施肥对尾巨桉林分生长和分化的影响

研究了施肥对龙岩市新罗区6年生尾巨桉林分生长和分化的影响,结果表明：以基肥施钙镁磷肥500 g·穴-1,追施钙镁磷复合肥150 g·株-1、（NH4）2HPO4250 g·株-1、尿素100 g·株-1;第2年追施（NH4）2HPO4500 g·株-1;第3年追施（NH4）2HPO4500 g·株-1的施肥效果最佳。施...

Effects of fertilization on the growth and differentiation of Eucalyptus grandis×E.urophylla stand

In view of the reality of blind fertilization in the production process of Eucalyptus grandis×E.urophylla plantation in Longyan City,the effects of fertilizer on the growth and differentiation of six year-old E.grandis×E.urophylla plantatios in Xinluo District were investigated.Main results showed that,the best fertilizing effect was obtained in the treatment that every tree had 500 g base fertilizer which contained Ca,Mg,P elements,then additional with 150 g compound fertilizer that contained Ca,Mg,P elements,250 g（NH4）2HPO4,100 g（NH2）2CO,and additional fertilization with 500 g（NH4）2HPO4 in the second year,500 g（NH4）2HPO4 in the third year.The number of the trees whose diameter at breast height was more than the average level increased obviously in E.grandis×E.urophylla plantation which was fertilized,and positive differentiation of the plantation became obvious.It would be good for the cultivation of big-diameter timber in E.grandis×E.urophylla plantation,if intermediate cutting timely.