Matéria orgânica e qualidade do solo em pastagem submetida a adubação com cama de aviário no Cerrado
Data
2017-02-17
Autores
Silva, Camila Menezes Rodrigues da
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Universidade Federal de Mato Grosso
Resumo
The objective of the present study was to evaluate the accumulation of organic matter
and the biological attributes of soil quality in pasture submitted to fertilization with aviary
beds. The soil of the experimental area is a Distroferric Red Latosol divided into 16
paddocks of 0.5 ha each with Uroclhoa decumbens grass in a rotational grazing
system. The experiment consists of the following accumulated doses of turkey bed and
the respective years of application: T0 - control without application; T1 - 26.32 Mg ha 1 (8.70 - 2008 + 7.32 - 2011 + 5.30 - 2012 + 5.00 - 2014); T2 - 43.15 Mg ha-1 (7.81 -
2008 + 8.69 - 2010 + 7.89 - 2011 + 7.34 - 2012 + 5.71 - 2013 + 5.71 - 2014); 3 - 57.6
Mg ha-1 (14,45 - 2008 + 7,81 - 2009 + 8,69 - 2010 + 7,89 - 2011 + 7,34 - 2012 + 5,71
- 2013 + 5,71 - 2014). There were increases in the contents and stocks of total organic
carbon, total nitrogen and particulate as a function of turkey bed application.
Differently, the particulate organic carbon was not influenced by the treatments. The
high N availability, provided by the fertilizer, reduced the COP / NP ratio, but did not
influence the COT / NT ratio. The microbial biomass was modified before the doses,
reaching maximum points for the C-BM, metabolic and microbial quotient in T2. From
the second dose, there were higher C and N rent rates for the 0-1m layer compared to
the 0-0.2m layer. The attributes that most contributed to soil quality monitoring were
C-BM, the microbial quotient, the metabolic quotient and the POP. The sequential
application of increasing doses of turkey litter was efficient in promoting improvements
in the chemical and biochemical attributes of the soil, with the increase of the stocks
and contents of soil C and N and modification of the microbial biomass. Evaluations of
retention rates of organic matter in the 0-0.2 m layer underestimate the results in
relation to the 0.0-1.0 m layer. The attributes that contributed most to the soil quality in
this management system were: microbial biomass carbon, microbial and metabolic
quotient, particulate organic carbon. The application of turkey litter promoted increases
in soil carbon and nitrogen contents and also positively influenced the activity of
microbial biomass. It increased the retention rate of carbon and nitrogen along the soil
profile. The microbiological attributes contributed the most to the improvement of soil
quality.
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Citação
SILVA, Camila Menezes Rodrigues da. Matéria orgânica e qualidade do solo em pastagem submetida a adubação com cama de aviário no Cerrado. 2017. 73 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2017.