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一、适时早造。进入四月,我区大多数树木经过一冬休眠,逐渐开始恢复生长。在这个时候栽树,幼树就会很快发出新根,从土壤中吸收水分和养料,满足幼树发芽、放叶等需要。如果栽植晚了,苗木在树芽开放前,还没有生根,随着天气逐渐变暖,树叶大量展开,枝叶蒸发水分和根系吸收水分不能达到平衡,苗木就会因缺水而生长不良,甚至干枯死亡。从土壤水分条件来说,春季,土壤水分的变化有一个一高一低的过程。随着气温的回升,天气变暖,土壤表层白天解冻,下层仍然固
First, timely and early creation. Into April, most of our area after a winter dormancy, and gradually began to resume growth. Planting trees at this time, saplings will soon issue new roots, absorb moisture from the soil and nutrients to meet the saplings, leaves and other needs. If planted late, the seedlings in the tree buds before opening, not rooting, as the weather gets warmer, the large number of leaves unfold, the evaporation of water content of the branches and leaves and the root can not be absorbed by the balance of water, seedlings will grow poor due to lack of water, or even dry death. From the soil moisture conditions, the spring soil moisture changes have a higher level and lower the process. As the temperature rises, the weather is warming, the surface of the soil is thawed during the day, and the underlying layers remain solid