吉林西部退化草地中羊草的生长率和异速生长关系的研究  

Research on Growth Rate and Allometric Relationship of Leymus chinensis in Degraded Grassland in Western Jilin Province

作　　者：赵一嬴 李月芬[1] 郭冬艳[1,2] 王冬艳[1] 李晴宇[1] 

机构地区：[1]吉林大学地球科学学院,吉林长春130061 [2]中国国土资源经济研究院,北京101149

出　　处：《安徽农业科学》2015年第24期206-208,共3页Journal of Anhui Agricultural Sciences

基　　金：吉林省自然科学基金项目(201215017)

摘　　要：利用吉林西部草地不同退化演替阶段中,羊草不同器官(根茎叶)生物量和各器官中C、N、P元素的数据,采用简化主轴回归方法验证生长率假说,并对异速生长关系进行。结果表明,随着草地退化演替的进行,在N、P元素限制下,吉林西部退化草地上生长的羊草不符合生长率假说。羊草茎中N、P呈显著的异速生长关系;羊草叶片中C、P以及N、P呈显著的异速生长关系,其余器官中C、N、P之间没有显著的相关关系。吉林西部退化草地中羊草的生长不符合3/4法则。Carbon, nitrogen and phosphorus contents of root, stem and leaf of each Leymus chinensis sample collected from western Jilin Prov- ince were tested. And this paper tempts to verify the growth rate hypothesis and study on heterauxesis by using major axis regression analysis. The results indicated that the growth of Leymus chinensis is not consistent with the growth rate hypothesis if the nitrogen and phosphorus ele- ments are limited,as the succession of grassland degradation. There is a significant allometric relationship between stem N and P content, leaf C and P content, leaf N and P content. There was no significant correlation between the rest of the organs of carbon, nitrogen and phosphorus content, which is inconsistent with the 3/4 power function.

关 键 词：生态化学计量学 绝对生长率 异速生长关系 碳氮磷 羊草 

分 类 号：S812.68[农业科学—草业科学] Q146[农业科学—畜牧学]