摘要
特大雨雪冰冻低温气候给贵州小桐子1～3年生幼林和苗木造成了很大灾害。调查显示：海拔600m以上的幼林和苗木受害率达100％，海拔725m以上全部冻死；阳坡和半阳坡的小桐子危害程度比阴坡和半阴坡低，同一坡向的中下部受害程度明显低于中上部，迎风面受害程度最为严重；受害严重的苗木顶梢损害10～15cm，较轻的苗木顶梢损害0．8～4．5cm；野生或半野生小桐子未造成灾害。重点针对Ⅲ级和Ⅱ级受害幼林开展贵州小桐子油料能源林的灾后重建，Ⅲ级受害幼林应重造，Ⅱ级受害幼林应开展修枝整形、喷施消毒灭菌、补植等抚育管理。
Due to the low temperature of the extreme freezing rain and snow weather, the young forests （ aged 1 to 3 years） and the that the injury seedlings of the physic nut were seriously ratio for the young forest and the seedlings forests and the seedling above the altitude of 725 m died. damaged by the disaster. It was showed by investigation at the altitude of 〉 600 m was 100%, and all the young The damage degree of the physics nut on the sunny and semi-sunny slopes was lower than that on shady and semi-shady slopes, and that on the lower and middle parts of the slopes was lower than that on the upper and middle parts of the slopes in the same slope aspect, and the injury degree of the physic nut on the windward was the highest. The average terminal death length of the seedlings in heavy damaged area was 10 to 15 cm,and that on slight damaged area was 0.8 to 4.5 cm. No significant damage was observed for the wild and the semi-wild physic nuts. The reestablishment of the oil-bearing energy forest of the physic nut should be focused on the young forests with injury grade Ⅱ and Ⅲ. For the young forests in grade Ⅲ, it is needed to reforest, and for the young forests in grade Ⅱ , it should be managed by artificial pruning, disinfecting, and reinforcement planting, etc.
出处
《林业科学研究》
CSCD
北大核心
2008年第4期506-509,共4页
Forest Research
基金
国家林业局科技推广项目"麻疯树良种与优质丰产栽培配套技术示范推广"([2007]129号)资助
关键词
小桐子
特大雨雪冰冻
低温
幼林
苗木
灾害
physic nut （ Jatropha curcas）
extreme freezing rain and snow
low temperature
young growth
seedling
disaster
