Abstract
The use of biochar can bring benefits such as long-term carbon sequestration and water use efficiency, being an alternative for semiarid regions. The objective of this study was to evaluate the impact of the application of coffee biochar on sandy soil on maize growth, chemical, microbial and biochemical attributes in Entisol. The experimental design was completely randomized, distributed in a 2 x 4 + 1 factorial scheme, two types of wastes coffee ground (MCG) and coffee husks (MCH), four doses (4, 8, 12 and 16 Mg ha-1) and control (CONT), without biochar. All treatments received organic fertilization with manure. Coffee biochar applied to sandy soil cultivated with maize, as predicted, increased the total soil C content, mainly coffee husk biochar that increases twice the C content when compared to the control. Nutrient and some enzyme activities of soils were improved with increasing coffee biochar doses. Microbial biomass of soils amended with the biochars MCH16 and MCH12 showed an increase of 100 and 116%, respectively. This study demonstrated a clear response of the soil nutrients, microbial community and enzyme activities change to types and doses of biochar. However, the effects on the actual maize plant growth with these biochar treatments were not significative in the first cycle. Impacto do biochar de café sobre o carbono, biomassa microbiana e atividades enzimáticas de solo arenoso do semi-árido, cultivado com milhoR E S U M OO uso do biochar pode trazer benefícios como o sequestro de carbono a longo prazo e a eficiência do uso da água, sendo uma alternativa para regiões semi-áridas. O objetivo deste estudo foi avaliar o impacto da aplicação de biochar oriundos de resíduos de café aplicado em solo arenoso sobre o crescimento de milho, atributos químicos, microbianos e bioquímicos. O delineamento experimental utilizado foi inteiramente casualizado, distribuído em esquema fatorial 2 x 4 + 1, sendo dois tipos de resíduos de café: borra (MCG) e casca de café (MCH), quatro doses (4, 8, 12 e 16 Mg ha-1) e controle (CONT), sem biochar. Todos os tratamentos receberam adubação orgânica com esterco bovino. O biochar de café aplicado em solo arenoso cultivado com milho, conforme previsto, aumentou o teor total de C no solo, principalmente o biochar de casca de café, que aumentou em dobro do teor de C, comparado ao controle. Os teores de nutrientes e algumas atividades enzimáticas dos solos foram aumentados com o aumento das doses de biochar de café. Solos que receberam os tratamentos MCH16 e MCH12 aumentaram a biomassa microbiana em 100 e 116%, respectivamente. Este estudo demonstrou uma clara resposta dos nutrientes do solo, comunidade microbiana e atividades enzimáticas relativos aos tipos e doses de biochar. Por isso, recomenda-se o uso do biochar de café para o aumento da qualidade de solos arenosos no semi-árido brasileiro.Palavras-chave: Zea mays, enzima extracelular do solo, carbono orgânico total, biomassa microbiana do solo.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Coffee biochar increased total soil carbon content.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coffee biochar applied to sandy soil cultivated with maize, as predicted, increased the total soil C content”
Claim · model-written summary
Coffee husk biochar doubled soil carbon content compared with the control.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“coffee husk biochar that increases twice the C content when compared to the control.”
t0“maize”
Claim · model-written summary
Increasing coffee biochar dose improved soil nutrient content.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nutrient and some enzyme activities of soils were improved with increasing coffee biochar doses.”
t0“maize”
Claim · model-written summary
Increasing coffee biochar dose improved some soil enzyme activities.
- Treatment
- increasing coffee biochar dosese0
- Outcome
- some enzyme activities of soilse0
- Direction
- improvede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nutrient and some enzyme activities of soils were improved with increasing coffee biochar doses.”
t0“maize”
Claim · model-written summary
MCH16 increased soil microbial biomass by 100%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microbial biomass of soils amended with the biochars MCH16 and MCH12 showed an increase of 100 and 116%, respectively.”
t0“maize”
Claim · model-written summary
MCH12 increased soil microbial biomass by 116%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microbial biomass of soils amended with the biochars MCH16 and MCH12 showed an increase of 100 and 116%, respectively.”
t0“maize”
Claim · model-written summary
Coffee biochar treatments did not significantly affect maize growth in the first cycle.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects on the actual maize plant growth with these biochar treatments were not significative in the first cycle.”
Claim · model-written summary
The Portuguese summary recommends coffee biochar for sandy soil quality.
- Outcome
- uso do biochar de café para o aumento da qualidade de solos arenosose0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“recomenda-se o uso do biochar de café para o aumento da qualidade de solos arenosos no semi-árido brasileiro.”
t0“maize”
The same questions in other papers
Coffea · molecular: metabolites · Zea mays (maize)Results agree
2 papers in the same direction as this paper
- positive
- positive
biochar · molecular: metabolites · Zea mays (maize)Positive and negative results
30 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
29 papers more in this group
See all 33 papers →biochar · growth · Zea mays (maize)Positive and negative results
9 papers in the same direction as this paper · 180 in the opposite direction
- positive
- positive
- positive
186 papers more in this group
See all 190 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.