scholarly journals EFFETS DE TROIS TEMPÉRATURES NOCTURNES DE L’AIR SUR LES RENDEMENTS DE LA TOMATE DE SERRE CULTIVÉE EN SOL ET EN NFT

1989 ◽  
Vol 69 (1) ◽  
pp. 317-324
Author(s):  
CHRISTIAN CHOLETTE ◽  
DANIEL LORD
Keyword(s):  
Lycopersicon Esculentum ◽  
Air Temperature ◽  
Total Yield ◽  
Lycopersicon Esculentum Mill ◽  
Air Temperatures

The objective of this research was to evaluate the effects of low night-air temperatures on the early and total yields of the tomato (Lycopersicon esculentum Mill. ’Carmello’) grown with three stems in NFT and soil, in a greenhouse with small tunnels. Tomato was seeded on 16 Jan. and was grown under three night air temperatures (17, 12, 7 °C) for 2 mo after the sixth leaf had expanded and the first cluster was visible, say from 24 Feb. to 15 Apr. Total and marketable yields were significantly higher in NFT than in soil, but there was no advantage for the early yield. The date at which half the flowers of the first cluster opened was 2 wk earlier for the 17 °C treatment than for the 7 °C treatment, indicating that low night-air temperatures reduce the speed of development. Low night-air temperature significantly reduced the early yield, while the time to half of total yield increased by a factor of 2 wk in NFT and 1 wk in soil. Night air temperatures show large effects on the speed of development of the tomato and the earliness of the marketable yield.Key words: Tomato, greenhouse, night-air temperature, NFT, soil, early and total yields

Soil thermal and productive responses of biodegradable mulch materials in a processing tomato (Lycopersicon esculentum Mill.) crop

Soil Research ◽  
2016 ◽  
Vol 54 (2) ◽  
pp. 207 ◽  
Author(s):  
Marta M. Moreno ◽  
Alicia Cirujeda ◽  
Joaquín Aibar ◽  
Carmen Moreno
Keyword(s):  
Lycopersicon Esculentum ◽  
Soil Temperature ◽  
Agricultural Sector ◽  
Crop Yields ◽  
Total Yield ◽  
Fruit Weight ◽  
Climatic Conditions ◽  
Barley Straw ◽  
Processing Tomato ◽  
Lycopersicon Esculentum Mill

Mulch materials of different origin and colour are available in the agricultural sector as sustainable alternatives to the use of polyethylene (PE). Mulching modifies soil temperature and consequently affects crop yields. This work assessed the thermal and productive responses of different mulch materials in two different geo-climatic conditions during a 3-year integrated field study on processing tomato (Lycopersicon esculentum Mill.). Two biodegradable plastic mulches (BD1, BD2), one oxo-degradable material (OB), two types of paper (PP1, PP2) and one barley-straw cover (BS) were compared with two control treatments: black PE and manual weeding (MW). Soil temperature variables (maximum, minimum and mean temperature, soil growing degree-days and soil temperature amplitude) and production variables (marketable and total yield, mean fruit weight) were considered. Thermally, PE could be considered an atypical mulch causing higher temperatures in the soil, but it is not associated with a higher yield. Responses of PE, PP2 and MW were independent of the geo-environmental conditions, whereas OB, BD1 and BD2 had similar thermal and productive responses to each other in different environments. Tomato yield was correlated positively only with the minimum soil temperature, especially when excluding PE.

scholarly journals Yield of Greenhouse Tomato with Constant or Intermittent Heating of the Root and Shoot

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 607d-607
Author(s):  
M.P.N. Gent ◽  
Y.-Z. Ma
Keyword(s):  
Lycopersicon Esculentum ◽  
Diurnal Variation ◽  
Air Temperature ◽  
Root Zone ◽  
Constant Heat ◽  
Greenhouse Tomato ◽  
Air Temperatures ◽  
Intermittent Heating ◽  
Tomato Cultivars ◽  
Constant Heating

Is intermittent heating of the root zone more beneficial than constant heating for production of greenhouse tomato (Lycopersicon esculentum Mill), with diurnal variation of air temperature (DIF)? Yields were compared with 14°C day/14°C night or 22°C day/6°C night minimum air temperatures, resulting in 5 and 14°C DIF. The root zone was unheated or was heated to 20°C constantly or for 6 hours in the day, or 6 hours in the night. The greenhouse tomato cultivars Buffalo and Caruso were transplanted in early and late March in 1994 and 1995. Averaged over both years and cultivars, the yield from early March planting with 14°C DIF was greater than with 5°C DIF, 6.6 and 6.1 kg/plant, respectively, due to an increase in weight per fruit and to earlier ripening. Root zone heat increased yield compared to no heat, due to a greater number of fruit. With 5°C DIF, yields with constant and intermittent root zone heat were similar. The yields were 5.4, 6.4, 6.2, and 6.2 kg/plant with none, day, night and constant heat, respectively. With 14°C DIF, there were larger differences in yield, 5.7, 7.0, 6.6, and 7.1 kg/plant with none, day, night and constant root zone heat, respectively. However, interactions between air and root heat regimes were not statistically significant. The yield from late March planting was greater with 14°C than with 5°C DIF, but root zone heat had no effect. Research supported in part by grant 93-37100-9101 from NRI Competitive grants program/USDA.

scholarly journals Increasing early crops of unprotected tomatoes (Lycopersicon esculentum Mill.) with naphthoxyacetic acid applied on whole plants

2013 ◽  
Vol 42 (1-2) ◽  
pp. 35-46
Author(s):  
Krystyna Górecka ◽  
Leszek S. Jankiewicz
Keyword(s):  
Lycopersicon Esculentum ◽  
Gibberellic Acid ◽  
Active Ingredient ◽  
Total Yield ◽  
New Yorker ◽  
Lycopersicon Esculentum Mill ◽  
Whole Plant ◽  
Marked Decline ◽  
Whole Plants

A parthenocarpy-inducing preparation, Betokson, containing beta-naphthoxyacetic acid (NOA) as an active ingredient, was applied by spraying whole plants. As one of the controls, dipping the trusses in NOA solution was used according to a currently recommended technique. NOA applied by each of these treatment increased the very early yield (first 4 pickings) by 4-11 times in cv. Venture and 3-4 times in cv. New Yorker in comparison with the untreated controls. Treating the whole plant increased the very early yield more than did dipping the trusses. The early yield (first 8 pickings) was also increased in cv. Venture by NOA applied by both methods. Treatments with NOA decreased, however, the late yield. This decline was more marked with the higher NOA concentration and when the whole-plant-spray was applied. Gibberellic acid (GA<sub>3</sub>) applied alone as a whole-plant-spray at a concentration of 25 mg·dm<sup>-3</sup>, did not increase the very early yield but in combination with NOA, increased the early yield in cv. New Yorker. GA<sub>3</sub> alone, or in combination with NOA, applied as a spray on the whole plant caused marked chlorosis of the leaves and marked decline of the total yield.

On the dynamics of distribution of the American White Butterfly, Hyphantria cunea Drury, 1973 (Lepidoptera, Arctiidae), in Ukraine regarding the annual minimal air temperatures

2018 ◽  
Vol 14 (1) ◽  
pp. 44-57
Author(s):  
S. N. Shumov
Keyword(s):  
Air Temperature ◽  
Annual Reports ◽  
Complete Elimination ◽  
Hyphantria Cunea ◽  
White American ◽  
Gis Technologies ◽  
Data Analyses ◽  
Air Temperatures ◽  
Negative Temperatures

The spatial analysis of distribution and quantity of Hyphantria cunea Drury, 1973 across Ukraine since 1952 till 2016 regarding the values of annual absolute temperatures of ground air is performed using the Gis-technologies. The long-term pest dissemination data (Annual reports…, 1951–1985; Surveys of the distribution of quarantine pests ..., 1986–2017) and meteorological information (Meteorological Yearbooks of air temperature the surface layer of the atmosphere in Ukraine for the period 1951-2016; Branch State of the Hydrometeorological Service at the Central Geophysical Observatory of the Ministry for Emergencies) were used in the present research. The values of boundary negative temperatures of winter diapause of Hyphantria cunea, that unable the development of species’ subsequent generation, are received. Data analyses suggests almost complete elimination of winter diapausing individuals of White American Butterfly (especially pupae) under the air temperature of −32°С. Because of arising questions on the time of action of absolute minimal air temperatures, it is necessary to ascertain the boundary negative temperatures of winter diapause for White American Butterfly. It is also necessary to perform the more detailed research of a corresponding biological material with application to the freezing technics, giving temperature up to −50°С, with the subsequent analysis of the received results by the punched-analysis.

Sign in / Sign up

Export Citation Format

Share Document