试验地设在青海省果洛州达日县，平均海拔３９６７５ｍ，年均温－１３℃，青海４４４燕麦鲜草产量达１６１６７ｋｇ／ｈｍ２，干草产量５６００ｋｇ／ｈｍ２，较当地推广的巴燕３号燕麦分别高３４７％和４３６％。青海４４４最高生长量为０７２ｃｍ／ｄ，生育期平均生长量为０４５ｃｍ／ｄ；收获时叶面积指数为１１０，日平均叶面积增长量为１２０４ｃｍ２／ｍ２；日均干物质增长量最高达到１６９６ｇ／ｍ２；地上与地下生物量比率为３５８。７月下旬到８月上旬近二十几天，是光合叶面积、地上、地下生物量的重要增长期，也是干物质积累的关键时期。 The experimental site is located in Dayi County, Guoluo Prefecture, Qinghai Province, with an average elevation of 39675m, average annual temperature of -13 ℃, Qinghai 444 oats fresh grass yield of 16167kg / hm2, hay output of 5600kg / hm2, compared with the local promotion of Pakistan Yan 3 oats were 34.7% and 43.6% respectively. The highest growth of Qinghai 444 was 072cm / d, the average growth of growth stage was 045cm / d, the leaf area index at harvest was 110, and the average daily leaf area increment was 1204cm2 / m2. The average daily dry matter growth Up to 16  96g / m2; above-ground and underground biomass ratio of 3  58. In late July to early August nearly twenty days, is an important period of photosynthetic leaf area, aboveground and underground biomass growth is also dry The critical period of material accumulation.