Effects of Biochar and Straw on Soil N2O Emission from a Wheat Maize Rotation System

被引：2
|
作者：
Tang Z.-M. [1 ]
Liu X.-R. [1 ]
Zhang Q.-W. [1 ]
Li G.-C. [1 ]
机构：
[1] Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing
来源：
Huanjing Kexue/Environmental Science | 2021年 / 42卷 / 03期
关键词：
Biochar; Microbial biomass carbon(MBC); Microbial biomass nitrogen(MBN); NH[!sub]4[!/sub][!sup]+[!/sup]-N; NO[!sub]3[!/sub][!sup]-[!/sup]-N; Straw;
D O I：
10.13227/j.hjkx.202008186
中图分类号：
学科分类号：
摘要：
The effects of biochar and straw return on soil N2O emissions were studied in the winter wheat-summer maize rotation system of intensively farmed land in North China to provide a theoretical basis for N2O emission reduction and the efficient straw utilization. The experiment included the following four treatments: ① Control (CK); ② Biochar application at a rate of 9.0 t•(hm2•a)-1 (C); ③ Straw return (SR); and ④ Straw return plus biochar application at a rate of 9.0 t•(hm2•a)-1 (C+SR). The results showed that in the wheat season, the CK treatment showed a slight decrease in soil N2O emission while the SR and C+SR treatments promoted soil N2O emission by 47.4% and 71.8%, respectively. In the maize-growing season, the CK treatment reduced soil N2O emission by 29.8% while the SR and C+SR treatments increased soil N2O emission by 13.4% and 35.8%, respectively. During the wheat-growing season, the soil water, NH4+-N, and MBN content were the main environmental factors affecting N2O emissions; during the maize-growing season, NO3--N, NH4+-N, and MBC content were the main environmental factors affecting emissions. Based on our results, the application of biochar to cropland is an effective option for mitigating greenhouse gas emissions, whereas direct straw return to fields might not be an effective strategy. More research is now needed to examine the effect of the return of straw of different maturity on N2O emissions. © 2021, Science Press. All right reserved.
引用
收藏
页码：1569 / 1580
页数：11
相关论文
共 48 条
  • [1] Li Y, Ju X T., Rational nitrogen application is the key to mitigate agricultural nitrous oxide emission, Journal of Agro-Environment Science, 39, 4, pp. 842-851, (2020)
  • [2] Tian H Q, Yang J, Xu R T, Et al., Global soil nitrous oxide emissions since the preindustrial era estimated by an ensemble of terrestrial biosphere models: magnitude, attribution, and uncertainty, Global Change Biology, 25, 2, pp. 640-659, (2019)
  • [3] Zhang A F, Liu Y M, Pan G X, Et al., Effect of biochar amendment on maize yield and greenhouse gas emissions from a soil organic carbon poor calcareous loamy soil from Central China Plain, Plant and Soil, 351, 1-2, pp. 263-275, (2012)
  • [4] Ribas A, Mattana S, Llurba R, Et al., Biochar application and summer temperatures reduce N<sub>2</sub>O and enhance CH<sub>4</sub> emissions in a mediterranean agroecosystem: role of biologically-induced anoxic microsites, Science of the Total Environment, 685, pp. 1075-1086, (2019)
  • [5] Shi Y L, Liu X R, Gao P L, Et al., Effects of biochar and organic fertilizer on saline-alkali soil N<sub>2</sub>O emission in the North China Plain, Environmental Science, 38, 12, pp. 5333-5343, (2017)
  • [6] Krause H M, Huppi R, Leifeld J, Et al., Biochar affects community composition of nitrous oxide reducers in a field experiment, Soil Biology and Biochemistry, 119, pp. 143-151, (2018)
  • [7] Song Y Z, Li Y F, Cai Y J, Et al., Biochar decreases soil N<sub>2</sub>O emissions in moso bamboo plantations through decreasing labile N concentrations, N-cycling enzyme activities and nitrification/denitrification rates, Geoderma, 348, pp. 135-145, (2019)
  • [8] Wang Y S, Liu Y S, Liu R L, Et al., Biochar amendment reduces paddy soil nitrogen leaching but increases net global warming potential in Ningxia irrigation, China[J], Scientific Reports, 7, 1, (2017)
  • [9] Pereira E I P, Lechot J, Conz R F, Et al., Biochar enhances nitrous oxide reduction in acidic but not in near-neutral pH soil[J], Soil Systems, 3, 4, (2019)
  • [10] Liu X R, Zhang X, Zhang Q W, Et al., Effects of biochar and straw return on CO<sub>2</sub>and N<sub>2</sub>O emissions from farmland in the North China Plain, Acta Ecologica Sinica, 37, 20, pp. 6700-6711, (2017)
12345