加拿大杨(Populus canadensis)目前生长上都采用插条育苗法,但各地使用插穗的长短、粗细、扦插的密度和方法,都有所不同,因而苗木的质量和产量也有很大的差别。为了提高苗木的产量和质量,作者于1961年在西北农学院林业站苗圃中进行了加杨插条育苗的研究。试验内容包括:插穗长度,粗度,扦插密度和扦插方法四部分。经过一年的观察研究,初步得出一些成果,茲介绍于后,以供育苗工作者的参考。一、试验方法和苗木抚育试验研究用的种条,是采用一年生的插条苗 Populus canadensis currently grows with the use of cuttings and seedlings, but the length, thickness, cuttings density and method of cuttings used vary from place to place, and the quality and yield of seedlings vary widely. In order to improve the yield and quality of nursery stock, the author conducted the research of raising Yang cuttings at the forestry station nursery of Northwest Agricultural College in 1961. The test includes: cutting length, thickness, cutting density and cutting four parts. After a year of observational studies, some preliminary results have been obtained, which are hereby presented for reference by breeding workers. First, the test methods and nursery stock test study with the species, is the annual cuttings