1) water retention test
持水性能测定
2) water-holding capacity
持水性能
1.
From the static analysis of Seabuckthorn forest in the ecological construction areas,the older the communities Seabuckthorn were,the larger dry material accumulation of litter layer and water-holding rate were,the greater water-holding capacity of litter layer was.
本文对内蒙古鄂尔多斯市砒砂岩区人工沙棘林地枯落物持水性能进行了研究。
2.
Results indicate that: ①Litter layer of forest vegetation play an important role in water-holding capacity.
在山东省邹城市刘庄小流域水土保持生态修复区内 ,对 5种森林植被类型的枯落物持水性能进行了研究。
3.
As a result showed that: (1) Water-holding capacity of the litter in forest communities was higher than litter of the shrub and the herb, semi-decomposed litter layer was higher than un-d.
通过对京西百花山区9种植物群落凋落物持水性能、凋落物与土壤理化性状相关性分析、凋落物对土壤呼吸的影响以及凋落物对土壤种子库的截留和对萌发幼苗的影响进行研究,研究结果表明: (1)森林群落凋落物的持水能力较灌木和草本群落更高,半分解层凋落物较未分解层具有更高的持水能力。
3) water holding capacity
持水性能
1.
The pools and water holding capacity of moss and litter layers of residual stands,secondary forests,natural forests and artificial spruce forests in different ecological restoration stages in western Sichuan were studied in this paper.
本文作者对川西地区典型的不同恢复阶段的人工云杉林、迹地、次生林和原始林下苔藓与枯枝落叶层贮量和持水性能进行了试验研究 。
2.
The authors studied the volume and water holding capacity of moss and litter layers under Abies georgei forest of different slope direction of the east slope of mount sejila in Tibet.
枯枝落叶层持水性能优于苔藓,说明枯枝落叶层在森林的水源涵养方面发挥了更为重要的作用。
4) characteristic measurement of water pump
水泵的性能测定
5) bibliomerer
吸水性能测定仪
6) performance measuring
性能测定
1.
According to the spot need of fan performance measuring and based on the comprehension and possession of predecessor' research findings in software and hardware of mine fan performance measuring system,a more innovative system of mine main fan performance measuring is developed.
根据风机性能测定的现场需要,在充分了解和掌握前人在矿井主要通风机性能测定系统软硬件研究成果的基础上,开发了一套比较新颖的矿井主要通风机性能测定系统,该系统完全实现了矿井主要通风机性能测定中所有参数的自动采集和计算,上位机能动态显示各测定和计算参数、绘出风机性能特性曲线、保存测定数据。
补充资料：饱和持水量测定
饱和持水量测定
measurement of saturation moisture capacity
匕aohe ehishuiliang eeding饱和持水t测定(measurement of satu-ration moisture eaPaeity)土壤农业水文特性测定项目之一，是测定土壤孔隙完全充满水时的l几壤湿度。饱和持水t所占容积等于土壤总孔隙度，可用来鉴定土壤水分饱和程度和总孔隙度。 测定方法是浸水饱和法。即在欲测地段上，用容重环刀取原状土，取土方法与测定卜壤容重时取_L相同(见土壤容l测定)。把装有未遭破坏土样的环刀称重后，使其有孔底一端(内垫滤纸)朝下，放在盛水的平底磁盘中或充满水的砂层上，使盘内水面与环刀上缘保持一样高，切勿使水面淹没环刀，以免影响空气自土壤孔隙排出，使水不能充满孔隙。经过一定时间后(砂土4一8小时，粘土8一12小时)迅速取出，用盒盖托住称重。然后再放入盘中，继续使水充满孔隙，直至前后两次重量无显著差异为止。为了计算环刀中土体的干土重，必须在同一土层上，另取土样，用称重烘干法测其湿度。用下式计算饱和持水量(占干土重的百分数): 环刀中上样吸水饱和*、、、。_后的含水量吧刊’寸小里一环万币王释的不干甭入川U.式中上样干土重(克)=环刀中的湿土重(克)xl()0100十上样湿度的百分数 此外，通过下式也可计算饱和持水量(占干土重的百分数):饱和持水量二总孔隙度 容重火10()%式中总孔隙度二1一宣重比重(林家栋)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条