【摘要】 为研究土壤有效磷含量对植物理化性质、燃烧性的影响,以采自滇中地区澄江、安宁、盘龙等5个县(市、区)的16个主要森林木本植物枝叶为研究对象,测定土壤有效磷含量以及植物枝、叶的抽提物含量、灰分含量、热值,分析枝叶理化性质与土壤有效磷含量的相关性,并在此基础上分析了土壤有效磷含量对植物燃烧性的影响。结果显示:(1)灌木和针叶树种叶对土壤有效磷含量的响应要比枝敏感,而阔叶树种枝、叶对土壤有效磷含量的敏感程度相近。(2)针叶、阔叶和灌木的枝抽提物含量、热值与土壤有效磷含量均呈正相关,灰分含量与土壤有效磷含量均呈负相关,且灌木枝的抽提物含量、热值与土壤有效磷含量的相关性显著,这表明土壤有效磷含量的增加能够增强木本植物枝燃烧性。(3)针叶、阔叶和灌木的叶抽提物含量与土壤有效磷含量均呈正相关;灌木叶的灰分含量与土壤有效磷含量呈正相关,针叶植物和阔叶乔木叶的灰分含量与土壤有效磷含量呈负相关;阔叶乔木叶的热值与土壤有效磷含量呈负相关,而灌木与针叶木本植物叶的热值与土壤有效磷含量呈正相关。这表明土壤有效磷含量能在一定程度上增强针叶植物的燃烧性。(4)将3类植物综合分析时,枝叶的抽提物含量、热值与土壤有效磷含量呈正相关,灰分含量与土壤有效磷含量呈负相关,植物燃烧性增强。在此基础上提出了相应的可燃物管理措施。更多还原

【Abstract】 In order to study the effect of soil available phosphorus content on the physicochemical property and combustibility of plants in central Yunnan, the branches and leaves of 16 main forest woody species, which came from 5 counties(cities, ditricts)including Chengjiang, Anning and Panlong were studied.The soil available phosphorus content, and the extract content, ash content and calorific value of branches and leaves were determined.The correlation between the physicochemical property of branches and leaves and the soil available phosphorus content was analyzed, and on this basis, the influence of soil available phosphorus content on plant combustibility was analyzed.results showed that :(1)The physicochemical properties of the leaves of shrubs and conifers are more sensitive to the soil available phosphorus content than branches, while the branches and leaves of broad-leaved plants are similar in sensitivity to the soil available phosphorus content.(2)The extract content and calorific value of coniferous, broad-leaved and shrub branch are positively correlated with the soil available phosphorus content, and the ash content and soil available phosphorus content are negatively correlated, and there is a significant correlation between the extract content and calorific value of shrub branches and the soil available phosphorus content.It’s indicates that the increase of soil available phosphorus content can enhance the combustibility of woody plant branches.(3)The leaf extract content of conifers, broad-leaved and shrubs is positively correlated with the soil available phosphorus content; the ash content of shrub leaves is positively correlated with the soil available phosphorus content, and the ash content of coniferous and broad-leaved plants is negatively correlated with the soil available phosphorus content; the caloric value of broad-leaved plant leaves is negatively correlated with soil available phosphorus content, while the caloric value of shrubs and coniferous leaves is positively correlated with soil available phosphorus content.This indicates that the soil available phosphorus content can enhance the combustibility of coniferous plants to a certain extent.(4)When the 3 types of plants are comprehensively analyzed, the extract content and calorific value of the branches and leaves are positively correlated with the soil available phosphorus content, and the ash content is negatively correlated with the soil available phosphorus content, and the combustibility of plants is enhanced.According to the conclusion of the study, the corresponding combustible management measures are put forward.更多还原