红壤稻田不同肥力水平和施氮量对早晚季甲烷排放的互作效应

doi:10.3969/j.issn.1006-8082.2023.06.012

中国稻米 ›› 2023, Vol. 29 ›› Issue (6): 61-66.DOI: 10.3969/j.issn.1006-8082.2023.06.012

红壤稻田不同肥力水平和施氮量对早晚季甲烷排放的互作效应

贾震¹(), 付文涛¹, 王海媛¹, 陈金²^,³, 曾勇军¹, 黄山¹^,^*()

¹江西农业大学作物生理生态与遗传育种教育部重点实验室，南昌 330045
²江西省农业科学院土壤肥料与资源环境研究所，南昌 330200
³井冈山红壤研究所/江西省农业科学院井冈山分院，江西吉安 343016

收稿日期:2023-07-17 出版日期:2023-11-20 发布日期:2023-11-21
通讯作者: *ecohs@126.com
作者简介:
第一作者：380604391@qq.com
基金资助:
国家自然科学基金(31960397);国家自然科学基金(32060431);江西省水稻产业技术体系专项(JXARS-02-03);中青年科技创新领军人才专项(赣科计字[2018]175号)

Interactive Effects of Different Fertility Levels and Nitrogen Application Rates on Methane Emissions in Early and Late Season of Red Soil Rice Fields

JIA Zhen¹(), FU Wentao¹, WANG Haiyuan¹, CHEN Jin²^,³, ZENG Yongjun¹, HUANG Shan¹^,^*()

¹Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang 330045, China
²Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Science, Nanchang 330200, China
³Jinggangshan Institute of Red Soil/Jinggangshan Branch of Jiangxi Academy of Agricultural Sciences, Ji’an, Jiangxi 343016, China

Received:2023-07-17 Online:2023-11-20 Published:2023-11-21
Contact: *ecohs@126.com
About author:
1st author: 380604391@qq.com

摘要/Abstract

摘要：

土壤肥力和施氮量是影响稻田甲烷（CH₄）排放的重要因子，但二者的互作效应尚不明晰。明确不同土壤肥力下施氮量对稻田CH₄排放的影响，对提高稻田CH₄排放清单的准确性和改进稻田CH₄排放模型具有重要意义。以土壤有机质含量为标准，选择3个不同土壤肥力梯度（低、中、高）的红壤性双季稻田，设置4个施氮水平（N₀、N₉₀、N₁₅₀和 N₂₁₀分别代表纯氮施用量为 0、90、150和210 kg/hm²），研究了土壤肥力和施氮量对稻田CH₄排放的互作效应。结果表明，在早稻季，与低肥力稻田相比，中、高肥力稻田CH₄排放量分别显著减少115.7% 和32.4%；与N₀处理相比，N₉₀处理的CH₄排放量显著增加36.0%，而N₁₅₀和N₂₁₀处理分别显著减少32.9%和55.0%。在晚稻季，与低肥力稻田相比，中肥力稻田CH₄排放量显著增加40.0%，而高肥力稻田CH₄排放量有增加趋势，但两者差异不显著；与N₀处理相比，N₉₀处理CH₄排放量显著增加46.4%，而N₁₅₀、N₂₁₀处理无显著差异。从周年CH₄排放量来看，低肥力条件下，N₉₀处理比N₀处理显著增加82.8%，N₁₅₀和N₂₁₀处理与N0处理相比无显著差异；中、高肥力条件下，各施氮量处理间CH₄排放无显著差异。土壤肥力和施氮量对早稻季和周年CH₄排放量有显著的互作效应，但对晚稻季CH₄排放量无显著互作效应。

关键词: 土壤, 肥力, 施氮量, 双季稻, CH₄排放

Abstract:

Soil fertility and nitrogen (N) rates are important factors affecting methane (CH₄) emissions from rice fields, but the interactive effects between them is not clear. It is of great significance to clarify the effects of nitrogen application rates on CH₄ emissions in paddy fields under different soil fertility to improve the accuracy of CH₄ emission inventory and CH₄ emission model in paddy fields. Based on the content of soil organic matter, three soil organic matter gradients (low, medium, and high) were selected, and four nitrogen application rates(0, 90, 150 and 210 kg/hm²) were set to study the interaction effects of soil fertility and nitrogen application rates on CH₄ emissions from red soil rice fields. The results showed that, in the early rice season, compared with the low fertility paddy field, the CH₄ emissions from the middle and high fertility paddy fields were significantly reduced by 115.7% and 32.4%, respectively; compared with N₀ treatment, the CH₄ emission in N₉₀ treatment significantly increased by 36.0%, while in N₁₅₀ and N₂₁₀ treatment significantly decreased by 32.9% and 55.0%, respectively. In the late rice season, compared with the low fertility paddy field, the CH₄ emission in the medium fertility paddy field increased by 40.0%, while in the high fertility paddy field had an increasing trend, but the difference was not significant; the CH₄ emission of N₉₀ treatment increased significantly by 46.4% compared with N₀ treatment, and there was no significant difference between N₀, N₁₅₀ and N₂₁₀ treatment. Under low fertility conditions, compared with N₀ treatment, the annual CH₄ emissions of N₉₀ treatment significantly increased 82.8% while N₁₅₀ and N₂₁₀ treatment had no significant difference; under medium and high fertility conditions, there was no significant difference in annual CH₄ emission among different nitrogen application treatments. Soil fertility and nitrogen application rates had significant interaction effects on CH₄ emissions in early and annual rice season, but had no significant interaction effects on CH₄ emissions in late rice season.

Key words: soil, fertility, nitrogen application rate, double cropping of rice, CH₄ emission

中图分类号:

S511.062

贾震, 付文涛, 王海媛, 陈金, 曾勇军, 黄山. 红壤稻田不同肥力水平和施氮量对早晚季甲烷排放的互作效应[J]. 中国稻米, 2023, 29(6): 61-66.

JIA Zhen, FU Wentao, WANG Haiyuan, CHEN Jin, ZENG Yongjun, HUANG Shan. Interactive Effects of Different Fertility Levels and Nitrogen Application Rates on Methane Emissions in Early and Late Season of Red Soil Rice Fields[J]. China Rice, 2023, 29(6): 61-66.

图/表 4

表1 不同肥力土壤基本理化性质

图1 不同土壤肥力与施氮量对甲烷排放通量的影响 FL、FM、FH分别代表低肥力、中肥力、高肥力；N0、N90、N150、N210分别表示不施氮、施氮量90、150和210 kg/hm2；误差线代表平均值的标准差（n=3）。下同。

图 2 土壤肥力和施氮量对双季稻甲烷累积排放的主效应图中不同小写字母表示不同处理间差异在0.05水平显著；误差线代表平均值的标准差（n=3）。

表2 土壤肥力和施氮量对双季稻甲烷累积排放量的互作效应（单位：kg/hm2）

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红壤稻田不同肥力水平和施氮量对早晚季甲烷排放的互作效应

Interactive Effects of Different Fertility Levels and Nitrogen Application Rates on Methane Emissions in Early and Late Season of Red Soil Rice Fields

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