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| 蔗叶还田下不同施肥模式对旱地红壤肥力及稳定性的影响 |
| Effects of different fertilization modes on the fertility and stability of red soil in upland under sugarcane leaf returning to field |
| 投稿时间：2024-11-03 |
| DOI：10.13254/j.jare.2024.0874 |
| 中文关键词: 秸秆还田，有机肥替代，红壤，土壤养分，团聚体稳定性 |
| 英文关键词: straw returning, organic fertilizer substitution, red soil, soil fertility, aggregate stability |
| 基金项目:国家自然科学基金项目（42177299） |
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| 中文摘要: |
| 为探索蔗叶还田下不同施肥模式对土壤改良的效果，提出优化组合，本研究以华南地区广泛分布的红壤为研究对象，通过盆栽试验，研究了蔗叶还田（S）与不还田条件下不施肥（CK）、常规施肥（F0）、鸽粪有机肥替代 15%化肥（F1）、鸽粪有机肥替代30%化肥（F2）、优施化肥（FC）5个施肥模式对土壤肥力和团聚体粒级分布与稳定性等土壤性状的影响。结果表明：相同施肥处理下，与不还田相比，蔗叶还田显著提升了土壤肥力与稳定性。与SCK相比，SF1处理土壤有机质显著提升31.7%，SF1土壤养分含量增幅为21.0%~187.5%。各施肥处理较不施肥均呈现<0.25 mm团聚体比例下降、0.25~1 mm和>1 mm大团聚体比例上升的趋势，其中SF1处理平均质量直径、几何平均直径值分别显著提高54.0%、88.1%，<0.25 mm微团聚体比例显著降低28.4%（P<0.05）。研究表明，蔗叶还田结合科学施肥能够提升红壤肥力和团聚体稳定性，其中结合鸽粪有机肥替代15%化肥处理提升效果最佳。 |
| 英文摘要: |
| To explore the effects of different fertilization modes on soil improvement under the return of sugarcane leaves to the field and to an optimized combination, this study focused on the widely distributed red soil in southern China. Through pot experiments, the effects of five fertilization modes, including sugarcane leaf return（S）and no fertilization（CK）, conventional fertilization（F0）, pigeon manure organic fertilizer replacing 15% fertilizer（F1）, pigeon manure organic fertilizer replacing 30% fertilizer（F2）, and optimal fertilizer application （FC）, on soil fertility, aggregate size distribution and stability, and other soil properties were studied. Results showed that under the same fertilization treatment, returning sugarcane leaves to the field significantly improved soil fertility and stability compared with no-return treatments. Compared with SCK, SF1 treatment significantly increased soil organic matter by 31.7%, and soil nutrient contents by 21.0%-187.5%. All fertilization treatments showed lower proportion of <0.25 mm aggregates and an higher proportion of 0.25-1 mm and >1 mm macroaggregates compared with treatments without fertilizer. Among them, the MWD and GMD values of SF1 treatment significantly increased 54.0%, 88.1%, respectively, while the proportion of <0.25 mm microaggregates significantly decreased 28.4%（P<0.05）. The combination of sugarcane top returning and fertilization can improve the fertility and aggregate stability of red soil, and SF1 has the best effect. |
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