摘要
报道了退化嵩草型高山草地补播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、紫花苜蓿和红三叶能正常生长发育，其生长符合逻辑斯谛曲线，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（干物质）达到４２４７．３３ｋｇ／ｈｍ２，与其他试验区地上生物量有极显著差异（Ｐ＜０．０１）。红豆草区地上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／ｈｍ２。
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.
出处
《草业学报》
CSCD
1999年第2期71-75,共5页
Acta Prataculturae Sinica
关键词
生长速度
退化草地
补播
豆科牧草
Alpine grassland, additive sowing, growth rate, aboveground biomass
