Morphological Characteristics of Maize Canopy Development as Affected by Increased Plant Density

Song, Youhong; Rui, Yukui; Bedane, G.M.; Li, Jincai

doi:10.1371/journal.pone.0154084

Cited by 30 publications

(36 citation statements)

References 26 publications

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“…This suggested that as plant density increases, increased interplant competition restricts the growth of reproductive sink capacity (Hashemi, Herbert, & Putnam, ; Sarlangue, Fernando, Andrade, Calviñ, & Purcell, ; Vega, Andrade, Sadras, Uhart, & Valentinuz, ; Westgate, Forcella, Reicosky, & Somsen, ), thereby resulting in smaller cobs, increased barrenness and hence lower yields. Interplant competition also shown to affect plants organ growth and development (Song, Rui, Bedane, & Li, ) may have also impact on plant productivity.…”

Section: Discussionmentioning

confidence: 99%

Risks of yield loss due to variation in optimum density for different maize genotypes under variable environmental conditions

Solomon

Chauhan²,

Zeppa³

2017

J Agronomy Crop Science

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Understanding the nature of complex genotype‐by‐environment‐by‐management interactions is crucial to identify risks and opportunities for increasing maize yield and profitability in rainfed production systems. The objectives of this study were to (i) define the conditions where hybrids of different maturity and plant densities are viable options in terms of improving productivity, and (ii) quantify the risk levels associated with different genotype‐by‐management combinations in relation to target environments. Responses to plant density were analysed on field experimentation with different genotypes representing early, medium and late maturity types and 2, 4 and 6 plant/m2 plant densities at three major or potential dryland maize production environments in Queensland, Australia. Agricultural Production Systems sIMulator (APSIM)‐Maize module was employed to simulate yield responses and compute the cumulative probability distribution. APSIM simulations suggested that the risk of expecting a yield level less than 2 t/ha increased up to about 17 and 27% for quick and late maturing types, respectively, when density increased to 10 plants/m2 in marginal environments such as Emerald. In relatively better environments, however the risk increased only up to 10% for late hybrids, and 7% for a quick hybrid at 10 plants/m2. In both high and low potential environments, choice of hybrids and plant densities should be based on seasonal weather forecasts to minimize risks and maximize opportunities for higher yields.

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Section: Discussionmentioning

confidence: 99%

Risks of yield loss due to variation in optimum density for different maize genotypes under variable environmental conditions

Solomon

Chauhan²,

Zeppa³

2017

J Agronomy Crop Science

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“…Whole plant canopy level effects indicated that through local responses that may vary with positions in different types of organs [28, 34,35]. For example, the effect of plant density on leaf area expansion through two parts i.e., lamina length and lamina width, the first being consistently decreased in both lower and upper phytomers [36] whereas the second being increased in lower phytomers and decreased in upper phytomers [37]. Increasing panting density accelerated leaf senescence [38], increased the shading of leaves [18], and reduced the net assimilation of individual plants.…”

Section: Plant Density Effect On Canopy Morphology Of Maize Cropmentioning

confidence: 99%

Response of Maize Grown Under High Plant Density; Performance, Issues and Management - A Critical Review

Sher¹,

Khan²,

Cai³

et al. 2017

Adv Crop Sci Tech

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Modern cropping is based on relatively high plant density. The improved grain yield per unit area of modern maize (Zea mays L.) hybrids is due to the increased optimum plant population rather than the improved grain yield per plant. High plant density has been widely used to enhance grain yield in maize. Subsequently we review the effect of planting density on physiology, phenology, morphology, nitrogen use efficiency, water use efficiency grain yield information in maize crop. At higher plant populations reduced grain yield also results from the increased pollento-silking interval and the following barrenness. However, it may lead to higher risk lodging hence causing significant yield loss of the crop. Future insights are morphological and physiological basis controlling barren and stalk lodging resistance. How root traits, and anatomy of sheath and stem of maize plants correspond to high plant population and a further study on the physiological and biological basis of organ development that may govern the mechanisms of high plant density would be essential for future research.

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“…Differential effects on leaf length and leaf width have been observed in response to plant density in maize (Sonohat & Bonhomme ). Furthermore, leaf width variations have been shown to closely match the decrease in light interception per plant with plant density (Fournier et al ), whereas leaf length may respond positively or negatively to increased density depending on leaf rank (Sonohat & Bonhomme ; Song et al ). This suggests independent effects of light and water limitations.…”

Section: Introductionmentioning

confidence: 99%

Distinct controls of leaf widening and elongation by light and evaporative demand in maize

Lacube

Fournier

Palaffre³

et al. 2017

Plant Cell & Environment

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Leaf expansion depends on both carbon and water availabilities. In cereals, most of experimental effort has focused on leaf elongation, with essentially hydraulic effects. We have tested if evaporative demand and light could have distinct effects on leaf elongation and widening, and if short-term effects could translate into final leaf dimensions. For that, we have monitored leaf widening and elongation in a field experiment with temporary shading, and in a platform experiment with 15 min temporal resolution and contrasting evaporative demands. Leaf widening showed a strong (positive) sensitivity to whole-plant intercepted light and no response to evaporative demand. Leaf elongation was (negatively) sensitive to evaporative demand, without effect of intercepted light per se. We have successfully tested resulting equations to predict leaf length and width in an external dataset of 15 field and six platform experiments. These effects also applied to a panel of 251 maize hybrids. Leaf length and width presented quantitative trait loci (QTLs) whose allelic effects largely differed between both dimensions but were consistent in the field and the platform, with high QTL × Environment interaction. It is therefore worthwhile to identify the genetic and environmental controls of leaf width and leaf length for prediction of plant leaf area.

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Morphological Characteristics of Maize Canopy Development as Affected by Increased Plant Density

Cited by 30 publications

References 26 publications

Risks of yield loss due to variation in optimum density for different maize genotypes under variable environmental conditions

Risks of yield loss due to variation in optimum density for different maize genotypes under variable environmental conditions

Response of Maize Grown Under High Plant Density; Performance, Issues and Management - A Critical Review

Distinct controls of leaf widening and elongation by light and evaporative demand in maize

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