3种胡枝子根系生长特性及根干重的研究  

Study on the root growth characteristic and biomass of 3 Lespedeza species

作　　者：赵淑芬 孙启忠[2] 丛培明 李艳华 

机构地区：[1]内蒙古林西县草原工作站,内蒙古林西025250 [2]中国农业科学院草原研究所,内蒙古呼和浩特010010 [3]内蒙古林西县林西镇动检站,内蒙古林西025250

出　　处：《草原与草坪》2008年第3期17-20,共4页Grassland and Turf

基　　金："十一五"国家科技支撑项目(2006BAD16B03)资助

摘　　要：对3种胡枝子的根干重及根系生长特征的研究结果表明，尖叶胡枝子，达乌里胡枝子和二色胡枝子具有较大的根干重，在100cm的土层范围内分别达到3472．05，3060．07和8795．66kg／hm^2，根系以粗、中根为主；根干重主要集中在0～20cm的耕作层中，分别占总根量的77．73％，72．289／5和89．02oA；30～50cm的土层中细根占较大比例，分别达到42．91％～5．35％，86．09％～95．41％和71．91％～93．6％。The root biomass and growth characteristic of 3 Lespedeza species were studied and the results showed that the root biomass of 3 species were 3 472.05（Lespedeza hedysaroides）, 3 060.07 （L. davurica） and 8 795.66 kg/hm^2（L, bicolor） within 100 cm respectively. Most of roots distributed within 0 to 20 cm and accounted for 77.73% ,72.28% and 89.02% respectively. The most fiber roots distributed within 30 cm to 50 cm and accounted for 42. 91% to 5.35%,86.09% to 95.41% and 71.91% to 93. 6% for 3 species.

关 键 词：胡枝子 根系 生长特征 根干重 

分 类 号：Q948.1[生物学—植物学]