Position: Home > Articles > Improving Effects of Root Cutting Ways and Nitrogen Additions on Degraded Leymus chinensis Grassland in Inner Mongolia
Chinese Journal of Grassland
2017
(4)
67-71
切根方式和氮素添加对退化羊草草地改良效果分析
作 者：
奇立敏;宝音陶格涛;李雅茹;李永宏;陈积山
单 位：
内蒙古大学生态与环境资源学院;黑龙江省农业科学院草业研究所
关键词：
退化羊草草地;切根;施肥;草地生物量
摘 要：
为了研究内蒙古中度退化羊草草地不同切根方式和不同梯度氮素添加组合处理的综合改良效果,采用二裂式裂区试验设计,分析不同组合处理对羊草草地群落及羊草种群的影响。结果表明,宽度为20cm条形方式切根与60kg/hm2氮素添加组合处理群落地上生物量、羊草种群地上生物量、羊草种群密度和羊草种群高度最高。30~60kg/hm2氮素添加量显著提高群落地上生物量和羊草种群地上生物量。宽度为20cm条形方式的切根处理效果优于宽度为40cm井字形方式的切根处理改良效果。与切根和氮素对羊草草地改良的简单效应相比较,切根和氮素的交互作用产生了调节作用,但未出现显著差异。
译 名：
Improving Effects of Root Cutting Ways and Nitrogen Additions on Degraded Leymus chinensis Grassland in Inner Mongolia
作 者：
QI Li-min;BAOYIN Taogetao;LI Ya-ru;LI Yong-hong;CHEN Ji-shan;School of Ecology and Environment,Inner Mongolia University;Institute of Pratacultural Science,Heilongjiang Academy of Agricultural Science;
关键词：
Degraded grassland;;Root cutting;;Applying nitrogen;;Grassland biomass
摘 要：
In order to analyze the improving effects of root cutting ways and nitrogen additions on degraded Leymus chinensis grassland in Inner Mongolia,a soil-gashing and root cutting and nitrogen addition experiment were conducted in a degraded grassland plot that was fenced in Inner Mongolia University grassland ecological research base.The results showed that L.chinensis grassland productivity was restored by the soil-gashing and cutting-roots and nitrogen application.The aboveground biomass,population density and height of L.chinensis population treated with width of 20 cm strip cutting root way and adding 60kgN/hm2 were the highest.Adding 30~60kgN/hm2 increased community aboveground biomass and L.chinensis population aboveground biomass significantly.The effect of 20 cm strip cutting root way was better than that of 40 cm strip cutting root way.The interactions between cutting roots and nitrogen had a regulatory role,but did not reach significant.
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