Effects of Straw Returning and Biochar Application on Summer Maize Yield and Soil N2O Emission in Guanzhong Plain

被引：2

作者：

Bai J.-Z. ^{[1
,2
]}

Liu Z.-Y. ^{[1
,2
]}

Song J.-J. ^{[1
,2
]}

Li N. ^{[1
,2
]}

Yu Q. ^{[1
,2
]}

Hao J.-Q. ^{[1
,2
]}

Xu H.-W. ^{[1
,2
]}

Cheng B.-H. ^{[1
,2
]}

Wang X. ^{[1
,2
]}

Feng Y.-Z. ^{[1
,2
]}

机构：

[1] College of Agronomy, North A&F University, Yangling

[2] Research Center of Recycle Agricultural Engineering and Technology of Shaanxi Province, Yangling

[3] Shanxi Institute of Organic Dryland Farming, Shanxi Agricultural University, Taigu

来源：

Huanjing Kexue/Environmental Science | 2022年 / 43卷 / 08期

关键词：

biochar; nitrous oxide; residues; summer maize; yield;

D O I：

10.13227/j.hjkx.202112061

中图分类号：

学科分类号：

摘要：

Here, we investigated the effects of straw returning combined with biochar application on summer maize yield and soil nitrous oxide (N2O) emissions, based on a field location trial in the Guanzhong Plain from 2019 to 2020. The soil N2O emission rates were monitored using the static chamber-chromatography method. A comprehensive analysis of summer maize yields, soil N2O emissions, and soil labile nitrogen components was conducted to clarify the effects of straw returning combined with biochar application on improving soil fertility, increasing summer maize yield, and reducing greenhouse gas emissions. The three treatments were no straw returning (S0 ), straw returning (S), and straw returning combined with biochar application (SB). The results showed that the peak of N2O emissions from each treatment occurred 10 d after the straw return, and the rate of soil N2O emissions remained at a low level after 30 d of straw return. The rate of soil N2O emissions showed highly significant positive correlations (P <0.05) with ammonium nitrogen (NH4+ -N), inorganic nitrogen (SIN), microbial nitrogen (MBN), and dissolved organic nitrogen (DON) contents. S significantly increased summer maize yield, cumulative N2O emissions, yield-scaled N2O intensity, and total nitrogen (TN) content by 7.4%-13%, 65.8%-132.2%, 54.6%-103%, and 27.8%-33%, respectively, compared to those in S0 . Although the trend for SB to increase summer maize yield (2.5%-3.3%) compared to that in S was not significant (P >0.05), SB significantly reduced cumulative N2O emissions and yield-scaled N2O intensity by 24.0%-27.3% and 26. 4%-29.2%, respectively, compared to that in S. SB significantly reduced the rate of soil N2O emissions by 45.1%-69.6% at the peak of N2O emissions compared to that in S. Biochar application mitigated soil N2O emissions induced by straw return and had a peak-shaving effect. SB significantly increased soil total N by 9.1%-12.2% compared to that in S. Combining summer maize yield, soil N2O emissions, and TN content, SB not only improved soil fertility and summer maize yield but also reduced yield-scaled N2O intensity, making it a suitable management practice that can be replicated to balance crop yield and environmental friendliness. © 2022 Science Press. All rights reserved.

引用

页码：4379 / 4386

页数：7

共 33 条

[11] Guo L J, Zhang Z S, Wang D D, Et al., Effects of short-term conservation management practices on soil organic carbon fractions and microbial community composition under a rice-wheat rotation system, Biology and Fertility of Soils, 51, 1, pp. 65-75, (2015)
[12] Shang Z H, Cai H J, Chen H, Et al., Effect of water-fertilizer-gas coupling on soil N2O emission and yield in greenhouse tomato, Environmental Science, 41, 6, pp. 2924-2935, (2020)
[13] (2000)
[14] Zou J W, Huang Y, Lu Y Y, Et al., Direct emission factor for N2O from rice-winter wheat rotation systems in Southeast China, Atmospheric Environment, 39, 26, pp. 4755-4765, (2005)
[15] Zhang Z Y, Yu X H, Xiong S P, Et al., Effects of tillage methods and nitrogen fertilizer reduction on soil enzyme activities and greenhouse gas emissions of wheat yellow cinnamon soil, Journal of Agro-Environment Science, 39, 2, pp. 418-428, (2020)
[16] Mitchell D C, Castellano M J, Sawyer J E, Et al., Cover crop effects on nitrous oxide emissions: role of mineralizable carbon [J], Soil Science Society of America Journal, 77, 5, pp. 1765-1773, (2013)
[17] Chen Y, Shinogi Y, Taira M, Et al., Influence of biochar use on sugarcane growth, soil parameters, and groundwater quality, Australian Journal of Soil Research, 48, 7, pp. 526-530, (2010)
[18] Zhang J X., Changes of winter wheat yield and soil fertility under long-term straw management and nitrogen application, (2018)
[19] Liu X R, Ren J Q, Zhang Q W, Et al., Long-term effects of biochar addition and straw return on N2O fluxes and the related functional gene abundances under wheat-maize rotation system in the North China Plain, Applied Soil Ecology, 135, pp. 44-55, (2019)
[20] Ji L D, Liu X T, Si H L, Et al., Effects of biomass charcoal on soil physicochemical properties and corn growth, Agricultural Research in the Arid Areas, 39, 5, pp. 114-120, (2021)

← 1 2 3 4 →