湘南"常寒 1号"桉树萌芽更新规律研究

[Objectives]study the relationship among many growth indexes Systematically of"Changhan No.1"plantation in South Hunan.[Methods]This paper analyzes the correlation between the number of sprouts and the average number of sprouts at each sprout point,as well as the correlation between the total number of sprouts,the number of sprouts at each sprout point and the partial growth index of the main sprouts.The single factor variance analysis method is used to explore the influence of different levels of cutting pile height and diameter treatment on the number of sprouts,the location of sprouts and the location of the main sprouts,And the effect of different position level on the number of sprouts at the sprouting point;the interaction of pile height and pile diameter on the total number of sprouts,length of main sprouts at each stage,diameter growth and other factors of felling pile was explored by using the method of multi factor variance analysis.[Results](1)There is no significant correlation between the number of sprouts on a cutting pile and the average number of sprouts on each sprout point;(2)there is no significant correlation between the total number of sprouts on a cutting pile and the diameter of the main sprouts,but there is a significant negative correlation between the total number of sprouts on a cutting pile and its length;(3)there is no significant correlation between the number of sprouts on a certain sprout point and the diameter of the main sprouts on that sprout point,but there is also a significant negative correlation between the number of sprouts on a cutting pile and its length;(4)the number of sprouts on a cutting pile is related to With the increase of the treatment level,the number of buds in the upper part was significantly higher than that in the middle part and the lower part,but the effect of diameter treatment was not significant;(5)the number of buds in the upper part was significantly higher than that in the middle part and the lower part;(6)the height and diameter treatment of the cutting piles had no significant effect on the height and diameter growth of the buds after the stem was fixed,but it had no significant effect on the height and diameter growth of the buds on the upper part The total number of sprouts had a significant effect.[Conclusion](1)The number of sprouts will not decrease because of the increase of sprouts,and the total sprouts of sprouts and stumps will change synchronously;(2)the increase of the number of sprouts on both stumps and single sprout will inhibit the growth of the length of the sprouts,but has no significant effect on the diameter growth;(3)the higher stumps have more sprouts and sprouts,but the height reaches 30cm In the above case,the trend is weakened;the stump with a diameter of 12～18cm has the most number of sprouts and sprouts;(4)compared with the middle and lower part,the sprout on the upper part of the stump can produce more sprouts because of more growth space and light;(5)after the establishment of the plant,the main sprout is removed from competition,and its height and diameter growth are no longer affected by the height and diameter of the stump;(6)comprehensive theory Compared with the production practice,it is more scientific and reasonable to keep the cutting pile with a height of about 10～15cm,which is more conducive to the germination and regeneration.