不同氮肥施用量对茶园土壤镁沥滤的影响

IF 3.4 3区 农林科学 Q2 ENVIRONMENTAL SCIENCES
Sen Wang, Wei Lin, Qi Ye, Wenzhuo Lv, Penghui Liao, Jinhui Yu, Cong Mu, LiangQuan Wu, Muhammad Atif Muneer, Yinjie Zhang, Runzhi Zhan, Aolin Wu, Huihuang Wu, Chengcong Chen, Huogui Su, Yanhua Chen, Zongbo Wang, Zetian Zhang, Hao Ji, Lijin Guo
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引用次数: 0

摘要

镁(Mg)有助于提高茶叶产量和品质,但中国许多茶园普遍存在缺镁现象。因此,研究茶园土壤中 Mg2+ 的淋溶机制具有重要意义。本研究通过盆栽实验研究氮肥施用如何影响土壤中镁的淋溶机制。对照组(N0)包括没有茶苗的花盆,不添加氮肥溶液,只使用等量的超纯水。实验组为N1(无茶苗,0.75 mmol L- 1 氮)、N2(无茶苗,1.5 mmol L- 1 氮)、N3(无茶苗,3.0 mmol L- 1 氮)、TN0(茶苗,无氮)、TN1(茶苗,0.75 mmol L- 1 氮)、TN2(茶苗,1.5 mmol L- 1 氮)和 TN3(茶苗,3.0 mmol L- 1 氮)。结果表明,有茶苗的土壤中硝态氮(NO3--N)、铵态氮(NH4+-N)和镁之间的相关性高于无茶苗的土壤。这表明茶叶种植促进了土壤中 Mg2+ 的浸出。进一步调查发现,过量施氮会降低土壤 pH 值,激活土壤中的铝离子(Al3+),与 Mg2+ 争夺净吸附位点,进一步加剧 Mg2+ 的淋失。此外,过量施用氮肥会限制根系吸收养分的能力,间接导致 Mg2+ 的沥滤。我们认为,茶园过量施用氮肥会加剧土壤中 Mg2+ 的沥滤。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effects of Different Nitrogen Fertilizer Rates on Soil Magnesium Leaching in Tea Garden

Effects of Different Nitrogen Fertilizer Rates on Soil Magnesium Leaching in Tea Garden

Magnesium (Mg) helps improve tea yield and quality, yet many tea plantations in China commonly exhibit magnesium deficiency. Therefore, studying the mechanisms of Mg2+ leaching in tea plantation soils is of significant importance. This study investigates how nitrogen fertilizer application affects the leaching mechanisms of magnesium in soil through pot experiments. The control group (N0) consisted of pots without tea seedlings and no nitrogen fertilizer solution added, only an equivalent amount of ultrapure water was used. The experimental groups were: N1 (no tea seedlings, 0.75 mmol L− 1 nitrogen), N2 (no tea seedlings, 1.5 mmol L− 1 nitrogen), N3 (no tea seedlings, 3.0 mmol L− 1 nitrogen), TN0 (tea seedlings, no nitrogen), TN1 (tea seedlings, 0.75 mmol L− 1 nitrogen), TN2 (tea seedlings, 1.5 mmol L− 1 nitrogen), and TN3 (tea seedlings, 3.0 mmol L− 1 nitrogen). The results show that the correlation between nitrate nitrogen (NO3-N), ammonium nitrogen (NH4+-N), and Mg in the soil with tea seedlings is higher than in soil without tea seedlings. This indicates that tea planting promotes the leaching of Mg2+ in the soil. Further investigation revealed that excessive nitrogen application reduces the soil pH, activates aluminum ions (Al3+) in the soil, and competes with Mg2+ for net adsorption sites, further exacerbating the leaching of Mg2+. Additionally, excessive use of nitrogen fertilizer limits the roots’ ability to absorb nutrients, indirectly leading to the leaching of Mg2+. We believe that excessive application of nitrogen fertilizer in tea gardens will exacerbate the leaching of Mg2+ in the soil.

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来源期刊
Journal of Soil Science and Plant Nutrition
Journal of Soil Science and Plant Nutrition Agricultural and Biological Sciences-Soil Science
CiteScore
5.90
自引率
10.30%
发文量
331
审稿时长
9 months
期刊介绍: The Journal of Soil Science and Plant Nutrition is an international, peer reviewed journal devoted to publishing original research findings in the areas of soil science, plant nutrition, agriculture and environmental science. Soil sciences submissions may cover physics, chemistry, biology, microbiology, mineralogy, ecology, pedology, soil classification and amelioration. Plant nutrition and agriculture submissions may include plant production, physiology and metabolism of plants, plant ecology, diversity and sustainability of agricultural systems, organic and inorganic fertilization in relation to their impact on yields, quality of plants and ecological systems, and agroecosystems studies. Submissions covering soil degradation, environmental pollution, nature conservation, and environmental protection are also welcome. The journal considers for publication original research articles, technical notes, short communication, and reviews (both voluntary and by invitation), and letters to the editor.
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