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杨树是我国重要造林树种,具有生长快,用途广,树形美观适应性强的特点,是用材林、防护林以及四旁植树的好树种。但是,杨树品种很多,特性各异,什么品种适宜盐碱地生长,是盐碱地造林中值得注意的问题。我县杨家园大队在天津地区农科所的协助下,从1966年开始,结合生产进行了盐碱地杨树优良品种的选育工作,八年来已从32个杨树品种的无性系中培育和选择出小×美12、小×美21和23、合作杨、白城杨、小青×钻、河小×旱+美、小×美+榆、波兰杂种194等较适合盐碱地栽培的8个优良品种。这8个杨树种、杂种的主要优点是:1.速生:1965年秋在土壤含盐量0～20厘米为0.6753%,20～50厘米为0.5300%,50～100厘米为0.2530%的盐碱地上,扦插的小×美×12,8年生平均高13.12米,平均胸径12.4
Poplar is an important afforestation species in our country. It has the characteristics of fast growth, wide application and beautiful tree adaptability. It is a good species of timber, shelterbelts and tree planting around. However, many poplar varieties, different characteristics, what kind of varieties suitable for the growth of saline-alkali land, saline-alkali afforestation is a noteworthy issue. With the assistance of Tianjin Academy of Agricultural Sciences, Yangjiayuan Brigade in our county started the breeding of fine varieties of poplar in saline-alkali land from 1966 onwards and has cultivated and selected from clones of 32 poplar varieties in the past eight years Small × the United States 12, small × the United States 21 and 23, cooperation Yang, Baicheng Yang, Xiaoqing × Drill, the river × dry + the United States, small × the United States + Elm, Polish hybrid 194 more suitable for cultivation of salt and alkali eight fine varieties . The eight poplar species, the main advantages of hybrids are: 1. Fast growing: the fall of 1965 in the soil salinity 0 to 20 cm to 0.6753%, 20 to 50 cm to 0.5300%, 50 to 100 cm to 0.2530% saline , Cuttings × United States × 12, 8-year-old average high 13.12 meters, the average diameter at 12.4