雷州半岛尾细桉人工林对不同抚育营林模式的生长响应分析  

Effects of Tending Measures on Growth of Eucalyptus urophylla×E.tereticornis Clonal Plantations in Leizhou Peninsula

作　　者：陈马兴 李孔生 陆海飞 何普林 李光友[2] 徐其贤 李华强 欧生 戴寿祥 CHEN Maxing;LI Kongsheng;LU Haifei;HE Pulin;LI Guangyou;XU Qixian;LI Hua-qiang;OU Sheng;DAI Shou-xiang(China Forestry Group Leizhou Forestry Bureau Group Co.Ltd.,Zhanjiang 524043,Guangdong,China;Research Institute of Tropical Forestry,CAF,the Key Laboratory of National Forestry and Grassland Administration for Tropical Forestry Research,Guangzhou 510520,Guangdong,China)

机构地区：[1]中林集团雷州林业局有限公司,广东湛江524043 [2]中国林业科学研究院热带林业研究所,热带林业研究国家林业与草原局重点实验室,广东广州510520

出　　处：《桉树科技》2021年第2期1-8,共8页Eucalypt Science & Technology

基　　金：“十三五”国家重点研发计划课题“桉树高纤维纸浆材定向培育技术研究”(2016YFD0600503);中国林业科学研究院基本科研业务费专项“桉树速生抗风、耐寒优良品种选育研究”(CAFYBB2017ZA001-5);“热带及南亚热带人工林树种良种选育研究”(CAFYBB2018SZ002)。

摘　　要：揭示不同抚育措施对尾细桉人工林的生长影响,为雷州半岛尾细桉纸浆林培育提供理论依据。以雷州林业局纪家林场尾细桉无性系林为研究对象,采用5种抚育经营模式,连续2年对不同抚育措施集成模式样地进行观测,通过生长性状、投入产出的比较分析,获得不同模式下的生长及其营林效果。在5种抚育措施集成模式中单位面积蓄积和单位面积蓄积增量均以模式1>模式3>模式2>模式4>模式5,以模式1的中耕不施生物肥为最佳,单位面积蓄积增量比对照模式5提高34%~52%;两个年度单位面积蓄积的连年增长量排序不同,生物肥对第2年的增长影响更大,以模式2和3增长最大。5种模式下现时经济效益排序均以模式1>模式4>模式3>模式2>模式5,以模式1为最佳,比对照模式5提高25.72%~50.86%;模式1是具有推广潜力的营林模式,亦即保证常规抚育施肥的基础上,合理的土壤扰动最有利于林分生长。研究表明尽管施生物肥能促进林分生长和提高林木抗逆性,但受限于生物肥的价格,倘若生物肥市场价格合理的情况下,模式3和2仍然值得关注。This study examines the effects of different tending measures on the growth of Eucalyptus urophylla×E.tereticornis plantation in order to provide a theoretical basis for the cultivation of Eucalyptus plantations on the Leizhou Peninsula.Taking E.urophylla×E.tereticornis plantations in Jijia forest farm of Leizhou Forestry Bureau as the research objects,growth following five tending modes were observed for two consecutive years in sample plots.Through comparative analyses of growth characters,the growth and economic benefits under different modes were evaluated,and the effects of different tending modes were evaluated.Among the five tending modes,the growth order of volume per hectare and CAI(current annual increment per hectare)were as follows:mode 1>mode 3>mode 2>mode 4>mode 5.Tending mode 1 was the best and involved mechanical tillage without applying biological fertilizer,and among different tending modes the unit area increment was 34%~52%higher than that of control treatment(tending mode 5).Biological fertilizer used in tending modes 2 and 3 had a greater impact on the volume growth during the second year when compared to tending mode 1.Under the five modes,the current economic benefit order was as follows:mode 1>mode 4>mode 3>mode 2>mode 5,with benefits of different modes being 25.72%~50.86%higher than that of control mode 5.Overall,the results showed that conventional tending and fertilization,which involved reasonable soil disturbance,was most conducive to stand growth.However,use of biological fertilizers can promote stand growth and improve stress resistance,although current prices for biological fertilizer will likely limit its use on a larger scale.If the cost of bio-fertilizer is reduced in the future,then tending modes 3 and 2 will likely become more economically viable.

关 键 词：抚育施肥 尾细桉无性系 雷州半岛 单位面积蓄积量 连年增长量 

分 类 号：S753.5[农业科学—森林经理学]