stress of soil moisture 中文意思是什麼
stress of soil moisture
解釋
土壤水分應力-
Through investigating their index of growth and soil water content from april to october, observing their species composition in july and above - ground biomass in september, measuring seasonal changes of plant moisture stress, net photosynthesis rate, transpiration rate of s. viciifolia and hance, after analyzing all kind of data, the following conclusions can be drawn : 1
主要結論如下： 1 、狼牙刺的株高在1 . 50m左右、冠幅約2 . 0 2 . 0m 、平均分枝數約為4 . 45 。不同立地條件下，狼牙刺覆蓋度均在50以上，加上林下草灌層在生長旺期總蓋度均能達到70以上。 -
The methods of quantitative analysis of structural strength of loess are put forward, and effects of soil moisture upon structural strength of loess are also quantitatively analyzed in this paper. the strength of loess is formed by structural strength and compaction strength, and structural strength can be expressed by the difference of stress between structural loess and man - made loess. the structural strength of loess can be quantitatively analyzed by different test in laboratory
黃土結構強度的大小反映著黃土結構性的強弱，本文比較系統地研究了黃土結構強度的影響因素及其分析方法；黃土的強度由結構強度和固結強度組成，其結構強度可用結構性黃土與重塑黃土的應力差表示，可以用不同的試驗方法，進行結構強度的定量分析；結構強度的發揮過程曲線反映了結構強度隨應變的變化過程；含水量對黃土結構強度構成顯著的影響。 -
Effect of nacl stress on growth and mineral element absorption of clove medicago sativa l. seedling during changes of soil moisture
蒸發脫濕過程中鹽脅迫對苜蓿生長及礦質元素吸收運輸的影響 -
( 3 ) study of triaxial test of dry soil and the formation of shear band in triaxial specimen of fly ash. because the digital image processing technique can directly measure the axial and radial deformation of soil specimen in any moisture, general triaxial apparatus can be used to do the triaxial test of dry soil. in the study of the triaxial test of dry soil, the stress - strain characteristic is compared with that of the saturate soil at the same condition
（ 3 ）干土的三軸試驗以及粉煤灰三軸試樣剪切帶形成的試驗研究：利用土樣變形數字圖像測量技術可以直接量測任意含水量土樣的軸向和徑向變形，對干土和飽和土進行三軸試驗，比較了干土和相同條件下飽和土的應力應變特性。 -
Abstract : based on the mathematical model for coupled of moisture, heat and stress fields during soil freezing, moisture, heat and stress fields during soil freezing around the buried chilled pipeline were studied
文摘:根據凍土水熱力耦合數學模型，數值模擬了輸冷管道附近土體凍結過程的溫度場、水分場、應力場，並給出了土體凍脹位移，得出凍土水熱力三場的耦合關系。 -
Basing on existing test equipments, we select sandy soil and silty soil for lab simulation test. through the process of test, we rigid control the moisture content and destiny of soil. on one hand, the conclusions of lab simulation test verified the laws of diffusion and transfer of additional stress
本文選擇室內模擬試驗進行土中應力分佈傳遞過程的模擬，在土中應力分佈傳遞規律影響因素的分析的基礎上，提取影響應力分佈傳遞的控制因素，在控制主要影響因素情況下，簡化試驗初始條件，選用砂土與粉土進行室內模擬試驗研究。 -
As a result of researches, several water indexes were brought up from different methods, such as soil moisture content and air relative humidity, which were most commonly used in the past irrigation control system. for crop water stress, however, those are all insensitive and indirect indexes that represent the environmental states of crops
在已建立的灌溉自動控制系統中，土壤含水量或大氣相對濕度是最常見的控制農作物灌溉的指標，但對作物缺水而言，這些都是反映作物生長環境的間接指標，對反映作物的缺水比較遲鈍、滯后。
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