Effect of Nh4-N Level in the Nutrient Solution on the Incidence of Blossom-End Rot and Gold Specks on Tomato Fruit Grown in Rockwool

Nukaya, Akira; Goto, Kazumi; Jang, Han Ik; Kano, Atsushi; Ohkawa, K.

doi:10.17660/actahortic.1995.401.46

Cited by 13 publications

(7 citation statements)

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“…The concentration that negatively 286 correlated with BER incidence was apparently highest in winter and lowest in summer. Along with Ca supply, several factors, such as the order of inflorescences (ElGizawy and Adams, 1986;Nukaya et al, 1995), solar radiation (Sonneveld and Voogt, 1991), and temperature , have been reported to affect BER incidence. Except for salinity (Minamide and Ho, Relationship between the mean value of water-soluble Ca concentration in the distal half of tomato fruit and Ca concentration in the supplied nutrient solution in each experiment.…”

Section: Factors Affecting Water-soluble Calcium Concentration In Fruitmentioning

confidence: 99%

Incidence of Blossom-end Rot in Relation to the Water-soluble Calcium Concentration in Tomato Fruits as Affected by Calcium Nutrition and Cropping Season

Yoshida¹,

N²,

Vinh³

et al. 2014

J. Japan. Soc. Hort. Sci.

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To understand the factors affecting the incidence of blossom-end rot (BER), the effect of the Ca/K ratio (4/12-12/4, in me·L -1 ) in nutrient solutions and Ca concentration in fractions in the distal part of young tomato fruits immediately before BER symptoms appear were investigated for three seasons. The rate of BER incidence increased with a decrease in the Ca/K ratio in the supplied solutions in the summer and spring, but little difference was observed in the winter. Ca concentration was highest in winter and lowest in summer, and the concentration in fractions decreased with a decrease in the Ca/K ratio of the solutions. When the results of all three experiments were pooled, among the fractions, water-soluble Ca concentration was found to have the highest significance in the relationship to BER incidence. The risk of BER incidence in rapidly growing tomato increased to a critical level when water-soluble Ca in the distal part of the fresh fruit decreased to less than 0.20 μmol·g -1 FW. Multiple-regression analysis revealed that the concentration of water-soluble Ca, which is predominantly recovering apoplastic or cytoplasmic Ca 2+ , and total Ca, which has been translocated during fruit development, are significantly affected by solar radiation and Ca concentration in the supplied solution rather than air temperature.

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Section: Factors Affecting Water-soluble Calcium Concentration In Fruitmentioning

confidence: 99%

Incidence of Blossom-end Rot in Relation to the Water-soluble Calcium Concentration in Tomato Fruits as Affected by Calcium Nutrition and Cropping Season

Yoshida¹,

N²,

Vinh³

et al. 2014

J. Japan. Soc. Hort. Sci.

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“…Generally, nitrogen supply in the form of NH 4 should be lower than 10% of total nitrogen in order to minimise the susceptibility of fruit to BER [8] and fruit with gold specks [147,184]. Recently, significant interaction has been reported between NH 4 concentration and the night-time salinity [159].…”

Section: Composition Of the Nutrient Solutionmentioning

confidence: 99%

Influence of electric conductivity management on greenhouse tomato yield and fruit quality

2001

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-The osmotic and ionic effects of the electrical conductivity (EC) of the nutrient solution and its interactions with climatic factors and cultural practices on tomato yield and fruit quality are reviewed. Adjusting the salinity of the nutrient solution allows growers to modify water availability to the crop and hence improve fruit quality. At some point, however, increases in salinity limit marketable yield. Under high ECs, fruit size is inversely related to EC while the dry matter content of the fruit is linearly increased by the EC. The exact rate of yield decline varies with interactions between cultivars, environmental factors, composition of the nutrient solution, and crop management. According to different studies and growth conditions, salinities higher than 2.3-5.1 mS⋅cm -1 result in an undesirable yield reduction, while ECs of 3.5-9.0 mS⋅cm -1 improve tomato fruit quality. Manipulating the indoor climate such as humidity, temperature and ambient CO 2 level may offset the negative effect of high salinity on yield and fruit quality such as blossom-end rot. The light intensity received by the plant directly affects the quantity of photoassimilates available to the fruit, it also increases their sugar: acid ratio, and influences the transpiration rate and the water uptake by the plant, which in turn, affect the EC around the root. Increasing the EC with NaCl reduces titratable acids, potassium and nitrogen in the fruit but also increases their sodium content. NaCl enhances the sweetness of tomato fruit and improves the overall flavour intensity. Depending upon the composition of the saline solution, ion toxicities or nutritional deficiencies may arise because of a predominance of specific ion or competition effects among cations and anions. Keeping the proper nutrient levels and ratios between all the nutrients in the root environment for each growth stage of a crop should be targeted in order to achieve high yields and high quality products throughout the cropping season. Several EC and fertigation management regimes could improve fruit quality and are presented in this review.Lycopersicon esculentum / tomato / electrical conductivity / salinity / fruit quality / greenhouse Résumé -Influence de la régie de la conductivité électrique de la solution nutritive sur le rendement et la qualité de la tomate de serre. Cette revue de littérature porte sur les effets osmotiques et ioniques de la conductivité électrique (CE) de la solution nutritive et de ses liens avec les facteurs climatiques et culturaux sur le rendement et la qualité de la tomate de serre. L'ajustement de la salinité de la solution nutritive permet aux producteurs de modifier la disponibilité en eau pour la plante de façon à contrôler la qualité des fruits. Cependant, des salinités élevées affectent le rendement vendable. Sous une haute CE, le calibre des fruits est inversement relié à la CE alors que le contenu en matière sèche des fruits augmente linéairement avec la CE. Le taux de réduction du rendement varie selon les interactions e...

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“…For some physiological disorders involving reduced tissue Ca, it has been shown that the disorder is induced by several environmental factors, the most significant of which are salinity and high NH 4 + concentrations in the rooting medium (Wojciechowski et al, 1969;Nukaya et al, 1995). In pepper, increased irrigation N concentrations and NH 4 + :NO 3 -ratios increased the incidence of blossom-end rot (Bar-Tal et al, 2001a;Marti and Mills, 1991).…”

Section: Discussionmentioning

confidence: 99%

Development of “stem-topple” disorder inRanunculus asiaticusis related to localised disturbances in tissue calcium levels

Bernstein

Luria

Bruner

et al. 2008

The Journal of Horticultural Science and Biotechnology

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Effect of Nh4-N Level in the Nutrient Solution on the Incidence of Blossom-End Rot and Gold Specks on Tomato Fruit Grown in Rockwool

Cited by 13 publications

References 0 publications

Incidence of Blossom-end Rot in Relation to the Water-soluble Calcium Concentration in Tomato Fruits as Affected by Calcium Nutrition and Cropping Season

Incidence of Blossom-end Rot in Relation to the Water-soluble Calcium Concentration in Tomato Fruits as Affected by Calcium Nutrition and Cropping Season

Influence of electric conductivity management on greenhouse tomato yield and fruit quality

Development of “stem-topple” disorder inRanunculus asiaticusis related to localised disturbances in tissue calcium levels

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