Journal ArticleDOI
A reanalysis of the effects of temperature and irradiance on time to flowering in chrysanthemum (Dendranthema grandiflora)
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A reanalysis of previously published data describing flowering responses to light integral and temperature in chrysanthemum indicates that, over a wide range of temperatures and light integrals, the rate of progress of flowering increases linearly with increasing light integraland effective temperature.Abstract:
A reanalysis of previously published data describing flowering responses to light integral and temperature in chrysanthemum indicates that, over a wide range of temperatures and light integrals, the rate of progress of flowering increases linearly with increasing light integral and effective temperature. Effective temperature is the sub-optimum temperature equivalent of a supra-optimum temperature in terms of developmental rate. At low light integral the rate of progress to flowering decreases more rapidly with declining light integral. The relationships are contrasted with recently published functional relationships describing flowering in chrysanthemum to light and temperature.read more
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Mites (Acari) as a Factor in Greenhouse Management
Uri Gerson,Phyllis G. Weintraub +1 more
TL;DR: This review discusses the economically important pest mites of greenhouses, aspects of their biology, and the acarine predators that attack them as well as various insect pests.
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Measurement of Chlorophyll Fluorescence as a Heat Stress Indicator in Tomato: Laboratory and Greenhouse Comparisons
D.H. Willits,Mary M. Peet +1 more
TL;DR: Chlorophyll fluorescence was measured under both laboratory and greenhouse conditions in an effort to develop a quick, reliable and inexpensive laboratory procedure capable of predicting heat stress experienced by tomato ( Lycoper- sicon esculentum mill.) under greenhouse conditions.
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The impact of photoperiod and irradiance on flowering of several herbaceous ornamentals
Neil S. Mattson,John E. Erwin +1 more
TL;DR: Forty-one herbaceous species were grown under short-days and under long-days with or without supplemental high-pressure sodium lighting to identify the impact of photoperiod and irradiance on flowering of each species.
Journal ArticleDOI
Cooling Fan-ventilated Greenhouses: a Modelling Study
TL;DR: In this paper, a model for fan-ventilated greenhouse cooling is presented in which the primary heat transfer surfaces (cover/structure, canopy and floor) are represented as three parallel planes.
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The effect of temperature and photoperiod on the rate of flower initiation and the onset of dormancy in the strawberry (Fragaria x ananassa Duch.)
TL;DR: The quantity of starch in the roots increased during the autumn, and the rate of increase was negatively correlated with temperature, which indicates that root starch concentration is higher in autumn than in the summer.
References
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Dynamic Simulation of Plant Growth and Environment in the Greenhouse
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Simulation of the energy balance of a greenhouse
TL;DR: In this article, the energy balance of a greenhouse was simulated with a digital computer program and the thermal radiative, sensible, latent, and conductive heat fluxes were modeled by mathematical equations in terms of unknown temperatures and vapor pressures.
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Effects of temperature and photoperiod on flowering in chickpeas (Cicer arietinum L. )
TL;DR: It is suggested that the photo-thermal response of flowering in chickpeas, over the range of environments normally experienced by the crop, may be described by the equation 1/f = a + bt + cp in which f is the number of days from sowing to first flower, t is mean temperature and p is photoperiod.
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A Quantitative Model of Reproductive Development in Cowpea [Vigna unguiculata (L) Walp.] in relation to Photoperiod and Temperature, and Implications for Screening Germplasm
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The effect of different day/night temperature regimes on growth, development and yield of glasshouse tomatoes
TL;DR: Growth in length of the stem was strongly reduced by a lower day temperature and early yield was lower for this treatment, most likely caused by low transpiration.