A research on seedling resistance of Pinus sylvestris var.mongolica in arid desert area

When seedlings of pinus sylvestris var. mongolica were bred by seeds and nursery stock in arid area, micro-environmental improvement by methods of seed and soil solutions could increase seedling survival rate. Seedlings being very sensitive to salt in soil, different salt contents had different influence, the soil salt content should be lower than 0.5 % when seedlings was bred in the field. The survival rate of seedlings covered by field soil and no cover in winter was 95 % and 36.8 % respectively. More windy weather and varied air temperature in desert area often form seedling physiological drought in spring, it was benefit for seedling surviving and growth that they were uncovered and watered in time when air temperature was stable in middle of April.