Effects of biochar-based fertilizer addition on maize yield and greenhouse gas emission characteristicsChinese Full TextEnglish Full Text (MT)
YU Zhongpu;YANG Haopeng;JI Licheng;WEI Chengcheng;JIANG Fei;LI Maosen;LI Xiaoliang;LI Feiyue;College of Resources and Environment, Anhui Science and Technology University;Henan Biochar Engineering Technology Development Center;
Abstract: 【Objective】This thesis investigates the effect of fertilizer reduction with biochar-based fertilizer on maize yield and soil greenhouse gas emission characteristics through maize field experiments. 【Methods】A total of six treatments were set in the experiment, namely, no chemical fertilizer（CK）, single chemical fertilizer（UF）, single biochar-based fertilizer（BCF）, and biochar-based fertilizer combined with different proportions of chemical fertilizer（three proportions, namely 60%, 80% and 100%, denoted as BCF60, BCF80 and BCF100, respectively）. 【Results】The cumulative emission of CH4-C during maize growth period was BCF100=BCF80 = BCF ＞ UF = CK ＞ BCF60. Among them, BCF, BCF80 and BCF100 emissions were the highest and the same, which increased by 5% compared with UF. The cumulative emission of N2O-N in BCF60 treatment was the highest, which increased by 4% compared with UF. While, the emission reduction effect of BCF and BCF80 treatments was obvious, which respectively decreased by 17% and 15% compared with UF. The cumulative CO2-C emissions of BCF60 treatment was the highest and increased by 1% compared with UF, while the cumulative emissions in BCF, BCF80 and BCF100 treatments decreased by 9%, 7% and 2% compared with UF. The maize yield of BCF treatment decreased by 3% compared with UF, however, biochar-based fertilizer combined with chemical fertilizer increased maize yield. Compared with UF, the maize yield of BCF60, BCF80 and BCF100 increased by 15%, 21% and 9%, respectively. The comprehensive warming potential of greenhouse gases was BCF60 ＞ UF ＞ BCF100 ＞ BCF80 ＞ CK ＞ BCF, while the emission intensity of greenhouse gases was CK＞UF＞BCF＞BCF100＞BCF60＞BCF80. The results indicated that compared with UF, the comprehensive warming potential of greenhouse gases in BCF60 increased by 1.5% in maize season, while the comprehensive warming potential and emission intensity of greenhouse gases in BCF80 respectively decreased by 25% and 38% in maize season, showing that the alleviated ability of global warming potential to a certain extent with the reduction of chemical fertilizer by 20% combined with biochar-based fertilizer.【Conclusion】Fertilizer reduction of 20% with biochar-based fertilizer can reduce cumulative greenhouse gas emissions, comprehensive warming potential and greenhouse gas emission intensity, and increase maize yield in a short period of time.
Keywords：
biochar-based fertilizer; greenhouse gas emission flux; comprehensive warming potential; greenhouse gas emission intensity;
- DOI：
10.16445/j.cnki.1000-2340.20220906.003
- Series：
(D) Agriculture
- Subject：
Crop
- Classification Code：
S513
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