Effects Of Water And Temperature On Carbon Release Of The Dominant Species Of Moss Crusts—Syntrichia Caninervis

This paper took natural biological moss crusts grown in GuErBan TongGu Te desert as research object, geting through indoor experiments and monitoring the carbon emission of Syntrichia caninervis under different water conditions(0ml、50ml、100 ml、150ml、200ml、250ml)、different temperatures(0℃、5℃、10℃、15℃、20℃、25℃、30℃、35℃、40℃) and snow conditions by Li-8100(portable soil respiration apparatus). Researched and revealed the dynamic change of S.caninervis carbon release under water and temperature conditions and the influence of snow on carbon release, discussed the effect law of water and temperature on S.caninervis carbon release. This research mainly got the following conclusions:(1)The variation trend of S.caninervis carbon release under different water and temperature conditions lived up to graphics of logarithm(y = aLn(x) – b).(2)Due to the large variation rate of the first three hours of carbon emission of S.caninervis under water condition, added water twice and tested for three hours. The results showed that the second measurement of carbon emission significantly less than the first measurement.(3)Temperature influenced indirectly carbon release by influencing water content change of S.caninervis. The speed of carbon release got faster under high temperature and got slower under low temperature. Higher the temperature, faster the carbon release speed of S.caninervis; lower the temperature, slower the carbon release speed of S.caninervis and longer the carbon release duration.(4)After the winter snow, S.caninervis still had carbon release at the situation of covered snow. Carbon emission of S.caninervis depended on the size of snow and water after melting. However, the instantaneous carbon emission was controlled by the change of temperature. In general, carbon emission was influenced by the combination of moisture and temperature after snow outside.