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浙江大学学报(农业与生命科学版)  2022, Vol. 48 Issue (4): 483-492    DOI: 10.3785/j.issn.1008-9209.2021.06.291
资源利用与环境保护     
沙棘果渣还田对水稻土性质、温室气体排放和微生物数量的影响
万清1(),杨小渔1,吴丹2,张奇春1()
1.浙江大学环境与资源学院, 污染环境修复与生态健康教育部重点实验室, 杭州 310058
2.浙江大学生物系统工程与食品科学学院, 杭州 310058
Effects of returning seabuckthorn fruit residue into field on paddy soil properties, greenhouse gas emissions and microbial numbers
Qing WAN1(),Xiaoyu YANG1,Dan WU2,Qichun ZHANG1()
1.Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
2.College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
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摘要:

采用28 d的土壤培养试验,选用沙棘果渣(R)、生物质炭(B)和生物陶粒(T)3组材料,以自然培养组作为对照(CK),探讨沙棘果渣对土壤理化性质、温室气体(CO2、CH4和N2O)排放和微生物数量等方面的影响。结果表明:沙棘果渣能够显著提升土壤中全碳、全氮、速效钾等养分的含量,平均提升率分别为16.31%、14.99%、46.15%;对土壤pH也存在一定的提升效果,提升范围为0.25~0.69。沙棘果渣还田后土壤微生物丰度显著升高,其中前14 d微生物数量较对照平均增长335.6%。对不同材料还田后的温室气体排放和全球增温潜势分析表明,与生物质炭和生物陶粒相比,沙棘果渣还田的CO2排放量和全球增温潜势显著较高,但其CH4排放量较小且可以显著降低N2O的排放量。总体来看,沙棘果渣具有较高的还田价值,但需要考虑对温室气体排放的风险,本研究可为沙棘果渣的农业还田利用提供一定参考。

关键词: 沙棘果渣生物质炭生物陶粒微生物数量温室气体土壤理化性质    
Abstract:

To explore the effects of seabuckthorn fruit residue on soil physicochemical properties, greenhouse gas (CO2, CH4, N2O) emissions, and the microbial numbers, a 28-day soil pot experiment was conducted. Three groups of materials were used, including seabuckthorn fruit residue (R), biochar (B), and biological ceramsite (T) in the experiment, and a natural culture was used as the control group (CK). The results showed that the seabuckthorn fruit residue significantly promoted the contents of soil nutrients such as total carbon, total nitrogen, and available potassium, and the average increase rates were 16.31%, 14.99%, and 46.15%, respectively. Besides, the soil pH was also enhanced from 0.25 to 0.69. The microbial numbers in the soils treated with seabuckthorn fruit residue were promoted significantly. The average growth rate of microorganisms in the first 14 days was 335.6% higher than that of the control. The CO2 emissions and global warming potential (GWP) with the treatment of seabuckthorn fruit residue were higher of biochar (R) treatment, while the CH4 and N2O emissions were both lower than those of biochar (B) and biological ceramsite (T) treatments. In general, the seabuckthorn fruit residue showed relatively high returning value, but its risk of greenhouse gas emission should also be considered. This study can provide some references for the practice of returning seabuckthorn fruit residue into the field.

Key words: seabuckthorn fruit residue    biochar    biological ceramsite    microbial numbers    greenhouse gases    soil physicochemical properties
收稿日期: 2021-06-29 出版日期: 2022-09-03
CLC:  X 172  
基金资助: 国家重点研发计划课题(2021YFD1700803);浙江省重点研发计划项目(2021C04032)
通讯作者: 张奇春     E-mail: 3170100475@zju.edu.cn;qczhang@zju.edu.cn
作者简介: 万清(https://orcid.org/0000-0001-9867-7156),E-mail:3170100475@zju.edu.cn
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引用本文:

万清,杨小渔,吴丹,张奇春. 沙棘果渣还田对水稻土性质、温室气体排放和微生物数量的影响[J]. 浙江大学学报(农业与生命科学版), 2022, 48(4): 483-492.

Qing WAN,Xiaoyu YANG,Dan WU,Qichun ZHANG. Effects of returning seabuckthorn fruit residue into field on paddy soil properties, greenhouse gas emissions and microbial numbers. Journal of Zhejiang University (Agriculture and Life Sciences), 2022, 48(4): 483-492.

链接本文:

https://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2021.06.291        https://www.zjujournals.com/agr/CN/Y2022/V48/I4/483

类型

Type

pHw(全碳) Total C content/(g/kg)w(全氮) Total N content/(g/kg)

w(硝态氮)

NO3-N

content/(mg/kg)

w(铵态氮)

NH4+-N content/(mg/kg)

w(有效磷)

Available P content/(mg/kg)

w(速效钾) Available K content/(mg/kg)w(DOC)/(g/kg)w(DON)/(g/kg)

水稻土

Paddy soil

5.369.580.9337.856.496.82102.580.060.03
表1  试验土壤基本理化性质

材料

Material

w(全氮)

Total N content/%

w(全碳)

Total C content/%

碳氮比

C/N ratio

w(全氢)

Total H content/%

w(全硫)

Total S content/%

珍珠岩

Pearlite

0.130.211.570.140.01

沙棘果渣

Seabuckthorn fruit residue

1.2553.4842.795.270.05

生物质炭

Biochar

1.6235.0521.692.520.02

生物陶粒

Biological ceramsite

0.054.5595.100.842.01
表2  所用材料的主要性质
图1  不同处理对土壤全碳、全氮和碳氮比的影响R:沙棘果渣处理;B:生物质炭处理;T:生物陶粒处理;CK:空白对照。图内不同小写字母表示同一培养时间、不同处理间在P<0.05水平差异有统计学意义。下同。
图2  不同处理对土壤DOC、DON、硝态氮和铵态氮的影响
图3  不同处理对土壤pH的影响
图4  不同处理对土壤有效磷、速效钾、全氢和全硫的影响
图5  不同处理对土壤CO2 、CH4 和N2O排放速率和累积排放量的影响柱状图上方的不同小写字母表示不同处理间在P<0.05水平差异有统计学意义,下同。
图6  不同处理对全球增温潜势的影响
图7  不同处理对土壤微生物数量的影响
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