Effects of brassinolide on the growth of Pyrenaria spectabilis seedlings
In order to explore the effects of brassinolide(BR)on the growth of Pyrenaria spectabilis seedlings,1-year old Pyrenaria spectabilis wood seedling were used as material,different concentrations and spraying frequencies of BR were used to treat Pyrenaria spectabilis seedlings,0 mg/L was water treatment(CK),groups a,b,c and d were sprayed with 1,2,4 and 8 mg/L respectively,and were subdivided into subgroups 1 to 3(a-1 to a-3,b-1 to b-3,c-1 to c-3 and d-1 to d-3)according to spraying frequency(twice a week,once a week and once every two weeks),respectively.The optimal combination of spraying frequency and concentration was determined by measuring seedling height,ground diameter and crown width.The results showed that proper application of BR could promote the growth of Pyrenaria spectabilis seedlings,and significantly increase the seedling height,ground diameter and crown width.The best treatment combination was c-3(4 mg/L,once every two weeks),and the seedling height under this treatment was 25.43 cm,which was 14.16 cm higher than CK,with a growth rate of 125.64%.The ground diameter was 3.66 mm,2.13 mm higher than CK,with a growth rate of 139.22%.The crown width was 5.15 cm,which was 1.68 cm more than CK,the increase was 48.41%.This study provides a reference for the efficient cultivation of Pyrenaria spectabilis at seedling stage.
万方数据
维普
