毛管上升孔 的英文怎麼說
中文拼音 [máoguǎnshàngshēngkǒng]
毛管上升孔
英文
capillary life test-
Two coloured indices are fitted up inside the capillaries on either side of a u - tube. when the temperature falls, the index will keep still, therby indicating maximum and minimum temperatures
在溫度管左右毛細孔內各裝有1枚指示針。當溫度上升時,指示針受水銀柱推動而上升;溫度下降時,指示針不受影響,可停留在原點,從而指示出最高或最低溫度。Soil saturated capacity, capillary capacity, total porosity and capillary porosity showed the trend of the " u " during the successional course of artificial forest, namely, they reduced on the early successional stages, after picea reached mature forest, soil porosity recovered slowly. the content of natural water was mainly affected by capillary porosity. from soil chemical properties analysis, the content of soil organic, humus, ha, fa and ha / fa of topsoil was more than that of bottom layer
即人工雲杉幼林向成熟林演替階段,土壤飽和持水量、毛管持水量及總孔隙和毛管孔隙則減少,在40年生雲杉林達最低值,之後隨著雲杉自疏,微生態改善,林地凋落物分解加快,土壤飽和持水量、毛管持水量及總孔隙和毛管孔有上升的趨勢,毛管持水量是決定林地自然含水量的主要因子。
分享友人