Eficiência agronômica no uso de nitrogênio mineral por cultivares de arroz de terras altas

Cancellier, Eduardo Lopes; Barros, Hélio Bandeira; Kischel, Elisângela; Gonzaga, Luiz Antônio de Menezes; Brandão, Diogo Ribeiro; Fidélis, Rodrigo Ribeiro

doi:10.5039/agraria.v6i4a1420

Cited by 24 publications

(27 citation statements)

References 8 publications

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“…The good soil chemical conditions observed through laboratory analysis, in which high levels of P, K, and organic matter were found, were sufficient for the plants for proper development up to the V4 stage. In a study carried out to verify the responses of different upland rice cultivars to nitrogen fertilization, Cancellier et al (2011) verifies that the cultivar used in the present study is responsive to low levels of nitrogen in the soil.…”

Section: Resultssupporting

confidence: 69%

Different soaking times and niacin concentrations affect yield of upland rice under water deficit conditions

et al. 2019

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Rice is an important source of energy for a large part of the world’s population. The development and application of technologies that contribute to the improvement of production forthis grain have great importance. The objective of this study was to evaluate the influence of rice seed immersion in a niacin solution on plant development, physiology and production. Thetreatments were defined by a combination of two immersion times for the seeds (12 h and 24 h) in four niacin concentrations (0.00, 100, 200 and 300 mg L-1) distributed in five replicates. Characteristics relating to seedling emergence, plant vegetativedevelopment, relative indices of chlorophyll and grain yield were evaluated. We verified that the immersion of the seeds for 12 h gave higher relative indices of chlorophyll, whereas immersion for 24 h increased the speed of emergence and the number of tillers and panicles. The doses of niacin positively affected the relative chlorophyll indices and the production characteristics, up to a maximum concentration of 172.57 mg L-1. We concluded that the immersion of rice seeds for 24 h increased the speed of seedling emergence, leaf number, and panicles per area. However, the relative indices of chlorophyll in leaves decreased. The use of niacin promoted the numbers of spikelets per panicle, fertility of the spikelets and the weight of 1000 grains, besides increasing the relative index of chlorophyll in the leaves of rice plants.

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Section: Resultssupporting

confidence: 69%

Different soaking times and niacin concentrations affect yield of upland rice under water deficit conditions

et al. 2019

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“…The variations in chlorophyll a/b ratio rise due to the differences between photosystems I and II (PSI / PSII), as well as to size and composition of the antenna complex of each photosystem that is responsible for light collection. These differences also can be attributed to growing and environmental conditions, as well as to the phenological stage (Cancellier et al, 2011;Borek et al, 2016). For Troyano, there was a reduction of the ratio of chlorophyll a/b, but that was not statistically different from 'Roxo de Valinhos' and PI-189.…”

Section: Resultsmentioning

confidence: 98%

“…However, White Genova showed a higher chlorophyll a/b ratio (Table 2). According to Cancellier et al (2011), cultivars that have a lower-chlorophyll a/b ratio are more efficient in capturing light, so that the plant can more efficiently capture the solar radiation at a time of low irradiance; therefore, there is a higher photosynthetic rate during its cycle. This fact explains the greater vegetative vigour of Troyano, as this genotype showed a larger branch diameter and a higher productive performance; the latter will be discussed below.…”

Section: Resultsmentioning

confidence: 99%

Phenology, vegetative growth, and yield performance of fig in Southeastern Brazil

Ferraz

Leonel

Souza

et al. 2020

Pesq. agropec. bras.

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The objective of this work was to evaluate the phenological patterns, vegetative growth, and yield characteristics of fig (Ficus carica)varieties in Southeastern Brazil. The 'Roxo de Valinhos', White Genova, PI-189, and Troyano varieties were distributed in a randomized complete block design and evaluated in the field. The following characteristics were assessed: number of days between pruning and the beginning of sprouting; leaf chlorophyll content; number of shoots on each branch; length, diameter, and number of internodes on each branch; number of leaves per plant; leaf area; number of fruit per plant; mass, length, and diameter of fruit; production and yield; and duration (days) of each phenological stage, such as thermal requirement models. 'Roxo de Valinhos' and White Genova sprouted the fastest and showed the largest number of shoots. Troyano obtained the greatest branch length and diameter, as well as the greatest number of fruit per plant, which had the shortest diameter and length and the lowest mass of fruit. Furthermore, Troyano showed the latest harvest, besides the thermal requirement of 4,577.31 degree-days. 'Roxo de Valinhos' and White Genova produced fruit with the greatest average mass and diameter and the longest length. Troyano shows better vegetative growth and produces more fruit per plant than 'Roxo de Valinhos', but both genotypes show similar yields.

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“…This information is crucial for selection of better-adapted cultivars to offseason conditions in the Cerrado in the south of Tocantins, as well as for future breeding programs with common bean crops (CABRAL et al, 2011;CANCELLIER et al, 2011b;MELO et al, 2007;). For the environment factor there was significance for all traits, evidencing differences between years for the conditions of soil and climate variations.…”

Section: Resultsmentioning

confidence: 99%

ommon beans genotypes behavior cultivated in cerrado soils (savannah) of southern Tocantins

Fidélis¹,

Sousa²,

Martinez³

et al. 2015

Biosci. J.

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ABSTRACT:Common bean was originated from the Americas and has shown enormous socioeconomic importance as the main source of feeding in many countries. Due to adoption of technologies such as irrigation, the bean has been cultivated at different times throughout the year, however, the lack of cultivars adapted to the climatic conditions of the Cerrado of Tocantins has limited obtaining best yields at the time of the season. Thus, the aim of this work was to evaluate the performance of common bean genotypes in three cropping years in Cerrado soils. The experiments were conducted in the field at the Experimental Station of the Federal University of Tocantins in the dry season of the years 2010, 2011 and 2012. The experimental design was a randomized block with four replications in a 8 x 3 factorial, consisting of eight genotypes and three years. The evaluated characteristics were plant height, the first pod height, number of pods per plant, number of seeds per pod, weight of hundred grains and grain yield. The Princesa genotype stood out with yields above 3,000 kg ha -1 in more than a year of cultivation, demonstrating its potential for cropping systems in the State of Tocantins. The genotype BRS-Esplendor was the only genotype that showed stable behavior for all traits.

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Eficiência agronômica no uso de nitrogênio mineral por cultivares de arroz de terras altas

Cited by 24 publications

References 8 publications

Different soaking times and niacin concentrations affect yield of upland rice under water deficit conditions

Different soaking times and niacin concentrations affect yield of upland rice under water deficit conditions

Phenology, vegetative growth, and yield performance of fig in Southeastern Brazil

ommon beans genotypes behavior cultivated in cerrado soils (savannah) of southern Tocantins

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