Effect of Leaf Area on Tomato Yield

Heuvelink, E.; Bakker, M.J.; Elings, A.; Kaarsemaker, R.C.; Marcelis, L.F.M.

doi:10.17660/actahortic.2005.691.2

Cited by 71 publications

(47 citation statements)

References 11 publications

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“…These results agree with those reported in the literature, in the sense that the DM fraction for the leaves was higher (lower) than that for Bennett et al, 1979;Leskovar and Cantliffe, 1993;Wubs et al, 2007), tomato (69-74%; Heuvelink et al, 2005), cucumber (Cucumis sativus L.; 52-59%; Marcelis, 1993) and pepino (Solanum muricatum Ait. ; 30%; Fresquet et al, 2001).…”

Section: Discussionsupporting

confidence: 92%

Growth and Nutrient Absorption of Cape Gooseberry (Physalis PeruvianaL.) in Soilless Culture

Pascual-Seva

Bautista

Pascual

et al. 2015

Journal of Plant Nutrition

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Cape gooseberry (Physalis peruviana L.) is a solanaceous plant. The growth and time-course of nutrient accumulation of the plant and its partitioning between roots, stems, leaves, and fruits were examined. The study was conducted analyzing two nutrient solutions in soilless culture under greenhouse conditions during two consecutive seasons. The macronutrient contents were analyzed. On average, the yield was 8.9 t·ha -1 . Growth of the plant until 90 d after transplanting obeys an exponential function of time and the relative growth rate for this period was determined. Nitrogen (N) was the element that showed the highest concentration, corresponding to leaves (4.67%), followed by potassium (K) in stems (4.46%). The highest accumulations of N, phosphorous (P), calcium (Ca), and magnesium (Mg) were found in leaves and of K in the stems.Potassium showed the highest nutrient accumulation (29 g·plant -1 ) and the highest specific uptake rate.

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Section: Discussionsupporting

confidence: 92%

Growth and Nutrient Absorption of Cape Gooseberry (Physalis PeruvianaL.) in Soilless Culture

Pascual-Seva

Bautista

Pascual

et al. 2015

Journal of Plant Nutrition

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“…However, such an approach must also include considerations of how this will affect the crop yield. In studies, LAI has been shown to affect light interception and crop yield (Jones et al 1989, Heuvelink et al 2005. The amount of energy used for dehumidification could also be lower if the humidity set-point in a greenhouse is higher.…”

Section: Discussionmentioning

confidence: 99%

Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger

Maslak

Nimmermark

2017

AFSci

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The aim of the study was to estimate the amount of thermal energy used for dehumidification of a naturally ventilated tomato greenhouse and to estimate how mechanical ventilation with the use of a heat exchanger recovering heat from the exhaust to the supply air may decrease the energy use. Measured use of thermal energy in a naturally ventilated tomato greenhouse was compared to modelled values using Powersim® software. By the help of the model an estimation of the amount of energy used for dehumidification was made for the months April -September. A non-hygroscopic rotary air-to-air heat exchanger was studied, and its temperature and moisture efficiencies were measured. Modelling for leaf area index (LAI) 3.5 and 4.0 m 2 m -2 indicated that 23 and 29% of the total thermal energy was used for moisture removal respectively. Modelling for the heat exchanger indicated thermal energy savings of 15 and 17% for the same LAI respectively.

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“…Typically, a tomato crop in the Netherlands has a planting density of 2.5 plants m -2 and in summer stem density is 50% larger (3.75 stems m -2 ). Leaf picking strategy and the use of rootstocks may contribute to a higher LAI in summer (Heuvelink et al, 2005).…”

Section: New Trends In Crop Management Lai (Radiation Interception)mentioning

confidence: 99%

Innovation in Plant-Greenhouse Interactions and Crop Management

Heuvelink¹,

Gonzalez-Real²

2008

Acta Hortic.

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Abstract(Semi)-closed greenhouses allow for better control of climate conditions compared to conventional greenhouses. To make the high investments for such greenhouses economically feasible, substantial yield increases are necessary. In north-Europe supplementary assimilation light in greenhouse horticulture is increasingly used to improve yield and product quality to meet market demands for year-round production and to obtain a more regular labor demand throughout the year. Using inter-lighting instead of lights only on top of the crop, and Light Emitting Diodes (LEDs), could increase substantially light and energy efficiency. As soon as LEDs will reach high enough efficiency and feasible price, they are expected to replace high pressure sodium lamps in greenhouse horticulture. Another important issue is the choice of the greenhouse cover which should be optimized from the crop point of view. A cover with high transmission of light, but low transmission of NIR, results in a better climate during the warm season (reduced temperatures, less crop transpiration, higher CO 2 -concentration possible because of reduced ventilation demand). Increasing the diffusive power of the cover material could result in a better distribution of the radiation over the crop canopy, therefore leading to substantial increase in absorbed radiation (up to 20% for highly diffusive covers) and improving radiation use efficiency and yield. Under these new conditions (high CO 2 and high light levels) other genotypes than the present cultivars may be superior. However, the possible effect of breeding especially for these new conditions is still little investigated. Under improved crop management, maintaining leaf area index high enough and controlling source-sink balance is discussed. In conclusion, there are a lot of possibilities to further improve yield and quality of greenhouse produce, and meanwhile reduce the input of fossil fuel energy.

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Effect of Leaf Area on Tomato Yield

Cited by 71 publications

References 11 publications

Growth and Nutrient Absorption of Cape Gooseberry (Physalis PeruvianaL.) in Soilless Culture

Growth and Nutrient Absorption of Cape Gooseberry (Physalis PeruvianaL.) in Soilless Culture

Thermal energy use for dehumidification of a tomato greenhouse by natural ventilation and a system with an air-to-air heat exchanger

Innovation in Plant-Greenhouse Interactions and Crop Management

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