Influencing seed tuber yield of Ranger Russet and Shepody potatoes with gibberellic acid

1993 ◽  
Vol 70 (9) ◽  
pp. 667-676 ◽  
Author(s):  
Loretta J. Mikitzel
Keyword(s):  
Gibberellic Acid ◽  
Tuber Yield ◽  
Seed Tuber ◽  
Ranger Russet

Gibberellic Acid and Ethephon Alter Potato Minituber Bud Dormancy and Improve Seed Tuber Yield

2010 ◽  
Vol 88 (2) ◽  
pp. 167-174 ◽  
Author(s):  
Oktay Külen ◽  
Cecil Stushnoff ◽  
Robert D. Davidson ◽  
David G. Holm
Keyword(s):  
Gibberellic Acid ◽  
Tuber Yield ◽  
Seed Tuber ◽  
Bud Dormancy

scholarly journals Transplanting Hybrid Potato Seedlings at Increased Densities Enhances Tuber Yield and Shifts Tuber-Size Distributions

2021 ◽  
Author(s):  
Luuk C. M. van Dijk ◽  
Michiel E. de Vries ◽  
Willemien J. M. Lommen ◽  
Paul C. Struik
Keyword(s):  
Tuber Yield ◽  
Seed Tuber ◽  
Total Yield ◽  
Cropping System ◽  
Potato Production ◽  
Size Class ◽  
Planting Density ◽  
And Shifts ◽  
Very High ◽  
Ridge System

AbstractTo contribute to the development of a novel cropping system for potato grown from greenhouse-derived seedlings from hybrid true potato seeds, planting density trials were carried out under normal Dutch agronomic conditions. For two consecutive years, 5-week-old seedlings of two experimental genotypes were transplanted into farmers’ potato production fields at two contrasting locations: a flat-bed system on sandy soil and a traditional ridge system on clay soil. Planting densities were 6.25, 12.5, 25, 50, 100 and 200 plants/m2 in the flat-bed system, and 3.125, 4.688, 6.25, 12.5, 25 and 50 plants/m2 in the ridge system. In general, increasing planting density of hybrid seedlings per area decreased tuber fresh weight per plant and reduced the number of tubers per plant. On a per hectare basis, an increased planting density resulted in increased total tuber yield and number of tubers up to very high densities, but finally both parameters levelled off. Highest total tuber yields harvested were 107 and 45 Mg/ha for the flat-bed and ridge system, respectively. On flat-beds, the optimal planting density for total yield was 50 plants/m2. On ridges, planting density interacted with year and genotype, resulting in an optimum planting density of 25 plants/m2 to reach the maximum total yield. Obtained yields in the commercial size classes Baby Baker (20 < size class ≤ 35 mm) and Seed Tubers (28 < size class ≤ 50 mm) were in general very high on the flat-beds, with a maximum Seed Tuber yield of 64 Mg/ha at 50 plants/m2. The current study showed that transplanted hybrid seedlings are feasible alternatives for seed-tuber-grown systems for certain potato outlets.

scholarly journals EFFECT OF GIBBERELLIC ACID ON GROWTH, TUBER YIELD AND QUALITY IN POTATOES (Solanum tuberosum L.)

2021 ◽  
Author(s):  
Sevgi ÇALIŞKAN ◽  
Mohammad Samım HASHEMI ◽  
Mustafa AKKAMIŞ ◽  
Ramazan İlhan AYTEKİN ◽  
Mehmet BEDİR
Keyword(s):  
Solanum Tuberosum ◽  
Gibberellic Acid ◽  
Tuber Yield ◽  
Solanum Tuberosum L ◽  
Yield And Quality

Unmarketable Tuber Yield and Other Agronomic Parameters of Four Varieties of Irish Potato (Solanum tuberosum L.) as Influenced by NPK Fertilizer Rate and Type of Seed Tuber at Samaru, Nigeria

2008 ◽  
Vol 1 (1) ◽  
pp. 26-33
Author(s):  
B.A. Babaji ◽  
E.B. Amans ◽  
U.F. Chiezey ◽  
A.M. Falaki ◽  
B. Tanimu ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Tuber Yield ◽  
Seed Tuber ◽  
Solanum Tuberosum L ◽  
Irish Potato ◽  
Fertilizer Rate ◽  
Npk Fertilizer

Effect of the developmental stage of potato seedlings on recovery after transplanting to the field and on tuber yield

1995 ◽  
Vol 124 (2) ◽  
pp. 213-218 ◽  
Author(s):  
C. Engels ◽  
J. Schwenkel ◽  
R. El Bedewy ◽  
B. Sattelmacher
Keyword(s):  
Gibberellic Acid ◽  
Tuber Yield ◽  
Nile Delta ◽  
Potato Seed ◽  
True Potato Seed ◽  
Assimilate Partitioning ◽  
Solatium Tuberosum ◽  
Below Ground ◽  
Dim Light ◽  
Lateral Branches

SUMMARYUnder the short-day conditions and cool temperatures prevailing from January to March in the Nile delta, Egypt, potato (Solatium tuberosum) seedlings grown from true potato seed formed tubers in the nursery when the plants were less than 5 cm in height. In order to examine the hypothesis that slow field establishment after transplanting and low tuber yields of these seedlings were caused by premature tuberization, different treatments to delay tuberization were applied in the nursery before transplanting.Increasing the air and soil temperature in the nursery accelerated both the development of the above-ground and below-ground shoot organs, but did not improve field establishment of the seedlings after transplanting. Extension of the photoperiod with incandescent dim light, exogenous application of gibberellic acid (GA), and removal of the shoot apex to encourage the growth of lateral branches from the leaf buds increased biomass allocation to the above-ground shoot organs, decreased tuberization in the nursery and accelerated field establishment of transplanted seedlings. Extension of the photoperiod was the most effective treatment to delay tuberization, and doubled the final tuber yield from transplanted seedlings.The results are in agreement with the hypothesis that poor field establishment and low final tuber yields from potato transplants may be caused by the presence of strong tuber sinks at transplanting, which reduce assimilate partitioning towards the roots and above-ground shoots.

scholarly journals Influence of Phosphorus Fertilizer on Potato Seed Production in Acid Soils in Kenya

2020 ◽  
Vol 9 (2) ◽  
pp. 101
Author(s):  
Evans Mutange Akoto ◽  
Caleb O. Othieno ◽  
Julius O. Ochuodho
Keyword(s):  
Potato Tuber ◽  
Seed Potato ◽  
Tuber Yield ◽  
Seed Tuber ◽  
Germination Percentage ◽  
Total Carbon ◽  
Available Phosphorus ◽  
Potato Seed ◽  
Phosphorus Fertilizer ◽  
Soil Available Phosphorus

One of the major challenges facing potato (Solanum Tuberosum L) production in Kenya is the inadequate supply of high-quality seed. The required amount of potato seed in Kenya is about 70,000 tones annually but, only 1 % is available. Otherwise, farmers use low quality farm saved seed (KEPHIS, 2016). A major contributor to this situation is low and declining soil fertility, particularly phosphorus, among other challenges. Unfortunately, there is no available phosphorus fertilizer rate recommendation for seed potato production in Kenya. This hinders economic utilization of phosphorus fertilizers to achieve optimal production of quality potato seed in Kenya where its deficiencies are dominant. Therefore, this study investigated influence of different rates of phosphorus fertilizer on seed potato tuber yield and quality in three acidic (pH &le; 5.8) test sites: Lari, Ainabkoi and Saboti sub Counties. Unica and Shangi varieties were tested. The field experiment was a split plot arrangement in Randomised Complete Block Design (RCBD) with six treatments (0 N &amp; 0 P), 0, 30, 60, 90 and 120 kg ha-1 phosphorus, replicated three times. Data collected included tuber weight, number of tubers, tuber grade, number of eyes per tuber, tuber specific density and final germination percentage. To monitor soil nutrient dynamics, soil pH, soil available phosphorus, total nitrogen, total carbon, potassium, calcium, magnesium, copper, iron, zinc, sodium and exchangeable acidity (Lari only) were determined at planting while available phosphorus and potato tuber phosphorus were determined at harvesting. Data was statistically analysed using ANOVA at 5 % confidence levels with General Statistics (GENSTAT) and excel softwares. Results indicated that phosphorus rate significantly influenced seed tuber yield in the test sites. At Saboti, (0N &amp; 0P) and no phosphorus application treatments for Shangi and Unica resulted in the highest seed tuber yield of 33.7 t ha-1 and 33.2 t ha-1, respectively. At Ainabkoi, application of 60 kg ha-1 and 30 kg ha-1 phosphorus produced the highest seed tuber yields of 20.0 t ha-1 and 18.9 t ha-1 of Shangi and Unica, respectively. In Lari, application of 60 kg ha-1 and 90 kg ha-1 phosphorus produced the highest seed tuber yields of 19.0 t ha-1 and 10.4 t ha-1 of Shangi and Unica, respectively. Unica had better final germination percentage than Shangi. During the season, there was a build-up of soil available phosphorus. Thus, there is need for farmers to test their soils at the onset of every potato season.

scholarly journals The effects of tuber size and chitting method on the growth and yield of Amyla and Barima potatoes

1973 ◽  
Vol 45 (3) ◽  
pp. 297-318
Author(s):  
Eero Varis
Keyword(s):  
Tuber Yield ◽  
Seed Tuber ◽  
Starch Content ◽  
Tuber Size ◽  
Growth And Yield ◽  
Lower Percentage ◽  
Average Yield ◽  
Small Seed ◽  
The Difference ◽  
Number Of Stems

The effects of two seed tuber sizes on the growth and the yield of the potato when using various methods of chitting were studied in 1963—66. The cultivars used were Amyla and Barima. The variations affected by seed size were not directly proportional to the seed weight. From small seed the early development of the haulms was slower, the number of stems smaller, the weight of the haulms and roots smaller. The number of tubers per hill was lower but the number of tubers per stem higher. Average yield per seed tuber was 16 per cent smaller. Small seed produced a slightly higher starch content and a lower percentage of blight infected tubers. Plants from large seed tubers developed faster and the weight of their haulms and roots declined more in the autumn. In the early liftings also the tuber yield per hill was distinctly larger than from small seed, but in the case of the earlier cultivar Barima the difference was fully levelled out by the autumn. Chitting made the early growth faster, decreased the number of stems, reduced the weight of the haulms and roots and decreased the number of tubers per hill. The average increases of yield and starch content were not significant but were dependent on cultivar and lifting time. When chitting was employed the amount of large tubers increased and scab infection decreased. In many respects Amyla and Barima reacted differently both to seed tuber size and to chitting.

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