scholarly journals Plant population and row spacing effects on corn: Plant growth, phenology, and grain yield

2020 ◽  
Vol 112 (4) ◽  
pp. 2456-2465 ◽  
Author(s):  
Brad J. Bernhard ◽  
Frederick E. Below
Keyword(s):  
Plant Growth ◽  
Grain Yield ◽  
Plant Population ◽  
Row Spacing ◽  
Corn Plant ◽  
Spacing Effects

scholarly journals Increasing population density reduces soybean yield components and productivity

2021 ◽  
Vol 37 ◽  
pp. e37042
Author(s):  
Marcelo De Almeida Silva ◽  
Ana Carolina De Santana Soares ◽  
Melina Rodrigues Alves Carnietto ◽  
Alexandrius De Moraes Barbosa
Keyword(s):  
Grain Yield ◽  
Yield Components ◽  
Spatial Arrangement ◽  
Plant Population ◽  
Row Spacing ◽  
Individual Plant ◽  
Growth Type ◽  
Soybean Yield ◽  
Plant Densities ◽  
Plant Yields

Studies addressing the interaction of different spatial arrangement in soybean are needed in order to achieve management that leads to higher grain yield associated with rational seed use. The objective of this work was to evaluate the yield components and productivity of an undetermined growth type soybean as a function of different row spacing and plant densities. The treatments consisted of three row spaces (0.25, 0.35 and 0.45 m) and three plant population densities (30, 40 and 50 plants/m²). There was no interaction of row spaces and plant population on soybean yield. Regarding the overall spacing average, the grain yield of the population of 30/m² plants was higher than the productivity of the populations of 40 and 50/m² plants. The largest populations reduce plant sizes due to greater competition between plants. In addition, smaller populations promote higher individual plant yields due to the increase components of the production. This characteristic is defined as the ability of the plant to change its morphology and yield components in order to adapt to the conditions imposed by the spatial arrangement.

Managing yield reductions from wide row spacing in wheat

2006 ◽  
Vol 46 (10) ◽  
pp. 1313 ◽  
Author(s):  
M. Amjad ◽  
W. K. Anderson
Keyword(s):  
Grain Yield ◽  
Grain Quality ◽  
Wheat Yield ◽  
Application Rate ◽  
Row Spacing ◽  
Spacing Effects ◽  
Weed Growth ◽  
Wide Row Spacing ◽  
Average Plant ◽  
Narrow Row

Experiments were conducted to investigate row spacing effects on wheat yield and grain quality and the interactions between row spacing and cultivars, plant population density, nitrogen application rate, time of sowing, fertiliser placement and row spread from 2000 to 2002 in the south coast region of Western Australia. In the experiments that were conducted following pasture or lupins, wider row spacings of 240 and 360 mm consistently reduced wheat yield and increased grain protein and small grain screenings compared with a narrow row spacing of 180 mm. Average plant numbers were reduced in the wider rows in all experiments. This result, possibly related to increased competition for water as the seeds were placed closer together in the wide rows, may also have been related to reductions in wheat grain yield. The yield decline in wider rows was lowest for the long season cultivar Camm with a May sowing in 1 experiment and at the higher N rate in another experiment. The response of Camm at wider row spacings can be partially explained by its higher dry matter production as measured in 2000 and may also help to explain the observed advantage of Camm in suppressing weed growth at all row spacings. In 2002, the row spread (seed width within the row) was varied from normal 25 mm widths to 50 and 75 mm widths. Yield was increased at the widest row spacing (360 mm) by using the wider row spreads of 50 or 75 mm. Fertiliser placement methods significantly affected plant establishment but not grain yield. Grain quality (protein percentage, small grain screenings and hectolitre weight) was reduced in wider rows in some cases or unaffected in others. This research has demonstrated that yield reductions due to wide row spacing can be minimised by using a long season cultivar when sown in May, by using adequate N fertiliser and by increasing the spread of seed across the row.

scholarly journals AGRONOMIC CHARACTERISTICS OF CORN GROWN IN DIFFERENT POPULATION ARRANGEMENTS

Nativa ◽  
2018 ◽  
Vol 6 (6) ◽  
pp. 569
Author(s):  
Marcos Felipe de Brito Ventura ◽  
Flávio Carlos Dalchiavon
Keyword(s):  
Zea Mays ◽  
Regression Analysis ◽  
Dry Mass ◽  
Plant Population ◽  
Row Spacing ◽  
Agronomic Performance ◽  
Corn Plant ◽  
Mato Grosso ◽  
Reproductive Characteristics ◽  
Lower Variation

CARACTERÍSTICAS AGRONÔMICAS DE MILHO CULTIVADO EM DIFERENTES ARRANJOS POPULACIONAIS Objetivou-se determinar a resposta de diferentes arranjos populacionais sobre o desempenho agronômico do milho. O experimento foi realizado no Instituto Federal de Educação, Ciência e Tecnologia de Mato Grosso (IFMT),Campo Novo do Parecis O delineamento experimental foi o de blocos casualizados, em esquema fatorial 5 x 2, sendo cinco populações do híbrido simples DKB 390 VT PRO3 (50.000; 60.000; 70.000; 80.000 e 90.000 plantas ha-1) e dois espaçamentos entre linhas (0,45 e 0,90 m), com quatro repetições. Foram avaliadas características vegetativas e reprodutivas do milho. Os dados obtidos foram submetidos à análise de variância e análise de regressão. O aumento na população de plantas do milho incrementa a massa verde e a massa seca ao mesmo tempo em que reduz a massa de mil grãos (80.000 plantas ha-1), comprimento e diâmetro de espigas e número de fileiras por espiga de milho. O reduzido espaçamento entre linhas (0,45 m) e a população de 50.000 plantas ha-1 apresentaram os melhores resultados para as características reprodutivas, com menor variação de comportamento entre as populações avaliadas.Palavras-chave: desempenho agronômico, espaçamento entre plantas, população de plantas, Zea mays. ABSTRACT: The objective of this study was to determine the response of different population arrangements on the agronomic performance of corn. The experiment was carried out in Instituto Federal de Educação, Ciência e Tecnologia de Mato Grosso (IFMT), Campo Novo do Parecis. The experimental design was a complete randomized block in a 5 x 2 factorial scheme, with five populations of single hybrid DKB 390 VT PRO3 (50,000, 60,000, 70,000, 80,000 and 90,000 plants ha-1) and two row spacings (0.45 and 0.90 m) with four replications. The experiment evaluated the vegetative and reproductive characteristics of corn. Data were submitted to analysis of variance and regression analysis. The raise in corn plant population increases the fresh mass and the dry mass while reducing the mass of a thousand grains (80,000 plants ha-1), length and diameter of the ears and number of rows per corn ear. The reduced row spacing (0.45 m) and the population of 50,000 ha-1 plants presented the best results for reproductive characteristics, with lower variation in behavior among the populations evaluated in the experiment.Keywords: agronomic performance, plant population, spacing between plants, Zea mays.

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