Avaliação de métodos de correção do estande para estimar a produtividade em milho

Schmildt, Edílson Romais; Cruz, Cosme Damião; Zanúncio, José Cola; Pereira, Paulo Roberto Gomes; Ferrão, R. G.

doi:10.1590/s0100-204x2001000800002

Cited by 26 publications

(42 citation statements)

References 3 publications

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“…Because of the lack of uniformity of the plants in some plots, grain yield was estimated by the formula of Zuber (Schimidt et al, 2001;Nascimento et al, 2003).…”

Section: Methodsmentioning

confidence: 99%

Use of Organic Compost Containing Waste from Small Ruminants in Corn Production

Souza

Melo

Primo

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:Composting is a useful way of transforming livestock waste into organic fertilizer, which is proven to increase soil nutrient levels, and thus crop yield. Remains from production and slaughter of small ruminants can become a source of important elements for plant growth, such as N, after microorganism-driven decomposition.The aim of this investigation was to evaluate the effects of this compost on soil fertility and on the nutritional status and yield of the corn crop. The experiment was conducted in a Haplic Luvisol in a randomized block design with six treatments and five application rates of the organic compound in Mg ha -1 : 3 (half the standard rate), 6 (standard rate), 9 (one and a half times the standard rate), 12 (twice the standard rate), and 24 (four times the standard rate) and an additional treatment with mineral fertilizers (110, 50 e 30 kg ha -1 of N, P 2 O 5 and K 2 O, respectively), with four blocks. Evaluations were performed for two harvests of rainfed crops, measuring soil fertility, nutritional status, and grain yield. The compost increased P, K, Na and Zn values in the 0.00-0.20 m layer in relation of mineral fertilization in 616, 21, 114 and 90 % with rate 24 Mg ha -1 in second crop. Leaf N, Mg, and S contents, relative chlorophyll content, and the productivity of corn kernels increased in 27, 32, 36, 20 e 85 %, respectively, of low rate (3 Mg ha -1 ) to high rate (24 Mg ha -1 ) with of application of the compost. Corn yield was higher with application of organic compost in rate of 24 Mg ha -1 than mineral fertilizer combination in second crop.

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“…Because of the lack of uniformity of the plants in some plots, grain yield was estimated by the formula of Zuber (Schimidt et al, 2001;Nascimento et al, 2003).…”

Section: Methodsmentioning

confidence: 99%

Use of Organic Compost Containing Waste from Small Ruminants in Corn Production

Souza

Melo

Primo

et al. 2016

Rev. Bras. Ciênc. Solo

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“…The other plants of the experimental unit were manually harvested in order to determine grain yield, which was carried out by calculating the weight of the product obtained in all the experimental unit per hectare, at 13% of average humidity. Covariance -Ideal Stand method, described by Schmildt et al (2001), was used for correction of grain yield due to the heterogeneity of plant stand. Mineral concentration was determined in random samples of 500 g grains of the F 6:8 line and of parents from each replication, in each growing season.…”

Section: Plant Materials and Advanced Generationsmentioning

confidence: 99%

Genetic parameters of agronomic and nutritional traits of common bean (Phaseolus vulgaris L.) populations with biofortified grains

Maziero¹,

Ribeiro²,

Facco³

2016

Aust J Crop Sci

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The objective of this study was to estimate genetic parameters for agronomic and nutritional traits in four common bean populations with biofortified grains for minerals, and to identify the superior population for these traits. Thus, four common bean populations were obtained by controlled crossings between parents contrasting for potassium (P 1 ), phosphorus (P 2 ), zinc (P 3 ) and copper (P 4 ). A total of 40 lines in F 6:8 generation of each population and nine parents were evaluated in two field experiments (rainy season of 2012 and dry season of 2013) in the state of Rio Grande do Sul, Brazil. The studied populations presented genetic variability for cycle, insertion of the first pod, grain yield, and potassium, phosphorus and zinc concentrations in grains. Heritability estimates and selection gain of intermediate and high magnitude were obtained for cycle, insertion of the first pod, grain yield, and potassium concentration in grains in P 2 . In P 4 , insertion of the first pod, grain yield and phosphorus and zinc concentrations in grains presented high heritability and selection gain estimates. From the tested crossings, it is possible to select common bean inbred lines biofortified for potassium, phosphorus and zinc and with high agronomic performance.

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“…Grain yield was determined by extrapolating the weight of the product obtained in each plot per hectare. As the plant stands were heterogeneous, it was necessary to adjust the plant stands for grain yield in all experimental units by the covariance -ideal stand method (Schmildt et al, 2001).…”

Section: Evaluation Of Agronomic and Mineral Biofortification Traits mentioning

confidence: 99%

Genetic dissimilarity of common bean lines for agronomic and biofortification traits

Maziero¹,

Ribeiro²,

Casagr³

2017

Genet. Mol. Res.

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ABSTRACT. The evaluation of the genetic dissimilarity of common bean lines obtained by the breeding program is significant to identify duplicate accessions, to select superior lines, and to plan new hybrid combinations. The objectives of this study were to evaluate the genetic dissimilarity of common bean genotypes for agronomic and mineral biofortification traits, select superior lines, and identify promising hybrid combinations for biofortification programs. For this purpose, 169 common bean genotypes (F 6:8 inbred lines and parental cultivars) were evaluated in two experiments conducted in a simple lattice design in Santa Maria-RS, Brazil. The following agronomic traits were evaluated: insertion of the first pod, insertion of the last pod, cycle, mass of 100 grains, grain yield, and concentrations of potassium, phosphorus, zinc, and copper in grains. The genotypes assessed presented genetic variability for all traits, except for copper concentration in grains. The traits that showed the highest contribution to the genetic dissimilarity were the concentrations of phosphorus, potassium, and zinc in grains. In cluster analyses, six groups by principal components and 33 groups by the Tocher optimization method were identified. These methods partially agreed in the formation of different groups of common bean genotypes. Controlled crossings between the lines 17 and 162 with lines of groups XX, XXI, XXIV, and XXXIII are recommended to obtain recombinants with high grain yield and biofortified for phosphorus, potassium, and zinc.

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Avaliação de métodos de correção do estande para estimar a produtividade em milho

Cited by 26 publications

References 3 publications

Use of Organic Compost Containing Waste from Small Ruminants in Corn Production

Use of Organic Compost Containing Waste from Small Ruminants in Corn Production

Genetic parameters of agronomic and nutritional traits of common bean (Phaseolus vulgaris L.) populations with biofortified grains

Genetic dissimilarity of common bean lines for agronomic and biofortification traits

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