Physical attributes and limiting water range as soil quality indicators after mechanical harvesting of sugarcane

Autor: Filho, Oswaldo Julio Vischi, de Souza, Zigomar Menezes, de Souza, Gustavo Soares, da Silva, Reginaldo Barbosa [UNESP], Torres, José Luiz Rodrigues, de Lima, Márcio Emanuel, Tavares, Rose Luiza Moraes
Přispěvatelé: Universidade Estadual de Campinas (UNICAMP), INCAPER/CRDR-SC/FEBN, Universidade Estadual Paulista (UNESP), Federal Institute of Triângulo Mineiro (IFTM)
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Popis: Made available in DSpace on 2022-04-29T08:00:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Monitoring soil physical quality in areas cultivated with sugarcane has become a key management practice of this crop. It is due to the in-field traffic of heavy machines, implements, high mass harvesters and transhipments in the area have caused changes in soil structure and promoted the fall of the crop yield.. This study evaluated physical attributes of soil and the least limiting water range to assess the effects caused by wheel traffic in areas with mechanized harvest of sugarcane. The design was completely randomized in a factorial 2 x 2 x 4, which were evaluated two areas of mechanical harvesting: 1 - Six years (T1); 2 - Eighteen years of cultivation (T2); Two sampling sites: 1 - Canteiro; 2 - Planting line; Four layers of soil sampled (0.00 to 0.10, 0.10-0.20, 0.20-0.30 and 0.30-0.40 m) with 4 repetitions. We evaluated bulk density (BD), mechanical resistance to penetration (RP), water content in the soil (WCS), macroporosity (Ma), microporosity (Mi), total porosity (TP), water retention curve, the least limiting water range (LLWR) and soil organic carbon (SOC). We observed that the area with mechanical harvest system after three crop cycles produced a high load-bearing capacity and high SOC. The same area also demonstrated high Ma and LLWR, and low BD and RP levels in the rows. The LLWR levels were high as well in the area with one cane cycle but decreased as the number of harvest cycles increased. In the areas with one and three cycles the critical bulk density (CBD) ranged between 1.40-1.50 Mg m-3 and 1.24-1.28 Mg m-3 respectively, while the LLWR was zero (LLWR = 0) with the limiting RP between 2.0 and 3.5 Mpa. The physical attributes are changed by heavy machinery traffic in the cane fields, but the effects of these changes are minimized when several crop cycles are conducted in the same area. The State University of Campinas Department of Water and Soil Cidade Universitária Zeferino Vaz, Avenida Cândido Rondon, 501 INCAPER/CRDR-SC/FEBN, Rod, ES-483, km 2.5 Paulista State University Júlio de Mesquita Filho Department of Soils Campus de Registro, Avenida Nelson Brihi Badur, no 430 Federal Institute of Triângulo Mineiro (IFTM) Campus Uberaba, Rua João Batista Ribeiro, 4000 Department of Agriculture and Supply of the State of São Paulo, Avenida Brasilm no 2.340 Paulista State University Júlio de Mesquita Filho Department of Soils Campus de Registro, Avenida Nelson Brihi Badur, no 430
Databáze: OpenAIRE
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