岩黄芪属3种固沙灌木或半灌木生物量蓄积特性研究  

Study on Biomass Accumulative Characteristics of 3 Sand-Fixing Species of Hedysarum

作　　者：闫志坚[1] 杨持[1] 高天明[1] 

机构地区：[1]内蒙古大学生态与环境科学系

出　　处：《吉林农业大学学报》2007年第2期173-180,共8页Journal of Jilin Agricultural University

基　　金：科技部社会公益基金资助项目(2004di133j094)

摘　　要：利用3年时间对3种岩黄芪属(Hedysarum L.)和3种锦鸡儿属(Caragana Fabr)植物的生长速率、生物量积累、家畜采食的幼嫩枝条比例、冠层结构等进行了对比研究。结果表明:岩黄芪属植物的生长速率显著高于锦鸡儿属植物,生长2年的岩黄芪属植物的生长速率为0.70 cm/d,锦鸡儿属植物为0.27 cm/d,岩黄芪属植物较锦鸡儿属植物能更早、更好地起到防风固沙作用。岩黄芪属植物生物量积累迅速,生长2年的岩黄芪属植物单株干重平均为41.17 g,产量干重为2 158.52 kg/hm2,锦鸡儿属植物单株干重为7.09 g,产量干重351.87 kg/hm2;生长3年的岩黄芪属植物单株干重平均为104.38 g,产量干重为3 132.63 kg/hm2,锦鸡儿属植物单株干重为14.23 g,产量干重703.88 kg/hm2,两属植物差异显著(P<0.05)。岩黄芪属植物随着年龄的增长,可供家畜采食的幼嫩枝条所占比例逐渐下降,生长2年的岩黄芪属植物8月份木质化枝条占总生物量干重的53.82%,生长3年的木质化枝条占总生物量的78.77%。Study area is located in Erdos grassland plateau. The plant growth rate, biomass accumulation, ratio of edible tender branches defoliated by livestock as well as the canopy-architecture of 3 species of Hedysarum and Caragana were studied for 3 years. The results were shown as follows ： The growth rate of Hedysarum species was significantly higher than that of Caragana species. The growth rate of 2-year Hedysarum species was 0.70 cm/d, but Caragana species was only 0.27 cm/d, indicating that the ability of Hedysarum species in respect of wind-defending and sand-fixing was better than that of Caragana species. The aboveground biomass accumulation rate of 2-year Hedysarum species was greater than that of Caragana species, the average dry weight of individual plant and dry yield of the former were 41.17g and 2 158.52 kg/hm^2 respectively, the later were 7.09 g per plant and 351.87 kg/hm^2 respectively. There was a significant difference between Hedysarum plant species and Caragana plant species in dry weight per plant and dry yield（kg/hm：）. As to 3-year Hedysarum species and Caragana species, the average dry weight of individual plant and the dryyield of the former were 104.38 g and 3 132.63 kg/hm： respectively, the later were 14.23 g and 703.88 kg/hm^2 respectively. With the increase of age of Hedysarum species, ratio of edible tender branches decreased in August, ratio of lignified branches of 2- year Hedysarum species accounted for 53.82% of the total biomass and that of 3-year species accounted for 78.77% .

关 键 词：岩黄芪属植物 锦鸡属植物 生长速率 生物量 幼嫩枝条 

分 类 号：S541[农业科学—作物学]