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干旱地区有不少造林地的地下水位在1~3m,地下水矿化度≤1.5g/L,土壤含盐量≤0.2%~0.4%。在这样的立地条件深栽杨树,可以利用深层土壤水分,在不灌溉的情况下,获得50%以上的高成活率,效益显著。通过生产实践和设置试验,总结出了适用的深栽抗旱造林技术和选地的要求,揭示了深栽杨树的生根特点,及其对造林成活率和幼林生长正面影响。
In arid areas, the groundwater level of many afforestation land is 1 ~ 3m, the salinity of groundwater is less than or equal to 1.5g / L, the salinity of soil is less than 0.2% ~ 0.4%. Deep planting of poplar under such site conditions can make use of deep soil moisture and achieve a high survival rate of more than 50% without irrigation, resulting in significant benefits. Through the practice of production and setting test, the suitable deep planting drought resistance afforestation technology and the requirements of the site selection are summarized. The rooting characteristics of deep planting poplar and its positive impact on afforestation survival rate and young forest growth are revealed.