Analysis Of Qinghai Tibet Plateau Alpine Meadow Soil Temperature And Moisture Characteristics And Dynamic Contrast

The establishment of the field test site on the Qinghai Tibet Plateau hinterland YushuBatang Tibetan Autonomous Prefecture of Yushu County, alpine meadow, soiltemperature, humidity field dynamic monitoring. Using the field every10mintemperature and humidity monitoring data and meteorological data, using comparativeanalysis and linear trend method. Analysis of the Batang in alpine meadow, season, year,soil temperature and humidity conditions, and the freezing and thawing period, nonfreezing and thawing period, dynamic comparative study, soil temperature and no snowcovered under the wet. The main conclusions are as follows:1. Analysis of the basic characteristics of soil temperature and humidity: soiltemperature began to rise from around10, to17,18reached the highest value, and thenbegan to decline, at about9to reach the lowest; the soil moisture reaches a minimumvalue at about10, reached a maximum at about18, with the increase of soil depth, soilhumidity gradually decreased; soil temperature, humidity showed a different trend indifferent seasons, three point5,20cm showed a relatively uniform change, along with theincrease of soil depth, soil temperature, humidity decreased with distance increasing; thesnow fence, variation amplitude of soil temperature, humidity decreases graduallyweakened, difference; with the increase of soil depth, the influence of snow fence isgradually decreases.2. Analysis of soil temperature and humidity synchronization features: through theanalysis of soil temperature, moisture of different periods,-8in mid May mid month, soilmoisture and soil temperature showed the opposite trend, namely when the soiltemperature, soil moisture decreased, while in the rest period, the soil temperature andmoisture change trend, soil temperature, soil humidity is increased; the conversion periodin spring, autumn, the variation of soil temperature and humidity of the more obvious,autumn to winter conversion, the soil temperature and moisture were significantlydecreased, and soil into the frozen period, the winter to spring, conversion, soiltemperature and soil moisture increased, soil thawing period in cold season, the lower the soil; temperature is higher than the upper, warm season, the soil temperature is higherthan the lower level; the correlation analysis, soil temperature, humidity had significantpositive correlation.3. Analysis of different conditions and in different periods of the soil temperatureand moisture features: the freezing and thawing period and non freezing and thawingperiod the contrast can be seen, the soil temperature in the freezing and thawing periodand non freezing and thawing period opposite change trend, soil moisture during freezingand thawing period is constant, rather than freezing and thawing period, soil moisture,precipitation and the fluctuation; through see the snow cover, no characteristics of soiltemperature and soil moisture on soil temperature and moisture can, in the snow periodthan the no snow cover period stability, varies relatively smoothly, and the snow coverperiod soil temperature and humidity higher than that without snow, snow cover on soiltemperature and humidity has a certain role; Yushu, Maduo soil temperature and humiditycontrast analysis can see, the soil temperature of Yushu is higher than that of Maduo, andsoil moisture in different layers of different.