青海444燕麦在高山牧场的生长性能及适应性

Growth Character and Adaptation of Oats Qinghai 444 in Alpine Pasture

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 fresh and dry oats yield of Qinghai 444 reached 16167kg/hm 2 and 5600kg/hm 2,respectively,in Dari County at 3967.5 meters above sea level where annual average temperature is -1.3℃ and was 34.7% and 43.6% higher than those of Bayan 3 which was popularized by local government,respectively. The highest growth volume of Qinghai 444 was 0.72 cm/d,average growth volume was 0.45 cm/d,In harvesting,the index of leaf area was 11.0 ,the average growth of leaf areas was 1204cm 2/m 2 per day,the highest growth volume of dry matter reached 16.96g/m 2 per day,the ratio of aboveground to underground biomass was 3.58.The crucial growth period of leaf area,aboveground and underground biomass and dry matter accumulation was during 20 days that from the later of July to early of August. \ \