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Optimal nitrogen fertilizer, which determines straw properties, and pyrolysis temperatures produce desired-biochars that can be used as a soil amendment

文献类型： 外文期刊

作者： Zhang, Jining 1 ; Zhang, Xianxian 1 ; Wang, Cong 1 ; Sun, Huifeng 1 ; Zhou, Sheng 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, Shanghai 201403, Peoples R China

2.Shanghai Engn Res Ctr Low carbon Agr SERCLA, Shanghai 201415, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Low carbon Green Agr Southwestern China, Shanghai 201403, Peoples R China

关键词： Carbon sequestration; Nitrogen fertilizer rate; Nutrient retention; Pyrolysis temperature; Straw

期刊名称：CHEMOSPHERE （ 影响因子：8.943； 五年影响因子：8.52 ）

ISSN： 0045-6535

年卷期： 2022 年 308 卷

页码：

收录情况： SCI

摘要： This study investigated the straw harvested after nitrogen (N) fertilizer application levels (0, 75, 150 and 225 kg N hm-2). The N fertilizer increased straw yield by 115.4-190.6%. In addition to N fertility, the pyrolysis tem-peratures (300, 500 and 700 degrees C) induced significant changes of the straw-derived biochar samples. The yield reduced from 41.4 wt% to 23.2 wt%, the residence time increased from 272 yr to 2194 yr, and the residual coefficient of organic C (Fperm) increased from 0.65 to 0.93 for the biochar samples as the temperature rising. The parameters of C sequestration were mainly affected by pyrolysis temperature. The N + P2O5+K2O content (5.6-8.8%) of the biochar samples was more in the 500 degrees C treatment. The characteristics of nutrient supply were affected by both the N fertility and pyrolysis temperature. The N fertilizer rate of 150 kg N hm2 in the soil for wheat straw, together with the 500 degrees C treatment induces the best nutrient donor and C sequestration after biochar incorporation into the soil.

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