大针茅和贝加尔针茅营养生长和生殖生长特性分析  

Analysis of reproductive and nutritive growth characteristics of Stipa grandis and Stipa baicalensis

作　　者：白丹[1,2] 张卓[3] 周婵[1,2] 杨允菲[4] 

机构地区：[1]呼伦贝尔草原生态系统国家野外科学观测研究站,北京100081 [2]辽宁大学生命科学院,辽宁沈阳110036 [3]沈阳大学生物与环境工程学院,辽宁沈阳110044 [4]东北师范大学草地研究所植被生态科学教育部重点实验室,吉林长春130024

出　　处：《草原与草坪》2011年第4期1-4,共4页Grassland and Turf

基　　金：国家自然科学基金项目(30900117;30770397;30960261);呼伦贝尔草原生态系统国家野外科学观测研究站开放课题(2010-09);辽宁省教育厅科研项目计划(L2010149);沈阳市人才资源开发专项资金;辽宁大学"211工程"三期建设项目-现代生物技术与东北种质资源开发利用项目资助

摘　　要：在呼伦贝尔草原观测试验站对针茅优势种群采用随机取样法进行了大针茅和贝加尔针茅生殖分蘖株的营养生长和生殖生长的数量特征研究。结果表明，大针茅和贝加尔针茅营养和生殖生长特性指标的变异系数变化为6．90％～77．60％；贝加尔针茅有性生殖特征，以及营养生长特征，分别是它的1．056-4．327倍；方差分析表明，贝加尔针茅与大针茅的营养和生殖生长特性之间差异显著或极显著。贝加尔针茅投入到有性生殖和营养生长的资源大于大针茅，具有更强的营养生长和有性生殖的能力，保证植株的正常生长和繁殖。Quantity characteristics of reproductive and nutritive growth of Stipa grandis and S. baicalensis were studied in the dominant stipa population of Hulunber prairie with random sampling method. The results showed that the variation coefficient of vegetative and reproductive characteristics ranged from 6.9 % to 77.6% for S. grandis and S. baicalensis respectively. The indices of sexual reproduction characteristics of S. baicalensis such as number of spikelet per spike, number of floret per spike, spike weight, the grain number per panicle, seed weight per spike, reproductive allocation II , and nutritive growth characteristics such as plant weight, stream weight,scabbard weight,total leaf weight were greater than those of S. grandis. And these indices were 1. 056 to 4. 327 times more than those of S. grandis. Variance analysis indicated that nutritive and reproductive characteristics were significantly different between S. grandis and S. baicalensis. S. baicalensis inputted more resources to sexual reproduction and vegetative growth than S. grandis. And S. baicalensis has stronger capability of vegetative growth and sexual reproduction to ensure the growth and propagation.

关 键 词：大针茅 贝加尔针茅 生殖生长 营养生长 数量分析 

分 类 号：Q945[生物学—植物学]