华北油松人工林的透流、干流和树冠截留

在1984年生长季对河北隆化碱房林场28年生油松人工林的透流、干流和树截载留进行了研究。结果表明:在该林分中透流、干流和树冠截留均与降水量密切相关。一年中,随叶量增加,透流率和干流率减少,树冠截留率增加。生长季透流总量为:1号标准地(郁闭度0.7)占降水量的69.7％,4号标准地(郁闭度0.4)占降水量的80.4％;两块标准地的总干流量分别为降水量的22.5％和16.5％。并对应用Gash模型估计林冠截留量进行了讨论。

THROUGHFALL, STEMFLOW AND CANOPY INTERCEPTION IN A PINUS TABULAEFORMIS PLANTATION OF NORTH CHINA

From June to beginning of October in 1984, the throughfall, stemflow and canopy interception in a 28 years-old Pinus tabulaeformis plantation have been studied in Longhua county of Hebei province. The results indicate that throughfall, stemflow and canopy interception in that stand were all closely correlated with the rainfall in that period. The percentage of throughfall and that of stemflow decreased, but that of canopy interception increased with the increased of foliage in that year. In sample plot No. 1, (crown density 0.7) the total amount of throughfall during the period of observation was 69.7% of the rainfall and that for sample plot No. 4, (crown density 0.4) was 80.4%. In sample plot No. 1 the total amount of stemflow was7.8% and that for sample plot No. 4 was 3.1%. The total amount of canopy interception for sample plot No. 1 was 22.5% and for sample No. 4 was 16.5%. The use of Gash model to estimate the canopy interception was found to be adequate for our data.