&lt;b&gt;Harvest time and agronomic performance of maize hybrids with contrasting growth cycles

Panison, Fernando; Sangoi, Luís; Kolling, Daniel Fernando; Coelho, Cileide Maria Medeiros; Durli, Murilo Miguel

doi:10.4025/actasciagron.v38i2.27901

Cited by 9 publications

(11 citation statements)

References 7 publications

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“…However, a long delay in maize harvesting may cause quantitative and qualitative losses to the grain yield, due to physiological and morphological factors such as development of ear rots, plant lodging, or animal attacks [42,43]. High grain yield and good seed quality are obtained when the harvest is carried out after physiological maturity of the plants [43][44][45][46]. Gaile [47] reported the dry moisture content of maize (min 25%, optimum 28-30%) as the main criterion for determination of proper harvesting time.…”

Section: Maize Harvest and Shelling Percentagementioning

confidence: 99%

Estimation of Maize (Zea mays L.) Yield Per Harvest Area: Appropriate Methods

Tandzi

Mutengwa

2019

Agronomy

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Standardization of crop yield estimation methods at various levels of farming helps to obtain accurate agricultural statistics as well as assessing the suitability of agricultural practices under various production conditions. The current paper reviews various maize yield estimation methods, taking into account available yield parameters, and it also analyses the yield gap between maize potential and attainable yield. The easiest and more reliable methods of yield estimation are based on yield parameters collected from the field. However, farmer estimation methods are cheaper and faster compared to any other method of yield estimation from farmers’ fields. This paper also elaborates on the importance of the use of more complex methods for yield estimation, such as remote sensing and crop modelling. These complex methods are more accurate and can predict yield before field harvest with less deviation from the exact harvest yield. However, they are very expensive and not efficient for small plots of land (less than 1 ha). Factors that contribute to the gap between potential and actual yield include poor implementation of agricultural policies, strict regulation of fertilizer inputs, vulnerability of smallholder cropping systems to adverse climatic conditions, occurrence of biotic and abiotic constraints, as well as unavailability of seeds and labor.

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Section: Maize Harvest and Shelling Percentagementioning

confidence: 99%

Estimation of Maize (Zea mays L.) Yield Per Harvest Area: Appropriate Methods

Tandzi

Mutengwa

2019

Agronomy

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“…At physiological maturity of maize, the plant allocates more than 50% of its biomass to grains (Panison et al 2016), and mean temperatures below 20°C during November in Pakistan negatively affect crop growth and productivity by inducing a number of molecular, morphological, and physiological changes. Low temperatures during day and especially night influence chloroplast structure and photosynthetic efficiency with poorly developed thylakoid structures, reduced Calvin cycle activity, and restricted metabolite transport (Sowiński et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Exogenous application of plant growth regulators (PGRs) induces chilling tolerance in short-duration hybrid maize

Waqas

Khan

Akhter

et al. 2017

Environ Sci Pollut Res

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Chilling stress hampers the optimal performance of maize under field conditions precipitously by inducing oxidative stress. To confer the damaging effects of chilling stress, the present study aimed to investigate the effects of some natural and synthetic plant growth regulators, i.e., salicylic acid (SA), thiourea (TU), sorghum water extract (SWE), and moringa leaf extract (MLE) on chilling stress tolerance in autumn maize hybrid. Foliar application of growth regulators at low concentrations was carried out at six leaf (V6) and tasseling stages. An increase in crop growth rate (CGR), leaf area index (LAI), leaf area duration (LAD), plant height (PH), grain yield (GY), and total dry matter accumulation (TDM) was observed in exogenously applied plants as compared to control. In addition, improved physio-biochemical, phenological, and grain nutritional quality attributes were noticed in foliar-treated maize plots as compared to non-treated ones. SA-treated plants reduced 20% electrolyte leakage in cell membrane against control. MLE and SA were proved best in improving total phenolic, relative water (19-23%), and chlorophyll contents among other applications. A similar trend was found for photosynthetic and transpiration rates, whereas MLE and SWE were found better in improving CGR, LAI, LAD, TDM, PH, GY, grains per cob, 1000 grain weight, and biological yield among all treatments including control. TU and MLE have significantly reduced the duration in phenological events of crop at the reproductive stage. MLE, TU, and SA also improved the grain protein, oil, and starch contents as compared to control. Enhanced crop water productivity was also observed in MLE-treated plants. Economic analysis suggested that MLE and SA applications were more economical in inducing chilling stress tolerance under field conditions. Although eliciting behavior of all growth regulators improved morpho-physiological attributes against suboptimal temperature stress conditions, MLE and SA acted as leading agents which proved to be better stress alleviators by improving plant physio-biochemical attributes and maize growth.

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“…Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 4.0 International License kernel germination at the ear and insect attack (Panison et al, 2016). These effects are more intense when maize is grown after plants of the same botanical family, such as black oat (Avena sativa).…”

Section: Introductionmentioning

confidence: 99%

“…When this situation occurs, growers harvest soybean first because it is more profitable and more sensitive to harvest delay (Cella et al, 2014). Many times, such decision forces maize to stay in the field for over 30 days after grain physiological maturity (Panison et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Harvest time, stem and grain sensibility of maize hybrids with contrasting growth cycles

Panison¹,

Sangoi²,

Casa³

et al. 2016

Afr. J. Agric. Res.

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The delay of maize harvest may affect the stem and grain sanity. This work was carried out aiming to evaluate the effects of harvest time on the incidence of stem rots and rotten grains of maize hybrids with contrasting growth cycles. The experiment was set in Lages, SC, during the 2012/2013 and 2013/2014 growing seasons. A randomized block design, disposed in split plots was used. Five singlecross hybrids were tested in the main plots: P1630H and P32R22H (hipper early cycle), P2530 (super early cycle) and P30F53YH and P30R50YH (early cycle). Five harvest times were assessed in the split plots: 0 (grain physiological maturity), 10, 20, 30 and 40 days after physiological maturity. The incidence of stem rots increased proportionally to the delay in harvest time, regardless of hybrid growth cycle. More than 60% of the stems presented rot symptoms when harvest was performed 30 and 40 days after physiological maturity. Such behavior enhanced the percentage of lodged and broken stems when harvest was postponed. Harvest time did not affect the percentage of rotten grains, which was higher for hybrid P32R22H due to its poor ear husk coverage. Harvest delay affected more significantly the stem than grain sanity of maize hybrids.

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<b>Harvest time and agronomic performance of maize hybrids with contrasting growth cycles

Cited by 9 publications

References 7 publications

Estimation of Maize (Zea mays L.) Yield Per Harvest Area: Appropriate Methods

Estimation of Maize (Zea mays L.) Yield Per Harvest Area: Appropriate Methods

Exogenous application of plant growth regulators (PGRs) induces chilling tolerance in short-duration hybrid maize

Harvest time, stem and grain sensibility of maize hybrids with contrasting growth cycles

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