学术
尖叶胡枝子和达乌里胡枝子地上生物量累积研究
孙启忠[1] 玉柱[2] 徐丽君[1,3] 赵淑芬[4] 张志茹[1]
[1]中国农业科学院草原研究所,内蒙古呼和浩特010010 [2]中国农业大学草地研究所,北京100094 [3]中国农业科学院研究生院,北京100081 [4]内蒙古赤峰市林西县草原站,内蒙古林西025250
摘 要:
通过对尖叶胡枝子和达乌里胡枝子地上生物量累积研究表明，2种胡枝子地上生物量积累过程划分为缓慢生长前期、快速生长期和缓慢生长后期3个阶段；2种胡枝子地上生物量的垂直分布近似于菱形，基部和顶部生物量小，而中部生物量大；从枝条结构变化看，尖叶胡枝子枝条以中细枝（直径φ≤1．9mm）为主，达乌里胡枝子则以粗中枝（φ≥1．0mm）为主；从枝条垂直分布结构来看，2种胡枝子最佳利用时期是在开花期到结实期之间。[著者文摘]
文章出处:
《干旱区研究》-2008年25卷1期 -82-89页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1001-4675（2008）01-0082-08
Study on the Accumulation of Aboveground Biomass of Lespedeza hedysaroides and L. davurica
SUN Qi-zhong, YU Zhu , XU Li-jun , ZHAO Shu-fen, ZHANG Zhi-ru（ 1. Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Huhhot 010010, China; 2. Institute of Grassland Research. China Agricultural University, Beijing 100094, China; 3. Graduate School, Chinese Academy of Agricultural Sciences, Beijing 100081 , China; 4. Station of Grassland Work, Linxi County, Chifeng City, Inner Mongolia 025250, China ）
Abstract:
In this paper, the accumulation of aboveground biomass of Lespedeza hedysaroides and L. davurica is lucubrated. The results show that the hiomass accumulation of these two Lespedeza species can be divided into three stages, i.e. the slow growth stage, rapid growth stage and slow growth-harvest stage. After the two Lespedeza species turn green, the biomass accumulation is slow because the air temperature is still low, the severe invasion of cold air current occurs frequently, and drought occur sometimes; the biomass accumulation of these species increases rapidly, and the daily biomass accumulation increases to the maximum with the increase of air temperature and rainfall after July; and then the two Lespedeza species come into their autumn, and the biomass accumulation becomes slow again. The vertical distribution of the aboveground biomass of these species is diamond-shaped, that is the biomass is low at the base and top of the plants but high at the middle section. The branch structure of the two Lespedeza species reveals that the fine branches （φ≤1.9mm） ofL. hedysaroides are dominant, whereas the thick branches （φ≥1.0 mm） of L. davurica are donlinant. The vertical distribution structure of the branches reveals that the optinlum utilization period of these two Lespedeza species is from anthesis to fruiting stage.[著者文摘]
Key words:
Lespedeza hedysaroides ; L. davurica ; biomass; branch structure
基金资助:
“十一五”国家科技支撑项目“优质草产品生产加工与高效利用关键技术研究”（2006BAD16B03）;“奶牛优质饲草生产技术研究及开发”（2006BAD04A04-06）项目
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