| 采煤塌陷区复垦土壤团聚体碳氮分布对施肥的响应 |
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| 引用本文： | 何冰,李廷亮,栗丽,高继伟,焦欢,李彦,李顺.采煤塌陷区复垦土壤团聚体碳氮分布对施肥的响应[J].水土保持学报,2018,32(4):184-189,196. |
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| 作者姓名： | 何冰 李廷亮 栗丽 高继伟 焦欢 李彦 李顺 |
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| 作者单位： | 山西农业大学资源与环境学院;山西农业大学农业资源与环境国家级实验教学示范中心 |
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| 基金项目： | 国家自然科学基金项目（41401342） |
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| 摘 要： | 为了揭示长期不同培肥措施下采煤塌陷区复垦土壤团聚体有机碳氮含量的变化规律,通过干筛法研究了不施肥(CK)、单施有机肥(M)、单施化肥(CF)、有机肥与化肥配施(MCF)、生物有机肥与化肥配施(MCFB)5种培肥措施下复垦4年和8年土壤各粒级团聚体分布组成特征以及各团聚体有机碳氮含量的变化规律。结果表明,复垦土壤团聚体含量随粒级减小呈先减小后增大的变化趋势,其中以3~2mm粒级团聚体含量最低,占团聚体总量2%~3%,以2~1mm粒级团聚体含量最高,占团聚体总量25%~31%。不同培肥措施下复垦4年和8年土壤团聚体分布特征无明显差异,但较未复垦生土明显降低了7mm和7~5mm团聚体含量。复垦8年土壤的平均重量直径(MWD)、几何平均直径(GMD)高于复垦4年土壤,分形维数(D)值低于复垦4年土壤。各培肥处理间以单施有机肥MWD、GMD值最高,D值最低。各培肥处理土壤团聚体有机碳氮含量随粒径减小递增,以0.5~0.25mm粒径团聚体最高,而有机碳储量以2~1mm粒级团聚体最高,分别占24.2%~33.8%和17.0%~33.1%。各处理间有机碳氮含量以单施有机肥处理最高,但不同处理间有机碳氮储量无显著差异。总体表明,采煤塌陷区复垦4年和8年土壤团聚体分布特征及碳氮储量无明显变化,单施有机肥可提高复垦土壤团聚体有机碳氮含量及团聚体稳定性。
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| 关 键 词： | 复垦土壤 团聚体 有机碳 全氮 |
| 收稿时间： | 2018/3/18 0:00:00 |
Response of Carbon and Nitrogen Distribution of Reclaimed Soil Aggregates to Fertilizers in Coal Mining Subsidence Area |
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| HE Bing,LI Tingliang,LI Li,GAO Jiwei,JIAO Huan,LI Yan,LI Shun.Response of Carbon and Nitrogen Distribution of Reclaimed Soil Aggregates to Fertilizers in Coal Mining Subsidence Area[J].Journal of Soil and Water Conservation,2018,32(4):184-189,196. |
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| Authors: | HE Bing LI Tingliang LI Li GAO Jiwei JIAO Huan LI Yan LI Shun |
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| Institution: | 1. Collge of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801;2. National Experimental Teaching Demonstration Center of Agricultural Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801 |
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| Abstract: | In order to reveal the changes of organic carbon and nitrogen content of reclaimed soil aggregates in coal mining subsidence areas under long-term fertilization measures, we examined the characteristics of soil aggregates distribution and the changes of organic carbon and nitrogen contents in 4 years and 8 years of reclamation soil under five fertilization measures, which were non-fertilizer (CK), single application of manure fertilizer (M), single application of chemical fertilizer (CF), manure fertilizer and chemical fertilizer (MCF), biological organic fertilizer and chemical fertilizer mixed fertilizer (MCFB). The results showed that the content of reclaimed soil aggregates first decreased and then increased with the decreasing of grain size, in which the content of aggregates with the size of 3~2 mm was the lowest, accounting for 2%~3% of the total aggregates, and the content of aggregates with the size of 2~1 mm was the highest, accounting for 25%~31%. There was no significant difference in the distribution characteristics of soil aggregates between the 4 years and 8 years of reclaimation under different fertilization measures, but the contents of 7~5 mm and >7 mm aggregates significantly decreased compared with unreclaimed raw soil. The mean weight diameter (MWD) and geometric mean diameter (GMD) of the 8 years reclaimation soil were both higher than those of 4 years, while the fractal dimension (D) value was lower than that of 4 years. The MWD and GMD values of M treatment were the highest, but the D of it was the lowest. The contents of organic carbon and nitrogen in soil aggregates increased with the decreasing of soil aggregate size in reclaimed soil. The aggregates with the size of 0.5~0.25 mm were the highest, while the organic carbon and nitrogen storages in the aggregates with the size of 2~1 mm were the highest, accounting for 24.2%~33.8% and 17.0%~33.1%, respectively. Organic carbon and nitrogen contents were the highest in M treatment, but there was no significant difference in the storages of organic carbon and nitrogen between different treatments. Thus, there was no significant change in the distribution characteristics of soil aggregates and carbon and nitrogen reserves in the 4 years and 8 years reclaimed lands of coal mining subsidence area. The application of manure fertilizer could increase the organic carbon and nitrogen content and the stability of the reclaimed soil aggregates. |
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| Keywords: | reclaimed soil aggregates organic carbon total nitrogen |
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