摘要
以海狮苏丹草(Sorghum sudanense)为材料研究在留茬5、10、15cm条件下,其植株高度、分蘖及单位面积产量等的动态变化情况,并通过构造一年生苏丹草刈割株高生长线性模型来分析其单作群落植物个体生长情况与整体生物量的关系。结果表明,在一个生长周期内,不同刈割区海狮苏丹草单作群落的总生物量在一定范围内达到相对稳定状态;不同刈割时期内植株个体生长速率与生长潜力呈显著负相关,表明苏丹草单作群落个体有通过平衡自身生长速率与生长潜力的关系使群落总生物量在一定范围内维持相对稳定状态的倾向。
A mowing height growth linear model was established in the present paper. Based on the model, the relationship between growth status of individual plants, including dynamic changes of individual plant height, tillering and per unit yield, and total biomass of Sorghum sudanense （Hay-King） with different cutting treatments was analyzed. The results showed that unit yields of monocropping grassland of S. sudanense （Hay-King） with different cutting treatments were stable in its growth cycle. There was a significant negative correlation between plant individual growth rate and growth potential under different cutting treatments. These results indicated that the monocropping grassland of S. sudanense （Hay-King） has ability to maintain unit yields with a certain stability during its life span through balancing the relation- ship between the growth rate and the growing potential of individuals.
出处
《草业科学》
CAS
CSCD
北大核心
2012年第11期1765-1770,共6页
Pratacultural Science
基金
国家"十二五"科技支撑计划项目(2010BAE00739)
国家现代农业产业技术体系建设专项资金(CARS-39)
关键词
苏丹草
生物量
株高
单株分蘖数
Sorghum sudanense
biomass
plant height
tillering number per plant
