养分添加对中国草地植物叶片养分重吸收率的影响  

Effects of Nutrient Addition on Leaf Nutrient Resorption Efficiency in Grassland Species across China

作　　者：黎鹏宇 何奕成 纪宝明[2] 田大栓 LI Peng-yu;HE Yi-cheng;JI Bao-ming;TIAN Da-shuan(Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;School of Grassland Science,Beijing Forestry University,Beijing 100083,China;College of Grassland Science and Technology,China Agricultural University,Beijing 100193,China)

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]北京林业大学草业与草原学院,北京100083 [3]中国农业大学草业科学与技术学院,北京100193

出　　处：《草地学报》2024年第11期3335-3343,共9页Acta Agrestia Sinica

基　　金：国家自然科学基金面上项目(32271636);自然科学基金委员会优秀青年科学基金项目(32322055);中科院青促会人才支持项目(2021050)资助。

摘　　要：探究叶片养分重吸收率对土壤氮、磷养分及其交互作用响应的空间格局及控制因素对理解植物养分利用策略至关重要。本文以中国草地植物为研究对象,并全面搜集和整合分析已有的叶片养分重吸收率与氮磷添加控制实验方面的文献数据。结果显示,氮磷添加显著促进绿叶和凋落叶养分含量(26.52%~54.99%),但是降低了叶片氮重吸收率(-11.37%)。此外,我们发现氮添加提升了禾草和杂类草叶片的氮磷重吸收率。尽管氮添加促进非豆科植物的氮磷重吸收率,但不影响豆科植物。磷添加促进了豆科植物的氮磷重吸收率,同时也提升了非豆科植物的氮重吸收率。进一步,我们发现叶片养分重吸收率的响应格局主要受养分添加水平、实验时间、气候条件和土壤养分共同调控。总之,这些新的发现有助于深化理解草地植物养分内循环过程机制以及高效养分利用策略。Understanding the spatial patterns and controlling factors of leaf nutrient resorption efficiency in response to soil nitrogen(N),phosphorus(P),and their interactions is crucial for deciphering plant nutrient use strategies.In this study,we focused on grassland plants in China and conducted a comprehensive meta-analysis of experimental data from nutrient addition studies.Our findings revealed that combined N and P addition significantly increased nutrient content in both green and litter(26.52%-54.99%)compared to control,but reduced nitrogen resorption efficiency by 11.37%.Moreover,N addition enhanced both N and P resorption efficiency in grasses and forbs,although this effect was absent in leguminous plants.Interestingly,P addition boosted nutrient resorption efficiency in legumes while also increasing nitrogen resorption efficiency in non-leguminous species.Further analysis showed that the spatial patterns of nutrient resorption efficiency is governed by nutrient addition levels,experiment duration,climate conditions,and soil nutrient levels.These insights advance our understanding of nutrient cycling processes and the adaptive nutrient-use strategies of grassland plants.

关 键 词：养分重吸收率 养分添加 中国草地 整合分析 

分 类 号：S812[农业科学—草业科学]