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草原改良建设的措施很多,但重要的是补播优良牧草,改变草场植物组成成分及生产结构,以利充分利用生态环境,发挥最大生产效率。这是当前我省天然草场建设势在必行的重要课题。我校牧草试验基地先后引种加拿大阿尔伯塔优良牧草21个品种,结果有些品种在我省的气候条件下无法越冬或越冬率极低,不适于我省种植。现将四年来表现较佳的几个品种的一些情况概述如下。一、各品种生育状况及产量从产量上看,虽均为多年生牧草,但播种当年产草量仍有差异。禾木科牧草超过对照品种(羊草)的有无芒雀麦(Bro-
There are many measures to improve grassland construction. However, it is important to replenish good pastures and change the composition and production structure of grassland plants so as to make full use of the ecological environment and maximize the production efficiency. This is an important issue that is imperative for the construction of natural grassland in our province. Our pasture testing base has introduced 21 species of excellent pasture of Alberta, Canada. As a result, some species can not wintering or have a low rate of overwintering in the climate of our province, which is not suitable for planting in our province. Some examples of several varieties that have performed better over the past four years are summarized below. First, the variety of fertility status and yield From the yield point of view, although all perennial pasture, but sowing year grasses are still different. Gramineous pasture more than the control variety (Leymus chinensis) without Bromus (Bro-