Winter pasture and cover crops and their effects on soil and summer grain crops

Pesquisa Agropecuária Brasileira

Alvadi Antonio Balbinot Junior¹  Milton Da Veiga¹  Anibal De Moraes²  Adelino Pelissari²  Álvaro Luiz Mafra¹  Cristiano Dela Piccolla¹ 

[1] ,Universidade Federal do ParanáCuritiba PR ,Brazil

关键词: compaction;    cover crops;    crop-livestock integration;    no-tillage;    organic carbon;    compactação;    plantas de cobertura;    integração lavoura-pecuária;    plantio direto;    carbono orgânico;   

DOI  :  10.1590/S0100-204X2011001000032

来源: SciELO

【 摘 要 】

The objective of this work was to evaluate the effect of winter land use on the amount of residual straw, the physical soil properties and grain yields of maize, common bean and soybean summer crops cultivated in succession. The experiment was carried out in the North Plateau of Santa Catarina state, Brazil, from May 2006 to April 2010. Five strategies of land use in winter were evaluated: intercropping with black oat + ryegrass + vetch, without grazing and nitrogen (N) fertilization (intercropping cover); the same intercropping, with grazing and 100 kg ha-1 of N per year topdressing (pasture with N); the same intercropping, with grazing and without nitrogen fertilization (pasture without N); oilseed radish, without grazing and nitrogen fertilization (oilseed radish); and natural vegetation, without grazing and nitrogen fertilization (fallow). Intercropping cover produces a greater amount of biomass in the system and, consequently, a greater accumulation of total and particulate organic carbon on the surface soil layer. However, land use in winter does not significantly affect soil physical properties related to soil compaction, nor the grain yield of maize, soybean and common bean cultivated in succession.

【 授权许可】

CC BY   
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