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| 炭基牛粪有机肥对盐渍化水稻土水稳性团聚体组成和有机碳分布的影响 |
| Effects of carbon-based cow manure organic fertilizer on water-stable aggregate composition and organic carbon distribution in salinized paddy soil |
| 投稿时间：2024-07-30 |
| DOI：10.13254/j.jare.2024.0591 |
| 中文关键词: 炭基有机肥，水稳性团聚体，土壤有机碳，活性有机碳 |
| 英文关键词: carbon-based organic fertilizer, water-stable aggregate, soil organic carbon, labile organic carbon |
| 基金项目:吉林省重大科技专项（20230302010NC） |
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| 中文摘要: |
| 为探究施用不同炭基牛粪有机肥对盐渍化水稻土水稳性团聚体组成及不同活性有机碳含量的影响，明确其对盐渍化水稻土结构改良及固碳效果，本研究通过田间试验设对照（CK）、牛粪有机肥（NF）、10%炭基牛粪有机肥（10% NFC）、30%炭基牛粪有机肥（30% NFC）、牛粪生物炭（NFC）5个处理，研究了水稻产量，土壤及水稳性团聚体有机碳（SOC）、活性有机碳（LOC）和非活性有机碳（NLOC）含量，各有机碳组分贡献率，水稳性团聚体组成和稳定性及其与团聚体有机碳组分的相关关系等。结果显示：与CK处理相比，不同施肥处理均对盐渍化水稻土有明显的改良效果，其中，NF处理对全土活性有机碳含量提升效果最显著，提升幅度为54.37%；NFC处理使全土有机碳含量显著提升了42.02%；两种炭基牛粪有机肥处理对盐渍化水稻土的改良效果更显著，10% NFC处理相较于30% NFC处理更有助于提高土壤有机碳含量、0.053~<0.25 mm和<0.053 mm团聚体有机碳含量、水稳性团聚体平均质量直径（MWD）、几何平均直径（GMD）和≥0.25 mm团聚体含量（R0.25），提高幅度分别为0.56%、2.33%、3.04%、7.69%、5.56%和3.18个百分点；30% NFC处理相较于10% NFC处理使土壤活性有机碳、≥2 mm和0.25~<2 mm团聚体有机碳含量以及各粒级水稳性团聚体活性有机碳含量分别显著提高了7.58%、3.41%、7.59%和2.16%~13.05%；各施肥处理对水稻产量增加幅度为15.18%~25.45%，30% NFC处理增产效果最佳。研究表明，炭基牛粪有机肥能更有效地促进土壤水稳性大团聚体的形成，提高团聚体稳定性，促进团聚体有机碳的积累，且有利于团聚体活性有机碳含量的提高，从而改善盐渍化水稻土并提高其土壤有机碳含量。 |
| 英文摘要: |
| Field experient was carried out in order to explore the effects of different carbon-based cow manure organic fertilizers on the composition of water-stable aggregates and different active organic carbon contents in salinized paddy soil, and to clarify their effects on structural improvement and carbon sequestration of salinized paddy soil. The experiment was divided into five treatments：control（CK）, cow manure organic fertilizer（NF）, 10% carbon-based cow manure organic fertilizer（10%NFC）, 30% carbon-based cow manure organic fertilizer（30%NFC）and cow manure biochar（NFC）. The rice yield, the contents of soil organic carbon（SOC）, labile organic carbon （LOC） and non-labile organic carbon （NLOC） in soil and water-stable aggregates, the contribution rate of organic each carbon components, the composition and stability of water-stable aggregates and their correlation with aggregate organic carbon components were studied. The results showed that compared with the control treatment, different fertilization treatments had obvious improvement effect on salinized paddy soil. Among them, the treatment of cow manure organic fertilizer had the most significant effect on the increase of labile organic carbon in the whole soil, with an increase of 54.37%, and the treatment of cow manure biochar significantly increased the organic carbon content of the whole soil by 42.02%. The improvement effect of two carbon-based cow manure organic fertilizer treatments on salinized paddy soil was more significant. Compared with 30% carbon-based cow manure organic fertilizer treatment, 10% carbon-based cow manure organic fertilizer treatment was more helpful to increase soil organic carbon content, 0.053 -<0.25 mm and <0.053 mm aggregate organic carbon content, average weight diameter（MWD）, geometric mean diameter（GMD）and ≥0.25 mm aggregate content （R0.25）in water-stable aggregates, with increases of 0.56%, 2.33%, 3.04%, 7.69%, 5.56% and 3.18 percentage points, respectively. Compared with 10% carbon-based cow manure organic fertilizer treatment, 30% carbon-based cow manure organic fertilizer treatment significantly increased the content of soil labile organic carbon, the organic carbon content of ≥2 mm and 0.25 -<2 mm aggregates and labile organic carbon content of water-stable aggregates of each particle size by 7.58%, 3.41%, 7.59% and 2.16%-13.05%, respectively. The increase of rice yield in each fertilizer treatment was 15.18% - 25.45%, and the effect of 30% carbon-based cow manure organic fertilizer treatment was the best. Studies have shown that carbon-based cow manure organic fertilizer can more effectively promote the formation of soil water-stable aggregates, improve the stability of aggregates, promote the accumulation of organic carbon in aggregates, and is conducive to the increase of labile organic carbon content in aggregates, so as to improve salinized paddy soil and increase its soil organic carbon content. |
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