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
Effects of varying nitrogen and calcium fertilization levels on the growth and physiological traits of the endangered plant Excentrodendron tonkinense seedlings
蚬木（Excentrodendron tonkinense）是国家二级保护植物，同时也是濒危（EN）物种。为了更好地促进蚬木幼苗的培育繁殖，缓解蚬木的濒危状况，该文以两年生蚬木扦插幼苗为试验材料，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，探索氮钙不同配比对蚬木幼苗生长及生理特性的影响，为蚬木的高效栽培与养护提供科学依据。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(Chl a)、叶绿素b(Chl b)、总叶绿素（Chl）和类胡萝卜素（Car）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。综合考虑蚬木幼苗的生长指标、生理指标和隶属函数分析可知，T5（N2Ca2）氮钙协同处理组（即N、Ca 的用量分别为每株16、24g）蚬木幼苗的生长表现最佳，为本试验的最佳施肥组合。
Excentrodendron tonkinense is a national second-class protected plant and also anendangered (EN) species. To facilitate the cultivation and propagation of E. tonkinense seedlingsand 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, thestudy conducted fertilization experiments with varying nitrogen-to-calcium ratios. The aim was toinvestigate the impacts of different nitrogen-to-calcium ratios on the growth and physiologicaltraits of E. tonkinense seedlings, thereby providing a scientific foundation for the efficientcultivation and maintenance of this species. The results were as follows: (1) There were significantdifferences (P<0.05) in the effects of different fertilization treatments on the growth andphysiological characteristics of E. tonkinense seedlings. The T5 (N2Ca2) treatment exhibited thegreatest enhancements in seedling height and ground diameter, suggesting that a fertilizationregimen with medium nitrogen and medium calcium levels may promote the growth andmaturation of E. tonkinense seedlings. (2) The intercellular CO2 concentration (Ci), transpirationrate (Tr), net photosynthetic rate (Pn), stomatal conductance (Gs), chlorophyll a (Chl a),chlorophyll b (Chl b), total chlorophyll (Chl), and carotenoid (Car) contents of seedlings of E.tonkinense in the T5 treatment were all the highest, indicating that the fertilization of calcium inmedium nitrogen is beneficial for promoting the transport and accumulation of photosyntheticproducts in E. tonkinense seedlings and enhancing their photosynthesis. (3) The soluble sugar (SS),soluble protein (SP) content, and SOD activity of E. tonkinense seedlings in the T5 treatment werethe highest, while the free proline (Pro) and malondialdehyde (MDA) content of E. tonkinenseseedlings in the T8 treatment were the lowest. Through a comprehensive analysis of growthmetrics, physiological indicators and subordination function, it can be inferred that the T5 (N2Ca2)nitrogen calcium synergistic treatment (with N and Ca dosages of 16 gplant-1 and 24 gplant-1,respectively) shows the best growth performance of E. tonkinense seedlings, making it the optimalfertilization combination for this study.
b黄星月、梁芳、梁喜献、b谭长强、梁诗瑶
10.11931/guihaia.gxzw202404010
植物学农艺学农业科学研究
蚬木濒危植物生长特性生理特性氮钙施肥
Excentrodendron tonkinenseendangered plantsgrowth characteristicsphysiological characteristicsnitrogen and calcium fertilization
b黄星月,梁芳,梁喜献,b谭长强,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[EB/OL].(2024-08-08)[2025-08-16].https://chinaxiv.org/abs/202408.00071.点此复制
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