The impact of source restriction on yield formation of corn (Zea mays L.) due to water deficiency

Oveysi, Meysam; Mirhadi, Mohammad Javad; Madani, H; Ghorban, Nourmohammadi; Zarghami, Reza; Madani, Ali

doi:10.17221/86/2010-pse

Cited by 12 publications

(9 citation statements)

References 14 publications

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“…The coefficient in all the treatments (T1-T5) was smaller than that in CK by as much as 50% in T3-T5, whereas the difference between CK and T1 and T2 in 2015 and T2 in 2016 was only 10-19% amount to CK (Figure 5e,f ). As reported, water stress leading to the reduction in grain yield was mostly due to a reduction in DM allocation to grains and not as much due to lower production of DM (Oveysi et al 2010). Currently effects of drought stress on carbon assimilation have been well considered in majority of crop growth models (Jones et al 2003, Saseendran et al 2014, while effects on DM partitioning were rarely considered (or considered empirically) due to an inadequate understanding of the partitioning process (Cavero et al 2000, Li et al 2006.…”

Section: Resultsmentioning

confidence: 99%

Differential responses of maize yield to drought at vegetative and reproductive stages

Mi¹,

Cai²,

Zhang³

et al. 2018

Plant Soil Environ.

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. (2018): Differential responses of maize yield to drought at vegetative and reproductive stages. Plant Soil Environ., 64: 260-267.Determining the effects of progressive drought (PD) on dry matter production, partitioning, and grain yield of maize will help in designing a suitable strategy for water management. Though influences of drought on maize growth and development have been investigated extensively, few of them focused on the effects of different duration and occurrence stage of PD on yield formation of maize. Six variations of PD, in the form of withholding irrigation for varying lengths of time from jointing or tasselling, were tested in the field, using a mobile rain shelter, in terms of their effects on aboveground biomass accumulation, partitioning, and grain yield in 2015-2016. The results showed that grain yield was significantly reduced by PD during either vegetative or reproductive stage, and the reduction in grain yield from reproductive PD (41.6-46.6%) was greater than that from vegetative PD (18.6-26.2%). The decrease in grain yield was largely caused by the decrease in kernels per ear (r 2 = 0.88, P < 0.001). This research implied that guaranteeing water supply for maize during reproductive stage is crucially important to avoid the reduction in kernels per ear and grain yield.

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Section: Resultsmentioning

confidence: 99%

Differential responses of maize yield to drought at vegetative and reproductive stages

Mi¹,

Cai²,

Zhang³

et al. 2018

Plant Soil Environ.

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“…Also in wheat and maize, individual grain mass could partly compensate for reduced grain numbers , Oveysi 2010) but did not always respond (Borras et al 2004).…”

Section: Resultsmentioning

confidence: 99%

Source capacity during flowering affects grain yield of amaranth (Amaranthus sp.)

Roitner-Schobesberger¹,

Kaul²

2013

PLANT SOIL ENVIRON

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Amaranth is a promising C4-crop. However, for a wider spread of the crop a better understanding of factors that are influencing yield formation is crucial for optimizing the plant phenotype and enhancing yield. The present study wanted to clarify the effects of assimilate sources and sinks on yield formation by artificially altering source or sink size. Field experiments were conducted in Eastern Austria during three years with three genotypes, applying source-sink manipulation treatments at mid flowering (control, 50% of inflorescence removed, 50% or 100% of leaves removed). At maturity we measured shoot, inflorescence and grain dry matter, thousand kernel mass and number of seeds per plant. An average grain yield level of about 3.5 t/ha dry matter on control plots indicated favorable growth conditions for amaranth in general. The removal of all leaves had a strong detrimental effect on all parameters, but severity of yield reduction due to defoliation differed between genotypes, ranging from -49% to -73%. Contrastingly, 50% flower reduction did not have any significant effects. Also with 50% defoliation no significant yield reduction was observed. We conclude that source strength of amaranth during flowering is more yield limiting than its sink capacity.

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“…The unfavorable climatic conditions during the growing season of maize in 2006, that is, the dry period in June and July, may be the probable cause of lower yield compared to the situation in 2008 in all tillage variants, except for variant A. Also, Wilhelm and Wortmann (2004) and Oveysi et al (2010) have found a lower test weight of grain of maize and soybean in years with less precipitation during summer. In 2007, the drought period ensued in soybean seedfilling stage, and for this reason, both yield and the 1000 kernel weight were lowered compared with the same parameters in 2009.…”

Section: Discussionmentioning

confidence: 97%

Yields and Yield Components of Maize (Zea Mays L.) and Soybean (Glycine Max) as Affected by Different Tillage Methods

Kvaternjak

Kisić

Birkáš

et al. 2015

Ekológia (Bratislava)

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Kvaternjak I., Kisić I., Birkás M., Špoljar A., Marenčić D.: Yields and yield components of maize (Zea mays L.) and soybean (Glycine max) as affected by different tillage methods. Ekológia (Bratislava), Vol. 34, No. 4, p. 371-379, 2015. At the experiment station of the Krizevci College of Agriculture, yield and yield components of maize (Zea mays L.) and soybean (Glycine max) grown in rotation under five different methods of tillage were investigated. The aim of this study was to determine the effect of different tillage methods on yield and yield components of maize and soybean. The results and the determined number of plants per hectare of maize and soybean show that more favorable conditions for germination are in variants where ploughing performed in the autumn (variants C, D and E). During a four-year study, the minimum number of plants per hectare of maize and soybean was found in variant A. The dry season in panicle stage of maize in 2006 has lowered yields compared to 2008, and the drought in 2007 during the seed-filling period reduced the yield and the 1000 kernel weight of soybean compared with 2009 in all variants of tillage methods. The highest grain yield of maize was recorded in variant B. During 2006, with the unfavorable weather conditions, the lowest grain yield of maize was recorded in variant E with intensive tillage treatment. The highest yield of soybean was recorded in variant E, but there were no statistically significant differences compared to variants with the reduction of additional tillage interventions (variant B, C and D). With respect to maize grain and soybean seed yield, variant A was the lowest. Considering the achieved yields of maize grain, there is a possibility of reducing additional tillage interventions, whilst for achieving higher yield of soybean seed intensive tillage is recommended.

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The impact of source restriction on yield formation of corn (Zea mays L.) due to water deficiency

Cited by 12 publications

References 14 publications

Differential responses of maize yield to drought at vegetative and reproductive stages

Differential responses of maize yield to drought at vegetative and reproductive stages

Source capacity during flowering affects grain yield of amaranth (Amaranthus sp.)

Yields and Yield Components of Maize (Zea Mays L.) and Soybean (Glycine Max) as Affected by Different Tillage Methods

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