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众所周知,土壤——气候条件不仅决定了森林的组成、结构和生产量,而且也决定着树木生长期的长短和生长能量的大小。对于生长在苏联欧洲部分和西伯利亚地区的某些树种的季节生长特性,曾进行过很多研究。但对生长在马加丹省的树木却很少研究。我们对兴安落叶松、西伯利亚云杉、欧洲松以及雪松等四个树种进行了研究。它们均生长在冲积而成的河滩地的轻粘土上。高2—3米。欧洲松为直播,穴距1.5×1.5米;云杉为人工栽植,落叶松和雪松为野生幼树。试验于1975年的无霜期内进行。每个树种选出3—4标准株。每5个昼夜测量一次。每次测主梢及2—3根侧枝的长度,另加测树高1/2处的直径。在此期内,每天测
It is well-known that soil-climatic conditions not only determine the composition, structure and production of forests, but also determine the length of tree growth and the amount of growth energy. Much research has been conducted on the seasonal growth characteristics of certain tree species growing in the European parts of Russia and in Siberia. However, there is little research on the trees that grow in Magadan province. We studied the Larix gmelinii, Siberian spruce, Pinus thunbergii and Cedar tree species. They all grow on the light clay of alluvial floodplains. 2-3 meters high. European pine live broadcast, hole distance 1.5 × 1.5 m; spruce artificial planting, larch and cedar for the wild saplings. The experiment was conducted during the frost-free period in 1975. Select 3-4 standard strains for each tree species. Measure every 5 days and nights. Each test of the main shoot and the length of 2-3 lateral branches, plus measuring the height of the tree 1/2 at the diameter. In this period, measured daily