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Formation Mechanism of Condensation Water and It’s Effects on the Moisture Characteristics of Plant in Semi-arid Area

Author: LiHongBo
Tutor: WangLinHe
School: Inner Mongolia Agricultural University
Course: Soil and Water Conservation and Desertification Combating
Keywords: Semiarid area Condensate Sabina vulgaris Oil of Artemisia Seed Artemisia Water potential Relative water content
CLC: Q945
Type: PhD thesis
Year: 2010
Downloads: 215
Quote: 1
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Abstract

Condensate important source of water for the ecosystem of semi-arid areas, and this article in the Experimental Station of Inner Mongolia Agricultural University Technology Park grassland and Mu Us Sandland development and rehabilitation research center for the test base, in the period from 2007 to 2009, the self-made miniature lysimeter weighing law, the isolated twigs law, the artificial surface method of condensation pressure chamber, sealed bags and potted plants under drought stress methods such as condensate characteristics of the soil, the plant canopy condensate characteristics, condensate Sabina vulgaris (Sabina vulgaris), oil of Artemisia (Artemisia ordosica) and seed Artemisia (Artemisia sphaerocephala) water characteristics impact. Achieved the following results: 1. Semi-arid areas the soil surface condensate by hygroscopic water, the atmospheric condensation water and soil deep water vapor condensate. Soil condensate positive correlation between the soil surface 0 ~~ 2cm, 2 ~ 4cm, soil surface 0 ~ 2cm, 2 ~ 4cm condensation amount with 0 ~ 10cm condensation linearly. The atmospheric contribution rate is far less than the condensation of water vapor on the soil surface (5cm) deep soil moisture contribution rate, the ratio of 3.1:10 to 4.5:10. With the reduction of the amount of soil surface condensation of atmospheric water vapor condenses on soil water contribution will increase the contribution of deep soil moisture will decrease in the dry season, the two largest ratio 8:10. Water vapor in the atmosphere is always the first to arrive and leave in the water vapor in the soil the soil surface. Soil condensation water changes with the seasons, the rainy season soil condensation water evaporation volume greater than the dry season. That day the condensation amount, and the next day evaporation showed a significant linear positive correlation relationship (y = 0.947x 0.0103, R2 = 0.9454, n = 348, P lt; 0.05). Initial soil (millet the calcium soil) surface moisture content and moisture content of the incremental presented a significant negative linear correlation (y =-0.2618x 0.7192, R2 = .5609, n = 51, P lt; 0.0001). Small sand particles and more physical clay soil contained in the more favorable soil moisture condensation water formation, moisture condensation ability of to Sabina vulgaris soil samples gt; A. ordosica soil samples gt; bare soil samples ground soil samples gt; aeolian sand. Plant cover helps soil moisture condensation water formation, and the size of the canopy clotting ability canopy gt Sabina vulgaris in Mu Us Sandland; Artemisia oil Canopy gt; bare land. Sabina vulgaris canopy vertical height relative humidity reaches 100% of the duration of the order of 100cm, 50cm, 150cm and 5cm. Sabina vulgaris canopy artificial condensation surface and condensate vitro branches intercept ability differences significant positive linear relationship with condensation duration. May to September 2009 the plant growth period Sabina vulgaris canopy PVC condensation tray are able to intercept the condensate, the amount of vertical height condense the difference was not significant, the rainy season and the dry season maximum daily average intercept were 0.0994mm and 0.0086mm . Soil condensation water in the amount of water of the PVC condensation tray condensation Sabina vulgaris canopy canopy significant. 4. Leading meteorological factors affect the amount of soil moisture condensation rainy and dry seasons, respectively, relative humidity and absolute humidity. Showed a very significant negative correlation between the the PVC the condensation tray condensation amount Sabina vulgaris canopy and 12h night average temperature and average relative humidity 24h, 12h nighttime average relative humidity and the dew point rendering highly significant positive correlation. Condensate significantly affect water characteristics of Sabina vulgaris oil Artemisia seed Artemisia vitro shoots and potted seedlings shoots condensate to maintain or enhance the water potential of the branches, increasing the relative water content of the branches after the in indoor spray seal bags stink The Bo, the average 12h incremental oil of Artemisia and seed Artemisia twig water potential for 0.0454 0.1646MPa, 0.1725 ~ 0.3466MPa, and 0.6553 ~~ 0.7792MPa of; the average 12h incremental relative water content of 0.92% to 3.01%, respectively, from 2.47% to 4.68% and from 1.57% to 4.95%.

Formation Mechanism of Condensation Water and It’s Effects on the Moisture Characteristics of Plant in Semi-arid Area

Abstract

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