Study on the Effect of Fertilization on Eucalyptus globulus Plantation in Yunnan

fertilization tests of different match and ratio of N,P,K were conducted on young Eucalyptus globulus plantation in limestone red soil in Baoshan City for 5 years. The results of tests indicated that fertilization obviously promoted the growth of young E. globulus plantation. At 1.5 years after afforestation,the growth response was at the highest point,the height and DBH of the tree were promoted by 33.69%,48.39% for the 9 manuring treatments. At 5 years after afforestation,the growth response were promoted by 16.45%,10.71% for the 9 manuring treatments. Phosphoric fertilizer is the main factor in promoting the growth of E. globulus plantation.Applying 430 g calcium magnesium phosphate as base fertilizer for each tree,can make the best growth response. The growth responses of N,K fertilizer is not obvious. Organic fertilizer can promot the growth of the trees. Among the 10 treatments,the 3 treatments of No.6 (65 g carbamide,430 g calcium magnesium phosphate),No.9 (130 g carbamide,430 g calcium magnesium phosphate ,54 g KCl),No.10 (treatmet No.9 added with 5 kg organic fertilizer) gained remarkable growth effect. The treatments with best economic benefit are No.6 and No.9.