库布齐沙漠高大流动沙丘沙柳造林技术试验研究

通过对库布齐沙漠东北缘新月型沙丘段进行沙柳造林技术试验研究,得出如下结论：①分别用浓度为100 mg/L的ABT1号生根粉溶液和水对沙柳穗条浸泡处理后,进行扦插造林,3个月后调查结果表明,造林成活率比其对照分别提高了12.4%和10.1%;穗条细根发育数量提高28.2%和23.2%,对穗条分枝数、枝条高生长和基径生长影响不显著。②设置沙柳机械沙障与未设林地年风蚀土层厚分别为23.6 cm/a和95.8cm/a,设置沙障后土层风蚀量平均减少了75.4%,固沙效果十分明显。行列式林地土壤风蚀量与行距相关,行距2 m与行距4 m相比,风蚀量约降低16.1%。③穗条栽植数量每穴2条较每穴4条,造林成活率和幼林保存率分别提高近5.0%和50.3%,该地区选择坡度5°～15°的垂直于主风向的平缓坡面中、下坡位为造林适宜地。

Research on Afforestation Technology of Salix psammophila in High and Large Moving Dune in Kubuqi Desert

Based on the research on afforestation technology of Salix psammophila in high and large moving dune in Kubuqi desert,the result showed,① Soaked the seedlings of Salix psammophila with ABT 1 solution and water,the afforestation survival rate could be increased by 12.4% and 10.1%,the number of roots could be increased by 28.2% and 23.2% after planting for 3 months.② Annual amount of soil erosion with sand barrier was 23.6 cm/a,and the one was 95.8 cm/a without sand barrier.The amount of soil erosion was relative to line spacing.The amount of soil erosion with line spacing at 2 m was reduced by 16.1% than the one at 4 m.③ Compared with 2 cuttings and 4 cuttings in each hole,the survival rate and preserved rate of Salix psammophila seedlings could be increased by 5.0% and 50.3% separately.In this area,the middle and lower slope with the gradient from 5° to 15° could be chosen as the suitable terrain for Salix psammophila,which was perpendicular to the main wind direction.