| 陆太伟,蔡岸冬,徐明岗,高强,孙楠,张文菊.施用有机肥提升不同土壤团聚体有机碳含量的差异性[J].农业环境科学学报,2018,37(10):2183-2193. |
| 施用有机肥提升不同土壤团聚体有机碳含量的差异性 |
| Variation in sequestration of organic carbon associated with differently sized aggregates after organic manure application |
| 投稿时间：2017-12-28 |
| DOI：10.11654/jaes.2017-1767 |
| 中文关键词: 施肥 团聚体有机碳 耕地类型 土壤质地 整合分析法 |
| 英文关键词: fertilizer aggregate-associated organic carbon farmland uses soil texture meta-analysis |
| 基金项目:国家自然科学基金项目（41501334，41620104006）；国家重点研发计划（2016YFE0112700） |
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| 中文摘要: |
| 基于收集已发表文献数据，建立具备相同有机碳分组方法（湿筛法）、相对独立的43篇文献的319组成对数据，利用Meta整合分析法研究不同耕地类型、种植制度及土壤质地条件下施肥对各粒径团聚体（>2、2~0.25、0.25~0.053、<0.053 mm）有机碳含量的影响程度。结果表明：与不施肥相比，施用有机肥和化肥均显著提升了土壤总有机碳（TSOC）及>2、2~0.25、0.25~0.053 mm粒径团聚体有机碳含量，有机肥对总有机碳的提升幅度（38.0%）是化肥（8.8%）的4.3倍，而对各级团聚体有机碳的提升幅度（39.7%~72.3%）是化肥（4.3%~15.8%）的4.6~9.2倍（P<0.05）。对于<0.053 mm团聚体有机碳而言，施用化肥无影响，但有机肥能显著提升其有机碳含量。在同一条件不同粒径下，与不施肥相比，一年两熟、旱地、砂土及黏土下施用有机肥对2~0.25 mm粒径团聚体有机碳含量的提升幅度显著高于其他粒径。在同一粒径不同条件下，与不施肥相比，施用有机肥对不同粒径团聚体有机碳含量的提升幅度（P<0.05）存在显著差异，分别为2~0.25 mm：砂土>壤土、黏土；旱地 > 水田、水旱轮作；0.25~0.053 mm和<0.053 mm：一年一熟 > 一年两熟；旱地 > 水田、水旱轮作。施用化肥与施用有机肥结果类似，但差异不显著。施用化肥显著降低了水田中<0.053 mm粒径团聚体有机碳含量，降低幅度为16.4%。>0.25和<0.25 mm粒径团聚体有机碳含量均与TSOC呈极显著正相关关系，TSOC每增加1.00 g·kg-1时，>0.25 mm粒径团聚体有机碳含量的增加幅度（0.61 g·kg-1）要高于<0.25 mm粒径（0.23 g·kg-1）。可见，施用有机肥有利于农田土壤团聚体有机碳的累积，尤其是大团聚体（>0.25 mm），而不同条件下，尤其在旱地及质地较轻的砂土中，对土壤团聚体有机碳含量的累积更应该考虑有机肥的投入。 |
| 英文摘要: |
| A data set on soil organic carbon (SOC) was set up based on 319 pairs of data collected using the same soil organic carbon fractionation method (the wet sieving method) and presented in 43 published papers. We conducted a meta-analysis to quantify the response of different fractions of organic carbon associated with >2, 2~0.25, 0.25~0.053, and <0.053 mm aggregates (Agg-OC) to manure (Org-M) or chemical fertilizer (Min-F) application compared to that without fertilizer (Non-F) application under different cropping system, farmland type, and soil texture conditions. Results showed that SOC in bulk soil and Agg-OC in the >2, 2~0.25, and 0.25~0.053 mm aggregates were significantly increased by both Org-M and Min-F compared to by Non-F. As for total SOC (TSOC), compared to Non-F, the improvement rate of Org-M over Non-F (38.0%) was 4.3 times higher than that of Min-F over Non-F (8.8%). As for the Agg-OC in different aggregates, the improvement rate of Org-M over Non-F (39.7%~72.3%) was 4.6~9.2 times higher (P<0.05) than that of Min-F over Non-F (4.3%~15.8%), respectively. There was no significant effect of Min-F on the <0.053 mm Agg-OC, whereas the effect of Org-M was significant. As for different size aggregates under the same conditions, compared with Non-F, the increase in applying Org-M on the 2~0.25 mm Agg-OC was significantly higher than those in the >2, 0.25~0.053, and <0.053 mm aggregates for double-cropping, upland, sandy, and clay conditions. In the same-sized particles under different conditions, compared to Non-F, Agg-OC was significantly increased by Org-M application. The orders of the increment were as follows:sandy > loam, clay, upland > paddy, paddy-upland for 2~0.25 mm; monocropping > double-cropping, upland > paddy, paddy-upland for both 0.25~0.053 and <0.053 mm. The effect of Min-F over Non-F on Agg-OC was similar to that of Org-M application, with no significant difference between them. Moreover, Min-F markedly decreased the <0.053 mm AggOC by 16.4% compared to Non-F in paddy. There was significant positive correlation between >0.25 and <0.25 mm Agg-OC and TSOC. An increase of 1.00 g·kg-1 in TSOC resulted in a 0.61 g·kg-1 increase in >0.25 mm Agg-OC, which was higher than that of <0.25 mm Agg-OC (0.23 g·kg-1). In conclusion, manure application benefits accumulation of soil aggregate-associated organic carbon, especially in >0.25 mm aggregates. Manure application is recommended for soil carbon sequestration in aggregates, especially for upland and light texture soil. |
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