指数施肥杉木实生容器苗造林生长对比研究

A comparative study on afforestation growth of container seedlings of Cunninghamia lanceolata with exponential fertilization

为研究不同施肥处理杉木容器苗对当年造林效果的影响,2019年3月1日笔者采用6种不同施肥处理培育的杉木实生容器苗木造林,即3个指数施肥培育苗木(A处理苗木,30 mg·株^-1、B处理苗木,60 mg·株^-1、C处理苗木,120 mg·株^-1),2个常规施肥培育苗木(等量施肥D处理苗木,60 mg·株^-1、1次性施肥E处理苗木,60 mg·株^-1)另设对照(CK)。在上山造林10个月后,测定树高和地径,测算树高和地径的同比增长,研究各施肥处理苗木造林生长状况。结果表明:指数施肥B处理苗木(60 mg·株^-1)、指数施肥C处理苗木(120 mg·株^-1)造林生长最优,树高分别为81.5 cm、83.1 cm,相对CK分别增长了51.2%、54.2%;地径分别为13.5 mm、13.9 mm,相对CK分别增长了53.4%、58.0%。

In order to study the effect of different fertilization treatments on the afforestation effect of container seedlings of Cunninghamia lanceolata,on March 1,2019,the author used six different fertilization treatments to cultivate the seedlings of Chinese fir,that is to say,three indexes were applied to cultivate seedlings(A treatment,30 mg per plant、B treatment,60 mg per plant、C treatment,120 mg per plant),two conventional fertilization treatments were used to cultivate seedlings(equal amount of fertilization D treatment,60 mg per plant、one time fertilization E treatment seedlings,60 mg per plant),another control(CK).After 10 months of afforestation,the height and ground diameter of trees were measured,measure the year-on-year growth of tree height and ground diameter,and study the growth status of seedlings under different fertilization treatments.The results show that:the seedlings treated with index fertilization(60 mg per plant)B and index fertilization(120 mg per plant)C had the best afforestation growth,with tree height of 81.5 cm and 83.1 cm,respectively,increasing 51.2%and 54.2%relative to CK,and ground diameter of 13.5 mm and 13.9 mm,respectively,increasing 53.4%and 58.0%relative to CK.