gaunt Tasmanian evergreen shrubby tree with slender tapering leaves 3 to 5 feet long 同义词：tree heath, Richea pandanifolia,
any of several Australian evergreen perennials having short thick woody stems crowned by a tuft of grasslike foliage and yielding acaroid resins 同义词：Australian grass tree,
elegant tree having either a single trunk or a branching trunk each with terminal clusters of long narrow leaves and large panicles of fragrant white, yellow or red flowers; New Zealand 同义词：cabbage tree, Cordyline australis,
例句与用法
1.
As a result it enhanced the water - retaining and fertility - retaining capacity , strengthened the anti - scour and anti - erosion ability . 3 . sabaigrass can meliorated the little entironment of purple soil bare slope field the results show that sabaigrass treatment and grass tree solid plating treatment can reduce n ( nitrogen ) , p ( phosphorus ) and k ( potassium ) erosion , increase soil nutrition element content , it also increase soil water content and soil pondage , decrease soil water evaporation , strengthen the anti - drought ability 龙须草能改善紫色土荒坡地的小生境龙须草纯种植被和林草立体种植植被能不同程度地增加土壤的有机质和速效n 、 p 、 k的含量；增加土壤含水量和贮水量，减缓和减少土壤的水分蒸发，增强土壤的抗旱能力；降低土壤盛夏的地表最高温度，减少地表温度变化幅度。
2.
In order to solve this problem , we find a kind of herbages plant - sabaigrass ( eulaliopsis binata ) which not only can accommodate the badly environment of purple soil but also have excellent water and soil conservation effect and good economic benefit . this study adopt quantitative and qualitative methods , through comparative study of four different utilization types : sabaigrass treatment , grass tree solid plating treatment ( planting sabaigrass under fruit trees treatment ) , bare land treatment , natural wild grassland treatment , study water and soil conservation effect , soil water condition , soil constructors condition , soil fertility condition and soil surface temperature , then evaluated the water and soil conservation effect of plating sabaigrass in purple soil bare sloping field and probed into water and soil conservation mechanism . the main results are as follows : 1 本研究针对湖南省衡邵盆地紫色岩地区日益恶劣的生态环境，从紫色土荒坡地水土流失治理入手，在寻求出既适应紫色土荒坡地恶劣环境又有良好水土保持作用和一定经济效应的作物? ?龙须草的基础上，用定性和定量相结合的方法，以“龙须草纯种” 、 “龙须草与果树立体种植” (简称林草立体种植，下同) 、 “空旷地” 、 “自然野生杂草地”四种不同的土地利用方式进行对比研究，从水土保持效应、土壤水文状况、土壤结构、土壤肥力状况、地表温度状况等方面分析、评价紫色土荒坡地种植龙须草防治水土流失的效应，并对其机理进行了初步探讨，主要研究结果如下： 1
3.
2 . the structure of purple soil is meliorated by sabaigrass . when contrast to bare land treatment and natural wild grassland treatment we knew that sabaigrass treatment and grass tree solid plating treatment reduced soil bulk density , enhanced soil capillary porosity , non - capillary porosity and porosity ratio , decreased soil sand grain content , enhanced soil clay grain and silt grain content so as to reduced the dispersal degree of soil , improved the aggregate capacity of soil , increased the amount of soil aggregate structure , meliorated the water permeability of soil , accelerated the form of good soil structure 龙须草能改善紫色土的土壤结构龙须草纯种植被和林草立体种植植被能不同程度地降低土壤容重，减少土壤砂粒含量，增加土壤的毛管孔隙度、非毛管孔隙度和孔隙比，以及增加粉粒含量，从而降低土壤分散度，提高土壤团聚性，增加土壤团粒结构数量，改善土壤的透水性，促进良好土壤结构的形成，最终提高土壤的蓄水保肥性能，增强土壤的抗蚀性和抗冲性。
您当前位置：