LI Wei-qun,ZHANG Jiu-ming,CHI Feng-qin,et al.Effects of Different Straw Returning Methods on Soil Aggregate and Organic Carbon Content[J].HEILONGJIANG AGRICULTURAL SCIENCES,2019,(05):27-30.[doi:10.11942/j.issn1002-2767.2019.05.0027]
秸秆不同还田方式对土壤团聚体及有机碳含量的影响
- Title:
- Effects of Different Straw Returning Methods on Soil Aggregate and Organic Carbon Content
- Keywords:
- straw returning; soil aggregates; soil structure; soil organic carbon
- 文献标志码:
- A
- 摘要:
- 为提高玉米秸秆综合利用率,本文采用小区试验方法,研究连续5年不同秸秆还田方式对土壤化学性质、土壤团聚体比例及有机碳含量和玉米产量的影响。结果表明:秸秆连续还田后较对照明显增加土壤有机质含量和土壤pH。秸秆还田处理较对照增加土壤>2.00 mm和0.25~2.00 mm团聚体粒级含量,其中秸秆全量还田处理的>2.00 mm粒级团聚体比例较对照提高38.0%;秸秆全量还田除<0.053 mm土壤团聚体有机碳含量均较对照降低,其余均增加;秸秆1/2还田可以有效增加土壤大团聚体粒级含量(>0.25 mm),提高>0.053 mm粒级团聚体中有机碳含量,明显提高玉米产量。由此可知,秸秆还田后有效改善土壤结构,增强通气与保水能力,提高土壤团聚体的稳定性,并增加土壤有机碳含量和改善土壤团聚体结构,并提高作物产量。
- Abstract:
- In order to improve the comprehensive utilization rate of corn straw,in this paper,plot experiment method was used to study the effects of different straw returning methods on soil chemical properties,soil aggregate ratio,organic carbon content and maize yield for five consecutive years.The results showed that after continuous straw returning,soil organic matter content and soil pH were significantly increased compared with the control.The straw returning treatment made the soil have higher content of aggregate in grain size of >2.000 mm and 0.250-2.000 mm of soil compared with the control,and the proportion of aggregate in >2.000 mm with the total straw mulching treatment was increased by 38.0% compared with the control.The organic carbon content of soil aggregates in <0.053 mm was lower than that of the control in total straw mulching,and the rest was higher.Straw 1/2 returning to the field can effectively increase the grain size content of soil large aggregate (>0.250 mm),increase the organic carbon content of aggregate in grain size of >0.053 mm,and significantly increase the yield of corn.Therefore,straw mulching can effectively improve soil structure,enhance ventilation and water retention capacity,improve the stability of soil aggregates,increase soil organic carbon content and improve soil aggregates structure,and improve crop yield.
参考文献/References:
[1]Barthes B,Roose E.Aggregate stability as an indicator of soil susceptibility to runoff and erosion validation atseveral levels[J].Catena,2002,47:133-149.
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备注/Memo
收稿日期:2018-12-07