不同抚育方式对杉木幼林生长的影响

Effects of Different Tending Methods on Growth of Young Cunninghamia lanceolata Plantation

[目的]为杉木人工林的经营管理提供指导。[方法]对3种不同抚育方式(全面铲草、铲草+化学除草、割草+施肥)下杉木幼林的生长量及抚育成本进行比较,确定其最佳抚育方式。[结果]3种抚育方式下,杉木幼林的平均树高分别为3.8、5.0、4.2m,平均胸径分别为5.0、6.4、5.3cm;铲草+化学除草抚育方式杉木幼林的单株材积最高,达0.00970m3,分别为全面铲草和割草+施肥抚育方式杉木幼林单株材积的2.29和1.66倍;割草+施肥抚育方式投资最高(4900元/hm2),其次为全面铲草抚育方式(3600元/hm2),铲草+化学除草抚育方式投资最少(2250元/hm2)。[结论]南方林区杉木幼林的最佳抚育方式为人工除草+化学除草。

[ Objective ] The study was to provide the guidance for management of Cunninghamia lanceolata plantation. [ Method ] The growth increment and tending costs of young C. laneeolata plantation in 3 tending methods （ completely weeding, handed weeding ＋ chemical weeding, mowing ＋ fertilizing） were compared, and then the optimum tending method was determined. [ Result] In 3 tending methods, the average height of young C. lanceolata plantation were 3.8, 5.0, 4.2 m resp. , and their average dbh were 5.0, 6.4, 5.3 em resp.. The individual volume of young C. lanceolata plantation with tending method of handed weeding ＋ chemical weeding was the highest, reaching 0. 009 70 m3 , being 2.29 and 1.66 times of that of young C. lanceolata plantation with tending methods of completely weeding and mowing ＋ fertilizing. The investment of tending method of mowing ＋ fertilizing was the highest （ being 4 900 yuan/hm2 ）, the following was that of tending method of completely weeding （ 3 600 yuan/hm： ）, and that of tending method of handed weeding ＋ chemical weeding was the lowest （ 2 250 yuan/hm2 ）. [ Conclusion ] The optimum tending method for young C. lanceolata plantation in southern forest region was handed weeding ＋ chemical weeding.