| 摘要: |
| 摘要：【目的】研究两种煤基复混肥不同施肥量下对复垦区有机碳及碳库管理指数的影响，结果可为揭示不同煤基复混肥对复垦土壤有机碳库的作用机制提供科学依据。【方法】采用田间试验方法，以长治市襄垣县采煤塌陷区复垦四年的土壤为研究对象，研究了煤基复混肥I、煤基复混肥II分别在90 kg N/hm2、135 kg N/hm2、180 kg N/hm2、225 kg N/hm2 施肥量下对复垦土壤各形态有机碳量及碳库管理指数的影响。【结果】随着煤基复混肥I、煤基复混肥II施肥量的增加，复垦土壤总有机碳和各活性有机碳量显著增加（P<0.05），其中活性有机碳组分量表现为中活性有机碳>高活性有机碳，而且煤基复混肥II的效果要明显高于煤基复混肥I。煤基复混肥II处理与不施肥处理相比，土壤总有机碳、水溶性有机碳、微生物量碳、总活性有机碳的量分别提高13.94%～40.84%、76.44%～266.12%、77.98%～185.37%、31.45%～97.53%；与普通复混肥处理相比分别提高2.1%～22.96%、73.27%～101.22%、17.54%～88.46%、30.65%～45.19%。135 kg N/hm2的煤基复混肥II处理最有利于复垦土壤碳库管理指数的提高，与不施肥处理和普通复混肥处理分别提高306.12% 和125.31%。【结论】施肥量为135 kg N/hm2的煤基复混肥II对复垦土壤有机碳及碳库管理指数提升效果最好。 |
| 关键词: 煤基复混肥；复垦土壤；土壤总有机碳；活性有机碳；碳库管理指数 |
| DOI： |
| 分类号:S158.5 |
| 基金项目:山西省重点研发项目(201603D21110-5)及山西省晋中市科技重点研发计划(Y182012) |
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| Effects of different coal-derived compound fertilizers on soil organic carbon and carbon pool management index in reclaimed area |
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FAN Xiao-dong1, liubin2, hongjianping3
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1.College of Resources and Environment,Shanxi Agricultural University;2.Taiyuan Landscape Construction Quality Supervision Station Shanxi Academy of Forestry Sciences;3.College of Resources and Environment, Shanxi Agricultural University
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| Abstract: |
| Abstract: China is a developing country. For a long time, with the development of economy, the demand for mineral resources is increasing. Because of the exploitation of coal resources in China, many industrial and mining wastes are generated, such as weathered coal, coal slime and fly ash, etc. The accumulation of a large number of industrial and mining waste not only wastes land resources and pollutes the environment, but also utilization very little. But not only that, coal mining has led to the destruction of the soil structure in the area. Compared to long-term cultivation of the soil, the soil in coal mining area has some problems, such as poor structure, low fertility, poor degree of maturation, low quantity of microorganism and low soil quality. Therefore, efficient utilization of industrial and mining waste, make it to achieve agricultural resource utilization is the most important. And using the compound fertilizer developed from industrial and mining waste to restore the quality of reclaimed soil has become the current development direction.【Objective】The current study aimed to elucidate the effects of two kinds of coal-derived compound fertilizers with different fertilizing amounts on soil organic carbon and carbon pool management index in reclaimed area. The results can be of scientific value in revealing the effect and mechanism of different coal-derived compound fertilizers on organic carbon pool of reclaimed soil. 【Method】Field experiment was performed in a coal-mining subsidence area that has been under reclamation for four years in Xiangyuan County, Changzhi City, Shanxi Province.. Coal-derived compound fertilizer I and II with 4 different nitrogen fertilization levels (90 kg/hm2, 135 kg/hm2, 180 kg/hm2 and 225 kg/hm2) were set to study their effects on amounts of different organic carbon forms and carbon pool management index. 【Result】With the increase of fertilizing amounts of coal-derived compound fertilizer I and II, the contents of total organic carbon and active organic carbon in reclaimed soil were significantly increased.. For the active organic carbon, content of medium active fraction were higher than high active fraction. The promoting effect of coal-derived compound fertilizer II was significantly higher(P<0.05) than coal-derived compound fertilizer I. Compared with the no fertilizer treatment, coal-derived compound fertilizer II treatment showed higher contents of soil total organic carbon, water-soluble organic carbon, microbial biomass carbon and total active organic carbon with increments of 13.94%～40.84%, 76.44%～266.12%, 77.98%～185.37% and 31.45%～97.53% respectively, while compared with the ordinary compound fertilizer treatment, the increment was 2.1%～22.96%, 73.27%～101.22%, 17.54%～88.46% and 30.65%～45.19% respectively. Moreover, coal-derived compound fertilizer II with a fertilizing amount of 135kg/hm2 treatment was most beneficial to the improvement of soil carbon pool management index, which respectively increased by 306.12% and 125.31% compared with no fertilizer treatment and ordinary compound fertilizer treatment. 【Conclusion】The best fertilizing practice for the improvement of soil organic carbon and carbon pool management index in reclaimed soil was application of coal-derived compound fertilizer II with a nitrogen fertilization level of 135kg/hm2. |
| Key words: Coal-derived compound fertilizer; Reclaimed soil; Soil total organic carbon; Labile organic carbon; Carbon pool management index |
