The effect of temperature and light during storage of young seed potatoes on initial plant development at early plantings

7. In order to test the validity of previous results, a trial was performed in greenhouses on the effect of temperature, age and N level on production, morphological and chemical composition of Brachiaria ruziziensis Germain & Evrard and Setaria sphacelata (Schum) Stapf & Hubbard. The 2 grasses were equally productive, but Setaria had a lower optimum temperature. Brachiaria was leafier than Setaria and had higher contents of nitrate and protein; it was also more digestible. It had higher contents of cations, inorganic anions and organic acids, but its oxalate content was lower both in leaves and in stems. Leaves of Brachiaria were much richer in nitrate than those of Setaria at the same protein content. At a greater age, both grasses had higher yields that originated from a greater number of heavier tillers. Plants were less leafy; nitrate and protein contents, and digestibility of organic matter were lower, but percentage of cell-wall constituents was higher. Increase of temperature stimulated plant development in both grasses, causing lower protein content and lower digestibility of organic matter in leaves and stems. Temperature also had a direct negative effect on stem digestibility apart from its effect on stem development. N application increased production, nitrate and protein content in both grasses, but had hardly any effect on plant development and digestibility. Consequently, Setaria reacted to environmental conditions like the other tropical grasses studied in this and previous trials, so confirming the conclusions. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Determination of Basal Temperature and Its Relationship With Jatropha Crop in Irrigated and Non-irrigated System

Journal of Agricultural Science ◽

10.5539/jas.v11n2p465 ◽

2019 ◽

Vol 11 (2) ◽

pp. 465

Author(s):

Diogo H. M. Moraes ◽

Derblai Casaroli ◽

Adão W. P. Evangelista ◽

José Alves Júnior ◽

Rafael Battisti ◽

...

Keyword(s):

Plant Development ◽

Climatic Conditions ◽

Planting Density ◽

Effect Of Temperature ◽

Coefficient Of Determination ◽

Plant Responses ◽

Air Temperatures ◽

Crop Development ◽

Thermal Sum ◽

Two Phases

Full plant growth and development require, among others, air temperatures and water availability at levels appropriate to each crop. The effect of temperature on plant development can be represented by the thermal sum, which requires the lower basal temperature for each plant species. However, plant responses may be different when associated with different soil water contents. This work determined the lower and upper basal temperature of Jatropha curcas L. and verified the relationship between thermal sum and crop development under different water regimes, in the climatic conditions of Goiânia, GO, Brazil. We evaluated twenty-four plants cultivated at the planting density of 2,222.2 plants ha-1. Of these, twelve plants were irrigated from October 2010 to October 2012, whereas the other twelve remained unirrigated. Basal temperatures were estimated by four different methods described in the literature, in two phases of observation, maturity and total cycle. From the results, regression analysis was performed. The lower basal temperature was 4.9 and 7.2 °C, and upper basal temperature was 38.8 and 36.8 °C, respectively, for the maturity and total cycle stages. The accumulated thermal sum for the complete plant development of jatropha was 10,314.55 DD (±1574.73) for the non-irrigated treatment, and 9,260.67 DD (±735.06) for the irrigated treatment. The results of plant development showed good coefficient of determination in relation to the accumulated thermal sum.

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The Effect of Temperature, Photosynthetic Photon Flux Density, and Photoperiod on the Vegetative Growth and Flowering of `Autumn Bliss' Raspberry

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.128.3.0291 ◽

2003 ◽

Vol 128 (3) ◽

pp. 291-296 ◽

Cited By ~ 12

Author(s):

J.G. Carew ◽

K. Mahmood ◽

J. Darby ◽

P. Hadley ◽

N.H. Battey

Keyword(s):

Flux Density ◽

Plant Development ◽

Vegetative Growth ◽

Photosynthetic Photon Flux Density ◽

Rubus Idaeus ◽

Effect Of Temperature ◽

Photon Flux ◽

Photon Flux Density ◽

Photosynthetic Photon Flux ◽

Effects Of Temperature

The effects of temperature, photosynthetic photon flux density (PPFD) and photoperiod on vegetative growth and flowering of the raspberry (Rubus idaeus L.) `Autumn Bliss' were investigated. Increased temperature resulted in an increased rate of vegetative growth and a greater rate of progress to flowering. Optimum temperatures lay in the low to mid 20°C range. Above this the rate of plant development declined. Increased PPFD also advanced flowering. While photoperiod did not significantly affect the rate of vegetative growth, flowering occurred earliest at intermediate photoperiods and was delayed by extreme photoperiods. These responses suggest that there is potential for adjusting cropping times of raspberry grown under protection by manipulating the environment, especially temperature.

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EFFECT OF TEMPERATURE ON PLANT DEVELOPMENT AND INFLORESCENCE STRUCTURE OF SALVIA ROEMERIANA

Acta Horticulturae ◽

10.17660/actahortic.2012.937.115 ◽

2012 ◽

pp. 931-937

Author(s):

C. Cervelli ◽

E. D¿Adamio ◽

A. Capponi ◽

G. Zizzo

Keyword(s):

Plant Development ◽

Effect Of Temperature ◽

Inflorescence Structure

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Nucleation of Disorder in Fe3Al Alloys

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100061574 ◽

1967 ◽

Vol 25 ◽

pp. 312-313

Author(s):

P. R. Swann ◽

W. R. Duff ◽

R. M. Fisher

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Annealing Temperature ◽

Antiphase Domain ◽

Effect Of Temperature ◽

Domain Structures ◽

Transmission Electron ◽

Domain Boundaries ◽

Higher Temperature ◽

The One

Recently we have investigated the phase equilibria and antiphase domain structures of Fe-Al alloys containing from 18 to 50 at.% Al by transmission electron microscopy and Mössbauer techniques. This study has revealed that none of the published phase diagrams are correct, although the one proposed by Rimlinger agrees most closely with our results to be published separately. In this paper observations by transmission electron microscopy relating to the nucleation of disorder in Fe-24% Al will be described. Figure 1 shows the structure after heating this alloy to 776.6°C and quenching. The white areas are B2 micro-domains corresponding to regions of disorder which form at the annealing temperature and re-order during the quench. By examining specimens heated in a temperature gradient of 2°C/cm it is possible to determine the effect of temperature on the disordering reaction very precisely. It was found that disorder begins at existing antiphase domain boundaries but that at a slightly higher temperature (1°C) it also occurs by homogeneous nucleation within the domains. A small (∼ .01°C) further increase in temperature caused these micro-domains to completely fill the specimen.

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The effect of temperature on high-resolution TEM image contrast

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100139573 ◽

1995 ◽

Vol 53 ◽

pp. 640-641

Author(s):

T. Geipel ◽

W. Mader ◽

P. Pirouz

Keyword(s):

Form Factor ◽

Inelastic Scattering ◽

Accurate Method ◽

Waller Factor ◽

Effect Of Temperature ◽

Specimen Thickness ◽

Influence Of Temperature ◽

Debye Waller Factor ◽

Influence Of Temperature On ◽

Atomic Form Factor

Temperature affects both elastic and inelastic scattering of electrons in a crystal. The Debye-Waller factor, B, describes the influence of temperature on the elastic scattering of electrons, whereas the imaginary part of the (complex) atomic form factor, fc = fr + ifi, describes the influence of temperature on the inelastic scattering of electrons (i.e. absorption). In HRTEM simulations, two possible ways to include absorption are: (i) an approximate method in which absorption is described by a phenomenological constant, μ, i.e. fi; - μfr, with the real part of the atomic form factor, fr, obtained from Hartree-Fock calculations, (ii) a more accurate method in which the absorptive components, fi of the atomic form factor are explicitly calculated. In this contribution, the inclusion of both the Debye-Waller factor and absorption on HRTEM images of a (Oll)-oriented GaAs crystal are presented (using the EMS software.Fig. 1 shows the the amplitudes and phases of the dominant 111 beams as a function of the specimen thickness, t, for the cases when μ = 0 (i.e. no absorption, solid line) and μ = 0.1 (with absorption, dashed line).

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