摘要
为研究不同生境赤皮青冈的种子萌发及苗期的生长规律。对不同生境的赤皮青冈的年生长节律进行连续观察,采用Logistic方程对苗高的生长动态过程进行拟合,进而获得Logistic模型,划分生长时期。苗圃地的萌发时间为5月27日,比野外的提早一个多月,且幼苗出土率也高于野外,在野外山地,母树林内的赤皮青冈幼苗出土率和保存率最高;苗圃地的赤皮青冈幼苗全年苗高平均值为29.1 cm,远高于野外山地的幼苗苗高平均值。不同生境的赤皮青冈幼苗高的实测数据曲线与拟合曲线基本吻合,生长曲线为典型的“S”型,6个生境的相关系数均达到0.95以上,回归性均达到极显著水平,并将幼苗苗高的生长进程准确地划分为生长前期、速生期和生长后期。在今后的赤皮青冈幼苗管理中,建议在播种后40 d~60 d增加水肥管理,在正午时分盖上遮阳网,创造适宜的条件,以提高后期移栽的成活率。
In order to study the seed germination and seedling growth of Cyclobalanopsis gilva in different habitats,the annual growth rhythm of C.gilva in different habitats was continuously observed,and the logistic equation was used to fit the growth dynamic process of seedling height,and then the Logistic model was obtained to divide the growth period.The results showed that the germination time of the nursery field was May 27th,more than a month earlier than that in the wild,and the seedling emergence rate was also higher than that in the wild.In the wild mountainous land,the emergence and preservation rate of C.gilva seedlings in the mother forest was the highest;The annual average seedling height of C.gilva seedlings in the field was 29.1 cm,which was much higher than the average seedling height of the wild mountain seedlings.In different habitats,the measured data curves of C.gilva seedling height were basically consistent with the fitting curves,and the growth curve was a typical"S"shape.The correlation coefficients of the 6habitats were all above 0.95,and the regression was extremely significant.The growth process of seedling height can be accurately divided into early growth stage,fast growth stage and late growth stage.In the future management of C.gilva seedlings,it is recommended to increase water and fertilizer management 40-60 days after sowing,and cover the sunshading nets at noon to create suitable conditions to improve the survival rate of later transplanting.
作者
陈国兴
CHEN Guoxing(Jian’ou Forestry Bureau,Jian ou 353100)
出处
《四川林业科技》
2022年第4期117-123,共7页
Journal of Sichuan Forestry Science and Technology
基金
福建农林大学科技发展金及科技创新专项—赤皮青冈促萌和壮根培育技术研究(CXZX2017110)
福建省科技厅—高校产学合作科技重大项目:赤皮青冈优良种质选择与高效栽培技术(2016N5003)。
