Produção de silagem de híbridos de milho e sorgo sem nitrogênio de cobertura em safra de verão

Guareschi, Roni Fernandes; Brasil, Rafaella Belchior; Perin, A.; Ribeiro, Josimar

doi:10.1590/s1983-40632010000400016

Cited by 8 publications

(3 citation statements)

References 22 publications

(12 reference statements)

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“…Guareschi et al (12) obtiveram produções de MS de sorgo variando de 12,3 a 20,5 t/ha, conforme a cultivar utilizada, enquanto Atis et al (13) , para o sorgo colhido no estágio pastoso, verificaram produções de 4,5 a 20,6 t/ha, dependendo da cultivar e nível de adubação.…”

Section: Resultsunclassified

Milheto Como Silagem Comparado a Gramíneas Tradicionais: Aspectos Quantitativos, Qualitativos E Econômicos

et al. 2018

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Resumo Foram avaliados a composição morfológica, os parâmetros agronômicos, a produção de massa seca das plantas forrageiras utilizadas para o processo de ensilagem, bem como a caracterização do processo fermentativo, em diferentes tempos de abertura dos mini-silos (3, 7, 15, 30, 60, 120 dias) após a ensilagem. Procedeu-se também às determinações das perdas de efluentes e gases, além da composição bromatológica e fracionamento de proteína das silagens. Também foi estimado o custo de produção e a produção de leite em função da matéria seca das silagens produzidas a partir de diferentes gramíneas. As espécies forrageiras avaliadas foram: milheto ADR-7010, sorgo BRS 610, milho AG 5055 com espiga, milho AG 5055 sem espiga e cana-de-açúcar IAC 86-2480. Foram observadas diferenças significativas tanto para produção, quanto composição bromatológica e custos de produção. O milheto não se mostrou competitivo com as demais forrageiras; entretanto, constitui opção como cultura de inverno em decorrência de sua baixa exigência hídrica quando comparado às demais culturas.

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Section: Resultsunclassified

Milheto Como Silagem Comparado a Gramíneas Tradicionais: Aspectos Quantitativos, Qualitativos E Econômicos

et al. 2018

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“…The differential response among the maize cultivars may have occurred due to genetic characteristics of each cultivar, which have vegetative development and accumulation of different plant mass, as well as differences in its lifecycle. Thus, it is important to the knowledge of the differential behavior between the materials available in the market, to be able to position, in production areas, the forage species more responsive in function of different cultivars of maize (Guareschi et al, 2010). The cultivar Riber has a super early cycle, however there are genetic differences and morphological between the maize cultivars, which may allow the forage to have an increase in production of culms in relation to maize Dekalb, thus favoring, its development.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Urochloa ruziziensis in different sowing seasons intercropping with late corn cultivars

2018

Aust. J. Basic & Appl. Sci.

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INTRODUCTION Maize (Zea mays L.) is one monocotyledon from the family Poaceae of great economic importance for Brazil as well as for the whole world. In recent years, Brazil increased significantly its production and export. In the states in the Midwest region of Brazil, agriculture is based in succession between soybean and corn. However, in most of the crops, soon after the corn harvest, the soil is maintained with little coverage of straw, leaving it thus exposed and consequently more vulnerable to degradation. Important changes in the system of production of these crops have occurred in recent years and had as a result the expansion in direct sowing system (SSD) and also in the integration of crop breeding (CLI). This latter system, the CLI, consists of the deployment of the implantation of the intercropping of annual cultivations with fodder species, being that the grass Urochloa genus (formerly called Brachiaria) is the forage species more used, being a kind that presents a good competitiveness with weeds, tolerance to shading, soil high protection, tolerance to drought and also presents a wide adaptability climate change, as well as forming dense pastures, when submitted to favorable conditions. The corn intercropping with Brachiaria is an important alternative to increase and keep the straw on the soil surface, with quality and quantity sufficient to express the maximum potential of SSD, since it increases the inflow of the vegetable waste and provides higher economic return in the cultures that will be sown in succession (Ceccon et al., 2008). Due to the climate conditions of the West, the SSD Center along with the rotation of crops and pastures, is pointed out as the form of soil management more adequate to reconcile productivity with sustainability. The agriculture, however, presents high vulnerability to climate conditions and variations in market price quotations. To alleviate these problems, it is recommended to use the appropriate practices of soil management, as the SSD and the diversification of activities.

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“…For cropland conditions we adjusted the aboveground crop potential monthly production in order to reach mean values of 14.2 and 6.3 Mg ha -1 of aboveground biomass in corn and soybeans respectively, the average of productivity found in studies performed in Brazil (WALTER et al, 2009;BORDIN et al, 2008;DE CASTRO GAVA et al, 2010;GUARESCHI et al, 2010;BERGAMASCHI et al, 2013);FINOTO et al, 2012;SIMON, 2009). For all other parameters, the default values specified for Century 4.6 for pasture and cropland were used.…”

Section: Pastures and Annual Cropsmentioning

confidence: 99%

Soil organic carbon dynamics in sugarcane crop in south-central Brazil

Olaya¹

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Sugarcane planting area in Brazil has considerably increased during recent years by occupying areas used for pasture and grain crops production. Land use change (LUC) processes related to sugarcane expansion can affect the soil organic carbon (SOC) stocks and the quality of the soil organic matter. Preliminary studies have shown that the land-use transition into sugarcane lead a decrease in the SOC, however no studies have accessed the impact of LUC on the SOC distribution within soil particle-size classes. We investigated the modifications on total SOC, particulate organic carbon (POM) and mineral-associated C (MOM) in response to conversion from native vegetation (NV), pastures and annual cropland (AC) to sugarcane crop (SCN). Soil samples were collected at 34 field-sites to 0.2 m depth and POM fraction separated through 53-mm sieve after soil dispersion. Our results indicated that LUC affects both the labile as well as the more stable SOM fraction, with a mean C content decreasing of 40% and 30% in POM and MOM respectively, following the transition from NV to SCN. The replacement of pastures caused C depletion by 33% at POM and 30% at MOM; meanwhile C accumulation at MOM (5%) was detected for the conversion from AC to SCN. The impact of LUC on POM for AC-SCN transition could not be totally clarified, however the result could be an indication that the POM response to LUC varies as function of previous management in AC.

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Produção de silagem de híbridos de milho e sorgo sem nitrogênio de cobertura em safra de verão

Cited by 8 publications

References 22 publications

Milheto Como Silagem Comparado a Gramíneas Tradicionais: Aspectos Quantitativos, Qualitativos E Econômicos

Milheto Como Silagem Comparado a Gramíneas Tradicionais: Aspectos Quantitativos, Qualitativos E Econômicos

Assessment of Urochloa ruziziensis in different sowing seasons intercropping with late corn cultivars

Soil organic carbon dynamics in sugarcane crop in south-central Brazil

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