Cotton Grown in Rotation with Soybean Alters Soil Organic Matter over Time

IF 1.4 4区农林科学 Q4 SOIL SCIENCE Eurasian Soil Science Pub Date : 2024-07-30 DOI:10.1134/s1064229324600611

Jun Zhang, Fenghua Zhang

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Abstract

Crop rotation could effectively alleviate continuous cropping problems, but how it affects soil organic carbon (SOC) components and chemical structures in case of different duration of continuous cropping (CC) remains unclear. In this study, we selected cotton fields that had been continuously planted for 5, 10, 15, and 20 years for separate soybean rotations (SR). The mechanism of SR to improve soil quality in different duration of CC was determined by SOC components and their chemical structure. The results showed that the content of soil available nutrients, SOC, microbial biomass carbon and soluble organic carbon in the SR treatments significantly increased compared with those in the CC treatment (p < 0.05), but particulate organic carbon content decreased by 24.89–81.10%. Compared with CC in different years, SR treatments significantly reduced soil humus content. SR in 5, 10 and 15 years of CC cotton fields significantly increased the content of sucrase and decreased that of polyphenol oxidase. Compared with CC fields in different years (5-y, 10-y, 15-y, 20-y), SR increased the relative peak intensity of polysaccharides and decreased the relative peak intensity of alcohols and phenols. Among them, the relative peak intensity of R5-y, R10-y and R20-y aliphatic compounds increased, while that of R5-y, R15-y and R20-y aromatic compounds decreased, and R10-y recalcitrant components (Aliphatic + Aromatic) increased.

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棉花与大豆轮作种植会随时间改变土壤有机质

摘要轮作可以有效缓解连作问题，但轮作如何影响不同连作期（CC）的土壤有机碳（SOC）成分和化学结构仍不清楚。在本研究中，我们选择了连续种植 5 年、10 年、15 年和 20 年的棉田分别与大豆进行轮作（SR）。通过 SOC 成分及其化学结构确定了 SR 在不同的 CC 期改善土壤质量的机制。结果表明，SR 处理的土壤可利用养分、SOC、微生物生物量碳和可溶性有机碳含量与 CC 处理相比显著增加（p < 0.05），但颗粒有机碳含量减少了 24.89%-81.10%。与不同年份的 CC 相比，SR 处理明显降低了土壤腐殖质含量。在 5 年、10 年和 15 年的 CC 棉花田中，SR 能显著提高蔗糖酶的含量，降低多酚氧化酶的含量。与不同年份（5 年、10 年、15 年、20 年）的 CC 棉花田相比，SR 提高了多糖的相对峰强度，降低了醇和酚的相对峰强度。其中，R5-y、R10-y和R20-y脂肪族化合物的相对峰强度增加，而R5-y、R15-y和R20-y芳香族化合物的相对峰强度降低，R10-y难溶组分（脂肪族+芳香族）的相对峰强度增加。

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来源期刊

Eurasian Soil Science 农林科学-土壤科学

CiteScore

2.70

自引率

35.70%

发文量

137

审稿时长

12-24 weeks

期刊介绍： Eurasian Soil Science publishes original research papers on global and regional studies discussing both theoretical and experimental problems of genesis, geography, physics, chemistry, biology, fertility, management, conservation, and remediation of soils. Special sections are devoted to current news in the life of the International and Russian soil science societies and to the history of soil sciences. Since 2000, the journal Agricultural Chemistry, the English version of the journal of the Russian Academy of Sciences Agrokhimiya, has been merged into the journal Eurasian Soil Science and is no longer published as a separate title.