scholarly journals Monitoring Internal Properties of On-Plant Tomato Fruits Using NIR Spectroscopy for Control of Nutrient Solution in Soilless Culture

2005 ◽  
Vol 43 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Nafis KHURIYATI ◽  
Takahisa MATSUOKA
Keyword(s):  
Nutrient Solution ◽  
Nir Spectroscopy ◽  
Soilless Culture ◽  
Tomato Fruits ◽  
Internal Properties

scholarly journals Thermography Study of Moderate Electrical Conductivity and Nutrient Solution Distribution System Effects on Grafted Tomato Soilless Culture

HortScience ◽  
2013 ◽  
Vol 48 (12) ◽  
pp. 1508-1512 ◽  
Author(s):  
Isidro Morales ◽  
Miguel Urrestarazu
Keyword(s):  
Electrical Conductivity ◽  
Nutrient Solution ◽  
Distribution System ◽  
Distribution Systems ◽  
Quality Parameters ◽  
Moderate Increase ◽  
Soilless Culture ◽  
Tomato Crop ◽  
Tomato Production ◽  
Four Blocks

In recent decades, salinity in the culture of tomatoes has been one of the most studied parameters. This study aimed to evaluate the effect of a moderate increase in salinity, fertigation distribution, and its control using thermography on a soilless culture of grafted tomato. A tomato crop (cv. Ramyle) grafted onto tomato rootstocks (cv. Emperor) was cultivated in coir crop units at the University of Almeria from Nov. 2012 to May 2013. A plot design subdivided with four blocks was used, with salinity values of 2.0 and 2.5 dS·m−1 in the main plots and fertigation distribution systems with either one (DD1) or four (DD4) drip manifolds in the subplots. The crop productivity was measured using total crop yield, commercial value, and size. The quality parameters in the fruits were not significantly affected. Thermographies were used to aid the control of differential transpiration exerted by salinity. The difference in salinity did not significantly affect the total or commercial production. However, despite being grafted plants, there was a statistically significant effect (P ≤ 0.05) on the fruit size distribution when the electrical conductivity (EC) of the nutrient solution was increased from 2.0 to 2.5 dS·m−1, with a lower production (16%) of large fruits and an increased production of smaller fruits. The DD4 system significantly increased large tomato production (22%) compared with DD1, and the quality parameters in the fruits were not significantly affected. As a result of the improvement in tomato size, the DD4 distribution system economically offset the required higher initial expenditure compared with the DD1 system. Thermography was revealed to be a robust, simple, and quick tool for diagnosing the effect of salinity on transpiration.

scholarly journals Evolution of Nutritional Value of Two Tomato Genotypes Grown in Soilless Culture as Affected by Macrocation Proportions

HortScience ◽  
2006 ◽  
Vol 41 (7) ◽  
pp. 1584-1588 ◽  
Author(s):  
Simone Fanasca ◽  
Giuseppe Colla ◽  
Youssef Rouphael ◽  
Francesco Saccardo ◽  
Giuseppe Maiani ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Tocopherol Content ◽  
Soilless Culture ◽  
Fresh Weight ◽  
Fruit Tissue ◽  
Ripening Stages ◽  
Lycopene Content ◽  
Antioxidant Concentration ◽  
Standard Cultivar ◽  
Β Carotene

A greenhouse experiment was carried out to determine the effect of cationic proportions (K, Ca, Mg) in the nutrient solution on carotenoids and α-tocopherol content at green–orange, orange, red, and intense-red ripening stages using a high-pigment tomato (Lycopersicon esculentum Mill.) cultivar hp (`Lunarossa') and a standard cultivar (`Corfù') grown in a soilless culture. The highest lycopene concentration was observed in the `hp' cultivar at the red and intense-red ripening stages (3.0 mg/100 g fresh weight and 3.2 mg/100 g fresh weight respectively). In both cultivars, the concentration of β-carotene increased during the ripening stages, reaching the highest value (0.6 mg/100 g fresh weight) at the intense-red stage. The hp cultivar has guaranteed higher lycopene (average, 2.0 mg/100 g fresh weight vs. 1.7 mg/100 g fresh weight) and α-tocopherol contents (average, 1.2 mg/100 g fresh weight vs. 0.9 mg/100 g fresh weight) than those of the standard. In both cultivars, a high proportion of K in the nutrient solution increased antioxidant concentration β-carotene and especially lycopene) during the red and intense-red ripening stages, followed by Mg. The lowest values were recorded for the Ca treatment. Lastly, a positive correlation was recorded between fruit tissue K and lycopene content, whereas a negative correlation was observed between fruit tissue Ca and lycopene content.

scholarly journals Fertigation Temperature Adjustment Enhances the Yield and Quality of Saffron Grown in a Soilless Culture System

HortScience ◽  
2021 ◽  
pp. 1-4
Author(s):  
Yasmina Chourak ◽  
El Hassan Belarbi ◽  
Evelynn Y. Martínez-Rivera ◽  
Tatiana Pagan Loeiro da Cunha-Chiamolera ◽  
Ana Araceli Peña-Fernández ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
International Organization ◽  
Control Treatment ◽  
Soilless Culture ◽  
Organoleptic Properties ◽  
Phytochemical Content ◽  
Flower Production ◽  
Nutritive Solution ◽  
Yield And Quality

Saffron is one of the most appreciated, traditional, and expensive spices in the world. The objective of our study was to evaluate the effect of cooling the nutrient solution on the production, and organoleptic and commercial qualities of saffron grown in soilless culture. The nutrient solution was cooled to 4 to 5 °C whereas the control treatment was the fertigation supplied at ambient temperature. Corms were placed in a controlled cultivation chamber. The number of flowers per corms, and the weight and length of stigmas were measured. The amounts of safranal, crocin, and picrocrocin were analyzed spectrophotometrically according to the International Organization for Standardization [ISO/TS 3632-2 (2011) Normative]. Our results show that cooling of the nutritive solution increased flower production, the commercial phytochemical content, and organoleptic properties.

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