Resposta da aveia preta (&lt;em&gt;Avena strigosa&lt;/em&gt; schreb) à irrigação por aspersão e adubação nitrogenada

Luz, Pedro Henrique de Cerqueira; Herling, Valdo Rodrigues; Braga, Gustavo José; Filho, José Carlos Machado Nogueira; Faria, Letícia de Abreu; Lima, César Gonçalves de

doi:10.4025/actasciagron.v30i3.3555

Cited by 8 publications

(2 citation statements)

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“…Luz et al [27] 0, 50, 100, and 150 kg N ha −1 , respectively, lower than those found in the present work. Results of sorghum and black oat MV show high response to N fertilization, but it is also important to consider the genotypes selection, region climate, and especially rainfall distribution.…”

Section: Discussioncontrasting

confidence: 56%

Nitrogen Efficiency and Nutrient Absorption by a Sorghum-Oats Forage Succession

Restelatto¹,

Pavinato

Sartor³

et al. 2015

Advances in Agriculture

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Balance between nutrient uptake by the crop and the amount of applied fertilizer is desired in a production system, and this measurement can predict the nutrient use efficiency. The present study aimed to evaluate nitrogen-(N-) use and recovery efficiency and extraction of N, phosphorus (P), and potassium (K) by sorghum (Sorghum bicolor) and black oat (Avena strigosa) forages under nitrogen fertilization in three consecutive crop cultivation. The experiment was carried out at Federal Technological University of Paraná (UTFPR), Dois Vizinhos, Paraná, Brazil, in Rhodic Hapludox soil. Treatments included 0, 37.5, 75, 150, 225, 300, and 375 kg N ha −1 applied to sorghum in the summer seasons of 2010/2011 and 2011/2012, intercalated by, respectively, 0, 40, 80, 120, 160, 200, and 240 kg N ha −1 applied to black oat in the winter/2011. Forage production, N, P, and K extraction, and N recovery efficiency were determined through samplings during the crop cycle. The highest sorghum forage production and N and K extraction were under 230 to 300 kg N ha −1 , which was around 190 kg N ha −1 for black oat. The values of N recovery, efficiency, and N-use physiological efficiency were higher under lower N rates for both crops. Based on this, about 150 kg N ha −1 is recommended to obtain good sorghum forage production with higher N efficiency levels, which is about 120 kg N ha −1 for black oat.

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Section: Discussioncontrasting

confidence: 56%

Nitrogen Efficiency and Nutrient Absorption by a Sorghum-Oats Forage Succession

Restelatto¹,

Pavinato

Sartor³

et al. 2015

Advances in Agriculture

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“…Highest oats biomass yield were reported by Primavesi et al (2002) and Luz et al (2008), the latter authors emphasizing the superiority of irrigation to promote increased biomass production.…”

Section: Oats Biomassmentioning

confidence: 94%

Effects of early compost application on no-till organic soybean

2012

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Weed control has always been an important issue in agriculture. With the advent of no-till systems, soil erosion was reduced but herbicide use was increased. Organic no-till systems try to adjust reduced erosion to the no use of herbicides. Nevertheless, this adjustment is limited by the cost of mechanical weed control. This cost may be reduced by improved cultural weed control with cover crops mulches. In this paper we report a study on the application of compost manure on an oats winter cover crop, preceding soybean, instead of on the soybean summer crop. Treatments comprised a control without compost manure, and compost manure doses of 4 and 8 Mg ha-1 applied either on oats in winter or soybean in summer, organized in a randomized block design, with five replications. In summer, plots were split into weed-controlled or not controlled subplots. The timing of application and the manure doses did not affect the oats biomass or the soybean performance. However, in summer, without water stress, the application of manure at 8 Mg ha-1 directly on soybean has reduced weed biomass in this crop.

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