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胡杨是荒漠盐碱地上的优良造林树种,其根系发达,耐旱耐寒,在含盐量0.6～2％的盐化土壤上仍能正常生长。但胡杨生长缓慢,材质韧性强,一般幼苗年高生长0.4～1米左右,径生长0.4～0.8厘米,短期内不能起到治碱改土和防护效应。采用嫁接的方式培育既抗盐碱又速生的胡杨+新疆杨优良组合苗木,可以扬长避短,提高其利用率。尤其在银北地区那些盐碱较重的地段上造林有重要意义。因此我们采用不同嫁接方式进行试验,共嫁接2000余株,平均成活率74.5％,最高88.4％,初获成功。从而为治理盐碱地提供了一个新措施。现总结如下:
Populus euphratica is a good afforestation tree species in the desert saline-alkali soil. Its root system is well developed, tolerant to drought and hardy, and it can still grow normally on salinized soil with salt content of 0.6-2%. However, Populus euphratica growth is slow, strong material toughness, the general growth of seedlings about 0.4 to 1 meter high, 0.4 to 0.8 cm in diameter growth in the short term can not play a role in Alkali soil improvement and protection. Grafting ways to cultivate both saline-alkali and fast growing poplar + Xinjiang Yang excellent combination of seedlings, can avoid weaknesses and improve their utilization. Especially in the northern part of the area of saline-alkali heavier afforestation is of great significance. Therefore, we use different grafting methods for testing, a total of more than 2000 grafts, the average survival rate of 74.5%, the highest 88.4%, the initial success. Thus for the treatment of saline and alkali provides a new measure. Now summarized as follows: