| 化肥减施下有机物料对砂姜黑土有机碳组分和养分含量的影响 |
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| 引用本文： | 吴萍萍,王静,李录久,汪霄.化肥减施下有机物料对砂姜黑土有机碳组分和养分含量的影响[J].核农学报,2022,36(11):2286-2294. |
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| 作者姓名： | 吴萍萍 王静 李录久 汪霄 |
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| 作者单位： | 安徽省农业科学院土壤肥料研究所/安徽养分循环与资源环境省级实验室,安徽 合肥 230031 |
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| 基金项目： | 安徽省科技厅农(林)业综合实验站和农技推广示范基地绩效奖励项目(202001q06030017);国家重点研发计划课题(2018YFD0200505) |
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| 摘 要： | 为探明氮、磷、钾化肥减施下有机物料对砂姜黑土固碳培肥的影响,于2018—2020年开展大田试验,设置常规单施化肥(F)、常规施肥+生物炭(F+B)、化肥减量20%+生物炭(80%F+B)、常规施肥+秸秆还田(F+S)、化肥减量20%+秸秆还田(80%F+S)5个处理,分析水稻季化肥减量配施生物炭或秸秆还田对土壤总有机碳和活性有机碳含量、所占比例,碳库管理指数及养分含量的影响。结果表明,相较于单施化肥,常规施肥下增施生物炭土壤总有机碳含量显著提高19.6%。化肥减量配施有机物料显著提高了土壤水溶性有机碳、颗粒有机碳和易氧化有机碳含量,较F处理分别增加21.6%~28.6%、46.2%~61.1%和16.2%~36.3%,其中80%F+S处理土壤易氧化有机碳和颗粒有机碳含量、所占比例及土壤碳库管理指数均最高。F+B处理土壤有效磷和速效钾含量最高,较F处理分别提高11.1%和30.8%,其他处理有效磷含量则降低6.5%~15.7%。主成分分析表明,活性有机碳组分和碳库管理指数在80%F+S处理中具有较高载荷,而F+B处理土壤有效磷、pH和速效钾因子得分较高。化肥减施下秸秆还田有利于提高砂姜黑土活性有机碳含量、所占比例及碳库管理指数,而常规施肥下配施生物炭能够促进土壤总有机碳积累和磷、钾有效性。本研究结果可为沿淮平原稻麦轮作区化肥减量增效、农业废弃物资源化利用提供技术支撑。
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| 关 键 词： | 化肥减施 生物炭 秸秆还田 活性有机碳 碳库管理指数 |
| 收稿时间： | 2021-11-15 |
Effects of Organic Materials Applications on Soil Organic Carbon Fractions and Nutrient Contents in Lime Concretion Black Soil Under Chemical Fertilizer Reduction |
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| WU Pingping,WANG Jing,LI Lujiu,WANG Xiao.Effects of Organic Materials Applications on Soil Organic Carbon Fractions and Nutrient Contents in Lime Concretion Black Soil Under Chemical Fertilizer Reduction[J].Acta Agriculturae Nucleatae Sinica,2022,36(11):2286-2294. |
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| Authors: | WU Pingping WANG Jing LI Lujiu WANG Xiao |
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| Institution: | Institute of Soil & Fertilizer, Anhui Academy of Agriculture Sciences/Anhui Key Lab of Nutrient Cycling, Resources & Environment, Hefei, Anhui 230031 |
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| Abstract: | A field experiment was conducted from 2018 to 2020 to study effects of biochar and straw under chemical fertilizer N, P, K reduction to carbon fixation and soil fertility in lime concretion black soil. Five treatments were set up including conventional application of chemical fertilizer (F), chemical fertilizer plus biochar (F+B), 20% reduction of chemical fertilizer plus biochar (80%F+B), chemical fertilizer plus straw returning (F+S), and 20% reduction of chemical fertilizer plus straw returning (80%F+S). The contents of soil total organic carbon and active organic carbon, carbon pool management index and nutrients were determined in rice planting season. The results showed that the contents of soil total organic carbon significantly increased by 19.6% in F+B treatment compared to F treatment. The application of organic materials under chemical fertilizer reduction significantly increased the contents of dissolved organic carbon, particulate organic carbon and labile organic carbon by 21.6% ~ 28.6%, 46.2% ~ 61.1% and 16.2% ~ 36.3%, respectively, of which the contents and proportion of labile organic carbon and particulate organic carbon and carbon pool management index were the highest in 80%F+S treatment. The maximum available phosphorus and available potassium were observed in F+B treatment, with 11.1% and 30.8% higher than that in F treatment, respectively, whereas the contents of available phosphorus in other treatments decreased by 6.5% ~ 15.7%. Principal component analysis showed that, active organic carbon and carbon pool management index had higher loading in 80%F+S treatment, and the scores of available phosphorus, pH and available potassium were higher in F+B treatment. Straw returning under chemical fertilizer reduction was beneficial to improve the contents and proportion of active organic carbon and carbon pool management index in lime concretion black soil, and the combined application of biochar under conventional fertilization promoted the accumulation of soil total organic carbon and the availability of phosphorus and potassium. The results provided technical support for the application reduction and efficiency improvement of chemical fertilizer and the resource utilization of agricultural waste in the rice-wheat rotation area in the Huai River Plain. |
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| Keywords: | chemical fertilizer reduction biochar straw returning active organic carbon carbon pool management index |
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