梁子湖水生植物常见种能量特征及其环境影响因素
发布时间：2019-05-09 13:18
【摘要】：与水生植物能量相关的性状指标主要有热值、灰分含量、建成消耗及碳氮元素含量等,研究这些性状在不同器官之间,不同物种之间(尤其外来入侵种与本地种之间)的差异以及环境因子对其的影响,有助于理解水生植物能量的分布及资源分配策略,并探讨外来入侵种在能量积累和利用方面是否有特殊优势。然而关于梁子湖水生植物的能量相关研究还比较少见。因此,本文对梁子湖水生植物常见种的能量特征进行了比较分析,并开展了氮添加对喜旱莲子草、水龙和粉绿狐尾藻能量特征的影响及不同水体盐度对穗花狐尾藻和菹能量特征影响的研究,研究结果如下:(1)梁子湖水生植物常见种叶的去灰分热值显著大于茎和根;不同生活型之间叶的去灰分热值无显著差异,有挺水型浮水型沉水型的趋势。建成消耗方面,叶的建成消耗显著大于茎和根;不同生活型之间,叶建成消耗无显著差异,表现出与去灰分热值一致的趋势:挺水型浮水型沉水型。灰分含量表现为根显著大于叶,不同生活型之间,叶灰分含量有沉水型浮水型挺水型趋势,且所研究的水生植物平均叶灰分含量高于陆生植物。碳元素含量方面,叶碳含量显著大于茎和根。沉水型植物除微齿眼子菜叶碳含量较高外,整体碳含量小于其他生活型植物,表现出挺水型浮水型沉水型的规律。叶的氮含量显著高于茎和根。建成消耗与去灰分热值、碳氮元素含量显著正相关,与灰分含量显著负相关。去灰分热值与碳氮元素含量显著正相关,与灰分含量显著负相关。(2)氮添加处理显著提高了喜旱莲子草的单位质量建成消耗,使其显著高于水龙和粉绿狐尾藻氮添加处理下的单位质量建成消耗;空白对照下,喜旱莲子草、水龙和粉绿狐尾藻三种植物的单位质量建成消耗无显著差异。此外,氮添加处理显著提高了喜旱莲子草的叶氮含量和相对生长速率,显著降低了其叶的碳氮比,即喜旱莲子草在不同氮处理下表现出良好的表型可塑性,此外,喜旱莲子草具有较高的建成消耗及光合能力,推测这可能是其成功入侵的一种机制。粉绿狐尾藻的比叶面积、氮含量及光合相关指标在三种植物中皆为最低,但其具有较低的建成消耗。喜旱莲子草和水龙在最大净光合速率和最大电子传输速率方面皆无显著差异。单位质量建成消耗和相对电子传输速率分别与叶氮含量呈正相关,相对电子传输速率与比叶面积呈正相关,单位面积建成消耗与比叶面积呈负相关。(3)在0.15-3.4‰内的不同盐度条件下,菹草和穗花狐尾藻的去灰分热值、灰分含量、建成消耗等能量相关性状皆无显著差异。
[Abstract]:The main traits related to aquatic plant energy are calorific value, ash content, build-up consumption, carbon and nitrogen content, and so on. The differences between different species (especially between invasive species and native species) and the impact of environmental factors on them are helpful to understand the energy distribution and resource allocation strategies of aquatic plants. It also discusses whether alien invasive species have special advantages in energy accumulation and utilization. However, energy-related studies on aquatic plants in Lake Liangzi are rare. Therefore, the energy characteristics of common species of aquatic plants in Liangzi Lake were compared and analyzed in this paper, and the effects of nitrogen addition on drought-tolerant lotus seed grass were carried out. The effects of water body salinity on the energy characteristics of Syracocephalus spp and P. crispus were studied. The results were as follows: (1) the calorific value of ash removal in common species and leaves of aquatic plants in Liangzi Lake was significantly higher than that in stems and roots; There was no significant difference in ash removal calorific value among different life forms, but there was a tendency of straight water floating precipitation. The completed consumption of leaves was significantly higher than that of stems and roots, and there was no significant difference in leaf completion consumption among different life forms, showing the same trend as the calorific value of ash removal: the submerged water type with straight water type and floating water type had the same trend as the calorific value of ash removal. The ash content in the leaves was significantly higher than that in the leaves. Among different life forms, the ash content in the leaves had the tendency of submerged floating water type and the average ash content in the leaves of the aquatic plants studied was higher than that of the terrestrial plants, and the average ash content in the leaves of the aquatic plants was higher than that of the terrestrial plants. In terms of carbon content, the carbon content in leaves was significantly higher than that in stems and roots. Except for the higher carbon content in the leaves of cotyledons, the whole carbon content of submerged plants is lower than that of other life-forms plants, which shows the law of floating-water submergence type of straight-water type. The nitrogen content in leaves was significantly higher than that in stems and roots. The built-up consumption was positively correlated with ash removal calorific value and carbon and nitrogen content, and negatively correlated with ash content. The calorific value of ash removal was significantly positively correlated with the content of carbon and nitrogen, and negatively correlated with the content of ash. (2) nitrogen treatment significantly increased the unit mass consumption of lotus seed grass. It was significantly higher than the unit mass completion consumption under the nitrogen addition treatment of Shuilong and Pink-green fox tail algae. Under the blank control, there was no significant difference in the unit mass consumption of three species of plants, namely, lotus seed grass, water dragon and Cyxocephalus fargesii. In addition, the nitrogen addition significantly increased the leaf nitrogen content and relative growth rate of lotus seed grass, and decreased the carbon to nitrogen ratio of its leaves, that is to say, it showed good phenotypic plasticity under different nitrogen treatments, in addition, the leaf nitrogen content and relative growth rate of A. antherifera were significantly increased, and the leaf carbon to nitrogen ratio was significantly decreased under different nitrogen treatments. Lotus seed grass has high completion consumption and photosynthetic capacity, which may be a mechanism of successful invasion. The specific leaf area, nitrogen content and photosynthetic related indexes of Cyxocephalus verticillata were the lowest among the three plants, but they had lower complete consumption. There was no significant difference in the maximum net photosynthetic rate and the maximum electron transport rate between the lotus seed and the water dragon. The consumption per unit mass and the relative electron transport rate were positively correlated with the leaf nitrogen content, and the relative electron transport rate with the specific leaf area, respectively. (3) the calorific value of ash and ash content of Potamogeton crispus and Pterocephalus spp in different salinity range from 0.15 鈥，
本文编号：2472799
[Abstract]:The main traits related to aquatic plant energy are calorific value, ash content, build-up consumption, carbon and nitrogen content, and so on. The differences between different species (especially between invasive species and native species) and the impact of environmental factors on them are helpful to understand the energy distribution and resource allocation strategies of aquatic plants. It also discusses whether alien invasive species have special advantages in energy accumulation and utilization. However, energy-related studies on aquatic plants in Lake Liangzi are rare. Therefore, the energy characteristics of common species of aquatic plants in Liangzi Lake were compared and analyzed in this paper, and the effects of nitrogen addition on drought-tolerant lotus seed grass were carried out. The effects of water body salinity on the energy characteristics of Syracocephalus spp and P. crispus were studied. The results were as follows: (1) the calorific value of ash removal in common species and leaves of aquatic plants in Liangzi Lake was significantly higher than that in stems and roots; There was no significant difference in ash removal calorific value among different life forms, but there was a tendency of straight water floating precipitation. The completed consumption of leaves was significantly higher than that of stems and roots, and there was no significant difference in leaf completion consumption among different life forms, showing the same trend as the calorific value of ash removal: the submerged water type with straight water type and floating water type had the same trend as the calorific value of ash removal. The ash content in the leaves was significantly higher than that in the leaves. Among different life forms, the ash content in the leaves had the tendency of submerged floating water type and the average ash content in the leaves of the aquatic plants studied was higher than that of the terrestrial plants, and the average ash content in the leaves of the aquatic plants was higher than that of the terrestrial plants. In terms of carbon content, the carbon content in leaves was significantly higher than that in stems and roots. Except for the higher carbon content in the leaves of cotyledons, the whole carbon content of submerged plants is lower than that of other life-forms plants, which shows the law of floating-water submergence type of straight-water type. The nitrogen content in leaves was significantly higher than that in stems and roots. The built-up consumption was positively correlated with ash removal calorific value and carbon and nitrogen content, and negatively correlated with ash content. The calorific value of ash removal was significantly positively correlated with the content of carbon and nitrogen, and negatively correlated with the content of ash. (2) nitrogen treatment significantly increased the unit mass consumption of lotus seed grass. It was significantly higher than the unit mass completion consumption under the nitrogen addition treatment of Shuilong and Pink-green fox tail algae. Under the blank control, there was no significant difference in the unit mass consumption of three species of plants, namely, lotus seed grass, water dragon and Cyxocephalus fargesii. In addition, the nitrogen addition significantly increased the leaf nitrogen content and relative growth rate of lotus seed grass, and decreased the carbon to nitrogen ratio of its leaves, that is to say, it showed good phenotypic plasticity under different nitrogen treatments, in addition, the leaf nitrogen content and relative growth rate of A. antherifera were significantly increased, and the leaf carbon to nitrogen ratio was significantly decreased under different nitrogen treatments. Lotus seed grass has high completion consumption and photosynthetic capacity, which may be a mechanism of successful invasion. The specific leaf area, nitrogen content and photosynthetic related indexes of Cyxocephalus verticillata were the lowest among the three plants, but they had lower complete consumption. There was no significant difference in the maximum net photosynthetic rate and the maximum electron transport rate between the lotus seed and the water dragon. The consumption per unit mass and the relative electron transport rate were positively correlated with the leaf nitrogen content, and the relative electron transport rate with the specific leaf area, respectively. (3) the calorific value of ash and ash content of Potamogeton crispus and Pterocephalus spp in different salinity range from 0.15 鈥，
本文编号：2472799
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