高寒地区微肥对多年生人工草地生产性能的影响

Effect of trace element fertilizers on the productivity of cultivated perennial grassland in alpine area

在建植5年的中华羊茅(Festuca ovinavar.china)和冷地型早熟禾(Poa alpigena)人工草地上,进行不同微量元素肥料配比的追肥试验。结果表明:(1)在中华羊茅和冷地型早熟禾处理组中,进行的硼砂、硫酸铜和硫酸锌的追肥处理,对牧草的地上植物量和种子产量有提高作用。在中华羊茅草地里,硼肥处理分别提高地上植物量和种子产量为12.2%,10.2%;在冷地型早熟禾草地里分别为13.2%,10.2%,差异均显著;但Cu肥,Zn肥处理组间的差异不显著;(2)硼肥对中华羊茅和冷型地早熟禾两种植株的分蘖密度和有效小穗数影响显著,分别提高12.3%,9.3%;10.5%,8.8%,铜肥和锌肥的差异不显著。

The effects of trace element fertilizers on the cultivated perennial grasslands（Festuca sinensis and Poa alpigena）that had grown for 5 years were studied by top-dressing. The results showed that the effects of B, CuSO, and ZnSO, on the seed yield and aboveground biomass were positive. Out of all treatments, the aboveground biomass and seed yield of Festuca sinensis were increased by 12.2% and 10.2% in B fertilization treatment,and those of Poa alpigena were increased by 13.2 % and 10.2% respectively. However, the effect of Cu and Zn fertilization was not significant. The density of tillers and number of effective ears were significantly increased by 12. 3% and 9. 3% for Festuca sinensis and 10. 5% and 8.8% for Poa alpigena in P fertilization treatments,but the effects of Cu and Zn fertilization were not significant.