【摘 要】
：
一、试验内容和方法 (一)试验地概况试验地设在兰州市东岗镇大青山本所试验基地。年平均降雨量326毫米,年平均蒸发量1470毫米,为降雨量的4.5倍。年平均气温9.4℃,绝对最高温
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一、试验内容和方法 (一)试验地概况试验地设在兰州市东岗镇大青山本所试验基地。年平均降雨量326毫米,年平均蒸发量1470毫米,为降雨量的4.5倍。年平均气温9.4℃,绝对最高温度39.1℃,绝对最低温度-28.2℃。初霜期9月下旬,晚霜期5月上旬,无霜期为188天。圃地为轻粘壤土,PH值为8.0。 (二)种条来源与种条处理种条采自兰州市安宁区咸水沟河北杨天然林一年生根蘖苗。插穗长25厘米,其处理方法如下:
First, the test content and methods (A) the test site The test site is located in the test base of Daqingshan Benqiu, Donggang Town, Lanzhou City. The average annual rainfall of 326 mm, the average annual evaporation of 1470 mm, 4.5 times the rainfall. The annual average temperature of 9.4 ℃, the absolute maximum temperature of 39.1 ℃, the absolute minimum temperature of -28.2 ℃. Early frost period in late September, early frost in early May, frost-free period of 188 days. Nursery light clay loam, PH value of 8.0. (B) of the sources of species and seed treatment Seeds were collected from Lanzhou, Lanzhou Anlin District, Hebei annual natural spring root tillering. Cuttings 25 cm long, its treatment is as follows:
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