DERIVATION AND ASSESSMENT OF DRIS NORMS FOR GREENHOUSE TOMATOES

1989 ◽  
Vol 69 (3) ◽  
pp. 1027-1035 ◽  
Author(s):  
J. CARON ◽  
L. E. PARENT
Keyword(s):  
Lycopersicon Esculentum ◽  
Dry Matter ◽  
Critical Value ◽  
Integrated System ◽  
Carbon Accumulation ◽  
Nutrient Ratios ◽  
Tomato Plants ◽  
Nutrient Ratio ◽  
Greenhouse Tomato ◽  
Greenhouse Tomatoes

Diagnosis and recommendation integrated system (DRIS) norms were developed in Quebec from the 30% top yielding plants among 733 observations on marketable yields and foliar analyses of spring-grown greenhouse tomato plants. These crops produced between 4 and 6.5 kg plant−1 cumulated over 8 wk of harvest. Fifteen optimum nutrient ratios and concentrations were computed from N, P, K, Ca and Mg analytical results. DRIS norms developed irrespective of plant developmental stage were less sensitive than norms developed for selected sampling periods. Including a dry matter index in DRIS did not modify the nutrient ranking of independent samples, but DRIS and the critical value approach produced different diagnoses. The dry matter index may not only help in the separation of limiting from nonlimiting nutrient but can also become an indicator for modifying carbon accumulation in tomato plants. Since DRIS describes numerically the nutrient equilibrium in plants, fertigation regimes could be adapted to the actual plant requirements.Key words: Tomato, Lycopersicon esculentum L., tissue diagnosis, nutrient ratio, diagnosis and recommendation integrated system.

scholarly journals Fate of nitrogen-15 in the subsequent growing season of greenhouse tomato plants (Lycopersicon esculentum Mill) as influenced by alternate partial root-zone irrigation

RSC Advances ◽  
2017 ◽  
Vol 7 (55) ◽  
pp. 34392-34400 ◽  
Author(s):  
Maomao Hou ◽  
Fenglin Zhong ◽  
Qiu Jin ◽  
Enjiang Liu ◽  
Jie Feng ◽  
...  
Keyword(s):  
Lycopersicon Esculentum ◽  
Root Zone ◽  
Growing Season ◽  
Tomato Plants ◽  
Residual Nitrogen ◽  
Greenhouse Tomato ◽  
Lycopersicon Esculentum Mill ◽  
Crop Uptake ◽  
Previous Season ◽  
Fate Of Nitrogen

Alternate partial root-zone irrigation has profound impacts on the crop uptake of residual nitrogen originated from the previous season.

Irrigation of greenhouse tomatoes grown in "Harrow" peat-bags

1991 ◽  
Vol 71 (3) ◽  
pp. 947-949 ◽  
Author(s):  
Athanasios P. Papadopoulos ◽  
Chin S. Tan
Keyword(s):  
Lycopersicon Esculentum ◽  
Key Words ◽  
Environmental Conditions ◽  
Total Yield ◽  
Fruit Size ◽  
Irrigation Frequency ◽  
Marketable Yield ◽  
Greenhouse Tomato ◽  
Greenhouse Tomatoes ◽  
Fertilizer Solution

Three spring and two fall crops of greenhouse tomato (Lycopersicon esculentum L. Mill; various cultivars) grown in "Harrow" peat bags were irrigated 1, 4, 8 or 16 times daily. All plants received the same volume of fertilizer solution which varied with time from 0.2 to 1.0 L plant−1 d−1 according to crop and environmental conditions. The results showed little or no effect of irrigation frequency on early or total yield, number of grade no. 1 fruit, or fruit size. Key words: Lycopersicon esculentum, marketable yield

scholarly journals EFFECT OF VAPOR PRESSURE DEFICITS ON TRANSPIRATION OF GREENHOUSE TOMATO PLANTS

HortScience ◽  
1994 ◽  
Vol 29 (4) ◽  
pp. 252e-252
Author(s):  
Laurent Gauthier ◽  
Maher Trigui ◽  
André Boisvert ◽  
Mohamed Benmoussa
Keyword(s):  
Vapor Pressure ◽  
Control Strategy ◽  
Tomato Plants ◽  
Greenhouse Tomato ◽  
Significant Difference ◽  
Greenhouse Tomatoes

Transpiration is essential to the performance of tomato plants. In greenhouses, transpiration can be impeded by low vapor-pressure deficits (VPD). An experiment was conducted to measure the effect of VPD on transpiration rates for greenhouse tomatoes grown on a nutrient film. Four treatments were applied: high (0.8 kpa) day and night VPDs; high day and low night (0.4 kPa) VPDs; low day and low night VPDs; and variable VPDs. The VPD was controlled using fogging and ventilation. Hourly transpiration values were recorded. Results show a significant difference between treatments. The measured transpiration rates were compared to the values calculated with a transpiration model. A good fit between measured and calculated values was observed. The model is being used within a dynamic VPD control strategy.

Utilization of treated swine wastewater for greenhouse tomato production

2004 ◽  
Vol 50 (2) ◽  
pp. 77-82 ◽  
Author(s):  
J. Cheng ◽  
T.E. Shearin ◽  
M.M. Peet ◽  
D.H. Willits
Keyword(s):  
Oxygen Demand ◽  
Value Added ◽  
High Strength ◽  
Integrated System ◽  
Treated Wastewater ◽  
Swine Wastewater ◽  
Tomato Production ◽  
Tomato Plants ◽  
Greenhouse Tomato ◽  
Marketable Fruit

An integrated system has been developed to recycle waste organics and treated wastewater from a swine farm to make value-added products and to protect the environment from potential contamination. The farm is a farrow-to-wean swine operation with approximately 4,000 sows. A high-strength wastewater (chemical oxygen demand, 18,000 mg/l; total Khejdal nitrogen, 1,600 mg/l; total phosphorus, 360 mg/l) is produced from the swine operation. An ambient-temperature anaerobic digester has been used to treat the swine wastewater and to produce biogas (from an average 475 m3/day in winter to 950 m3/day in summer). The biogas is combusted in an engine to produce electricity (around 900 kW-hr/day). The digester effluent that is rich in nutrients (N, P, and minerals) is then utilized for fertigation for greenhouse tomato production. A trickling nitrification biofilter has been developed to convert ammonium in the effluent into nitrate. The nitrified anaerobic effluent is used as both fertilizer and irrigation water for approximately 14,400 tomato plants in greenhouses. Experimental data indicate that the tomato greenhouses have used approximately 12 m3 of the effluent and 3.84 kg nitrogen per day. At the same time, the greenhouses have a daily yield of 520 kg (37 g/plant) of marketable fruit.

scholarly journals The influence of chitin-urea amendments applied to an organic soil on a Meloidogyne hapla population and on the growth of greenhouse tomato

2005 ◽  
Vol 76 (2) ◽  
pp. 75-80 ◽  
Author(s):  
G. Bélair ◽  
N. Tremblay
Keyword(s):  
Lycopersicon Esculentum ◽  
Shoot Growth ◽  
Organic Soil ◽  
Dosage Effect ◽  
Meloidogyne Hapla ◽  
Root Knot Nematode ◽  
Tomato Plants ◽  
Amended Soils ◽  
Greenhouse Tomato ◽  
Leaf Tissues

This experiment was conducted under greenhouse conditions to evaluate the efficiency of chitin-urea amendments to an organic soil against a Quebec population of the northern root-knot nematode (Meloidogyne hapla) and to assess the pathogenicity of this population on tomato (Lycopersicon esculentum). Chitin-urea amendments at 0.2 and 0.4% (vol:vol) were ineffective in reducing the preplant nematode populations. The final M. hapla egg populations were significantly increased in chitin-urea amended soils, and a signifiant positive dosage effect was recorded. Shoot growth of tomato plants was significantly reduced by M. hapla but was increased by chitin-urea. At harvest, fruit weights were neither affected by M. hapla nor by chitin-urea amendments. The final M. hapla egg population was linked to lower N and P levels, and to higher Ca levels in leaf tissues.

scholarly journals EFFETS DE LA COMPOSITION DU SUBSTRAT TOURBEUX ET DU VOLUME DES SACS DE CULTURE SUR LA PRODUCTIVITÉ DE LA TOMATE DE SERRE

1990 ◽  
Vol 70 (2) ◽  
pp. 585-590 ◽  
Author(s):  
ROCK OUIMET ◽  
JOSÉE CHARBONNEAU ◽  
ANDRÉ GOSSELIN ◽  
LÉON-ÉTIENNE PARENT ◽  
JACQUES BLAIN ◽  
...  
Keyword(s):  
Water Stress ◽  
Lycopersicon Esculentum ◽  
Plant Density ◽  
Root Zone ◽  
Fruit Weight ◽  
Tomato Cultivar ◽  
Substrate Composition ◽  
Greenhouse Tomato ◽  
Blossom End Rot ◽  
Greenhouse Tomatoes

A large-fruited greenhouse tomato cultivar (Lycopersicon esculentum Mill. ’Dombello’) was grown in 12-, 24- and 36-L bags containing three types of peat:perlite substrates (85:15, 70:30 and 55:45, vol:vol). The control consisted of 36-L bags containing peat only. Plant density was three plants per bag, i.e. 3.22 plants m−2. Early and total yields of marketable and nonmarketable fruits were measured. Early yields were higher for plants grown in 12- or 24-L bags as compared to those grown in 36-L bags, although blossom-end rot followed the same trend. Seasonal cumulative yields were not influenced significantly by bag size and substrate composition. Reduced perlite content and bag size increased the incidence of blossom-end rot. The incidence of blossom-end rot and average fruit weight indicate that reduction of root-zone volume and air porosity increased water stress. Greenhouse tomatoes can be grown successfully in smaller bag sizes containing peat substrate amended with more than 15% perlite.Key words: Tomato, peat-lite substrates, root-zone restriction, blossom-end rot, fruit weight, grow bag

scholarly journals Diagnosis and Recommendation Integrated System Norms and Sufficiency Ranges for Tomato Greenhouse in Mediterranean Climate

HortScience ◽  
2018 ◽  
Vol 53 (4) ◽  
pp. 479-482 ◽  
Author(s):  
Alfonso Llanderal ◽  
María Teresa Lao ◽  
Juana Isabel Contreras ◽  
María Luz Segura
Keyword(s):  
Slight Modification ◽  
Large Change ◽  
Mediterranean Area ◽  
Integrated System ◽  
Nutrient Ratios ◽  
Phenological Stage ◽  
Phenological Stages ◽  
Mature Leaves ◽  
Crop Development ◽  
Greenhouse Tomatoes

The objectives of this study were to compute diagnosis and recommendation integrated system (DRIS) norms and sufficiency ranges from a survey of tomato crops grown in Mediterranean greenhouses and the verification of their variation during plant growth and development. DRIS norms were computed from 408 samples of first young mature leaves collected during different phenological stages. Using the DRIS technique, two sufficiency ranges were developed: one includes all the database regardless of the phenological stage, and the other was developed based on the phenological stage. Also, ten DRIS norm nutrient ratios and cv were computed from N, P, K, Ca, and Mg analytical results. All the ratios in flowering (FL), and only N/K, Mg/K, and Mg/N in fruit development (FD), showed low cv and therefore may play a fundamental role in crop development in accord with the DRIS norms calculated. It is also necessary to point out that a slight modification in the nutrient concentration led to a large change in the nutritional balance of the plant. Moreover, the general sufficiency ranges developed were: N (25–48), P (2.6–4.7), K (16–31), Ca (23–36), and Mg (6.7–10 g·kg−1). In conclusion, this work may signify an improvement in the nutritional diagnosis of greenhouse tomatoes in the Mediterranean area, because there is great variability when setting DRIS standards and sufficiency ranges based on phenological stages compared with general DRIS norms and sufficiency ranges. Use of DRIS norms and sufficiency ranges will allow better nutritional adjustment based on the phenological stage of the crop.

Evaluation of tomato hybrids with different level of ripe rate under hydroponic conditions (fitopyramide)

2020 ◽  
Author(s):  
M.N. AL-Rukabi ◽  
◽  
V.I. Leunov
Keyword(s):  
Mineral Nutrient ◽  
Tomato Plants ◽  
Agricultural Method ◽  
Seedling Germination ◽  
Greenhouse Tomatoes ◽  
Hydroponic Conditions ◽  
Nutrient Solutions ◽  
Variety Testing

Greenhouse tomatoes are divided into early, medium and late-maturing. The days from seedling germination to the first harvest are taken into account. Tomato has a huge potential for heterosis in terms of precocity, overall yield, signs of resistance and uniformity. The preferred agricultural method is hydroponics, which allows you to grow plants without using soil, only using mineral nutrient solutions in water. The cultivation of tomato plants on the " Fitopyramida " will allow to sell their products in the periods with the highest realized prices. An experiment on variety testing of 11 tomato hybrids of different product groups that differ in precocity allowed us to select the most adapted to the conditions of the " Fitopyramida " technology, including the indeterminate beef Ruddy ball F1, cherry hybrids Elf F1 and orange-fruited cherry Magic harp F1. the determinant hybrid Captain F1 showed Good results.

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