接干和施肥对不同初植苗高泡桐幼树主干生长影响的研究

Effect of Grafting and Fertilizing on the Main Trunk Growth of Young Paulownia Trees from Different Height Seedlings

研究了接干和施肥对苗高为 3.0、3.5、4 .0、4 .5、5.0m初植的 3年生和 4年生泡桐幼树生长的影响。结果表明 ,1次接干能明显促进苗高为 3.0、3.5m苗的 3年生泡桐幼树的高生长 ;2次接干能明显促进苗高为 4 .5m的 4年生泡桐的高生长 ,并且苗高为 4 .0、4 .5、5.0m的 4年生泡桐幼树的高和胸径生长量都明显比 3.0m和 3.5m苗的大 ;施肥能明显促进苗高为 4 .5、5.0m的 1次接干泡桐幼树的高生长。 2次接干处理后 ,对高为 4 .0m的苗培育高干良材 (主干达 6.0m以上 )

This paper dealt with the effect of grafting and fertilizing on main trunk growth of young paulownia trees from seedlings with 3.0,3.5,4.0,4.5,5.0 m in height.The results indicated that first time grafting might promote height growth of 3 year old young trees from seedlings with 3.0 m and 3.5 m in height prominently;second time grafting might promote the height growth of 4 year old trees from seedlings with 4.5 m in height.The increments of height and breast high diameter of those trees from seedlings with 4.0,4.5 and 5.0 m in height were higher than those from seedlings 3.0 and 3.5 m in height.Application of fertilizer could accelerate the growth of seedlings with 4.5 and 5.0 m in height.Seedlings with 4.0 m in height might grow over 6.0 m in main trunk height.