Densidade de plantas em híbridos de milho semeados no final do inverno em ambientes irrigados e de sequeiro

Serpa, Michael da Silva; Silva, Paulo Regis Ferreira da; Sangoi, Luís; Vieira, Vladirene Macedo; Marchesi, Darlan Rodrigo

doi:10.1590/s0100-204x2012000400010

Cited by 21 publications

(23 citation statements)

References 12 publications

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“…This value was 15% higher compared with irrigation only during critical periods of the culture, which produced an average of 406 grains per ear. Serpa et al (2012) also found that the NGE decreased linearly with an increase in the density of plants, for two of the four hybrids tested, partially corroborating the results observed in our study.…”

Section: Resultssupporting

confidence: 91%

“…At a density of four plants per m -2 (D1), the highest NGE was observed at an irrigation level of 75% of Et c . Serpa et al (2012) compared the density of hybrid plants, with full irrigation during critical periods of culture, and observed that the NGE was positively affected by irrigation in the first year of the study. They also observed an average of 469 grains per ear for the fully irrigated treatment over the two years of the study.…”

Section: Resultsmentioning

confidence: 99%

“…The decrease in the MCG with increasing plant density can be attributed to increased intra-specific competition for resources available in the environment (SERPA et al, 2012). In addition, the increase in plant density leads to a smaller mass of individual dry matter in plants, which may have contributed to the smaller mass of grains, due to a reduced supply of photoassimilates to developing grains.…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, Beiragi et al (2011) observed a reduction of 71.54% in grain yield when the fraction of soil water depletion reached 80%. Serpa et al (2012) studied maize hybrids at a range of densities between 5 and 11 plants per m -2 , using full irrigation during critical periods of the culture, and found that, based on the average of hybrids, a linear increment in the growth of plants in the population. With full irrigation management, they observed maximum productivity of 16.3 t ha -1 , at a plant density of 11 plants per m -2 , a 31% higher yield than for the plant density of five plants per m -2 .…”

Section: Resultsmentioning

confidence: 99%

“…There are several causes of a low crop yield, in particular insufficient availability of water and nutrients in the soil, incorrect soil management, and inappropriate sowing density (SILVA et al, 2003). According to Serpa et al (2012), to achieve high yield of maize grain (Zea mays L.), it is necessary to adapt management practices to the resources available in each cultivation environment to provide the best conditions for plant development.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

et al. 2016

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-This study assessed the effect of different irrigation levels and plant densities on maize crops cultivated during the second season in the Western Border region of the State of Rio Grande do Sul. This work was conducted at the Federal Institute of Farroupilha -Alegrete Campus/RS -between January and June 2014. Treatments were arranged in a completely randomized 5 × 4 factorial design, with 3 replicates each. Irrigation of fixed amounts of water that were based on the evapotranspiration of the culture (Et c ): 0, 50, 75, 100, and 125% of Et c were applied at 5-day intervals. Four densities of plants were defined (4, 7, 10, and 13 plants m -2 ). We assessed number of maize ears per plant, number of grains per ear, aboveground dry matter, mass of 100 grains, harvest index, and grain productivity. The number of grains per ear, mass of 100 grains, and grain yield were influenced by irrigation levels. Plant density and water depth influenced the number of grains per ear, the mass of 100 grains, and grain productivity. The highest yield of winter maize grain was achieved with a combination of 13 plants per m -2 and an irrigation level of 100% of Et c . Specific densities of plants maximized the yield of maize at each irrigation level, demonstrating that choice of plant density is a critical variable in the second crop of maize, and significantly influences the components of production.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

et al. 2016

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Economic analysis of irrigation in the production system of soybean and second‐season maize in sandy soil areas in Brazil

Gava

Campos²,

Coelho³

et al. 2022

Irrigation and Drainage

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The objective of the present work was to perform an economic analysis of centre-pivot irrigation implantation on a sandy soil area with different previous land uses. Thus, it was possible to analyse three initial soil conditions inside (irrigated) and outside (rainfed) the centre pivot. The opening area (P1) was characterized by soybean planting for the first time after degraded pasture, P2 consisted of the second year of harvesting soybean/maize second season, and P3 consisted of the third year of harvest. Two crops were evaluated: soybean and maize. The centre-pivot irrigation system was not profitable at the earliest stage of soil recovery (P1) immediately after degraded pasture because soil fertility limited yields. There was a 23% and 33% increase in soybean yield for the areas with 2 years (P2) and 3 years (P3) of soil recovery, respectively, compared to the first year. However, second-season maize had an increased yield of 19% for the third-year area (P3) compared to the first year (P1).

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Corn agronomic characteristics according to crop year, spacing and plant population densities

et al. 2016

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The present study aimed to evaluate the influence of row spacing, plant density, crop year and yield in crop agronomic parameters in a ‘Cerrado’ area in Brazil. The experiments were conducted during the 2010/2011 and 2011/2012 crop years, at an experimental Farm of the IF Goiás Campus Ceres, located in the city of Ceres, Goiás, Brazil. The experiment was conducted in a complete randomized block design in a 2x3x2 factorial (two crop years: 2010/2011 and 2011/2012, three population densities: 60,000, 70,000 and 80,000 plants ha-1 and two spacing: 0.50 and 0.80 m) with four repetitions, totaling 48 plots. The observed values for plant height and cob height were higher for the 2011/2012 season with values of 2.56 and 1.26 m, respectively. The cob diameter was higher for the 2011/2012 crop year with a value of 51.92 mm. The yield was higher for the 2010/2011 harvest. Increasing plant population and reducing row spacing can lead to an increase on the grain yield due to better spatial distribution of plants per area, fact observed mainly during the 2010/2011 crop year. Corn maintains high productivity with spacing of 0.50 and 0.80m. Increases in plant density can lead to increase on yield. Increasing plant population reduced the corn stem diameter.

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Densidade de plantas em híbridos de milho semeados no final do inverno em ambientes irrigados e de sequeiro

Cited by 21 publications

References 12 publications

Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

Influence of Irrigation Levels and Plant Density on "Second-Season" Maize

Economic analysis of irrigation in the production system of soybean and second‐season maize in sandy soil areas in Brazil

Corn agronomic characteristics according to crop year, spacing and plant population densities

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