欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
长期过度放牧干扰会导致典型草原羊草（Leymus chinensis）矮化现象,矮化羊草在形态构件和生物量分配模式方面都形成了适应放牧干扰的机制,本文通过实验室盆栽试验,比较了正常羊草和矮化羊草在构件和生物量分配模式上的差异。结果表明：矮化羊草植株的平均高度比正常羊草降低了2.5%,叶长、根长、根节长分别下降3.1%,8.3%和3.8%;叶宽显著低于正常羊草,降低了8.7%（P〈0.05）,而矮化羊草的萌蘖点则显著高于正常羊草,增加了21.9%（P〈0.05）;矮化羊草单株生物量降低10.2%,茎叶比降低11.4%,地上/地下生物量比值降低2.2%。由此可知,矮化羊草以增加分蘖数、加大地下根部物质和能量的投入等来应对不利气候变化和家畜采食及践踏。
英文摘要：
Severe and prolonged grazing lead to Leymus chinensis miniaturized in typical grassland.Miniaturized L.chinensis is formed to adapt to grazing interference mechanism in the form element and biomass allocation mode.The different components and biomass allocation modes of both normal and miniaturized L.chinensis are compared in this paper through laboratory pot experiment.Results show that the average height of miniaturized L.chinensis is 2.5% lower than that of normal.Leaf length,root and root joint length fall by 3.1%,8.3% and 3.8% compared with normal.Blade width reduced by 8.7% is significantly lower than normal.Miniaturized L.chinensis meristem increased by 21.9% is significantly higher than that of normal.The individual biomass,stem/leaf and ground/underground biomass ratio of miniaturized L.chinensis reduced by 10.2%,11.4% and 2.2%,respectively.Thus miniaturized L.chinensis has increased tiller number,underground root input in matter and energy in order to deal with the unfavorable climate change,livestock feeding and trampling.
同期刊论文项目
同项目期刊论文
期刊信息
位置：