检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:马玉寿[1] 郎百宁[1] 李青云[1] 施建军[1] 董全民[1]
机构地区:[1]青海省畜牧兽医科学院草原研究所,青海西宁810003
出 处:《草业科学》2002年第9期1-5,共5页Pratacultural Science
基 金:青海省"九五"攻关项目 (编号 96- N -112 )
摘 要:通过对江河源区高寒草甸退化草地现状的调查研究 ,将这一地区的退化草地分为轻度、中度、重度和极度退化 4类 ,对不同退化演替阶段的草地采取不同治理措施进行试验研究。最后提出了通过禁牧封育、毒杂草防除和草地施肥的措施进行轻度和中度退化草地的恢复改良。通过建植人工草地和半人工草地的手段恢复与重建重度和“黑土型”退化草地的技术方案。Situation of alpine meadow degenerated grassland in Changjiang and Yellow river source region was analysed, grassland in this region was divided into four types, including lightly, moderately, heavily and seriously degenerated grassland, and the different measures were applied in research experiments according to differently degenerated stages. Some technologies were used to improving grassland,such as,the lightly and moderately degenerated grassland can be rehabilitated by enclosing, eradicating weeds and fertilizing, and for the heavily degenerated and "black soil type" degenerated grassland, can be rehabilitated and rebuilt by establishing artificial and semiartificial grassland.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.4