7678807883

Материал из Антэкология /// Anthecology
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The Effects of Periods of Low Intensity Illumination at Night on Flowering and Seed Production in S.48 Timothy (Phleum pratense)
Journal of Applied Ecology, . V. 2. No. 1. P. 137143 (7).
The effects of light-breaks at night on flowering and seed production of S.48 timothy (Phleum pratense) grown in field plots were investigated during 1962-63. A light-break from 11.30 p.m. to 12.30 a.m. (13 ft-candles) during March and April, using tungsten filament bulbs, advanced the date of ear initiation by 20 days and increased the period between ear initiation and ear emergence by 10-11 days. Ear length and seed weight per ear were increased in both years and in 1963 the number of ear-bearing tillers was also increased. On average, for the two years, the seed weight per plant was doubled. Dividing the light-break into three periods did not increase the effect. The effect of the light-break appeared to be related to the amount of light energy used. The possible causes of a relationship between earlier ear initiation and increased seed yield are discussed.
The Effects of Periods of Low Intensity Illumination at Night on Flowering and Seed Production in S.48 Timothy (Phleum pratense)
Bean E.W.
Journal of Applied Ecology, 1965. V. 2. No. 1. P. 137–143 (7).
The effects of light-breaks at night on flowering and seed production of S.48 timothy (Phleum pratense) grown in field plots were investigated during 1962-63. A light-break from 11.30 p.m. to 12.30 a.m. (13 ft-candles) during March and April, using tungsten filament bulbs, advanced the date of ear initiation by 20 days and increased the period between ear initiation and ear emergence by 10-11 days. Ear length and seed weight per ear were increased in both years and in 1963 the number of ear-bearing tillers was also increased. On average, for the two years, the seed weight per plant was doubled. Dividing the light-break into three periods did not increase the effect. The effect of the light-break appeared to be related to the amount of light energy used. The possible causes of a relationship between earlier ear initiation and increased seed yield are discussed.
AID: 7678807883
DOI: 10.2307/2401699
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