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本研究从３个方面研究了苗木的生根、生长状况。由于树种特性不同，造林苗木生根分为３类，即细根生根类，细根、粗根生根类，细根、粗根和苗干都能生根类。研究表明，造林苗木生根的决定因素是苗木的活根数量（针叶树是活细根）。活根数量不仅决定苗木成活，而且影响成活后的生长状况。苗木生新根的外部条件是土壤温度、土壤水分、土壤空气。与此同时，空气温度和相对湿度对苗木生根也有一定的影响。
This study studied seedling rooting and growth from three aspects. Due to the different characteristics of the tree species, the rooting of seedlings is divided into three categories, namely fine rooting, fine rooting, coarse rooting, fine rooting, thick rooting and seedling rooting. Studies have shown that the determinant of rooting of seedlings is the number of live roots of seedlings (conifers are living fine roots). The number of live roots not only determines the survival of seedlings, but also affects the growth status after survival. The external conditions of nursery root are soil temperature, soil moisture and soil air. At the same time, the air temperature and relative humidity have some influence on the seedling rooting.