丘陵冈地泡桐栽培经营技术研究

Study on Cultivation and Management Techniques for Paulownia fortunei in Hillock Areas

本文以泡桐9501为试验材料,通过在相同的立地条件下,不同造林密度以及泡桐在生长初期进行修枝、平茬、接干、施肥等技术措施,研究对单位面积产量的影响。结果表明,丘陵冈地发展泡桐,造林初始密度建议为3 m×3m,即74株/667m^2。5年后蓄积量可达6.408 m3/667m^2。后期结合间伐,使密度变为3 m×6 m。在泡桐生长初期进行修枝、平茬、接干、施肥等技术措施,单位面积产量与对照分别可提高23%、40%、36%、130%~350%。不同处理措施对泡桐粗生长、高生长及单株材积的影响均显著差异(p=0.000 1)。经多重比较,施肥对胸径、树高、材积方面的影响最大,与其他措施之间的胸径、树高、材积方面均呈极显著差异水平。

In this paper, cultivar 9501 of Paulownia fortunei was used as the test material to study the effects of different planting densities and technical measures at the early growth stage on the per -uni t-area yield in the same site conditions including pruning, stumping, trunk grafting, and fertilizing. The results showed that the 5-year volume could reach 6.408 m3/667m2 with the initial density of 3 m ×3 m, namely 74 / 667m^2 and later-stage density of 3 m×6 m by tending felling. The per-uni t-area yield of Paulownia fortunei cultivated with such technical measures as pruning, stumping, trunk grafting and fertilizing at the early growth stage increased by 23%, 40%, 36%, 130% -350% respectively compared with that of the control group. The differences of the radial growth, height growth and single-tree volume were all significant when Paulownia fortunei plantations were tended with different treatment measures （p=0.000 1）. Through multiple comparisons, fertilizing had the greatest effects on the DBH growth, height growth and single-tree volume, significantly different from those by other technical measures.