香樟和猴樟1年生播种苗的生长发育规律

Study on the growth pattern of Cinnamomum camphora Presl and Cinnamomum bodinieri Levl annual seedling

用有序样本聚类分析法划分了香樟Cinnamomum camphora Presl、猴樟Cinnamomum bodinieri Levl 1年生播种苗生长时期.结果表明,两树种出苗期、幼苗期和速生期时间一致,分别为3月6日～5月15日、5月16日～7月15日和7月16日～9月15日.但两树种苗木硬化期持续时间不同,香樟为9月16日～10月15日,猴樟为9月16日～11月15日,其生长期比香樟长1个月.香樟、猴樟均属典型的主根发达树种,主根生长与苗高、地径生长交替进行,但香樟各时期不同指标增长、各指标的总生长量均比猴樟小.针对两树种苗木生长特点的不同,提出了相应的苗期管理技术措施.

The sequence sample cluster analysis is used to divide the height growth process of C.camphora Presl and C. bodinieri Levl annual seedlings. The results indicated that the juvenile stage,the early growth stage and the rapid growth stage of two seedlings were consistent. The juvenile stage was from March 6 to May 15,the early growth stage from May 16 to July 15, and the rapid growth stage from July 16 to September 15. The late growth stages of them were different , the C.camphora Presl seedling was from September 16 to October 15, but the C.camphora Presl seedling was from September 16 to November 15. The growth period of C.bodinieri Levl seedlings were longer than C. camphora Presl seedlings. Two seedlings have developed main-root, their height,diameter and root growth intercross each other . The monthly growth,gross growth of all indexes in C.camphora Presl seedlings were smaller than C.bodinieri Levl seedlings.The mangemant measures of two seedlings were proposed respectively according to their growth characters.