| 引用本文: | 梁喜献, 梁 芳, 谭长强, 黄星月, 梁诗瑶.氮钙不同配比施肥对濒危植物蚬木幼苗生长及生理特性的影响[J].广西植物,2025,45(1):121-132.[点击复制] |
| LIANG Xixian, LIANG Fang, TAN Zhangqiang, HUANG Xingyue, LIANG Shiyao.Effects of fertilization with different nitrogen-to-calcium ratios on growth and physiological traits of endangered plant Excentrodendron tonkinense seedlings[J].Guihaia,2025,45(1):121-132.[点击复制] |
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| 氮钙不同配比施肥对濒危植物蚬木幼苗生长及生理特性的影响 |
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梁喜献1,2, 梁 芳3, 谭长强2*, 黄星月1, 梁诗瑶4
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1. 广西农业职业技术大学 城乡建设学院, 南宁 530004;2. 广西壮族自治区林业科学研究院、 中南速生材繁育国家林业和草原局
重点实验室, 南宁 530002;3. 玉林师范学院 智慧农业学院, 广西 玉林 537000;4. 南宁市林长制事务中心, 南宁 530023
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| 摘要: |
| 蚬木(Excentrodendron tonkinense)是国家二级保护植物,也是濒危(EN)物种。为更好地促进蚬木幼苗的培育繁殖和缓解蚬木的濒危状况,该研究以2年生蚬木扦插幼苗为研究材料,采用双因素的试验设计方法,通过对其进行氮钙不同配比施肥试验,探讨氮钙不同配比对蚬木幼苗生长及生理特性的影响。结果表明:(1)不同施肥处理对蚬木幼苗生长及生理特性的影响存在显著性差异(P<0.05),T5(N2Ca2)处理组蚬木幼苗的苗高和地径增量最高,表明中氮中钙的施肥处理有利于促进蚬木幼苗的生长发育。(2)T5处理组蚬木幼苗的胞间CO2浓度(Ci)、蒸腾速率(Tr)、净光合速率(Pn)、气孔导度(Gs)、叶绿素a(Chla)、叶绿素b(Chlb)、总叶绿素(Chl)和类胡萝卜素(Car)的含量均处于最高值,表明中氮中钙的施肥处理有利于促进蚬木幼苗光合产物的运转和积累,并增强植株的光合作用。(3)T5处理组蚬木幼苗的可溶性糖(SS)、可溶性蛋白(SP)含量及SOD活性均处于最高位置,T8处理组蚬木幼苗的游离脯氨酸(Pro)、丙二醛(MDA)含量最低。综合分析蚬木幼苗的生长指标、生理指标和隶属函数的结果,发现T5(N2Ca2)氮钙协同处理组(即N、Ca的用量分别为每株16 g、24 g)蚬木幼苗的生长表现最佳,为最佳施肥组合。该研究结果为蚬木的高效栽培与养护提供了科学依据 |
| 关键词: 蚬木, 濒危植物, 生长特性, 生理特性, 氮钙施肥 |
| DOI：10.11931/guihaia.gxzw202404010 |
| 分类号:Q945 |
| 文章编号:1000-3142(2025)01-0121-12 |
| 基金项目:国家自然科学基金(32160359); 中央财政林草科技推广示范项目( [2023]TG31号); 广西高校中青年教师科研基础能力提升项目(2024KY1244); 广西农业职业技术大学重点科研项目(XKJ2421)。 |
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| Effects of fertilization with different nitrogen-to-calcium ratios on growth and physiological traits of endangered plant Excentrodendron tonkinense seedlings |
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LIANG Xixian1,2, LIANG Fang3, TAN Zhangqiang2*, HUANG Xingyue1, LIANG Shiyao4
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1. Urban-Rural Construction College, Guangxi Vocational University of Agriculture, Nanning 530004, China;2. Key Laboratory of National
Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Guangxi Forestry Research Institute,
Nanning 530002, China;3. College of Smart Agriculture, Yulin Normal University, Yulin 537000, Guangxi,
China;4. Nanning Forest System Affairs Center, Nanning 530023, China
1. Urban-Rural Construction College, Guangxi Vocational University of Agriculture, Nanning 530004, China; 2. Key Laboratory of National
Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Guangxi Forestry Research Institute,
Nanning 530002, China; 3. College of Smart Agriculture, Yulin Normal University, Yulin 537000, Guangxi,
China; 4. Nanning Forest System Affairs Center, Nanning 530023, China
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| Abstract: |
| Excentrodendron tonkinense is a national second-class protected plant and also an endangered(EN)species. To facilitate the cultivation and propagation of E. tonkinense seedlings and mitigate the species' endangered status, this study utilized two-year-old E. tonkinense cutting seedlings as experimental subjects. Employing a two-factor experimental design approach, the study conducted fertilization experiments with different nitrogen-to-calcium ratios. The aim was to investigate the impacts of different nitrogen-to-calcium ratios on the growth and physiological traits of E. tonkinense seedlings species. The results were as follows:(1)There were significant differences(P<0.05)in the effects of different fertilization treatments on the growth and physiological characteristics of E. tonkinense seedlings. T5(N2Ca2)treatment exhibited the greatest enhancements in seedling height and ground diameter, suggesting that a fertilization regimen with medium nitrogen and medium calcium levels can promote the growth and development of E. tonkinense seedlings.(2)The intercellular CO2 concentration(Ci), transpiration rate(Tr), net photosynthetic rate(Pn), stomatal conductance(Gs), chlorophyll a(Chla), chlorophyll b(Chlb), total chlorophyll(Chl), and carotenoid(Car)contents of seedlings of E. tonkinense in T5 treatment were all the highest, indicating that the fertilization of calcium in medium nitrogen is beneficial for promoting the transport and accumulation of photosynthetic products in E. tonkinense seedlings and enhancing their photosynthesis.(3)The soluble sugar(SS), soluble protein(SP)contents, and superoxide dismutase(SOD)activity of E. tonkinense seedlings in T5 treatment were the highest, while the free proline(Pro)and malondialdehyde(MDA)contents of E. tonkinense seedlings in T8 treatment were the lowest. Through a comprehensive analysis of growth metrics, physiological indicators and subordination function, it can be inferred that T5(N2Ca2)nitrogen and calcium synergistic treatment(with N and Ca dosages of 16 g·plant-1 and 24 g·plant-1, respectively)shows the best growth performance of E. tonkinense seedlings, making it the optimal fertilization combination for this study. This study provides a scientific foundation for the efficient cultivation and maintenance of E. tonkinense. |
| Key words: Excentrodendron tonkinense, endangered plants, growth characteristics, physiological characteristics, nitrogen and calcium fertilization |
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