| 氮肥深施及间种白三叶草对茶园N2O排放的影响 |
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| 引用本文： | 吕天新,伍延正,沈健林,陈丹,姜文倩,王娟,李勇,吴金水.氮肥深施及间种白三叶草对茶园N2O排放的影响[J].环境科学,2019,40(9):4221-4229. |
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| 作者姓名： | 吕天新 伍延正 沈健林 陈丹 姜文倩 王娟 李勇 吴金水 |
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| 作者单位： | 中国科学院亚热带农业生态研究所,亚热带农业生态过程重点实验室,长沙410125;中国科学院长沙农业环境观测研究站,长沙410125;中国科学院大学,北京100049;中国科学院亚热带农业生态研究所,亚热带农业生态过程重点实验室,长沙410125;中国科学院长沙农业环境观测研究站,长沙410125 |
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| 基金项目： | 国家自然科学基金项目（41671243，41771336，41807044） |
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| 摘 要： | 近年来我国茶园面积不断扩大,茶园施氮(N)量大、N_2O排放量高,是重要的N_2O排放源,开展茶园的N_2O减排研究十分有必要.本研究在位于我国亚热带丘陵区的典型茶园,通过设置常规施肥、氮肥深施和间种白三叶草这3种处理,观测不同施肥及管理措施下茶园土壤N_2O排放及其相关土壤环境因子动态,旨在明确不同措施对茶园N_2O排放的减排效果,并解析相关影响因子.通过3 a的田间试验表明,亚热带丘陵茶园具有较高的N_2O排放,N_2O-N年累积排放量高达5. 1～10. 1 kg·hm-2.N_2O排放主要发生在春夏季,当土壤温度低于15℃,其排放主要与土壤温度呈正相关;当温度高于15℃,则主要与土壤含水量、土壤NH4+-N和NO3--N含量呈正相关.三年间茶园间种白三叶草较常规施肥未显著影响N_2O排放,肥料深施在降雨量较高年份增加了茶园N_2O排放,间种白三叶草和肥料深施未显著影响茶叶产量.本研究表明,亚热带茶园间种白三叶草减排N_2O的效果不显著,不减少氮肥用量下氮肥深施未能降低N_2O排放,今后有必要研究肥料深施配合氮肥减量来减排N_2O.
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| 关 键 词： | 茶园 氧化亚氮(N2O) 温室气体 氮肥 间作 |
| 收稿时间： | 2019/1/30 0:00:00 |
| 修稿时间： | 2019/3/25 0:00:00 |
N2O Emissions from a Tea Field with Deep Application of Nitrogen Fertilizer and Intercropping with White Clover |
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| Institution: | Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;University of Chinese Academy of Sciences, Beijing 100049, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;University of Chinese Academy of Sciences, Beijing 100049, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China,Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China and Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;Changsha Research Station for Agricultural & Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China |
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| Abstract: | |
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| Keywords: | tea field N2O greenhouse gas nitrogen fertilizer intercropping |
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