Effects of Biochar Combined with Subsoiling on Soil Aggregates and Organic Carbon

Zhang Yumeng; Guo Yanjie; Zhang Lijuan; Liu Ting; Ji Yanzhi

doi:10.13961/j.cnki.stbctb.20220523.001

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Effects of Biochar Combined with Subsoiling on Soil Aggregates and Organic Carbon

- Effects of Biochar Combined with Subsoiling on Soil Aggregates and Organic Carbon
- Bulletin of Soiland Water Conservation Vol. 42, Issue 5, Pages: 368-375(2022)
- 作者机构：
  
  1. 河北农业大学资源与环境科学学院,河北,保定,071000
  2. 河北农业大学邸洪杰土壤与环境实验室,河北,保定,071000
  3. 河北省农田生态环境重点实验室,河北,保定,071000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.20220523.001
  CLC： S158.3
- Published：2022
- 稿件说明：
移动端阅览
Zhang Yumeng, Guo Yanjie, Zhang Lijuan, et al. Effects of Biochar Combined with Subsoiling on Soil Aggregates and Organic Carbon[J]. Bulletin of Soiland Water Conservation, 2022, 42(5): 368-375.
DOI：

Zhang Yumeng, Guo Yanjie, Zhang Lijuan, et al. Effects of Biochar Combined with Subsoiling on Soil Aggregates and Organic Carbon[J]. Bulletin of Soiland Water Conservation, 2022, 42(5): 368-375. DOI： 10.13961/j.cnki.stbctb.20220523.001.

摘要

[目的

]

分析施加生物炭配合深松对农田耕层土壤容重、土壤结构稳定性及有机碳的影响，为土壤结构改良提供科学合理的调控措施和理论依据。[方法

]

基于冬小麦—夏玉米轮作体系，2017—2019年大田试验期间，在小麦季设置生物炭施用量分别为0，3 000，6 000 kg/hm

，B

和B

)的3个处理，在玉米季设置传统贴茬播种(P)和深松耕作播种(S)2个耕作处理，共计B

P，B

S，B

S 6个处理。[结果

]

①两个轮作后，相同耕作方式下，土壤容重随生物炭用量的增加而降低，其中B

S较B

S显著降低(13.59%)；同一施炭水平下，各处理土壤容重呈现出深松＜传统的特征，深松容重整体较传统低4.95%。②连续施加生物炭配合深松耕作两年后，B

S处理下的有机碳含量达到最高，比B

P显著增加(42.15%)，比B

P增加1.03%。③两个轮作后，随生物炭用量的增加机械性团聚体含量(DR

0.25

)、水稳性团聚体含量(WR

0.25

)、平均重量直径(MWD)呈上升趋势，相反土壤团聚体破坏率(PAD)及土壤不稳定团粒指数(ELT)呈逐渐下降趋势，且表现为B

S处理均优于其他各处理的特征，表明高添加量生物炭配合深松耕作较传统耕作能更有效地提高团聚体稳定性。[结论

]

小麦季基施6 000 kg/hm

生物炭并配合玉米季深松有利于提高土壤团聚体稳定性，改善华北平原农田土壤结构。

Abstract

[Objective] The effects of applying biochar combined with subsoiling on soil bulk density

soil structure stability

and organic carbon in farmland topsoil were comprehensively analyzed to provide scientific and reasonable control measures and a theoretical basis for soil structure improvement. [Methods] A field experiment was conducted from 2017 to 2019 based on a winter wheat and summer corn rotation system. Biochar was applied at rates of 0

3 000

and 6 000 kg/hm2 (B0

and B2) during the wheat season in conjunction with two tillage treatments 〔traditional stubble sowing (P) and subsoiling tillage sowing (S)〕 imposed during the corn season to produce a total of six combined treatments of B0P

B1P

B2P

B0S

B1S

and B2S. [Results] ① After two crop rotations

under the same tillage method

soil bulk density decreased with increasing biochar application rate

and bulk density under B2S was significantly lower than under B0S by 13.59%. Under the same biochar application level

soil bulk density under subsoiling was less than under traditional stubble sowing

and the subsoiling bulk density was 4.95% lower than the bulk density under traditional stubble sowing; ② After two years of continuous application of biochar combined with subsoiling tillage

the organic carbon content of B2S was the highest

and was 42.15% greater than observed for B0P and 1.03% greater than observed for B2P; ③ After two crop rotations

the mechanical aggregate content (DR0.25)

the water-stable aggregate content (WR0.25)

and the mean weight diameter (MWD) showed an upward trend with increasing biochar application rate. In contrast

soil aggregate destruction rate (PAD) and soil unstable aggregate index (ELT) showed a decreasing trend

and B2S produced better results than the other treatments

indicating that high biochar application rates combined with subsoiling tillage more effectively improved aggregate stability than traditional tillage. [Conclusion] A basic application of 6 000 kg/hm2 of biochar during the wheat season combined with corn season subsoiling could improve the stability of soil aggregates and the soil structure of farmland in the North China Plain.

关键词

Keywords

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