Soil Organic Matter and Aggregate Stability in Soybean, Maize and Urochloa Production Systems in a Very Clayey Soil of the Brazilian Savanna

被引：9
作者：
da Silva, Juslei Figueiredo [1 ]
Gontijo Neto, Miguel Marques [2 ]
da Silva, Gustavo Ferreira [1 ]
Borghi, Emerson [2 ]
Calonego, Juliano Carlos [1 ]
机构：
[1] Sao Paulo State Univ UNESP, Sch Agr, Dept Crop Sci, BR-18610034 Botucatu, SP, Brazil
[2] Brazilian Agr Res Corp EMBRAPA, EMBRAPA Maize & Sorghum, BR-35701970 Sete Lagoas, Brazil
来源：
AGRONOMY-BASEL | 2022年 / 12卷 / 07期
关键词：
typic haplorthox; soil organic carbon; no-tillage system; Glycine max; Zea mays; Urochloa brizantha; CARBON FRACTIONS; NO-TILLAGE; MANAGEMENT; IMPACT; TERM; SEQUESTRATION; TURNOVER; DYNAMICS;
D O I：
10.3390/agronomy12071652
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
Forage grasses cultivation in production system with soybean and maize is an alternative to improve tropical weathered soils quality in Brazil. The aim of the study was to evaluate the effects in the production systems involving cultivation of Urochloa brizantha cv. Piata, in monoculture or in succession with soybean and maize crops, on organic matter and structuring of soil in Brazilian savanna. The experiment was implemented in the 2010/2011 season. The treatments consisted of nine production systems and a native forest (savanna) as a reference area. In March 2017, soil sampling was carried out for C and N analysis, physical and chemical fractionation of SOM and aggregate stability. Production systems influenced total organic carbon (TOC) and aggregate stability, mainly in the surface layers, leading to changes in SOM quality. TOC was 31% lower in monoculture soybean production system, when compared to native savanna area, in the 0.00-0.20 m layer. The agricultural production systems influence organic matter quality and soil aggregates stability. For the Brazilian savanna conditions, grain cultivation systems under no-tillage that integrate Urochloa brizantha cv. Piata contribute to the soil quality improvement. Soybean monoculture generally provides worse soil quality indices compared to other agricultural production systems.
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页数：15
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