Crescimento e produtividade de milho em função da cultura antecessora

Oliveira, Priscila de; Nascente, Adriano Stephan; Kluthcouski, J.; Portes, Tomás de Aquino

doi:10.1590/s1983-40632013000300005

Cited by 13 publications

(22 citation statements)

References 16 publications

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“…Millet and common bean provided higher soybean grain yield (4,772 kg ha -1 and 5,200 kg ha -1 , respectively), while the soybean yield was 3,708 kg ha -1 , when grown after palisade grass (Oliveira et al 2013a). Corn yield was higher after common bean (8,133 kg ha -1 ), differing from millet (6,601 kg ha -1 ) and palisade grass (6,801 kg ha -1 ) (Oliveira et al 2013b).…”

Section: Resultsmentioning

confidence: 85%

“…The cover crops used here generate different amounts of straw distributed over the soil, as previously reported by Oliveira et al (2013b). Palisade grass generates 7,792 kg ha -1 , millet 5,371 kg ha -1 and common bean 4,926 kg ha -1 of straw.…”

Section: Resultsmentioning

confidence: 88%

“…These soil biological activity traits increased with soybean cropping, in comparison with corn. Lower metabolic quotient and soil enzymatic activity found in sequences with palisade grass may be related to the higher biomass and lower decay of U. brizantha mulch (Oliveira et al 2013a(Oliveira et al , 2013b, negatively correlated with general soil microbial activity. Similar results were observed in native vegetation (Ferreira et al 2010(Ferreira et al , 2011.…”

Section: Resultsmentioning

confidence: 95%

“…Cash crops were sown with row spacing of 0.90 m and 0.45 m and seeding density of 6.8 and 17 seeds m -1 , respectively for corn and soybean. Manual harvest was performed separately, according to the different maturation stages, at 120 and 150 days after emergence, respectively for soybean and corn (Oliveira et al 2013a(Oliveira et al , 2013b.…”

Section: Methodsmentioning

confidence: 99%

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Response of soil fungi and biological processes to crop residues in no-tillage system

Oliveira

Nascente

Ferreira

et al. 2016

Pesqui. Agropecu. Trop.

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Soil management and crop rotation can directly affect the soil microbial community. This study aimed at determining soil quality indicators and soilborne fungi in a no-tillage system. A randomized blocks design, in a 3 × 2 factorial arrangement, was used. Three cover crops (palisade grass, millet and common bean) provided straw and root residues to the following crops of corn and soybean. The common bean-soybean sequence provided little soil covering and higher metabolic quotient and soil basal respiration and total enzymatic activity, as well as a general increase of soilborne fungi. The principal component analysis revealed that 76.61 % of the variance can be explained by the three first components, with cover crops, soil basal respiration and metabolic quotient regarded as the main qualitative and quantitative sources of variance in the first component. Carbon from the microbial biomass was the soil quality indicator best correlated to crop yield and negatively correlated to Fusarium solani density. The Rhizoctonia solani population was correlated with higher metabolic quotient and soil total enzymatic activity and basal respiration. The palisade grass crop favored soil fungistasis and enhancement of antagonist Trichoderma spp. populations. The multivariate approach demonstrated the association of soil fungi with soil quality indicators, as well as a higher influence of cover crops on the variance observed, in comparison to cash crops.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Response of soil fungi and biological processes to crop residues in no-tillage system

Oliveira

Nascente

Ferreira

et al. 2016

Pesqui. Agropecu. Trop.

Self Cite

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“…The technique also assesses photosynthetic production by means of dry matter accumulation, allowing a better understanding of the factors that affect grain yield (URCHEI; RODRIGUES; STONE, 2000;FALQUETO et al, 2009;NASCENTE, 2012a;OLIVEIRA et al, 2013). Furthermore, grain yield in rice and other cereals is related to the amount of CO 2 fixed by the plant and to the partitioning of the photosynthesized substrate for the growth of grains and of other plant organs (TAIZ;ZEIGER, 2009;CONCENÇO et al, 2011;FAGERIA;MORAES;VASCONCELOS, 2011).Thus, the objective of this study was to assess the influence of the application of trinexapac-ethyl on upland rice crops through the analysis of plant growth and gas exchange.…”

Section: Introductionmentioning

confidence: 99%

Trinexapac-Ethyl Affects Growth and Gas Exchange of Upland Rice

et al. 2016

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-A major problem affecting some upland rice cultivars is the increase in plant size when subjected to high doses of nitrogen fertilizer, leading to high levels of lodging. A method to reduce the height of upland rice, and therefore lodging, would be to use plant growth regulators. However, little information exists on the effect of these regulators on plant physiological processes. Therefore, the objective of this study was to evaluate the influence of trinexapac-ethyl application in upland rice via analysis of growth and gas exchange. The experiment was carried out under greenhouse conditions using the BRS Primavera cultivar. A completely randomized design with eight replications was used. Treatments were carried out with and without the application of the plant growth regulator, and plants were subject to two-stage assessments in which physiological and gas-exchange indices were measured. The use of trinexapac-ethyl improved the growth of rice plants from the flowering to the physiological maturity stage, resulting in higher values of leaf area ratio, specific leaf area, and leaf matter ratio in treated plants. At the same time, it provided smaller reduction in net CO 2 assimilation at the physiological maturity stage. Thus, net/apparent assimilation rate did not change after the application of growth regulator, but relative growth rate decreased in these treated plants. These results indicate the occurrence of self-shading in rice plants induced by what might be a supra-optimum trinexapacethyl concentration.Keywords: Oryza sativa. Growth regulator. Physiological process. ETIL-TRINEXAPAC AFETANDO O CRESCIMENTO E AS TROCAS GASOSAS DO ARROZ DE TERRAS ALTASRESUMO -Um dos grandes problemas de alguns cultivares de arroz de terras altas é o aumento do porte da planta quando submetido a altas doses de fertilizante nitrogenado, atingindo altos índices de acamamento. Uma opção para diminuir a altura das plantas de arroz, e com isso também o acamamento, seria a utilização de reguladores vegetais, entretanto, existem poucas informações sobre o efeito desses reguladores nos processos fisiológicos da planta. Assim, objetivou-se, por meio da análise de crescimento e de trocas gasosas, avaliar a influência da aplicação de etil-trinexapac na cultura do arroz de terras altas. O experimento foi conduzido em casa-de-vegetação usando-se a cultivar BRS Primavera. Foi utilizado o delineamento experimental inteiramente casualizado, com oito repetições. Os tratamentos foram constituídos sem e com aplicação de regulador de crescimento vegetal e dois estádios de desenvolvimento avaliados. Foram estimados os índices fisiológicos e trocas gasosas. O uso de regulador de crescimento etil-trinexapac proporcionou melhor desenvolvimento das plantas de arroz do estádio de florescimento a maturação fisiológica, resultando em valores de RAF, AFE e PMF mais elevados nas plantas tratadas. Paralelamente, proporcionou menor redução na assimilação líquida de CO 2 na fase de maturação fisiológica. Assim, a TAL não sofreu alteração em função d...

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