Aggregation Index and Carbon and Nitrogen Contents in Aggregates of Pasture Soils under Successive Applications of Pig Slurry in Southern Brazil
Pig slurry (PS) applications affect soil aggregation and carbon and nitrogen contents in aggregates. The objective of this study was to evaluate changes caused by successive applications of PS and mineral fertilizer on soil aggregation and carbon (C) and nitrogen (N) contents in aggregates of a clay...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/12/2/320 |
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| author | Cristiano Santos Arcângelo Loss Marisa de Cássia Piccolo Eduardo Girotto Marcos Paulo Ludwig Julia Decarli José Luiz Rodrigues Torres Gustavo Brunetto |
| author_facet | Cristiano Santos Arcângelo Loss Marisa de Cássia Piccolo Eduardo Girotto Marcos Paulo Ludwig Julia Decarli José Luiz Rodrigues Torres Gustavo Brunetto |
| author_sort | Cristiano Santos |
| collection | DOAJ |
| description | Pig slurry (PS) applications affect soil aggregation and carbon and nitrogen contents in aggregates. The objective of this study was to evaluate changes caused by successive applications of PS and mineral fertilizer on soil aggregation and carbon (C) and nitrogen (N) contents in aggregates of a clayey Typic Hapludox cultivated with <i>Cynodon dactylon</i> cv. Tifton-85 in southern Brazil. The treatments consisted of six annual applications of PS (100, 200, 300, and 400 kg N ha<sup>−1</sup>) and urea (200 kg N ha<sup>−1</sup>), and a control with no fertilizer application. Soil samples were collected in March 2019 and evaluated for aggregate stability, through the geometric mean diameter of aggregates (GMD), and GMD sensitivity index (SI<sub>GMD</sub>), and mass of macro-, meso-, and microaggregates. Total organic carbon and nitrogen contents were determined in macroaggregates and microaggregates. Applications of PS to pasture soils increase dry matter production of Tifton-85 and can increase soil aggregation by increasing the mass of macroaggregates. The highest PS rates decreased aggregate stability, resulting in lower macroaggregate mass, GMD, and SI<sub>GMD</sub>, and higher microaggregate mass. PS applications to pasture soils can increase C and N contents in macro and microaggregates, and improve soil aggregation when using the rates of 100 or 200 kg N ha<sup>−1</sup>, mainly in subsurface layers. |
| first_indexed | 2024-03-09T22:51:51Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T22:51:51Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-f3cabd86c7c64f63941ff72631ab3aae2023-11-23T18:19:57ZengMDPI AGAgronomy2073-43952022-01-0112232010.3390/agronomy12020320Aggregation Index and Carbon and Nitrogen Contents in Aggregates of Pasture Soils under Successive Applications of Pig Slurry in Southern BrazilCristiano Santos0Arcângelo Loss1Marisa de Cássia Piccolo2Eduardo Girotto3Marcos Paulo Ludwig4Julia Decarli5José Luiz Rodrigues Torres6Gustavo Brunetto7Center of Agricultural Sciences, Federal University of Santa Catarina, Itacorubi, Florianópolis 88034-000, SC, BrazilCenter of Agricultural Sciences, Federal University of Santa Catarina, Itacorubi, Florianópolis 88034-000, SC, BrazilCenter of Nuclear Energy in Agriculture, University of São Paulo, Piracicaba 13416-970, SP, BrazilFederal Institute of Education, Science and Technology of Rio Grande do Sul, Campus Bento Gonçalves, Bento Gonçalves 95700-206, RS, BrazilFederal Institute of Education, Sciences, and Technology of Rio Grande do Sul, Ibirubá Campus, Ibirubá 98200-000, RS, BrazilFederal Institute of Education, Sciences, and Technology of Rio Grande do Sul, Ibirubá Campus, Ibirubá 98200-000, RS, BrazilFederal Institute of Triângulo Mineiro, Uberaba 38064-790, MG, BrazilCenter of Rural Sciences, Federal University of Santa Maria, Camobi, Santa Maria 97105-900, RS, BrazilPig slurry (PS) applications affect soil aggregation and carbon and nitrogen contents in aggregates. The objective of this study was to evaluate changes caused by successive applications of PS and mineral fertilizer on soil aggregation and carbon (C) and nitrogen (N) contents in aggregates of a clayey Typic Hapludox cultivated with <i>Cynodon dactylon</i> cv. Tifton-85 in southern Brazil. The treatments consisted of six annual applications of PS (100, 200, 300, and 400 kg N ha<sup>−1</sup>) and urea (200 kg N ha<sup>−1</sup>), and a control with no fertilizer application. Soil samples were collected in March 2019 and evaluated for aggregate stability, through the geometric mean diameter of aggregates (GMD), and GMD sensitivity index (SI<sub>GMD</sub>), and mass of macro-, meso-, and microaggregates. Total organic carbon and nitrogen contents were determined in macroaggregates and microaggregates. Applications of PS to pasture soils increase dry matter production of Tifton-85 and can increase soil aggregation by increasing the mass of macroaggregates. The highest PS rates decreased aggregate stability, resulting in lower macroaggregate mass, GMD, and SI<sub>GMD</sub>, and higher microaggregate mass. PS applications to pasture soils can increase C and N contents in macro and microaggregates, and improve soil aggregation when using the rates of 100 or 200 kg N ha<sup>−1</sup>, mainly in subsurface layers.https://www.mdpi.com/2073-4395/12/2/320<i>Cynodon</i> sp.soil aggregationswine slurrymineral fertilizer |
| spellingShingle | Cristiano Santos Arcângelo Loss Marisa de Cássia Piccolo Eduardo Girotto Marcos Paulo Ludwig Julia Decarli José Luiz Rodrigues Torres Gustavo Brunetto Aggregation Index and Carbon and Nitrogen Contents in Aggregates of Pasture Soils under Successive Applications of Pig Slurry in Southern Brazil Agronomy <i>Cynodon</i> sp. soil aggregation swine slurry mineral fertilizer |
| title | Aggregation Index and Carbon and Nitrogen Contents in Aggregates of Pasture Soils under Successive Applications of Pig Slurry in Southern Brazil |
| title_full | Aggregation Index and Carbon and Nitrogen Contents in Aggregates of Pasture Soils under Successive Applications of Pig Slurry in Southern Brazil |
| title_fullStr | Aggregation Index and Carbon and Nitrogen Contents in Aggregates of Pasture Soils under Successive Applications of Pig Slurry in Southern Brazil |
| title_full_unstemmed | Aggregation Index and Carbon and Nitrogen Contents in Aggregates of Pasture Soils under Successive Applications of Pig Slurry in Southern Brazil |
| title_short | Aggregation Index and Carbon and Nitrogen Contents in Aggregates of Pasture Soils under Successive Applications of Pig Slurry in Southern Brazil |
| title_sort | aggregation index and carbon and nitrogen contents in aggregates of pasture soils under successive applications of pig slurry in southern brazil |
| topic | <i>Cynodon</i> sp. soil aggregation swine slurry mineral fertilizer |
| url | https://www.mdpi.com/2073-4395/12/2/320 |
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