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Article

How Does N Mineral Fertilizer Influence the Crop Residue N Credit?

1
Departamento de Ciência do Solo, Universidade de São Paulo, Escola Superior “Luiz de Queiroz”, Piracicaba, São Paulo 01246-903, Brazil
2
Instituto de Ciências Agrárias, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais 38400, Brazil
*
Author to whom correspondence should be addressed.
Received: 17 July 2020 / Revised: 23 August 2020 / Accepted: 27 August 2020 / Published: 8 September 2020
In no-tillage systems, there is an accumulation of crop residues (CR), which plays an essential role in the availability of soil-N. A study was set up to provide information regarding the N credit and the influence of N mineral fertilizer. There was the addition of a similar rate of residue (10 Mg ha−1; sugarcane, soybean, and brachiaria) and N mineral fertilizer (urea; 120 kg N ha−1) in loam soil. After the stabilization of biological activity (73 days), soil and remaining residues were collected, and C and N monitored. The results showed that the N credit was positive with the application of soybean, sugarcane, and brachiaria. There was a positive balance of the soybean N credit in soil with a reduction from 2.49 to 0.90 g kg−1 of N in remaining residue, and a direct increase of 90% of soil-N. There is no need of N fertilizer to potentialize the soybean N credit, but it is required to potentialize N credit of brachiaria and sugarcane. The urea demonstrated to be an excellent enhancer of brachiaria N credit, but it was not adequate for sugarcane residues. Based on our result, the accumulation and incorporation of CR can be considered as N credit with a positive contribution in soil-N. View Full-Text
Keywords: sugarcane; soybean; trash; soil N; waste management sugarcane; soybean; trash; soil N; waste management
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MDPI and ACS Style

Ferraz-Almeida, R.; da Silva, N.L.; Wendling, B. How Does N Mineral Fertilizer Influence the Crop Residue N Credit? Nitrogen 2020, 1, 99-110. https://0-doi-org.brum.beds.ac.uk/10.3390/nitrogen1020009

AMA Style

Ferraz-Almeida R, da Silva NL, Wendling B. How Does N Mineral Fertilizer Influence the Crop Residue N Credit? Nitrogen. 2020; 1(2):99-110. https://0-doi-org.brum.beds.ac.uk/10.3390/nitrogen1020009

Chicago/Turabian Style

Ferraz-Almeida, Risely, Natália L. da Silva, and Beno Wendling. 2020. "How Does N Mineral Fertilizer Influence the Crop Residue N Credit?" Nitrogen 1, no. 2: 99-110. https://0-doi-org.brum.beds.ac.uk/10.3390/nitrogen1020009

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