准噶尔盆地边缘两种树木个体生长规律的研究

Study on the Growth Law of Two Plant Species on the Edge of Junggar Basin

采用树干解析的方法,从树高、胸径、材积三方面初步揭示了小叶白蜡和白桦的个体生长发育规律。结果表明,小叶白蜡的高生长速生期比白桦早,但后期白桦的高生长明显大于小叶白蜡;同龄的两种树木,小叶白蜡的胸径值基本上都大于白桦;前10年白桦的材积稍大于小叶白蜡,但两种树木在十一年生的材积生长总量基本相等,小叶白蜡的材积生长总量将在十一年后明显大于白桦。试验初步阐明了小叶白蜡和白桦对生境条件的适应特征,为两种树木的经营和管理奠定了基础。

Using stem analysis methods,the growth and development law of Fraxinus bungeana DC.and Betula platyphylla Suk.individuals was studied from the aspects of tree height,diameter and volume.The results showed that the fast-growing stage of height growth of F.bungeana was earlier than that of B.platyphylla;while the height growth of B.platyphylla was significantly greater than that F.bungeana in later stages.The diameter of F.bungeana was larger than that of B.platyphylla of the same age.The volume of B.platyphylla was slightly larger than that of F.bungeana in the first 10 years,but was equal when they were 11-year-old,after which the volume of F.bungeana was significantly greater than B.platyphylla.The features of the two trees adaptating to their own habitats were clarified to lay the foundation for their operation and management.