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材料和方法选择兴安、华北落叶松、紫丁香、杨、柳无性系繁殖(1-0)苗为试验材料. 用三十烷醇(C_(30)H_(61)OH)对苗木进行叶面喷雾、注干的方法施药.浓度为0.1-1 PPm,喷雾量每次每平方米28克左右.施药时间在6月20日至7月20日(即落叶松幼苗进入速生期前和生长前期). 注干在7月3日进行,用微量进样注射器,注射量0.0005毫升/株,浓度分别为0.01、0.05、0.1、1 PPm. 施药时期的气象因子:日平均气温25.1℃,日平均相对湿度63%,日平均照度53、250Lux,风向南(S),风速8.8米/秒.
MATERIALS AND METHODS: The seedlings of Larix principis-rupprechtii, Larix principis-rupprechtii, Lilium sibiricum, Populus davidiana and Liu-clonal clonal (1-0) seedlings were used as the experimental materials.The seedlings were treated with triacontanol (C_ (30) H_ (61) OH) Spraying, injection method of spraying the concentration of 0.1-1 PPm, 28 grams per square meter of spraying the amount of spraying time from June 20 to July 20 (ie larch seedlings into the fast-growing period and Note that the dry injection on July 3, with a micro injection syringe injection volume of 0.0005 ml / concentration, respectively, 0.01,0.05,0.1,1 PPm. Meteorological factors during the application period: the average daily temperature of 25.1 ℃ , The average daily relative humidity of 63%, the average daily illumination of 53,250 Lux, the wind south (S), the wind speed of 8.8 m / s.