摘要
对雷州林业局 7种施肥处理的尾叶桉MLA无性系 7年生与 3年生林分进行经济效益分析 ,结果表明 :最佳处理 6 (P30 0 g/株 +K30 0g/株 +N15 0 g/株 ) 7年生时年均利润 15 2 8.1元 /hm2 ,比处理 7(常规施肥 ,滤泥 5 0 0 0g/株 +P2 5 0 g/株 +K10 0 g/株 +N10 0 g/株 ,年均利润 14 5 2 .6hm2 )提高 5 .2 % ,比对照 (不施肥 ,年均利润 6 30 .3元 /hm2 )提高 14 2 .4 % ;3年生时处理 6的年均利润为 16 0 5 .5元 /hm2 ,比处理 7(年均利润 14 0 6 .8hm2 )提高 14 .1% ,比对照 (年均利润 4 0 8.3元 /hm2 )提高 2 93.2 % ;处理 6的年均利润 3年生时采伐比 7年生时采伐提高 5 .1% ;处理 6和处理 7在 7年生时采伐 ,投资回收期均为 10 .3年 ,在 3年生时采伐分别为 8.0年与 8.3年 ,3年生时采伐比 7年生时采伐的投资回收期分别缩短 2 .3年与 2 .0年。
The Experimental forest of MLA Eucalyptus urophylla clone was planted at Leizhou Forestry Bureau in 1993 under 7 fertilizer level. The forest was measured at 3 and 7 years old. Its economic benefit analysis results show that: The best treatment which have the most economic benefit are treatment 6 (P 300 g/tree + K 300 g/tree + N 150 g/tree), its annual profit are 1528.1 yuan/hm 2 at 3 years old and 1605.5 yuan/hm 2 at 7 years old, which increased 5.2% and 14.1% than that of treatment 7, and increased 142.4% and 293.2% than that of treatment 1 (not fertilize). If the rotation are 3 years, the payout period of treatment 6 and treatment 7 are 8.0 and 8.3 years, while its all are 10.3 years if the rotation are 7 years. So if the rotation are 5 years, the forest could have the more benefit and the payout period could reduce 2.3 and 2.0 years for treatment 6 and 7 respectively.
出处
《广东林业科技》
2003年第2期1-4,共4页
Forestry Science and Technology of Guangdong Province
