EFFECTS OF PLANT DENSITY ON THE YIELD, MATURITY AND GRAIN CONTENT OF WHOLE-PLANT MAIZE

To study the effect of increases in plant density on the dry matter (DM) yield, percentage grain and percentage DM content of whole-plant maize (Zea mays L.), 12 tests were established over a 3-yr period in Central and Southern Ontario. Each test involved three adapted hybrids grown at 50 000, 63 000 and 75 000 plants/ha in 1976, and at these three densities plus 92 000 plants/ha in 1977 and 1978. No hybrid-by-density interaction for DM yield occurred in any test, and the density response was similar for most tests. Maximum DM yield was generally attained once density increased to 63 000 plant/ha. Plant population had a negligible effect on the grain percentage of DM content of forage up to 75 000 plants/ha. Optimum density for DM yield was much lower than expected, given the small stature (i.e., leaf area/plant) of adapted hybrids grown in most of Ontario.

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CORN YIELD RESPONSE TO IRRIGATION, PLANT POPULATION AND NITROGEN IN A COOL, HUMID CLIMATE

Canadian Journal of Plant Science ◽

10.4141/cjps86-063 ◽

1986 ◽

Vol 66 (3) ◽

pp. 453-464 ◽

Cited By ~ 7

Author(s):

D. M. BROWN

Keyword(s):

Zea Mays ◽

Soil Moisture ◽

Zea Mays L ◽

Plant Density ◽

Plant Population ◽

Yield Response ◽

Corn Yield ◽

Subsequent Paper ◽

Southern Ontario ◽

High Plant Density

Summer dry spells in some areas of southern Ontario during the last decade have increased interest in supplemental irrigation. Field studies were conducted in a 2500 heat unit area of southern Ontario on Orthic/Brunisolic Grey Brown Luvisol soils to determine the yield response of field corn (Zea mays L.) to irrigation in midsummer when combined with increased plant density and N rates. The yield responses, phenological records and soil moisture measurements are to be used in the calibration and validation of a corn yield estimation model, to be published in a subsequent paper. Two to four irrigations were applied each year using the line method when soil moisture pressure potential reached −40 to −60 kPa at 22.5 cm depth. Development stages were unaffected by irrigation. Yield increases from irrigation were directly proportional to water applied in midsummer and the intensity of dry weather. Yields increased with plant density in 4 of the 5 yr and were usually consistent over irrigation levels. Additional nitrogen above the recommended rate increased yields in 1982 and 1983, decreased yields in 1981, and resulted in no differences the other two years. In years of positive response to extra nitrogen, there was usually a greater response with irrigation and the responses were greatest at high plant density and for the longer season hybrids. Harvest indices decreased as irrigation amount increased and were exceptionally high in 1983.Key words: Corn, Zea mays L., line-source irrigation, plant population, nitrogen, harvest index

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Effect of fertilization and plant density on the dry matter production of two maize (Zea mays L.) hybrids

Cereal Research Communications ◽

10.1007/bf03543560 ◽

1999 ◽

Vol 27 (4) ◽

pp. 433-438

Author(s):

A. Megyes ◽

A. Dobos ◽

T. Rátonyi ◽

L. Huzsvai

Keyword(s):

Zea Mays ◽

Dry Matter ◽

Zea Mays L ◽

Plant Density ◽

Dry Matter Production ◽

Matter Production

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The effect of different sowing densities and nutrient levels on leaf area index, production and distribution of dry matter in maize (zea mays l.)

Biologia Plantarum ◽

10.1007/bf02922756 ◽

1973 ◽

Vol 15 (6) ◽

pp. 374-382 ◽

Cited By ~ 3

Author(s):

J. Vidovič ◽

V. Pokorný

Keyword(s):

Zea Mays ◽

Leaf Area Index ◽

Leaf Area ◽

Dry Matter ◽

Zea Mays L ◽

Area Index ◽

Nutrient Levels ◽

Production And Distribution

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Grain Yield Potential of Some Diverse Maize (Zea mays L.) Morphotypes Intercropped with Cocoyam (Xanthosoma sagittifolium)

Experimental Agriculture ◽

10.1017/s0014479700012424 ◽

1985 ◽

Vol 21 (2) ◽

pp. 145-152 ◽

Cited By ~ 4

Author(s):

J. A. Ayuk-Takem ◽

H. R. Chhedda

Keyword(s):

Zea Mays ◽

Zea Mays L ◽

Plant Density ◽

Plant Population ◽

Yield Potential ◽

Maize Cultivars ◽

Xanthosoma Sagittifolium ◽

Maize Yields ◽

Maize Plants ◽

Erect Leaves

SUMMARYThree maize cultivars, BACOA, SAW and COCA, were evaluated when intercropped with cocoyams at a density of 50 000 maize plants and 10 000 cocoyam stands ha−1. BACOA which matures in 120 days, and SAW (130 days) transmitted significantly more light to the lower canopy than COCA, which has spreading leaves and matures in 150 days. Relative yields for BACOA, SAW and COCA in pure stands were 72, 100 and 85%, respectively, while those for cocoyams in BACOA/cocoyam, SAW/cocoyam and COCA/cocoyam mixtures were 82, 58 and 54%, respectively, showing that COCA significantly suppressed the yield of cocoyam when intercropped.Yields of a COCA type with erect leaves increased as plant density increased from 20 000 to 50 000 plants ha−1 in pure stands, while yields of COCA with spreading leaves increased as plant density increased from 20 000 to 40 000 plants ha−1 but decreased when plant population increased to 50 000 plants ha−1. When COCA with erect leaves was intercropped with cocoyams, cocoyam tuber yields were fairly stable and maize yields continued to increase significantly as plant density increased from 20 000 to 50 000 plants ha−1, whereas the yields of COCA with spreading leaves and cocoyams were greatly reduced when intercropped and when the plant population increased from 20 000 to 50 000 plants ha−1.

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Genetic analysis of leaf morphology underlying the plant density response by QTL mapping in maize (Zea mays L.)

Molecular Breeding ◽

10.1007/s11032-016-0483-x ◽

2016 ◽

Vol 36 (5) ◽

Cited By ~ 12

Author(s):

Lixia Ku ◽

Zhenzhen Ren ◽

Xiao Chen ◽

Yong Shi ◽

Jianshuang Qi ◽

...

Keyword(s):

Zea Mays ◽

Genetic Analysis ◽

Qtl Mapping ◽

Leaf Morphology ◽

Zea Mays L ◽

Plant Density ◽

Density Response

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Inheritance of Plant and Ear Height in Maize (Zea Mays L.)

Acta Agraria Debreceniensis ◽

10.34101/actaagrar/8/3548 ◽

2002 ◽

pp. 34-38 ◽

Cited By ~ 5

Author(s):

Zsuzsanna Zsubori ◽

Zsuzsanna Gyenes-Hegyi ◽

Ottó Illés ◽

István Pók ◽

Ferenc Rácz ◽

...

Keyword(s):

Zea Mays ◽

Grain Yield ◽

Plant Height ◽

Dry Matter ◽

Zea Mays L ◽

Plant Density ◽

Pests And Diseases ◽

Stover Yield ◽

Ear Height ◽

Positive Correlations

Plant and ear height are very important characters not only for describing new varieties of maize (Zea mays L.), but for green and dry matter production, and even for grain yield. Significant positive correlations have been reported by various authors between plant height and stover yield, plant height and dry matter yield, and plant height and grain yield. The height of the main ear is also correlated to plant height. It depends on the variety or the environment, but is likely to be the same height within a population. Many environmental and agronomical factors (e.g. plant density, fertilization, pests and diseases) influence the expression of these characters, which are not quality traits. Their expression is controlled by many genes and by the interactions between these genes. The heritability of these traits is high and they show significant genotypic variability and positive heterosis, as reported in many research publications.

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ÉPOCAS DE SEMEADURA DE MILHO NA REGIÃO NORTE DE MATO GROSSO

Nativa ◽

10.31413/nativa.v6i3.5471 ◽

2018 ◽

Vol 6 (3) ◽

pp. 241

Author(s):

Cassiano Spaziani Pereira ◽

Ezequel Giese ◽

Ivan Vilela Andrade Fiorini ◽

Anderson Lange

Keyword(s):

Zea Mays ◽

Water Content ◽

Leaf Area ◽

Relative Water Content ◽

Dry Matter ◽

Zea Mays L ◽

Block Design ◽

Mato Grosso ◽

The North ◽

Relative Water

Existem poucas informações sobre a melhor época de semeadura de milho, durante o período da “segunda safra” no norte de Mato Grosso. O objetivo do trabalho foi verificar o comportamento produtivo de três híbridos de milho, semeados em seis épocas, durante a “segunda safra,” ou “safrinha”, no norte de Mato Grosso, Sinop-MT. O experimento foi conduzido em um Latossolo Vermelho Amarelo distrófico típico argiloso, entre janeiro e julho de 2014. O delineamento experimental foi em blocos ao acaso, com quatro repetições em esquema fatorial 3 x 6. Utilizou-se três híbridos comerciais simples e “precoces”: Maximus®; Truck (Syn7316)® e Status (Syn7205)®. As épocas de semeadura ocorreram aos 0, 7, 14, 21, 28 e 35 Dias após a semeadura de 26/01, correspondendo as datas de 26/01; 02/02; 09/02; 16/02; 23/02 e 02/03 de 2014, respectivamente. Avaliou-se a altura de plantas, área foliar, massa seca, teor relativo de água e produtividade da cultura. No florescimento, os menores teores de água nas folhas ocorreram nas plantas semeadas entre os dias 16/02 e 23/02. O crescimento vegetativo do milho foi o menor na época de semeadura entre os dias 09/02 a 23/02. Os híbridos Truck®, Máximus® e Status® não apresentaram diferença de produtividade e são mais produtivos quando semeados no final do período de segunda safra, entre os dias 16/02 a 02/03.Palavras-chave: Zea mays L, milho segunda safra, matéria seca, área foliar, teor relativo de água. MAIZE SEED TIMES IN THE NORTH REGION OF MATO GROSSO ABSTRACT:Were not sufficient information’s about the best time sowing of corn crop, during period of maize off-season in the north of Mato Grosso. The objective of this work was to verify the productive behavior of three maize hybrids, sown in six seasons, during the "second harvest," in the north of Mato Grosso, Sinop-MT. The experiment was conducted in a typical clayey dystrophic Yellow Red Latosol between January and July 2014. The experimental design was a randomized complete block design with four replicates in a 3 x 6 factorial scheme. Three commercial hybrids were used: Maximus®; Truck (Syn7316) ® and Status (Syn7205) ®. Sowing times occurred on day after sowing of date based of 01/26; respectively for datas: 01/26; 02/02; 09/02; 16/02; 23/02 and 02/03 of 2014. The variables analyzed the height of plants, stem diameter, leaf area, dry matter, relative water content and crop productivity were evaluated. At flowering, the lowest leaf water contents occurred in the plants sown between February 16 and February 23. The maize vegetative growth was the lowest in the sowing season between 09/02 to 23/02. The Hybrids Truck, Maxima and Status had a productivity difference and are more productive when sown at the end of the second crop period, between February 16 to March 2.Keywords: Zea mays L., maize off-season, dry matter, leaf area, relative water content. DOI:

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