Water Behavior And Optimized Regulation Of Soil-Plant-Atmosphere Continual System In Huajiang Canyon

In view of the serious Degeneration, soil erosion of the Guizhou karst ecology frail area forest vegetation , the science and technology department attack the plan of comprehensive program in Huajiang ecology area in "the tenth five year plan" again to take the Huajiang canyon as a model district to development attack research, which is abaut 48 square kilometers and lies in the north west of Guizhou. the research of the water cycle rule and water saving and controlling is the one of the most important parts of this project research process , the Chinese red pepper tree is the main agricultural economy crops in this area, Therefore, it is very important to studies the SPAC system in this ecological condition through illuminating the agricultural microclimate and the theory movement rule of the water in soil and Chinese red pepper tree, developing new way water saveing irrigation, because it is of great importance to alleviates contradictory between the supply and demand of fertilizer and water, promote the cultivation technology with less water, improve soil ecological condition in forest land, promote the fruits output and quality, reduce the disease-carrying insect harm, transform the less produces garden and the maintenance high quality.This article has studied following several aspects content: 1st, study the water demand in forest ecology land system abaut plant water content, evaporates snd transpiration quantity and analyse crops' lowest water demand as well as the best water demand. 2nd, the distributed rule of rain water resources supply in space and time in Huajiang canyon area, through the way of establishing weather station in the project area, surveying the meteorological data, analying the difference between inside and outside the canyon in the rain water resources supply as well as the height, summarizing the rain water resources supply ability and the supply characteristic in project area . 3rd, the rule of soil water holding, mainly through researching the water content in different level soil, physics character and vegetation condition, analysis the ability of water holding in soil and the relations between soil water content and structure, summarize the anniversary dynamic...