江汉平原美洲黑杨不同密度扦插育苗试验研究

Experiment of Populus deltoides Cutting Seedling of Different Density in Jianghan Plain

以江汉平原杨树新品种华石2号杨为试验材料,开展5种不同密度扦插育苗试验。结果表明,华石2号杨在5种育苗密度中,40 cm×50 cm的苗木生长量最佳,其次是20 cm×90 cm。不同密度无论是一根一干,还是两根一干,密度40 cm×50 cm与20 cm×90 cm之间对苗木生长量的影响差异不显著。在一根一干与两根一干生长期内,结合苗木质量等级、育苗成本等因素,推荐江汉平原杨树育苗密度采用宽行窄株20 cm×90 cm模式,提升育苗经济效益。

We compared five different planting density cutting seedling experiment,and used new poplar variety of‘Huashi 2’for experimental material in Jianghan Plain.The results showed that among five seedling densities,the growth of seedlings with the density of 40 cm×50 cm was the best,followed by 20 cm×90 cm.There were no significant differences between density of 40 cm×50 cm and 20 cm×90 cm,no matter one-year old stem with one-year old root or one-year old stem with two-year old root.Combined the seedling quality grade with the cost of seedling,it is recommended that the seedling density of poplar with 20 cm×90 cm,that is the mode wide row and narrow plant in Jianghan Plain,to improve the economic benefits of seedling.