water locust 中文意思是什麼
water locust
解釋
【植物；植物學】水生皂莢。-
This paper deals with the water physiology and growth characteristics of locust seedling under the soil drought condition
摘要採用盆栽試驗對不同土壤乾旱程度下刺槐幼苗水分生理特徵進行了初步研究。 -
We study the regular of soil water contents in 11 years artificial locust woodland. the results showed that soil water contents are semi - shady > sunny > semi - sunny. so we can draw the conclusion that the reason of differential productivity of artificial locust woodland in different site types is soil water content rather than soil nutrients
對11年人工刺槐林土壤含水量變化規律的研究表明，三個立地類型的刺槐林土壤含水量差異顯著，其土壤含水量從大到小的順序為：半陰坡半陽坡陽坡，因此就可以斷定，在黃土高原現有的土壤養分背景下，引起不同立地類型生產力差異的主要原因不是土壤養分，土壤含水量是引起黃土高原人工刺槐林生產力差異的主要原因。 -
Based on the achievement of related previous studies on this issue and the unsolved problems, here three aspects are concentrated in this dissertation for the issue. they are : study on the variation law of soil water and soil nutrients " background and productivity of the artificial locust woodland in northern shaanxi province ; the characters of the communities restoration and soil properties change of different barren grassland in loess plateau. the objectives are approached both by field survey and lab analysis
本研究針對黃土高原水分生態環境研究的現狀，黃土高原的生態建設和植被恢復中存在的問題，主要致力於以下幾個方面的研究：陜北黃土高原不同立地條件下人工刺槐林土壤水分與土壤養分背景和生產力關系研究；黃土高原退耕地不同撂荒年限草地的群落動態與土壤性質演變分析。 -
The law was alike between initial stage and the peak of growth, but the rates reaching maximum of negative and positive were in the different soil depths, and the inflexions of increment and decrement by degrees were also different. the soil water content in terminal stage increased positively, and in surface reached the maximum, but decreased with the depths, except a little increment in the depth of 460 - 600cm. 2. the contents of soil organic matter of 0 - 40cm is greater than other layers in eleven - year locust and 40 - 100cm are little low than 100 - 220cm
不同生長時期，土壤含水量變化的速度不同，生長初期和生長旺季的規律相似，但速度出現負的最大和正的最大所在的土層深度不同，速度遞增和遞減拐點所在的土層深度也不同，速度出現負值，說明隨著土層深度的加深，土壤含水量在增加，速度為正值，說明隨著土層深度的加深，土壤含水量在減少；生長末期速度均為正值，表層最大，隨土層深度的加深，速度遞減，到460 - 600cm處速度略有增加。 -
The growth condition of artificial locust woodland has the consanguineous relativity between soil water content, which have been the key factor effected forest growth, so we must saw about the soil water eco - environment in different site types when arraying the forest and grass construction. 4. in order to exploit the trend and rule of vegetation
總之，黃土高原的土壤水分生態環境總體上處于乾旱缺水的狀態，在這種水分背景下，水分作為植物生存的基本生活因子，在黃土高原地區具有其特殊的生態學意義，它不僅影響植物的個體發育，而且決定著植物的類型，並限制植被的分佈。
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