杉木不同密度造林的经济效益分析

Analysis on Economic Benefit of Cunninghamia lanceolata Forest with Different Density

杉木不同密度造林试验，结果表明：造林密度每公顷4995株的林地，每公顷平均村积生长量为9．315m3,每公顷年均产值6408．90元。分另］是林龄27年、造林密度3600株／hm2林地的2．49倍和2．38倍；是林龄13年，造林密度3000株／hm2的1．66倍和1．67倍。试验证明在杉木分布区北缘的低山丘陵区，采用合理密植造林，集约经营的管理方式、缩短轮伐期，来提高林地的经济效益是切实可行的。

Experiment on forestation of Cunninghamia lanceolata with different density demonstrated that the average volume increment with density of 4995 Plant/hm2was 9. 315m3,the annual yield value topped 6 408. 9 yuan RMB, which was respectively 2. 49 and 2. 38 time of forest with 27 - years age and density of 3 600 plants/hm2, which was respectively 1. 66 and 1. 67 time of forest with age of 13 - years and density of 3 000 Plants/hm2. This experiment proved that rational compact planting, intensive management and short - rotation was feasible to increase economic benefit in the mountainous regions of Northern Chinese fir distribution area.