矮化林 的英文怎麼說
中文拼音 [ǎihuàlīn]
矮化林
英文
dwarf trees-
In this paper, two major types, the natural vegetation and crop vegetation in luota are studied. we can gain the different distributive area by remote sensing technology, in accordance with conifer forest, broadleaf forest, thick shrub forest, shrub forest, herbs shrub forest, herbs naked rock and crop vegetation. the valuation of the output of standing trees, water conserbancy, soil conserbation to control erosion and purify the air is the main basis which is used to value the functions of the forest ecosystem of the conifer forest and broadleaf forest of luotathe result reveal that the total ecological function value of the forest which area is 1388. 8 hm2 is estimated up to 18. 36 million yuan per annum. the synthetic valuation system of luota vegetation is put forward by the valuation of per hm2 in evergreen - deciduous forest, conifer forest, conifer and broadleaf forest, broadleaf forest, scatteredtree - shrub forest, coppice - shrub forest, herbs shrub forest, econamic crop and cereal crops. the plant resources is valued according to the ornamental and green plant. lumber trees and medical plant. ornamental plant includes hosta plantaginea. lilium brownii van viridulum, spiraea cantomiensis and so on. lumber tuees includes zzzelkova schneideriana, emmenopterys henryi, catalpa fargesii and so on
本文把洛塔現存植被分為自然植被與栽培植被兩大類進行研究，通過遙感技術對現存植被按針葉林、闊葉林、密灌、灌叢、草灌、荒草裸巖、農作物植被等類型進行分佈面積的統計，在此基礎上，以林產品價值、涵養水源價值、保護土壤價值和凈化空氣價值作為估算的主要參考依據，對已成林的針葉林與闊葉林進行森林生態系統的價值估算，得出面積為1388 . 8hm ~ 2的針葉闊葉林的森林生態價值為1836 . 37萬元，參照這一生態價值量，把洛塔植被按常綠落葉林、針葉林、針闊混交林、闊葉林、疏林?灌叢、矮灌叢、荒草灌叢、經濟作物和糧食作物，以每hm ~ 2的價值量提出了洛塔植被的綜合價值體系。Then, by the comprehensive analysis of essential conditions for stone forest development, and the quantitative study on the evolution phases of bajiang karst catchment and the spacial coupling analysis of its hydro - geomorphological system, the paper studies the relationship between the evolution of bajiang karst drainage area and the development of stone forest, and, combined with the evolution history of the catchment, puts forward a model concerning the relationship between the evolution of bajiang karst catchment and stone forest development, in the mechanism of " tri - level erosion ", if a < s < c, the visible and actual height of stone pillars will keep on increasing, meanwhile, soil layer among stone pillars will become thicker and thicker, so the the height of stone pillars " root will become higher and higher, too
在「三重剝蝕」機制中，若a s c ，石柱的可見高度和實際高度會不斷增高，同時，石柱的根部的土層會增厚，其土下部分的高度也會不斷增大。若a c s ，說明石柱的實際高度在增加的同時，其可見高度也在增加，但土層會變得越來越薄，最終當底土被完全剝蝕掉后，氣下溶蝕和土下溶蝕的差異消失，此時a接近於c ，石柱的實際高度將停止拔高或極緩慢增長，並在各種物理、化學風化的作用下而變得日益矮小。若s a c ，石柱的可見高度將趨于變矮，但驅動石林發育的土層厚度將會增大。
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