| 摘要: |
| 【目的】为探索添加木本泥炭等有机物料对新垦耕地土壤有机碳组分的影响,从而更好的理解农田土壤有机碳的固持机制,提升新垦耕地耕层土壤质量,快速高效合理培肥提供科学依据。【方法】本试验依托山西省利用木本泥炭快速构建优质耕作层试点项目研究不施肥处理(CK),常规施肥+腐熟秸秆 (DZ),木本泥炭+腐熟秸秆+生物激活激发剂+常规施肥 (MT) 和长期常规施肥(DB,为研究区周边高产农田)4种配施措施下土壤总有机碳 (TOC)、微生物生物量碳 (MBC)、易氧化有机碳(EOC)、水溶性有机碳 (WSOC)、轻组有机碳(LFOC)及重组有机碳 (HFOC) 含量。【结果】结果表明：(1) MT处理显著降低了土壤PH,且添加木本泥炭等有机物料处理中土壤肥力均有不同程度的提高；(2)MT处理下的土壤有机碳组分含量较CK均有不同程度的增加, TOC、MBC、LFOC及HFOC含量与DZ处理下的组分含量呈极显著差异性；(3)土壤有机碳各组分间关系密切,全氮、全磷、全钾和碱解氮与土壤有机碳各组分呈极显著相关关系。【结论】综合来看,木本泥炭等有机物料的添加不仅可以改善土壤理化性质而且可以快速提升SOC水平,所以木本泥炭+腐熟秸秆+生物激活激发剂+常规施肥是改善贫瘠土壤、快速培肥地力的最佳模式。 |
| 关键词: 木本泥炭、土壤理化性质、土壤有机碳、活性有机碳、轻重组有机碳 |
| DOI： |
| 分类号:S146 |
| 基金项目:(51304130)山西省青年科技研究(2015021125)；山西省教育厅哲学社会科学项目(201803010)；山西省科技厅软科学项目(2018041060—2)；山西农业大学(20132—13)第一作者：徐赛亚(1994—),女,在读,硕士研究生,研究方向：土地生态、资源环境评价。E-mail1293741497@qq.com。*通信作者：徐占军(1983—),男,博士,教授。研究方向：土地生态信息监测与评价、矿区土地低碳复垦整治。E-mailhexurenye0000@126.com , Xu Zhanjun1,* |
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| Effects of adding woody peat modifier on the soil organic carbon components of newly cultivated land |
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Xu Saiya, Xu Zhanjun
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Shanxi Agricultural University
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| Abstract: |
| 【Objective】In order to explore the changes of organic carbon components of newly cultivated land by adding woody peat and other organic materials, so as to better understand the retention mechanism of farmland soil organic carbon, improve the quality of the newly cultivated land soil layer, and provide fast, efficient and reasonable fertilizer Scientific basis.【Method】 This experiment relied on Shanxi Province to use woody peat to quickly build a high-quality farming layer pilot project to study no fertilization treatment (CK), conventional fertilization + decomposed straw (DZ), woody peat + decomposed straw + bioactivator + conventional fertilizer (MT) And long-term conventional fertilization (DB, which is a high-yield farmland around the study area) under four combined application measures total soil organic carbon (TOC), microbial biomass carbon (MBC), easily oxidized organic carbon (EOC), water-soluble organic carbon (WSOC ), Light group organic carbon (LFOC) and recombinant organic carbon (HFOC) content. 【Result】The results showed that: (1) MT treatment significantly reduced the soil pH, and the soil fertility was increased to varying degrees in the addition of woody peat and other organic materials; (2) The content of soil organic carbon components under MT treatment has increased to varying degrees compared to CK, and the contents of TOC, MBC, LFOC and HFOC are significantly different from those under DZ treatment; (3) There is a close relationship between the components of soil organic carbon, and total nitrogen, total phosphorus, total potassium, and alkali-decomposed nitrogen have a very significant correlation with each component of soil organic carbon. 【Conclusion】Taken together, the addition of organic materials such as woody peat can not only improve the physical and chemical properties of the soil but also quickly increase the SOC level, Therefore, woody peat + decomposed straw + bio-activator + conventional fertilization is the best mode to improve poor fertility and fertility. |
| Key words: Woody;peat, Soil;physical and;chemical properties, Soil;organic carbon, Activated;organic carbon, Light;and heavy;organic carbon |
