An ideotype of maize for conditions of high temperature and low moisture

Sangoi, Luís

doi:10.31274/rtd-180813-10235

Cited by 7 publications

(28 citation statements)

References 97 publications

(180 reference statements)

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“…Silk delay was consistently higher when no N was side-dressed. Maize is a species that presents a protandrous developmental pattern (Sangoi, 1996). This plant s characteristic is accentuated under adverse conditions such as nutritional deficiency, drought stress or high plant population (Sangoi & Salvador, 1998b).…”

Section: Resultsmentioning

confidence: 99%

Nitrogen fertilization impact on agronomic traits of maize hybrids released at different decades

Sangoi

Ender

Guidolin

et al. 2001

Pesq. agropec. bras.

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Genetic selection of maize hybrids is often conducted using high N rates during the breeding cycle. This procedure may either lead to the release of genotypes that present nitrogen luxury consumption or require a stronger N input to accomplish their yield potential. This work was carried out to evaluate the effects of N rates on grain yield and N use efficiency of hybrids cultivated in different decades in Southern Brazil. The trial was performed in Lages, Santa Catarina State. A split plot design was used. Hybrids Ag 12, Ag 28, Ag 303 and Ag 9012, released during the 60 s, 70 s, 80 s and 90 s, respectively, were evaluated in the main plots. Nitrogen rates equivalent to 0, 50, 100 and 200 kg ha -1 were side-dressed in the split-plots when each hybrid had six fully expanded leaves. Modern-day hybrid Ag 9012 had higher grain yield than hybrids of earlier eras, regardless of N rates. Under high doses of N, the older hybrids Ag 12 and Ag 28 took up more N and presented higher values of shoot dry matter at flowering than Ag 9012. Nonetheless, they set less grains per ear which contributed to decrease their grain yield and N use efficiency.

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Section: Resultsmentioning

confidence: 99%

Nitrogen fertilization impact on agronomic traits of maize hybrids released at different decades

Sangoi

Ender

Guidolin

et al. 2001

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…They also require fewer nutrients and photoassimilates to support their development (SANGOI & SALVADOR, 1996). Moreover, they produce less auxin, decreasing the possibility that auxin derived from the apical inflorescence exerts a hyperauxin effect on the growth of lateral branches leading to barrenness (SANGOI, 1996).…”

Section: Inflorescence Developmentmentioning

confidence: 99%

“…One of the major factors limiting optimum conversion of light energy to grain in maize grown at high plant densities is barrenness, the failure of plants to produce viable ears (SANGOI, 1996). A clear understanding of ear development, from its differentiation to silking is essential to explain population effects on the number of female inflorescences produced per plant and the number of viable differentiated spikelets.…”

Section: Ear Differentiationmentioning

confidence: 99%

“…Smaller tassels reflect and re-radiate lower amounts of solar radiation potentially available to the photosynthetic canopy (SANGOI, 1996). They also require fewer nutrients and photoassimilates to support their development (SANGOI & SALVADOR, 1996).…”

Section: Inflorescence Developmentmentioning

confidence: 99%

“…Maize is the only economically important grass that flowers monoeciously (SANGOI, 1996). Because the tassel is apical and differentiates first, it has developmental priority over the ears (SANGOI & SALVADOR, 1998b).…”

Section: Inflorescence Developmentmentioning

confidence: 99%

See 2 more Smart Citations

Understanding Plant Density Effects on Maize Growth and Development: An Important Issue to Maximize Grain Yield

2001

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Avaliação do potencial produtivo do milho híbrido AGN-30A06 em espaçamentos e populações diferenciadas

Cesaro¹

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Evaluation of mayze potential productivity (hybrid AGN-30A06) using different row spacing and plant population density With the purpose of evaluating the mayze potential yield (hybrid AGN-30A06) using different row spacing and plant population, in addition to analyzing the grain bromatological index and verifying the nitrogen management effect, a field experiment was carried out at 'Escola Agrotécnica Federal de Concórdia', in Concórdia, State of Santa Catarina, Brazil, using the randomized block design (split-plot) with two replications. The following spacing between plant rows were used: 0.45 m, 0.60 m and 0.80 m with populations of 60,000, 70,000 and 80,000 plants per hectare. The higher values of grain productivities were obtained with the spacing between plant rows of 0.45 m. Among the three plant densities, 80,000 plants per hectare with spacing between plant rows of 0.45 m provided a better result. This indicates that it is possible to increase grain yield increasing plant density under reduced spacing between plant rows. Related to the bromatology, it was verified that: (i) high level of fertilization results higher oil content, lower protein content, better quality of grain and lower incidence of diseases and (ii) low level of fertilization results higher protein content, lower oil content and greater amount of damaged grains.

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An ideotype of maize for conditions of high temperature and low moisture

Cited by 7 publications

References 97 publications

Nitrogen fertilization impact on agronomic traits of maize hybrids released at different decades

Nitrogen fertilization impact on agronomic traits of maize hybrids released at different decades

Understanding Plant Density Effects on Maize Growth and Development: An Important Issue to Maximize Grain Yield

Avaliação do potencial produtivo do milho híbrido AGN-30A06 em espaçamentos e populações diferenciadas

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