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杨树是营造农田防护林带,用材林及四旁绿化的主要速生树种。杨树林地占我县林地总面积的百分之九十五以上。文化大革命以前,全县只有小青杨、小叶杨、加拿大杨等寥寥几种。文化大革命后,尤其是一九七一年以来,杨树新品种被全县各地广泛引种和栽培。据初步调查,引进我县的杨树新品种已有五十多种。近二年来,经苗圃选择,幼林地鉴定,虽已淘汰了一些不适应新民地区生长的品种,但截至目前止,仍有近二十余种为我县各地广泛栽培利用。这些新品种都具有生长快,易成活,繁殖力强,成林早的
Poplar is to create farm shelterbelts, timber and green trees around the main fast-growing tree species. Poplar woodland accounts for more than 95% of the total area of woodland in our county. Before the Cultural Revolution, there were only a handful of Young Poplars, Populus simonii and Young Poplars in the county. After the Cultural Revolution, especially since 1971, poplar varieties have been widely introduced and cultivated throughout the county. According to a preliminary investigation, more than 50 varieties of poplar have been introduced into our county. In the past two years, nursery selection, young woodland identification, although some have not eliminated the varieties of Xinmin growth, but so far, there are still more than twenty species widely used around the county for cultivation and utilization. These new varieties are fast growing, easy to survive, fertility, and forest early