宜昌丘陵岗地杨树品系早期选择研究

Study on Poplar Clones Early Selection in Low-hilly Land of Yichang City

通过对20个杨树品系扦插造林和带根造林树高、胸径、材积、保存率的比较试验,初步筛选出优良速生杨树品系,为宜昌丘陵岗地发展杨树工业原料林提供科学依据。结果表明:扦插造林的保存率为64.9%,南林895杨5a生长量比20个品系平均提高树高27.3,胸径28.1,材积66.7;带根造林的保存率为67.5%,鄂育杨5年生长量比20个品系平均提高树高15.9,胸径23.2,材积37.1,可开展进一步的观察试验和栽培利用。

The superior and fast-growing poplar clones were preliminary screened out by the comparative test on height,DBH,volume,preserving rate of 20 poplar clones through cuttage forestation and root afforestation,providing scientific basis for developing poplar industrial raw material forest in low-hilly land of Yichang City.The results showed that preserving rate of cuttage afforestation were 64.9%,the five years growth of Nanlin-895 clone increased 27.3%,28.1%,66.7%,66.7% more than the average height,DBH,volume,preserving rate of root afforestation of 20 clones,and the five years growth of Eyu clone increased 15.9%,23.2%,37.1%,more than the average height,DBH,volume of 20 clones.The Eyu clone showed potential for further observational studies and cultivation.