华北平原潮质土壤协同实现有机碳提升,粮食增产稳产的途径——以曲周县为例
作者:
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(中国农业大学资源与环境学院/国家农业绿色发展研究院/植物-土壤相互作用教育部重点实验室,北京 100193)

作者简介:

任其然(1993-),男,贵州贵阳人,硕士研究生,主要从事农田土壤碳循环研究。E-mail:549794940@qq.com。

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基金项目:

基金项目:供磷强度对玉米根系生长空间的补偿机制(21027116)。


Approaches to the organic carbon enhancement and grain yield stability in north China plain based on the coordi-nation of tidal soils:A case study of Quzhou County
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(College of Resources and Environmental Sciences;National Academy of Agriculture Green Development;Key Laboratory of Plant-Soil Interactions,Ministry of Education,China Agricultural University,Beijing 100193)

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    摘要:

    土壤有机碳(SOC)的提升和持续的粮食增产和稳产是当前农业可持续发展所面临的重大挑战之一。然而,在农业生产系统中,协调SOC提升,粮食增产及稳产的机制尚不明确。通过收集不同历史时期(1980s、1990s、2000s和2010s)曲周县粮食产量、土壤有机质含量、有机肥施用量等数据,以及对曲周若干个田间定位试验的整合,分析不同时期曲周县的碳投入量和作物产量差异。主要研究结果如下:(1)曲周县作物产量和土壤有机质含量在空间上呈显著区域特征,临近县城范围内作物产量和土壤有机质含量明显较高;(2)从1980s到2010s曲周县粮食产量从2.9 t·hm-2提高到7.7 t·hm-2,产量变异系数从22.9%降低到3.3%,土壤有机质含量从8.5 g·kg-1提高到13.8 g·kg-1,全县农田平均碳投入从1.4 t·hm-2提高到9.3 t·hm-2;(3)基于长期定位试验结果分析,与空白对照相比,优化处理的SOC显著提升,平均每年提高5.9%,粮食产量10年平均增加84.1%。同时变异系数降低了3.9%。通过秸秆还田、有机肥施用等优化管理措施可以提高SOC含量,促进粮食增产和稳产。随着产量增加,秸秆数量进一步提高,将更多的碳投入到土壤中。产生了地上-地下的良性循环,协同实现土壤有机质提升、作物增产及稳产。

    Abstract:

    The improvement of soil organic carbon (SOC)and continuous grain production and stable production are one of the major challenges facing the sustainable development of agriculture.However,in agricultural production systems,it is unclear how to coordinate the improvement of soil organic carbon,grain production and stable production.This paper collected the data of grain yield,soil organic matter content and organic fertilizer application in Quzhou County in different historical periods (1980s,1990s,2000s and 2010s),and the integration of several field experiments in Quzhou,the differences in carbon input and crop yields in Quzhou in different periods were analyzed.The main results are as follows:(1)The crop yield and soil organic matter content in Quzhou County showed significant regional characteristics in space,and the crop yield and soil organic matter content in the vicinity of the county were significantly higher;(2)From 1980s to 2010s,the grain yield of Quzhou County increased from 2.9 t·hm-2 to 7.7 t·hm-2,the coefficient of variation of yield decreased from 22.9% to 3.3%,and the soil organic matter content increased from 8.5 g·kg-1 to 13.8 g·kg-1.The county′s average carbon input increased from 1.4 t·hm-2 to 9.3 t·hm-2;(3)Based on the analysis of long-term positioning test results,the optimized soil organic carbon was significantly improved compared with the blank control,with an average annual increase of 5.9%.Production increased by an average of 84.1% over the decade.At the same time,the coefficient of variation was reduced by 3.9%.By optimizing management measures such as retuming straw to the field and applying organic fertilizer,soil organic carbon can be increased,grain production can be increased and production can be stabilized.In the process of increasing grain production,the crop will put more carbon into the soil.The benign circulation of above-ground and underground,and soil organic matter improvement,crop yield increase and stable production are synergistically realized.

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任其然,邓丽娟,焦小强.华北平原潮质土壤协同实现有机碳提升,粮食增产稳产的途径——以曲周县为例[J].中国土壤与肥料,2021,(1):310-318.

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  • 收稿日期:2019-11-29
  • 最后修改日期:
  • 录用日期:2020-01-08
  • 在线发布日期: 2021-03-18