不同凋落物对油松幼苗生长的影响

Effects of Different litters on the Growth of Pinus tabuliformis Seedlings

为考察凋落物覆盖方式对油松幼苗生长状况的影响,文章以甘肃会宁县某林场为试验区,分别考察了4个处理,即处理1:不添加覆盖物;处理2:阔叶凋落物∶针叶凋落物=3∶7;处理3:阔叶凋落物∶针叶凋落物=1∶1;处理4:阔叶凋落物∶针叶凋落物=7∶3对当地油松幼苗生长状况的影响。结果显示:不同的凋落物覆盖方式对油松幼苗各方面生长情况具有不同程度的影响,发现不同覆盖物的添加均对油松幼苗高度有促进作用,阔叶凋落物∶针叶凋落物=7∶3的处理方式对油松幼苗基径生长促进作用效果最为明显,较空白对照高0.30 mm;对油松幼苗根生物量促进效果最为明显,相较于空白对照高出0.20 g;对油松幼苗叶生物量具有抑制作用,相较于空白对照低0.10 g;对油松幼苗根冠比增强效果最为明显,相较于空白对照高出22.88%。

In order to investigate the effect of litter mulching on the growth of Pinus tabuliformis seedlings,this paper took a forest farm in Huining County as an experimental area,and investigated four treatments,namely Treatment 1:no mulching;Treatment 2:broad-leaved litter:coniferous litter=3:7;Treatment 3:broad-leaved litter:coniferous litter=1:1;Treatment 4:broadleaved litter:coniferous litter=7:3 impact on the growth of local Pinus tabuliformis seedlings.The results showed that different litter mulching methods had different effects on the growth of Pinus tabuliformis seedlings in various aspects,and it was found that the addition of different mulch had a promoting effect on the height of Pinus tabuliformis seedlings.Broad-leaved litter:coniferous litter=7:3 has the most obvious effect on the growth of basal diameter of Pinus tabuliformis seedlings,0.30 mm higher than the blank control.The root biomass of Pinus tabuliformis seedlings was most significantly promoted,0.20g higher than that of the blank control.It has an inhibitory effect on the leaf biomass of Pinus tabuliformis seedlings,0.10 g lower than that of the blank control.The root-shoot ratio of Pinus tabuliformis seedlings was the most obvious,22.88%higher than that of the blank control.