四川师范大学学报（自然科学版）2017，Vol.40Issue(3)：385-391,7.DOI:10.3969/j.issn.1001-8395.2017.03.019
藏东南高寒地区人工草地建植初期生物量研究
Study on the Biomass of Artificial Grassland in the Alpine Region of the Southeastern Tibetan Plateau
摘要
Abstract
Taking artificial grassland in the alpine region as a study object,according to local environment,we chose four kinds of forage species make experiments in different sowing methods.The conclusion is as follows:1) In the single sowing experiment,the total biomass of Elymus nutans and Elymus sibiricus are highest,(228.80 ± 26.61) and (225.47-± 62.85) g/m2,respectively.In the mixed sowing experiment,the total biomass of Medicago sativa + Elymus sibiricus is highest.2) The belowground biomass of the 10 kinds of vegetation in profile show a "T" shape,0 ～15 cm root biomass account for the total belowground biomass ratio between 63.21％ ～88.17％.In other words,the root biomass in upper soil depth is larger,the root biomass in deep soil profile is less.The percentage of 0 ～ 15 cm root biomass ofAvena sativa +Elymus nutans is the highest,is 88.17％.3) The aboveground biomass of the artificial grassland is significantly positively correlated with the belowground biomass,and the correlation coefficient of the linear regression is 0.83.4) The root-top ratio in single sowing grassland from large to small are Medicago sativa,Elymus sibiricus,Avena sativa,Elymus nutans,the difference among them are not obvious.In the mixed sowing grassland,the root-top ratio of Elymus nutans + Elymus sibiricus,Medicago sativa + Avena sativa,Medicago sativa + Elymus sibiricus are bigger,between 2.40 and 2.60,the root-top ratio of Elymus nutans + Medicago sativa is smallest.关键词
人工草地/生物量/植被恢复Key words
artificial grassland/the biomass/vegetation restoration分类
农业科技引用本文复制引用
吕富成,王孙高,王小丹..藏东南高寒地区人工草地建植初期生物量研究[J].四川师范大学学报（自然科学版）,2017,40(3):385-391,7.基金项目
国家自然科学基金(41571205)和华能集团总部科技项目(HNKJ14-H17) （41571205）
