油茶采伐迹地连栽对幼树生长的影响

The impact of Camellia oleifera seccessive rotation on the sapling growth

为探究油茶采伐迹地连栽对幼树生长的影响,本研究以长林系列油茶新品种为试验材料,对比分析在油茶采伐迹地、杉木采伐迹地和茶叶采伐迹地3种地类上种植油茶幼树的造林成活率和种植后1 a、2 a的幼树新梢指标,开展不同地类的对比试验。结果表明:油茶采伐迹地连栽的造林成活率达89.22%,比最差的茶叶采伐迹地87.78%多了1.44%,但3种地类间的造林成活率均未达到显著差异。油茶采伐迹地连栽的幼树新梢生长量最低为18.10cm,比其他2种地类中的平均新梢生长量少30.26%。由此可见,油茶采伐迹地连栽对造林成活率没有直接影响,但对幼树的新梢生长有一定的抑制作用。

In order to explore the impact of Camellia oleifera seccessive rotation on the sapling growth,the research take Changlin series C.oleifera new varieties as test materials,and compared the survival rate and shoot growth index of C.oleifera saplings planted on C.oleifera cutover land,Cunninghamia lanceolata cutover land,and C.sinensis cutover land.The results showed that,the afforestation survival rate of C.oleifera saplings planted on C.oleifera cutover land was 89.22%,which was 1.44%higher than planted on C.sinensis cutover land,but there was no significant difference between the three kinds of cutover lands.The shoot growth index of C.oleifera saplings planted on C.oleifera cutover land was 18.10 cm,which was 30.26%lower than that planted on the other two cutover lands.It follows that,seccessive rotation has no direct influence on C.oleifera saplings’survival rate,but reduced the shoot growth index compared with the other two cutover lands.