论文部分内容阅读
一、选择合格苗木和适宜的种植密度首先育苗前应选择好无病虫害苗木,地径最好在0.8cm 以上。其原因是:小苗种植平茬以后基径越粗长出来的小苗越壮,这样,在正常管理情况下一年生苗的主干应是又粗又高,以利第二年、第三年的管理和出圃,且从经济效益上计算也是合理选择。其次选择好苗木的适宜栽植密度,为了早出圃(一般三、四年出圃)、出好苗,一般应选择株行距为60cm×80cm 比较适宜,
First, select the appropriate seedlings and planting density First, before breeding seedlings should choose no pests, the best diameter of 0.8cm or more. The reason is that the seedlings grow stronger after the stubble is planted, the trunk of the annual seedling should be thick and tall in the normal management so as to facilitate the management in the second year and the third year Out of nursery, and from the economic benefits is also a reasonable choice. Followed by a good choice of seedling planting density, in order to early nursery (usually three or four years out of nursery), a good seedlings, the general line spacing should be selected 60cm × 80cm more appropriate,