scholarly journals Optimizing N Fertilization to Improve Yield, Technological and Nutritional Quality of Tomato Grown in High Fertility Soil Conditions

Plants ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 575 ◽  
Author(s):  
Domenico Ronga ◽  
Alfonso Pentangelo ◽  
Mario Parisi
Keyword(s):  
N Fertilization ◽  
Fruit Yield ◽  
Soil Conditions ◽  
High Fertility ◽  
Marketable Yield ◽  
Tomato Crop ◽  
Processing Tomato ◽  
Yield And Quality ◽  
N Rates

Processing tomato is the second most important worldwide cash crop, generally produced in high-input systems. However, fruit yield and quality are affected by agronomic management, particularly nitrogen (N) fertilization, whose application to indeterminate growth genotypes for canning has yet to be investigated in depth. Hence, the objective of this work was to assess the effects of different N rates (0, 50, 125, 200, 275, and 350 kg ha−1) on fruit yield and quality characteristics of processing tomato ‘San Marzano’ landrace. The results of our study showed that 125 and 200 kg of N ha−1 are the most appropriate rates in soil with high fertility, ensuring the highest values of marketable yield and brix yield. However, plants fertilized with 125 kg of N ha−1 attained higher values of N efficiency and fruit K and P concentrations than plants fertilized with 200 kg of N ha−1. Our results suggest that overdoses of N supplies negatively affected fruit yield and quality of San Marzano landrace grown in high soil fertility conditions, also reducing the agricultural sustainability. Hence, specific agronomic protocol and extension services are required to optimally manage tomato crop systems.

scholarly journals Effects of Combination Between Nitrogen and Potassium Fertilization on Yield and Quality of Valencia Orange Fruits

2019 ◽  
Vol 12 (1) ◽  
pp. 38
Author(s):  
Hien Huu Nguyen ◽  
Toan Nguyen Tai
Keyword(s):  
Fruit Juice ◽  
N Fertilization ◽  
Fruit Weight ◽  
Fruit Yield ◽  
Yield And Quality ◽  
Valencia Orange ◽  
K Fertilization ◽  
Juice Content ◽  
Fruit Diameter

Nitrogen (N) and potassium (K) are the most important nutrients for fruit yield and quality of citrus. Farmers - growing orange is usually applied high rates of N and K fertilizers. The study was carried out during 2017 and 2018 production year on a 4-year Valencia orange. The objective of the present paper was to evaluate the effect of combination between nitrogen and potassium on fruit yield and quality of Valencia orange. The experiment was used three doses of N (0.5, 1.0, and 1.5 kg/tree) in form of urea and three doses of K (0.6, 0.9, and 1.2 kg/tree) in form of potassium chloride in all combinations. The obtained results showed that N and K concentrations in soil did not increase with increment of N and K fertilization. Increment of N and K fertilization increased N content but did not increase K content in leaves. Fruit weight, fruit diameter and peel thickness increased with increasing of N fertilization. Maximum fruit yield of Valencia orange was attained with rates of 0.5 kg N/tree combined with 0.9 kg K/tree. Juice content increased with increasing amount of N fertilization. Increment of K fertilization tend to increase total acidity in fruit juice. The highest TSS and TSS/TA were attained with rates of 0.5 kg N/tree combined with 0.9 kg K/tree.

scholarly journals The Influence of Nitrogen Rate and Timing on `Beauregard' Sweetpotato Yield and Quality

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 758G-759
Author(s):  
Jonathan R. Schultheis ◽  
W.R. Jester ◽  
Charles W. Averre
Keyword(s):  
North Carolina ◽  
N Fertilization ◽  
Nitrogen Rate ◽  
Fertilization Program ◽  
N Application ◽  
Yield And Quality ◽  
N Rates

Sweetpotato yield and quality are influenced by a N fertilization program. These studies were conducted to evaluate the effect that different N rates and application times had on the yield and quality of Beauregard roots. Three experiments were conducted in separate locations in North Carolina: One in 1992 to evaluate N rates of 28 to 56 kg·ha–1; and two in 1994 that evaluated nitrogen rate and time of N application. In 1994, N timing using single applications (21, 28, and 35 days after planting) were compared with split applications (10–21 and 21–35 days after planting). Also, in 1994, N rates for the season was varied from 0 to 42 kg·ha–1 comparing single and split applications. No yield differences were detected when N rate was varied from 14 to 56 kg·ha–1. However, the application of at least 14 kg N/ha increased yield when compared with the control (0 kg N/ha). The highest yield of US #1 marketable roots was obtained when all N was applied at 21, 28, or 35 days compared with split applications made at 10 and 21 days after planting. Roots tended to be shorter with single vs. split N applications.

scholarly journals Effects of Root-volume Restriction and Salinity on the Fruit Yield and Quality of Processing Tomato

2008 ◽  
Vol 77 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Takeshi Saito ◽  
Naoya Fukuda ◽  
Takuya Iikubo ◽  
Shuji Inai ◽  
Takashi Fujii ◽  
...  
Keyword(s):  
Fruit Yield ◽  
Root Volume ◽  
Processing Tomato ◽  
Yield And Quality

THE EFFECT OF MUNICIPAL WASTEWATER IRRIGATION AND RATE OF N FERTILIZATION ON PETIOLE COMPOSITION, YIELD AND QUALITY OF OKANAGAN RIESLING GRAPES

1989 ◽  
Vol 69 (4) ◽  
pp. 1285-1294 ◽  
Author(s):  
G. H. NEILSEN ◽  
D. S. STEVENSON ◽  
J. J. FITZPATRICK
Keyword(s):  
Municipal Wastewater ◽  
N Fertilization ◽  
Wastewater Irrigation ◽  
Soluble Solids ◽  
Well Water ◽  
Yield And Quality ◽  
Vitis Sp ◽  
N Treatment ◽  
N Rates

Okanagan Riesling (Vitis sp.) vines, planted on a sandy soil in 1983, were trickle irrigated with municipal wastewater or well water and with each source of water there were 3 rates of N fertilization (0, 17 and 34 g N as NH4NO3 vine−1 y−1), 1984–1987. The zero-N treatment was increased to 8.5 g N vine−1 in 1986–1987. Wastewater-irrigated vines had increased petiole P, K and Ca but decreased Mg and in 2 of 3 yr decreased N in August. Increased rate of N fertilization increased petiole N at bloomtime but not in August, had minor effects on petiole P, K, Ca and Mg, and increased petiole Mn at highest N rates, especially (2 of 4 yr) in association with wastewater irrigation. Yield increased both for vines irrigated with wastewater and linearly with rate of applied N in 2 of the 3 fruiting years. Increased yield was not associated with increased petiole N concentration in August. Minor increases in soluble solids and juice pH of grapes at harvest were measured for wastewater-irrigated grapes in 2 yr. No horticultural limitations to the use of this wastewater to irrigate Okanagan Riesling grapes were observed over the 4-yr period.

scholarly journals In-row Distances and Nitrogen Fertilization Programs for ‘Tasti-Lee’ Specialty Tomato

2010 ◽  
Vol 20 (3) ◽  
pp. 579-584
Author(s):  
Bielinski M. Santos ◽  
John W. Scott ◽  
Maricruz Ramírez-Sánchez
Keyword(s):  
Solanum Lycopersicum ◽  
Nitrogen Fertilization ◽  
N Fertilization ◽  
Fruit Yield ◽  
Marketable Yield ◽  
Total N ◽  
Marketable Fruit ◽  
N Rates

‘Tasti-Lee’™ (‘Fla. 8153’) is the first tomato (Solanum lycopersicum) released in Florida exclusively for the premium specialty market, with characteristic superior flavor and elevated lycopene concentration. Research was conducted to determine the appropriate nitrogen (N) fertilization and in-row distances for ‘Tasti-Lee’ tomato and thus improving the opportunities for successful adoption for this cultivar. Three N fertilization programs and two in-row distances were tested. Total N rates (204, 239, and 274 lb/acre) were the result of the combination of 50 lb/acre of N during prebedding plus each of the following drip-applied N fertilization programs: 1) 1.5 and 2.0 lb/acre per day from 1 to 4 weeks after transplanting (WAT) and 5 to 12 WAT, respectively; 2) 1.5, 2.0, and 2.5 lb/acre per day during 1 to 2 WAT, 3 to 4 WAT, and 5 to 12 WAT; and 3) 1.5, 2.5, and 3.0 lb/acre per day during 1 to 2 WAT, 3 to 4 WAT, and 5 to 12 WAT, respectively. In-row distances were 18 or 24 inches between plants, providing 5808 and 4356 plants/acre. Early and total marketable yields of ‘Tasti-Lee’ tomato were influenced by in-row distances and N fertilization programs, but not by their interaction. The highest early marketable fruit yield was found in plots treated with the highest N rate among fertilization programs (+6%), and in plots planted 18 inches apart (+7%) in comparison with the lowest N rate and the 24-inch spacing. Tomato plots treated with the highest N rate (274 lb/acre) resulted in the largest total marketable yield (+8%). Among the in-row distances, when plants were transplanted 18 inches apart, tomato total marketable yield increased by 18% compared with 24 inches between plants.

Effects of nitrogen fertilization on fruit yield and quality of processing tomatoes

2004 ◽  
Vol 84 (3) ◽  
pp. 865-871 ◽  
Author(s):  
J. Warner ◽  
T. Q. Zhang ◽  
X. Hao
Keyword(s):  
Lycopersicon Esculentum ◽  
Nitrogen Fertilization ◽  
Fruit Size ◽  
N Fertilization ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Fertilizer N ◽  
Marketable Yield ◽  
Available N ◽  
Processing Tomato

Four processing tomato (Lycopersicon esculentum Mill.) cultivars (CC337, H9230, H9492 and H9553) were field-grown in southwestern Ontario using five N fertilization rates in each of 4 yr (0, 50, 100, 150 and 200 kg N ha-1 in 1999 and 0, 100, 150, 200 and 250 kg N ha-1 in 2000, 2001 and 2002). Total fruit yield increased linearly as N rate was increased except in 2001, which was a dry year. Responses of marketable yield to fertilizer N rate were dependent on cultivar and the year. In years when sufficient soil water was available, N fertilizer rates of 200 kg ha-1 or higher were required to produce the maximum marketable yield for the four cultivars. In the dryer years, the response to fertilizer N rate was cultivar dependent, and the application of 150 to 200 kg N ha-1 was sufficient to maximize marketable yield. Fertilizer N above the rate required for maximum marketable yield increased green fruit yield at harvest. Nitrogen rate did not affect the soluble solids (SS) content, firmness, size or colour of marketable fruit. Differences in yield and fruit quality were noted among cultivars. H9553 was the highest-yielding cultivar. H9230 had the largest fruit size. CC337 generally had the best red fruit colour and the lowest percent SS. H9492 generally had the highest percent SS. To attain maximum marketable yields, it appears that N rates should be adjusted based on cultivars, anticipated rainfall levels and availability of irrigation. Key words: Lycopersicon esculentum, processing tomato, nitrogen fertilization, yield, quality

Fruit yield and quality of Dhakki date as affected by fresh and stored pollens of potential male genotypes

2019 ◽  
Vol 51 (5) ◽  
Author(s):  
Muhammad Iqbal ◽  
Khalid Usman ◽  
Shakeel Ahmad Jatoi ◽  
Muhammad Munir
Keyword(s):  
Fruit Yield ◽  
Yield And Quality
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