摘要
在广西壮族自治区国有三门江林场开展西南桦引种造林试验。参试品种2个,分别来源于热带林业中心、百色市西林县。通过测定西南桦树高、胸径、材积及蓄积量,观察抗病虫害能力、抗寒性以及开花结实情况,初步探索其生长适应性及丰产性。试验结果显示:17年生热带林业中心西南桦林分平均胸径20.10 cm、平均树高23.10 m、平均蓄积494.51 m3/hm2、年均蓄积生长量29.09m3/hm2;10年生百色西林县西南桦林分平均胸径14.63 cm、平均树高14.40 m、平均蓄积163.15m3/hm2、年均蓄积生长量16.32 m3/hm2,超过南方阔叶树速生丰产林指标(15 m3/hm2),表明在三门江林场该2个西南桦品种表现出较好的适应性和速生丰产性。
Two varieties of Betula alnoides from Center of Tropical Forestry and Xilin county,Baise city were used to conduct an experiment of introduction and afforestation in Sanmenjiang State-owned Forest Farm of Guangxi.The growth adaptability and prolificacy of Betula alnoides were explored preliminarily by measuring their tree height,diameter,stem volume and stand volume,and surveying their disease and insect resistance,cold resistance,flowering and fruiting.Results showed that the average tree height,diameter,total growing stock and annual growing stock of the 17-year-old Betula alnoides from Center of Tropical Forestry were 20.10 cm,23.10 m,494.51 m3/hm2 and 29.09 m3/hm2,respectively;and that of the10-year-old Betula alnoides from Xilin county,Baise City were 14.63 cm,14.40 m,163.15 m3/hm2 and 16.32 m3/hm2,respectively.The indexes of total growing stock of the two varieties far exceeded that of the southern broad-leaf trees(15 m3/hm2).The two varieties of Betula alnoides showed good adaptability,fast growth and prolificacy in Sanmenjiang State-owned Forest Farm of Guangxi.
作者
周燕
赵吉吉
韦泳丽
ZHOU Yan;ZHAO Jiji;WEI Yongli(Sanmenjiang State-owned Forest Farm of Guangxi,Liuzhou,545006,China)
出处
《农业研究与应用》
2020年第3期29-33,共5页
Agricultural Research and Application
关键词
西南桦
引种造林
初探
Betula alnoides
introduction and afforestation
primary study
