半干旱地区改变地膜覆盖方式能否提高土壤有机碳固存和碳库管理指数？

doi:10.1016/j.jia.2023.05.011

Journal of Integrative Agriculture ›› 2024, Vol. 23 ›› Issue (5): 1541-1556.DOI: 10.1016/j.jia.2023.05.011

半干旱地区改变地膜覆盖方式能否提高土壤有机碳固存和碳库管理指数？

收稿日期:2023-02-27 接受日期:2023-04-20 出版日期:2024-05-20 发布日期:2024-04-23

Can soil organic carbon sequestration and the carbon management index be improved by changing the film mulching methods in the semiarid region?

Jialin Yang^{1, 2}, Liangqi Ren¹, Nanhai Zhang^{1, 2}, Enke Liu³, Shikun Sun⁴, Xiaolong Ren^{1, 2}, Zhikuan Jia^{1, 2}, Ting Wei^{1, 2}, Peng Zhang^{1, 2#}

¹College of Agronomy, Northwest A&F University, Yangling 712100, China
²Key Laboratory of Crop Physi-Ecology and Tillage Science in Northwestern Loess Plateau, Ministry of Agriculture and Rural Afairs, Northwest A&F University, Yangling 712100, China
³Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
⁴College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China

Received:2023-02-27 Accepted:2023-04-20 Online:2024-05-20 Published:2024-04-23
About author:YANG Jia-lin, E-mail: yangjialin@nwafu.edu.cn; Correspondence ZHANG Peng, Tel: +86-29-87080168 , E-mail: pengzhang121@hotmail.com
Supported by:
This research was supported by the National Key Research and Development Program of China (2021YFE0101302 and 2021YFD1901102) and the National Natural Science Foundation of China (31801314 and 31901475).

摘要/Abstract

摘要：

在中国半干旱地区，地膜覆盖已被广泛应用于提高玉米产量。然而，长期地膜覆盖是否有利于该地区的农业可持续性仍存在争议。从2013年开始，采用不同的地膜覆盖方法进行了田间试验，包括对照：传统裸地平作（CK）、半膜平覆盖（P）、窄沟垄膜集雨（S）、全膜双垄沟（D）和沟垄根域集雨（R），以评价连续9年地膜覆盖对土壤有机碳（SOC）含量、储量、组分和碳库管理指数（CMI）的影响。结果表明，长期地膜覆盖总体而言维持了初始SOC水平。与不覆盖相比，地膜覆盖平均使作物产量、生物量产量和根系生物量分别提高了48.38%、35.06和37.32%，从而提高了土壤有机碳固存。具体而言，地膜覆盖显著改善了CMI，平均增加了13.59%的SOC含量、7.47%的SOC储量和13.78%的易氧化有机碳（EOC）含量，但降低了其他不稳定组分。通过改变地膜覆盖方式，提高了土壤有机碳的固存和CMI，其中S处理效果最好，可作为半干旱地区农业可持续发展的合理地膜覆盖方式。

Abstract:

Plastic film mulching has been widely used to increase maize yield in the semiarid area of China. However, whether long-term plastic film mulching is conducive to agricultural sustainability in this region remains controversial. A field experiment was initiated in 2013 with five different film mulching methods: (i) control method, flat planting without mulching (CK), (ii) flat planting with half film mulching (P), (iii) film mulching on ridges and planting in narrow furrows (S), (iv) full film mulching on double ridges (D), and (v) film mulching on ridges and planting in wide furrows (R). The effects on soil organic carbon (SOC) content, storage, and fractions, and on the carbon management index (CMI) were evaluated after nine consecutive years of plastic film mulching. The results showed that long-term plastic film mulching generally maintained the initial SOC level. Compared with no mulching, plastic film mulching increased the average crop yield, biomass yield, and root biomass by 48.38, 35.06, and 37.32%, respectively, which led to the improvement of SOC sequestration. Specifically, plastic film mulching significantly improved CMI, and increased the SOC content by 13.59%, SOC storage by 7.47% and easily oxidizable organic carbon (EOC) by 13.78% on average, but it reduced the other labile fractions. SOC sequestration and CMI were improved by refining the plastic film mulching methods. The S treatment had the best effect among the four mulching methods, so it can be used as a reasonable film mulching method for sustainable agricultural development in the semiarid area.

Key words: plastic-film mulching , soil organic carbon , labile organic carbon fractions , semiarid area

. 半干旱地区改变地膜覆盖方式能否提高土壤有机碳固存和碳库管理指数？[J]. Journal of Integrative Agriculture, 2024, 23(5): 1541-1556.

Jialin Yang, Liangqi Ren, Nanhai Zhang, Enke Liu, Shikun Sun, Xiaolong Ren, Zhikuan Jia, Ting Wei, Peng Zhang.

Can soil organic carbon sequestration and the carbon management index be improved by changing the film mulching methods in the semiarid region? [J]. Journal of Integrative Agriculture, 2024, 23(5): 1541-1556.

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半干旱地区改变地膜覆盖方式能否提高土壤有机碳固存和碳库管理指数？

Can soil organic carbon sequestration and the carbon management index be improved by changing the film mulching methods in the semiarid region?

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