引用本文:何 伟,王 会,韩 飞,胡国庆,娄燕宏,宋付朋,潘 红,魏 猛,诸葛玉平.长期施用有机肥显著提升潮土有机碳组分[J].土壤学报,2020,57(2):425-434. DOI:10.11766/trxb201902180011
HE Wei,WANG Hui,HAN Fei,HU Guoqing,LOU Yanhong,SONG Fupeng,PAN Hong,WEI Meng,ZHUGE Yuping.Effect of Long-term Application of Organic Manure Expanding Organic Carbon Fractions in Fluvo-aquic Soil[J].Acta Pedologica Sinica,2020,57(2):425-434. DOI:10.11766/trxb201902180011
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长期施用有机肥显著提升潮土有机碳组分
何 伟1, 王 会1, 韩 飞1, 胡国庆2, 娄燕宏2, 宋付朋2, 潘 红1, 魏 猛3, 诸葛玉平2
1.土肥资源高效利用国家工程实验室,山东农业大学资源与环境学院;2.土肥资源高效利用国家工程实验室,山东农业大学资源与环境学院;3.江苏徐淮地区徐州农业科学研究所
摘要:
借助潮土36 a长期定位施肥试验平台,利用物理化学相结合的方法,研究了不同施肥处理对耕层土壤有机碳组分的影响。试验处理包括不施肥(CK)、施氮磷钾肥不同组合(N、NP、NPK)、施有机肥(M)、施氮肥和有机肥(MN)、施氮磷肥和有机肥(MNP)及施氮磷钾肥和有机肥(MNPK)。结果表明:施肥能显著提高土壤易氧化有机碳(EOC)含量,与CK相比,MNPK处理提高效果最为显著,增幅为72.17%;NPK处理对颗粒有机碳(POC)和矿物结合态有机碳(MOC)含量的提升效果高于N处理,但低于施有机肥处理;施有机肥处理的POC含量较不施有机肥处理平均增加92.69%,与CK相比,MNPK处理的POC分配比例增加了13.33%;施有机肥条件下,所增加的总有机碳对MOC的贡献率明显提高,MNPK处理所增加的总有机碳可1:1进入POC和MOC组分。有机肥施用尤其是氮磷钾平衡施用并增施有机肥,能有效改善土壤化学性质、提升土壤碳组分含量、促进新碳在各碳组分均衡分配。
关键词:  土壤碳组分  有机无机配施  平衡施肥  潮土
基金项目:国家自然科学基金项目(41601237,41701257,41771273)资助
Effect of Long-term Application of Organic Manure Expanding Organic Carbon Fractions in Fluvo-aquic Soil
HE Wei,WANG Hui,HAN Fei,HU Guoqing,LOU Yanhong,SONG Fupeng,PAN Hong,WEI Meng,ZHUGE Yuping
1.National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University;2.Xuzhou Institute of Agricultural Sciences of the Xuhuai District
Abstract:
【Objective】Based on a 36-year fertilization experiment in a field of fluvo-aquic soil, effects of fertilization, especially application of organic manure, on organic carbon fractions in the plow layer were studied in an attempt to learn comprehensively how soil carbon changes and explore effects of fertilization on the status of soil organic carbon through analysis and evaluation of soil organic carbon fractions, so as to better master the physico-chemical and biological mechanisms of the changes in soil organic carbon fractions as affected by long-term fertilization and to provide scientific basis for decision-making for fertilization in sustainable development of agriculture. 【Method】 In this study, physical means were used in combination with chemical ones to determine contents of organic carbon, easily oxidized organic carbon, particulate organic carbon and mineral incorporated organic carbon in soils, and effects of fertilization on soil organic carbon fractions were analyzed. To that end the experiment in the study was designed to have 8 treatments, that is, no fertilization (CK), application of N alone (N), application of N and P (NP), application of N, P and K (NPK), application of organic manure (M), application of nitrogen fertilizer plus organic manure (MN), application of nitrogen and phosphorus fertilizers plus organic manure (MNP), and application of nitrogen, phosphorus and potassium fertilizers plus organic manure (MNPK). 【Result】Results show that long-term fertilization significantly improved soil fertility. Application of organic manure was closely related to increase in soil organic carbon, particulate organic carbon and mineral incorporated organic carbon. Fertilization significantly increased the content of easily oxidized organic carbon (EOC) in the soil. The effect was the most significant in Treatment MNPK with an increase up to 72.13% as compared with CK, while EOC content in Treatment MN, MNP and MNPK increased by 23.18%, 12.53% and 25.92%, respectively, as compared with their respective chemical counterparts, Treatment N, NP and NPK. Fertilization (except for N application alone) significantly increased the content of soil particulate organic carbon (POC). The effect was particularly significant in organic manure-amended treatments, whose mean POC content was 92.69% higher than that of the treatments without organic manure. The content of mineral incorporated organic carbon (MOC) in the organic manure amended treatments was 10.06% higher than that in CK,. The proportion of particulate organic carbon (POC/SOC) in Treatment MNPK increased by 13.33%, while the proportion of mineral incorporated organic carbon (MOC/SOC) decreased correspondingly, as compared with those in CK. Application of organic manure significantly enhanced the contribution of increased total organic carbon to MOC, especially Treatment MNPK where the increased total organic carbon and the native total organic carbon formed a ratio of 1:1 in POC and MOC. 【Conclusion】In conclusion, application of organic manure, especially when in combination with balanced nitrogen, phosphorus and potassium fertilizers, is of great significance to improving soil physico-chemical properties, expanding the fractions of organic carbon, and promoting balanced distribution of newly-sequestrated carbon in various carbon fractions. The findings in the study may serve as a theoretical basis for rational fertilization in sandy loam fluvo-aquic soils.
Key words:  Soil organic carbon fraction  Combination of chemical and organic fertilizers  Balanced fertilization  Fluvo-aquic soil