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种子产量预测是在植物开花、子房形成和果实或种子成熟前进行的。两年来,我们曾采用平均标准木法,径级代表木法,标准枝法进行测定,并以全林采集为对照,其结果与实际产量相差较大,尤以平均标准木法相差最大。现将我们于1957—1958年在四川省南部峨眉县木瓜村所作的两种测定种子产量的方法介绍如下:
Seed yield prediction is carried out before flowering, ovary formation and fruit or seed maturation of plants. In the past two years, we have adopted the average standard wood method, the diameter class representative wood method, the standard branch method for determination, and the whole forest collection as a control, the results differ greatly from the actual yield, especially the average standard wood method is the biggest difference. We now introduce the following two methods for determining the yield of seeds we made in Papaya Village, Emei County, Sichuan Province in 1957-1958: