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| Titel |
Effect of biochar compound fertilizers on crop yield and fertilizer N use efficiency |
| VerfasserIn |
Lianqing Li, Xiangfeng Fu, Qiu Xie, Liangzhu Qiu, Zexian Lu, Genxing Pan |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250140823
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| Publikation (Nr.) |
 EGU/EGU2017-4262.pdf |
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| Zusammenfassung |
| In order to meet the increasing demand for food in China, chemical fertilizers (NPK
fertilizers) application continue to rise in agricultural production. Overuse of nitrogen
fertilizer has occurred widely, and causes great challenges in environmental sustainability. To
meet the need for reducing chemical fertilizer use and enhancing fertilizer N use efficiency,
biochar compound fertilizers (BCF) are currently produced. Biochar are produced from crop
straw with a maximum temperature of 500-600oC. Biochar compound fertilizer produced by
rotary granulator. The nutrients proportion are 15:15:10 ( N:P2O5:K2O). Field
experiments were conducted in 8 sites across the major crop production areas from
Heilongjiang in north east to Hubei in central China, from Yili, Xinjiang in the west to
Suqian, Jiangsu in the east. The results showed that rice and maize yield increased by
6-10% and 5-12%, respectively, compared with chemical fertilizer. N use efficiency
increased by 9.4-45.46% for rice, and 12.39-52.93% for maize. The rate of fertilizer
application decreased by 8-12%, and a cost saving by 8-10% compared with chemical
fertilizer. Protein content of grain increased by 3-10%. It indicates that biochar had the
potential to form a more effective fertilizer that improved crop yield and the quality. |
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