鄂西北半干旱地区多季节造林技术研究

试验结果表明:鄂西北秋季造林比春季造林成活率可提高30%左右,差异显著;苗木高生长可提高1.6～6.0倍,地径生长变化不大;对于不同树种,中、晚秋造林成活率不同,针叶树种如湿地松、杉木等中、晚秋造林成活率变化不大,而阔叶树如刺槐、沙棘等晚秋造林成活率则明显高于中秋造林。因此,鄂西北地区造林应根据造林树种不同而选择相应的造林时间,尤其是阔叶树种应在10月中旬造林效果最佳,针叶树种造林时间可以提前到9月中旬。

Study on Afforestation Technique of Multi-season at Semi - drought Region of Northwest of Hubei Province

The result of test shows: afforestation survival rate raise by 30%, trees height growth raise by 1.6~6.0 times in autumn comparing with planting in spring in northwest of Hubei province, the difference is remarkable; survival rate is different between planting in mid-autumn and late autumn according to different tree species, survival rate of coniferous tree such as Pinus elliottii engelm and Couninghamia LanceoLata change less in mid-autumn than in late autumn. Meanwhile, survival rate of broad leaf tree such as Robinia Pseuidoacacia and Hippophae Rhamnoides raise obviously higher in late autumn comparing with mid-autumn. Therefore,selects suitable afforestation time based on different tree species in northwest of Hubei province, especially plant broad leaf tree in mid October shows the best result and planting coniferous tree can be done in mid-September.