AN Yu,HAN Xinsheng,GUO Yongzhong,et al.Response of Stoichiometric Characteristics and Nutrient Resorption of Glycyrrhiza uralensis Leaves to Nitrogen Addition[J].Northern Horticulture,2025,(13):65-72.[doi:10.11937/bfyy.20243790]
甘草叶片化学计量特征及养分重吸收对氮添加的响应
- Title:
- Response of Stoichiometric Characteristics and Nutrient Resorption of Glycyrrhiza uralensis Leaves to Nitrogen Addition
- 文章编号:
- 1001-0009(2025)13-0065-08
- 分类号:
- S 567.23
- 文献标志码:
- A
- 摘要:
- 以一年生乌拉尔甘草（Glycyrrhiza uralensis Fisch.）为试材，采用野外调查和室内分析相结合的方法，研究了甘草成熟叶和衰老叶片化学计量特征及养分重吸收效率对氮添加的响应规律，以期为栽培甘草养分管理提供参考依据。结果表明：不同施氮处理下甘草成熟叶和衰老叶C含量存在显著差异（P<0.05），N、P含量无显著性差异，成熟叶C、N含量和衰老叶C、N、P含量均随着施氮量的增加呈先升高后降低的趋势。成熟叶和衰老叶C∶N、C∶P、N∶P对氮添加存在不同响应，不同施氮处理下成熟叶C∶N无显著性差异，C∶P、N∶P存在显著性差异（P<0.05）；衰老叶C∶N、C∶P、N∶P均无显著性差异（P>0.05）。甘草叶片氮重吸收效率（NRE）和磷重吸收效率（PRE）均随着施氮量的增加呈先降低后升高的趋势，NRE无显著性差异，PRE存在显著性差异。相关分析表明，甘草叶片NRE与衰老叶N含量、成熟叶C∶N呈显著负相关（P<0.05），与衰老叶C∶N呈显著正相关；PRE与成熟叶P含量呈显著正相关，与衰老叶N、P含量、成熟叶C∶P呈显著负相关。甘草叶片的相对重吸收效率与成熟叶N∶P呈显著正相关，N∶P为14.27时NRE等于PRE。综上所述，氮添加降低了甘草叶片NRE和PRE，且PRE整体上高于NRE，表明甘草通过提高PRE来降低对土壤中P元素的需求，甘草生长总体上受P元素的限制。
- Abstract:
- Taking one-year-old Glycyrrhiza uralensis Fisch.as the test materials，the response of C，N and P stoichiometric characteristics and nutrient reabsorption efficiency in mature and senesced leaves of licorice to nitrogen addition was studied by field investigation and laboratory analysis，in order to provide reference for nutrient management of cultivated licorice.The results showed that there was a significant difference in C content in mature and senesced leaves of licorice under different nitrogen application treatments (P<0.05)，but there was no significant difference in N and P content.The C and N content of mature leaves and the C，N and P content of senesced leaves increased first and then decreased with the increase of nitrogen addition.There were different responses of C∶N，C∶P and N∶P in mature leaves and senesced leaves to nitrogen addition.There was no significant difference in C∶N in mature leaves under different nitrogen application treatments，but there were significant differences in C∶P and N∶P (P<0.05).There were no significant difference in C∶N，C∶P and N∶P in senesced leaves (P>0.05).The nitrogen reabsorption efficiency (NRE) and phosphorus reabsorption efficiency (PRE) of licorice leaves decreased first and then increased with the increase of nitrogen addition.There was no significant difference in NRE，but had a significant difference in PRE.Correlation analysis showed that NRE of leaves was significantly negatively correlated with N content in senesced leaves and C∶N in mature leaves (P<0.05)，and significantly positively correlated with C∶N in senesced leaves.PRE of leaves was significantly positively correlated with P content in mature leaves，and significantly negatively correlated with N and P content in senesced leaves and C∶P in mature leaves.The relative reabsorption rate of licorice leaves was significantly positively correlated with N∶P in mature leaves，and NRE was equal to PRE when N∶P was 14.27.In conclusion，nitrogen addition reduced the NRE and PRE of licorice leaves，and the PRE was generally higher than the NRE.It showed that licorice reduced the demand for P in the soil by increasing the PRE，and its growth was generally limited by P element.
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备注/Memo
第一作者简介：安钰(1982-)，女，博士，副研究员，现主要从事植物生理生态等研究工作。E-mail：anyu-02@163.com.基金项目：宁夏自然科学基金资助项目（2023AAC03402）；宁夏留学回国人员创新创业资助项目（2023）。收稿日期：2024-09-23