关键词: 牧草, 牧草, 降解减容, 真菌, 失重率

Abstract: Based on the daily precipitation, cloud cover and sunshine duration data from April to October during 1961-2015 derived from the 50 meteorological stations in Qinghai, the paper studied the relationship between cloud cover and sunshine duration, and revises the indicators for the continuous rain monitored, moreover, analyzed the spatial-temporal distribution and the intensity change of continuous rainy days. The results showed that: (1) the monitoring indicators of continuous rain in Qinghai after revising were: the continuous rain days should be equal to or more than 5 days (the daily averaged sunshine duration during this period should be equal to or less than 6 hours), the total precipitation of the process should be equal to or more than 10 mm, and 2 non-rainy days (the daily precipitation less than 0.1 mm) could not appear in this period; (2) the continuous rain days decreased from east to west, and the maximum value could be found in south Qinghai, next in Qinghai Lake area, and the least was in Qaidam basin area; (3) the annual averaged continuous rain days had no significant change trend, but had obvious decadal period which was normal in 1961-1989, less in 1990-2002 and more thereafter; (4) the longest continuous rain days exceeded 8 days and appeared most frequently in June, July and September, and then in August, April and October had the fewest continuous ran days.