育苗密度对松树成活率和生长的影响

Effect of Seedling Density on Survival Rate and Growth of Pinus

为探究不同育苗密度对松树成活率和生长的影响。以广西博白县为试验地点,设置100株/m^(2)、200株/m^(2)、400株/m^(2)、800株/m^(2)、1 200株/m^(2)等不同育苗密度,比较不同育苗密度下松树1 a生幼苗的存活率以及生长状况。结果显示:适宜的育苗密度可以促进松树的生长,过低或过高的密度都会其生长状况产生不良影响;总体上400株/m^(2)育苗密度条件下的松树生长效果较好,此条件下松树幼苗存活率最高,株高与根长相对较高,1级苗木占比最高为62.95%,2级苗木占比为30.15%,3级苗木仅占比6.90%。

To explore the effects of different seedling density on the survival rate and growth of Pinus.Four different seedling densities were set up in Bobai County to compare the survival rate and growth status of 1-a-born Pinus seedlings under different seedling densities.The results showed that suitable seedling density could promote the growth of Pinus,but too low or too high density would have adverse effects on its growth.In general,under the condition of seedling density of 400 plants/m^(2),the growth effect of Pinus is better.Under this condition,the survival rate of Pinus seedlings is the highest,the plant height and root length are relatively high,and the proportion of first-grade seedlings is 62.95%,that of second-grade seedlings is 30.15%,and that of third-grade seedlings is only 6.90%.