VARIABILITY OF PLANT GROWTH WITHIN CONTROLLED-ENVIRONMENT CHAMBERS AS RELATED TO TEMPERATURE AND LIGHT DISTRIBUTION

1973 ◽  
Vol 53 (1) ◽  
pp. 215-220 ◽  
Author(s):  
MARY MEASURES ◽  
PEARL WEINBERGER ◽  
H. BAER
Keyword(s):  
Experimental Data ◽  
Environmental Factors ◽  
Light Intensity ◽  
Plant Growth ◽  
Growth And Development ◽  
Position Effect ◽  
Great Variability ◽  
Light Distribution ◽  
Controlled Environment ◽  
Growth Chambers

Measurements of temperature and light intensity were made at different locations within three growth chambers. Environmental factors were found to vary with location. A great variability in the growth and development of cucumber and corn was noted in plants grown within these growth chambers. This "position effect" significantly affected the population homogeneity at the 5% level. The possibility of a bias of experimental data and the requirement for randomization and rotation of plants within a growth chamber are highlighted by the present study.

scholarly journals ETHYLENE EVOLUTION BY CROP STANDS GROWN IN A CLOSED, CONTROLLED ENVIRONMENT

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 682c-682 ◽  
Author(s):  
R.M. Wheeler ◽  
K.A. Corey ◽  
B.A. Vieux ◽  
S.W. Mosakowski ◽  
J.C. Sager ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Plant Growth ◽  
Similar Pattern ◽  
Growth And Development ◽  
Growth Chamber ◽  
Controlled Environment ◽  
Ethylene Evolution ◽  
Ethylene Concentration ◽  
Contaminant Control

Ethylene concentrations were monitored using gas chromatography (GC/PID) throughout growth and development of wheat, soybean, and lettuce stands grown hydroponically inside a large, closed growth chamber (20 m2 area, 113 m3 vol.). For wheat (cv. Yecora Rojo), ethylene concentration increased from < 10 ppb to about 120 ppb at about 28 days after planting (pre-anthesis) and then declined sharply over the next 4 weeks to a plateau of about 10 ppb during canopy maturation and senescence. A similar pattern of evolution was measured for soybean stands (cv. McCall), with peak concentrations of 40 to 70 ppb occurring near 50 days after planting. Unlike wheat, a slight increase in ethylene was noted in the latter stages of soybean stand senescence. For lettuce stands (cv. Waldmann's Green), ethylene increased slowly to 10 to 15 ppb by 24 days after planting, and then rose sharply to 40 ppb by 28 days, when plants were harvested. Data will be used to define ranges for phytotoxicity studies and to project atmospheric contaminant control needs for tightly closed plant growth systems.

Uniformity of Light Distribution and Plant Growth in Controlled Environment Chambers 1

1964 ◽  
Vol 56 (2) ◽  
pp. 242-243 ◽  
Author(s):  
G. E. Carlson ◽  
G. A. Motter ◽  
V. G. Sprague
Keyword(s):  
Plant Growth ◽  
Light Distribution ◽  
Controlled Environment

Temperature and Photoperiod Effects on Onionweed (Asphodelus fistulosus) and Its Potential Range in the United States

1996 ◽  
Vol 10 (4) ◽  
pp. 684-688 ◽  
Author(s):  
David T. Patterson
Keyword(s):  
United States ◽  
Environmental Factors ◽  
Growth And Development ◽  
Reproductive Development ◽  
The United States ◽  
Controlled Environment ◽  
Potential Range ◽  
Leaf Production ◽  
Environmental Responses ◽  
The U.S

Environmental factors that affect the growth and development of onionweed were evaluated in order to predict its potential range and impact in the U.S. In controlled-environment experiments, onionweed achieved 60 to 100% of its maximum vegetative growth at temperatures ranging from 18/11 to 30/23 C day/night. The greatest biomass was produced at day temperatures of 18 or 24 C and night temperatures of 11 or 17 C. Leaf production and reproductive development were greatest at 18/11 C. Plants eventually flowered also at 18/17, 24/17, and 24/11 C but not in any regime with a 30 C-day or a 23 C-night. Flowering occurred earlier in 16-h photoperiods than in 16-h photoperiods than in 8-h photoperiods. Climatic analyses revealed no U.S. analogs of the principal Australian onionweed sites. Based on its environmental responses and its pattern of distribution as a weed in Australia, onionweed will likely remain confined to the southwestern U.S.

scholarly journals Vegetative traits can predict flowering quality in Phalaenopsis orchids despite large genotypic variation in response to light and temperature

PLoS ONE ◽  
2021 ◽  
Vol 16 (5) ◽  
pp. e0251405
Author(s):  
Evelien van Tongerlo ◽  
Wim van Ieperen ◽  
Janneke A. Dieleman ◽  
Leo F. M. Marcelis
Keyword(s):  
Light Intensity ◽  
Plant Growth ◽  
Vegetative Growth ◽  
Growth And Development ◽  
Plant Biomass ◽  
Genotypic Variation ◽  
Biomass Accumulation ◽  
Plant Size ◽  
Plant Growth And Development ◽  
Vegetative Traits

Phalaenopsis is an economically important horticultural ornamental, but its growth is slow and costly. The vegetative cultivation phase is long and required to ensure sufficient plant size. This is needed to develop high quality flowering plants. We studied the effects of temperature (27 or 31 °C) and light intensity (60 or 140 μmol m-2 s-1) on plant growth and development during the vegetative cultivation phase in two experiments, with respectively 19 and 14 genotypes. Furthermore, the after-effects of treatments applied during vegetative growth on flowering traits were determined. Increasing light intensity in the vegetative phase accelerated both vegetative plant growth and development. Increasing temperature accelerated vegetative leaf appearance rate, but strongly reduced plant and root biomass accumulation when temperatures were too high. Flowering was greatly affected by treatments applied during vegetative growth, and increased light and temperature increased number of flower spikes, and number of flowers and buds. Genotypic variation was large in Phalaenopsis, especially in traits related to flowering, thus care is needed when generalising results based on a limited number of cultivars. Plant biomass and number of leaves during vegetative growth were positively correlated with flowering quality. These traits can be used as an early predictor for flowering capacity and quality of the final product. Additionally, this knowledge can be used to improve selection of new cultivars.

scholarly journals ANALISIS PENDAPATAN USAHATANI PADI CIHERANG DAN IR.64 DI KECAMATAN BANYUBIRU, KABUPATEN SEMARANG

Agrika ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 47
Author(s):  
Stanie Aster Wijaya ◽  
Lasmono Tri Sunaryanto ◽  
Hendrik Johanes Nadapdap
Keyword(s):  
Environmental Factors ◽  
Plant Growth ◽  
Soil Ph ◽  
Growth And Development ◽  
Soil Structure ◽  
Rice Production ◽  
P Value ◽  
Rice Farming ◽  
Plant Growth And Development ◽  
Rice Varieties

ABSTRAKDalam pengembangan dunia pertanian, Indonesia terus mengembangkan beragam varietas padi. Hal ini karena pertumbuhan penduduk yang cukup pesat, produksi beras Indonesia tidak mampu mencukupi kebutuhan dalam negeri sehingga perlu dilakukan impor beras. Penelitian ini bertujuan mengetahui faktor yang berpengaruh pada pendapatan usahatani padi dan membandingkan pendapatan usahatani padi antara varietas Ciherang dengan IR.64. Dilihat dari geografisnya, Kabupaten Semarang cukup strategis dan memiliki potensi wilayah dalam peningkatan produksi beras. Di Kecamatan Banyubiru, Kabupaten Semarang, petani lebih memilih varietas Ciherang dan IR64 untuk ditanam karena sesuai dengan faktor lingkungan pertumbuhan dan perkembangan tanaman, seperti suhu, struktur tanah, jenis tanah, pH tanah dan iklim. Hasil penelitian menunjukkan varietas Ciherang pada indikator benih lebih efektif dibandingkan varietas IR.64 dengan p-value < 0,05. Sedangkan untuk varietas IR.64 indikator pupuk, tenaga kerja, dan pestisida lebih efektif dibandingkan dengan varietas Ciherang dengan p-value < 0,05.ABSTRACTIn developing of agriculture, Indonesia continues to develop a variety of rice varieties. This is because the population growth is quite rapid, so that Indonesia rice production is not able to meet domestic needs so it requires importing rice from other countries. This study aims to determine the factors that influence rice farming income and compare it between Ciherang and IR.64 varieties. From its geography, Semarang Regency is quite strategic and has the potential of the region in increasing rice production. In Banyubiru District, Semarang Regency, farmers prefer Ciherang and IR.64 varieties to be planted because they are in accordance with environmental factors with plant growth and development, such as temperature, soil structure, soil type, soil pH and climate. The results showed that the Ciherang variety in the seed indicator was more effective than the IR.64 variety with p-value <0.005. Whereas for IR.64 varieties, fertilizer, labor and pesticide indicators were more effective than Ciherang varieties with p-value <0.05.

scholarly journals History of Controlled Environment Horticulture: Indoor Farming and Its Key Technologies

HortScience ◽  
2022 ◽  
Vol 57 (2) ◽  
pp. 247-256
Author(s):  
Cary A. Mitchell
Keyword(s):  
Environmental Factors ◽  
Plant Growth ◽  
Crop Production ◽  
Controlled Environment ◽  
Specialty Crops ◽  
Specialty Crop ◽  
History Of ◽  
Controlled Environments ◽  
Basic And Applied Research ◽  
Experimental Findings

The most recent platform for protected horticultural crop production, with the shortest history to date, is located entirely indoors, lacking even the benefit of free, natural sunlight. Although this may not sound offhand like a good idea for commercial specialty-crop production, the concept of indoor controlled-environment plant growth started originally for the benefit of researchers—to systematically investigate effects of specific environmental factors on plant growth and development in isolation from environmental factors varying in uncontrolled ways that would confound or change experimental findings. In addition to its value for basic and applied research, it soon was discovered that providing nonlimiting plant-growth environments greatly enhanced crop yield and enabled manipulation of plant development in ways that were never previously possible. As supporting technology for indoor crop production has improved in capability and efficiency, energy requirements have declined substantially for growing crops through entire production cycles in completely controlled environments, and this combination has spawned a new sector of the controlled-environment crop-production industry. This article chronicles the evolution of events, enabling technologies, and entrepreneurial efforts that have brought local, year-round indoor crop production to the forefront of public visibility and the threshold of profitability for a growing number of specialty crops in locations with seasonal climates.

Controlled-Environment Sunlit Plant Growth Chambers

2000 ◽  
Vol 19 (4) ◽  
pp. 347-375 ◽  
Author(s):  
L. Liu ◽  
G. Hoogenboom ◽  
K. T. Ingram
Keyword(s):  
Plant Growth ◽  
Controlled Environment ◽  
Growth Chambers
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