）02-0105-05
Water characteristics of plant diversity in temperate desert grassland
Xu Hai-liang ,QIA0 Mu ,Aihmt·nayoup,ZH0U Sheng-bin,LIU Cheng-ge,SUN Chong-jiu（1. Xinjiang Institute of Ecology and Geography, CAS ,Urumqi , 830011 ,China ;2. Institute of Partacultural science, Xinjiang Agricultural University, Urumqi, 830052, China）
Abstract:
Base on the grassland restoration experiment in Yili pith plain, this article studied the relationship between the plant community diversity and the irrigation volume. The results showed; the water volume was the important factor in determining the vegetation growth in desert grassland ; the vegetation coverage and Seriphidium transillense coverage were obviously improved when the irrigation volume was increased, and the grass yield and average plant height were distincty increased too. Furthermore,all of the Simpson index, Shannon-Wiener index, Pielou index and Margalf index tended to be increased when the irrigational volume was added. By calculation, it was found that the Simpson index increased 0. 021 when the irrigation volume added 1 kg/d. Therefore, in temperate desert grassland. the plant diversity index is sensitive to water volume[著者文摘]
Key words:
desert grassland; plant community diversity;water characteristic
基金资助:
国家自然科学基金（30470329）;新疆维吾尔自治区计委伊犁林业科技生态示范项目.
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