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试验地设在青海省果洛州达日县,平均海拔39675m,年均温-13℃,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347%和436%。青海444最高生长量为072cm/d,生育期平均生长量为045cm/d;收获时叶面积指数为110,日平均叶面积增长量为1204cm2/m2;日均干物质增长量最高达到1696g/m2;地上与地下生物量比率为358。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 39675m, average annual temperature of -13 ℃, 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 072cm / d, the average growth of growth stage was 045cm / d, the leaf area index at harvest was 110, 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.