我国中温带地区杨树丰产栽培模式

STUDY ON THE HIGH-YIELD POPLAR CULTIVATING PATTERN IN MIDDLE-TEMPERATE ZONE PLANTATION

本文报道了在我国中温带地区进行的杨树大面积丰产栽培模式产业化开发的研究 ( 1 993～ 1 998)。结果表明 ,在较寒冷干旱的辽宁 2 0 0 0hm2 林地上 ,采用良种良法 ,使造林成活率达到 97%以上 ,保存率达到95 7% ,幼林树高年平均生长 2 6～ 3 .0m ,胸径年平均生长 2 2～ 3 7cm ,创造了国内杨树大面积高产纪录 ;林粮间作经济效益良好。

The study on the high-yield poplar cultivating pattern in mid\|temperate zone in China was reported, which had been used for poplar industrial exploitation on a large scale in Liaoning Province. The results showed that the survival rate of planting amounted to more than 97%, the preservation rate of juvenile tree amounted to 95 7% in an area of 2000?hm\+2 located in the colder and arider forestland. The annual average height growth of the juvenile trees was 2.6～3.0?m, and the annual average growth of DBH was 2.2～3.7?cm, which set a high\|yield record of cultivating poplar in a big area in China. Meanwhile, the better economic benefits have been achieved from intercropping in such cultivation pattern of the high-yield poplar.