摘要
开展了不同叶篷对橡胶幼树生长的影响研究,结果表明:剪去部分叶篷使得橡胶幼树顶芽抽长提前或延后,导致顶篷叶的叶片物候发生变化,这种变化因剪去叶篷的位置不同或剪去的叶量多少而不同;剪去叶片对橡胶幼树生长有显著的抑制作用,剪去叶片数越多对茎粗、株高生长的抑制作用越大,但未观测到少量剪叶所致的生长补偿作用,剪叶对生长的抑制作用似乎与剪去大量叶片所致的养分损失和减少的光合面积有关;叶篷对植株生长的影响存在位置效应,橡胶幼树茎粗、株高生长的抑制作用因剪去叶篷的位置(含多个叶篷不同位置的组合)而不同。不同位置的叶篷叶片对茎粗、株高生长贡献率大小不同的原因尚有待于深入研究。研究结果对控制植株生长、叶片保护、叶片修剪等有一定指导意义。图2,表3,参20。
After the study of the influence of different leaf-umbrella on the rubber sapling growth, we got some conclusions as fol- lows. 1. Cutting some leaf-umbrellas make the bud growth of the top of rubber sapling is brought earlier or postponed, leading to some changes of leaf phenology of top leaf-umbrella leaves. These changes are different, for the cutting leaf-umbrella position and the area of leaves are different. 2. Cutting the leaves will limit the rubber sapling growth obviously. The more leaves you cut, the more limitation for the growth of stem diameter and sapling height. 3. However, we haven＇ t found any compensatory growth from cutting few leaves. It seems that the growth limitation from cutting leaves is related to the nutrition loss and decrease of photosynthetic area because of the vol- ume of leave cutting. 4. Leaf-umbrella have an influence for the position of the growth of the sapling. The growth limitation for rubber sapling＇ s stem diameter and sapling height is depend on the different cutting position, including many groups with different leaf-um- brella. The exact reason for the degree of the growth limitation on the stem diameter and sapling height from the different cutting leaf- umbrella leaves position is still subject to further study. 5. Above all, these conclusions has some significant instructions on the growth control of the plants, the leaves protection and leaves shaving.
出处
《土壤与作物》
2015年第3期125-130,共6页
Soils and Crops
基金
现代农业产业技术体系建设专项"国家天然橡胶产业技术体系种苗繁育岗位科学家经费"(CARS-34-GW4)
关键词
橡胶树
叶片
剪叶
生长
叶片物候
Hevea brasiliensis
leaf
cutting-leaf
growth
leaf phenology
