退化嵩草型高山草地补播豆科牧草的研究

报道了退化嵩草型高山草地补播为４种优良豆科植物对草地牧草生长、地上生物量及地上净最大营养物质生产力的影响。结果表明，补播红豆草、紫花芷蓿和红三叶能正常生长发育，其生长逻辑斯谛曲线，生长拐点出现在水热最大组合的６－７月。红豆草区地上生物量达到４２４７．３３ｋｇ／ｈｍ＾２，与其他试验区地下生物量有极显著差异。红豆草区地下净最大营养生产力最高，粗蛋白、钙和磷分别达到４８０．３７、４５．４５和５．８２ｋｇ

Additive Sowing of Leguminous Forage onDeteriorated Alpine Kobresia Grassland

Four leguminous forage species were introduced to the deteriorated natural alpine Kobresia grassland in the south of Gansu to determine their effect on promoting grassland productivity. The species tested were Onobrychis viciaefolia, Trifolium pratense, T. repens and Medicago sativa. It was shown that O. viciaefolia, T. pratense and M. sativa can grow normally under the local conditions, and their growth was consistent with the Logistic Growth Model, in which the inflexion points on the growth curves of the 3 species took place during JuneJuly when the maximum of combined waterheat values was attained. The highest forage yield was obtained from O. viciaefolia: 4 247.33 kg aboveground dry matter per hectare, containing 480.37 kg crude protein, 45.45 kg calcium and 5.82 kg phosphorus.