玉米秸秆覆盖还田量对免耕土壤有机碳中红外光谱特征的影响

doi:10.13287/j.1001-9332.202108.022

应用生态学报 ›› 2021, Vol. 32 ›› Issue (8): 2685-2692.doi: 10.13287/j.1001-9332.202108.022

玉米秸秆覆盖还田量对免耕土壤有机碳中红外光谱特征的影响

朱雪峰^1,2, 张春雨³, 郝艳杰³, 鲍雪莲^1,2, 霍海南^1,2, 何红波^1,2, 梁超^1,2, 解宏图^1,2*

¹中国科学院沈阳应用生态研究所, 沈阳 110016;
²辽宁省现代保护性耕作与生态农业重点实验室, 沈阳 110016;
³吉林省梨树县农业技术推广总站, 吉林梨树 136500

收稿日期:2020-12-29 接受日期:2021-05-25 出版日期:2021-08-15 发布日期:2022-02-15
通讯作者: *E-mail: xieht@iae.ac.cn
作者简介:朱雪峰, 女, 1992年生, 博士。主要从事土壤微生物生态学研究。E-mail: zhuxuefeng@iae.ac.cn
基金资助:
国家自然科学基金项目(41671297)、中国科学院沈阳应用生态研究所青年启动基金项目(E061272)、国家重点研发计划项目(2016YFD0200307)和中国科学院特别研究助理项目(2020,朱雪峰)资助

Effects of corn stover mulch quantity on mid-infrared spectroscopy of soil organic carbon in a no-tillage agricultural ecosystem

ZHU Xue-feng^1,2, ZHANG Chun-yu³, HAO Yan-jie³, BAO Xue-lian^1,2, HUO Hai-nan^1,2, HE Hong-bo^1,2, LIANG Chao^1,2, XIE Hong-tu^1,2*

¹Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
²Liaoning Province Key Laboratory of Conservation Tillage and Ecological Agriculture, Shenyang 110016, China;
³Lishu Agricultural Technology Extension Station, Lishu 136500, Jilin, China

Received:2020-12-29 Accepted:2021-05-25 Online:2021-08-15 Published:2022-02-15
Contact: *E-mail: xieht@iae.ac.cn
Supported by:
National Natural Science Foundation of China (41671297), Youth Start-up Foundation of Institute of Applied Ecology, Chinese Academy of Sciences (E061272), the National Key R&D Program of China (2016YFD0200307) and Chinese Academy of Sciences Foundation for Special Research Assistant (2020, Zhu Xuefeng).

摘要/Abstract

摘要： 依托位于中国东北黑土地区长期免耕玉米秸秆还田试验平台,分析了不同秸秆还田量(0、33%、67%和100%)连续归还8年后表层(0～5 cm)、中层(20～40 cm)和深层(60～100 cm)土壤有机碳中红外光谱特征,评价了玉米秸秆还田量对免耕土壤碳化学组成和稳定性的影响。结果表明: 与免耕无秸秆覆盖还田相比,33%与100%秸秆还田均有利于表层和中层多糖组分的积累,但前者降低了表层土壤碳组成多样性,而后者有利于各层次土壤碳化学稳定性的维持;67%秸秆还田提高了深层土壤碳化学稳定性。综上,当秸秆资源充足时,免耕结合100%全量秸秆还田可在提高0～40 cm土层微生物可利用碳底物的基础上,维持土壤碳的化学稳定性。秸秆还田量与土壤中红外光谱特征间无线性关联,表明亟需挖掘不同秸秆还田量处理下土壤碳周转的微生物参与机制。

关键词: 土壤碳化学组成, 中红外光谱, 土壤碳化学稳定性, 保护性耕作, 深层土壤碳

Abstract: We examined carbon chemical composition and stability along soil depth (topsoil 0-5 cm, mid-soil 20-40 cm, and deep soil 60-100 cm) in a no-tillage (NT) agricultural system with various amount of corn stover as mulch for 8 years, including 0 (NT₀), 33% (NT₃₃), 67% (NT₆₇) and 100% (NT₁₀₀), in Northeast China, using mid-infrared spectroscopy. The results showed that, relative to NT₀, the treatments of NT₃₃ and NT₁₀₀ increased polysaccharide content of the top layer and mid-layer soils, the former decreased topsoil carbon component diversity, while the latter maintained soil carbon stability of three soil layers. NT₆₇ increased carbon stability at the deep layer soil. Our results demonstrated that if corn stover resources were sufficient, NT with 100% corn stover mulch could both be beneficial to carbon availability at 0-40 cm soil layer and stability of the whole soil profile. The nonlinear relationship between the amount of corn stover mulch and the mid-infrared spectral characteristics of the soil called for further research on the microbial-control mechanism over soil carbon cycling under different amounts of corn stover mulch.

Key words: soil carbon chemical composition, mid-infrared spectroscopy, soil carbon stability, conservational tillage, deep soil carbon

朱雪峰, 张春雨, 郝艳杰, 鲍雪莲, 霍海南, 何红波, 梁超, 解宏图. 玉米秸秆覆盖还田量对免耕土壤有机碳中红外光谱特征的影响[J]. 应用生态学报, 2021, 32(8): 2685-2692.

ZHU Xue-feng, ZHANG Chun-yu, HAO Yan-jie, BAO Xue-lian, HUO Hai-nan, HE Hong-bo, LIANG Chao, XIE Hong-tu. Effects of corn stover mulch quantity on mid-infrared spectroscopy of soil organic carbon in a no-tillage agricultural ecosystem[J]. Chinese Journal of Applied Ecology, 2021, 32(8): 2685-2692.

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玉米秸秆覆盖还田量对免耕土壤有机碳中红外光谱特征的影响

Effects of corn stover mulch quantity on mid-infrared spectroscopy of soil organic carbon in a no-tillage agricultural ecosystem

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