scholarly journals Concentration of Thiourea is effective in breaking the dormancy of potato (Solanum tuberosum L.) varieties

2021 ◽  
Vol 6 (2) ◽  
pp. 129-133
Author(s):  
Sambat Ranabhat ◽  
Madhav Dhital ◽  
Ansu Adhikari ◽  
Binod Adhikari ◽  
Saroj Shrestha
Keyword(s):  
Solanum Tuberosum L ◽  
Block Design ◽  
Potato Production ◽  
Dormancy Breaking ◽  
Tuber Dormancy ◽  
Potato Varieties ◽  
Randomized Block Design ◽  
Sprout Length ◽  
Breaking Dormancy ◽  
Thiourea Solution

Potato germination is highly sensitive to ecological conditions. High altitude and low annual average temperature result in tuber dormancy and poor sprouting. Dormancy has become a significant constraint for lowering potato production, which hinders the possibility of growing two crop cycles per year. An experiment was conducted from February to April 2020. Two major potato varieties (Desiree and Cardinal) were treated with four Thiourea concentrations (0, 1, 2, and 3%) in a two factorial, completely randomized block design with three replications. Tubers were soaked for 2 hours in different Thiourea solution as per treatments, air dried until excess solution was removed and kept in a dark room on plastic trays. With the progress of experiment dormancy breaking and sprouting parameters like early sprouting, dormancy breaking, sprout length and sprout density were recorded. It was found that Thiourea has a significant effect on all observed attributes as per varieties of potato. For Desiree variety, Thiourea (1%) decreased dormancy period by 22 days compared to control (Desiree*Thiourea 0%) and produced the longest average sprout of 7.36cm at 49 days after treatment (DAT). On the other hand, for the Cardinal variety, Thiourea (3%) decreased tuber dormancy by 27 days compared to control (Cardinal*Thiourea 0%) and produced sprout of 7.75 cm at 49 DAT. In case of sprouts/tuber 1% and 3% Thiourea produced 4.13 and 1.91 sprouts/tubers in Desiree and Cardinal, respectively. The overall mean finding indicate that, 1% and 3% Thiourea concentration was significantly superior for breaking dormancy and enhancing sprouting of potato varieties of Desiree and Cardinal respectively.

scholarly journals CONCENTRATION OF THIOUREA IS EFFECTIVE IN BREAKING THE DORMANCY OF POTATO VARIETIES

2020 ◽  
Author(s):  
Sambat Ranabhat ◽  
Madhav Dhital ◽  
Ramkrishna Subedi ◽  
Ansu Adhikari ◽  
Binod Adhikari ◽  
...  
Keyword(s):  
Block Design ◽  
Potato Production ◽  
Tuber Dormancy ◽  
Potato Varieties ◽  
Average Temperature ◽  
Randomized Block Design ◽  
Breaking Dormancy ◽  
Highly Sensitive ◽  
Thiourea Concentration ◽  
Annual Average Temperature

AbstractPotato germination is highly sensitive to ecological conditions. High altitude and low annual average temperature results in tuber dormancy and poor sprouting. Dormancy has become a significant constraint for lowering potato production that hinders the possibility of growing two crops per year. An experiment was conducted from February to April 2020, where two major potato varieties (Desiree and Cardinal) were treated with four concentrations of Thiourea (0, 1, 2, and 3%) in a two factorial completely randomized block design with three replications. Results showed that Thiourea has a significant effect on all observed attributes as per varieties of potato. For Desiree variety, Thiourea (1%) decreased breaking of dormancy by 22 days compared to control (Desiree*Thiourea 0%) and produced the longest average sprout of 7.36cm at 49 days after treatment (DAT). On the other hand, for the Cardinal variety, Thiourea (3%) decreased tuber dormancy by 27 days compared to control (Cardinal*Thiourea 0%) and produced a sprout of 7.75 cm at 49 DAT. In conclusion, for breaking dormancy and enhancing sprouting of potato varieties Desiree and Cardinal, Thiourea concentration of 1% and 3% is recommended, respectively.Author summaryThis work is the combined effort of all the authors; conceptualization and designing the plot experiments, S.R. and M.D.; performing the experiment and data collection, S.R. and A.A.; statistical analysis and preparation of presentation table and figure, S.R. and B.A.; writing the original draft and editing the whole manuscript, S.R., M.D., R.S., S.S., and A.A. All the author have read and agreed to the published version of the manuscript.

scholarly journals Effect of chemical treatments used for dormancy breaking on the number of stems and tubers of Hungarian potato varieties

2020 ◽  
Vol 24 (2) ◽  
Author(s):  
Ádám Esztergályos ◽  
Zsolt Polgár
Keyword(s):  
Gibberellic Acid ◽  
Vegetation Period ◽  
Climatic Conditions ◽  
Dormancy Breaking ◽  
Tuber Dormancy ◽  
Potato Varieties ◽  
Chemical Treatments ◽  
Dormancy Period ◽  
Breaking Dormancy ◽  
Number Of Stems

The length of tuber dormancy of potato varieties is an important factor in the profitability of the potato sector. Under temperate climatic conditions longer dormancy is more advantageous. However, in case of multiple planting within one growing season, in seed multiplication programs or during rapid post-harvest disease testing, breaking or shortening of dormancy is often needed. Numerous ways for chemical regulation of dormancy period were developed, but the efficiency of such methods is strongly genotype dependent. Recently a comparative study of chemical treatments for breaking tuber dormancy of some new Hungarian potato varieties was carried out. Continuing this work, here we report about the effects of chemical treatments used for breaking dormancy on the number of stems and tubers of progeny plants. The experiment was conducted in three consecutive vegetation period, with three varieties having different maturity type and different dormancy period: Balatoni rózsa, Botond and Démon. Treatments were performed using gibberellic-acid, benzyl-adenine and Rindite in different concentrations and combinations. After the dormancy period, tubers were planted into pots and grown under controlled conditions. Number of developed stems and tubers was counted. According to the results, applied treatments had a large effect on the number of developing stems and tubers of the progeny plants. Combined treatments of Rindite+gibberellic-acid, and gibberellic-acid at 100 ppm increased significantly the number of stems and tubers. Correlation between the efficiency of dormancy breaking and the number of developed tubers was found. Based on our data, Rindite and gibberellic-acid have an important role not only in breaking dormancy, but also in increasing the tuber number/plant. This positive effect could be utilized in seed potato production.

scholarly journals Comparative Evaluation of the Effects of Gibberellic Acid Concentrations on Dormancy Break in Tubers of Solanum chacoense

2020 ◽  
Vol 30 (1) ◽  
pp. 76-81
Author(s):  
Christian T. Christensen ◽  
Lincoln Zotarelli ◽  
Kathleen G. Haynes ◽  
Charles Ethan Kelly
Keyword(s):  
Gibberellic Acid ◽  
Solanum Chacoense ◽  
Alternative Methods ◽  
Average Weight ◽  
Dormancy Breaking ◽  
Tuber Dormancy ◽  
Department Of Agriculture ◽  
Time Treatment ◽  
Sprout Length ◽  
Breaking Dormancy

Solanum chacoense is a wild relative of potato (Solanum tuberosum) that is of interest because of its many desirable traits, but it exhibits variations in tuber dormancy across accessions. The objective of this study was to determine an appropriate gibberellic acid (GA3) concentration and soak time treatment to encourage sprout development across four accessions of S. chacoense (A, B, C, and D) from the 174 accessions of the U.S. Department of Agriculture Potato Genebank. Twelve treatments were created by using four concentrations of GA3 (0, 50, 100, and 150 μg·mL−1) across three soak periods (5, 45, and 90 minutes). Small (average weight, 1.4 g), medium (2.6 g), and large (5.6 g) tubers were distributed among all treatments. Percentage of tubers sprouted, time to sprouting, sprout length, and sprout number per tuber were analyzed to determine the effectiveness of GA3 treatments on dormancy breaking. GA3 concentrations of 50, 100, and 150 μg·mL−1 partially broke dormancy within accessions B and C. None of the tested treatments were effective for breaking dormancy in accession D within 46 days after treatment. Accession A showed weaker dormancy, thus producing a similar percentage of sprouted tubers across all GA3 treatments. Soak time had no significant effect on all parameters measured. Larger tubers produced greater sprout number per tuber and percentages of sprouted tubers. Soaking tubers in 50 μg·mL−1 of GA3 may be an effective treatment for S. chacoense accessions with mild dormancy, but alternative methods to break dormancy may be required for S. chacoense accessions with stronger dormancy.

Performance evaluation of Potato (Solanum tuberosum L.) varieties under Northern Plainsof India

2019 ◽  
Vol 6 (03) ◽  
Author(s):  
TS MISHRA ◽  
NK MISHRA ◽  
VK MISHRA ◽  
US MISHRA ◽  
HM SINGH
Keyword(s):  
Solanum Tuberosum ◽  
Growth And Development ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Climatic Conditions ◽  
Northern Plains ◽  
Plant Growth And Development ◽  
Potato Varieties ◽  
Randomized Block Design ◽  
Tuber Sprouting

A field experiment was conducted at Allahabad in order to evaluate the performance of different Potato (Solanum tuberosum L.) varieties under the climatic conditions of Northern Plains of India.The experiment was carried out for two consecutive years i.e., during 2015-16 and 2016-17to assess the morphology, physiological behaviour of these potato varieties/strains under a similar set of agro-climatic conditions. All the potato varieties/strainsviz.E-4486,JI-5857, JI-1804, JI-1808, JG-224, JG-657,JE-808, JF-110, JF-27, JF-547,JG-1134, Fr/B-10, JH-222, EM/H- 1601,JF-4864, JF-5106, JF-4915,JH-49,JH-516,JI-5871,FR-B-4,FR-B-4,FR/B-21,FR.B-105,G-2524,Kufri Sheetman, Kufri Chandramukhi, Kufri Bahar, Kufri Lalima, Kufri Badshah, Kufri Jyoti, Kufri Alankar and Kufri Sinduri were replicated thrice under randomized block design. Important information on different aspects like tuber sprouting, plant growth and development and yield was gathered in all the treatments.Potato variety JH-222 was the best performer followed by JG-224, E-4486, JF-547, Kufri Bahar, FR/B-10, Kufri Badshah, JF-110, Kufri Chandramukhi, EM/H-1601, Kufri Alankar, JF-27, JG-1334 and JE-808.

scholarly journals Performance of potato (Solanum tuberosum L.) varieties with and without straw-mulch at Shankharapur, Kathmandu, Nepal

2020 ◽  
Vol 3 (2) ◽  
pp. 193-204
Author(s):  
Kalyani Shrestha ◽  
Shrawan Kumar Sah ◽  
Reeti Singh ◽  
Yam Narayan Devkota
Keyword(s):  
Tuber Yield ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Medium Size ◽  
Tuber Weight ◽  
Potato Varieties ◽  
Straw Mulch ◽  
Crop Varieties ◽  
Randomized Complete Block Design ◽  
Benefit Cost

The suitability of crop varieties in a particular location determines the productivity of crops. A field experiment was conducted from February to May 2020 at Shankharapur, Kathmandu, Nepal to evaluate the growth and productivity of potato varieties with and without mulch. Five potato varieties (Cardinal, Janakdev, Khumal Bikas, MS- 42.3, Panauti Local) were evaluated under straw-mulch and no-mulch conditions. The treatments were arranged in two factorial Randomized Complete Block Design (RCBD) with 3 replications. The results revealed that the highest tuber yield was produced by Janakdev (34.29 t ha-1) followed by Panauti Local (29.52 t ha-1). Similarly, straw-mulch gave higher yield (25.9 t ha-1) as compared with no mulch condition (21.73 t ha-1). The higher tuber yield in the Janakdev and Panauti Local was because of higher tuber weight per hill, higher number and weight of medium size (50 -100 g) and oversize (> 100 g) tuber per hill. Similarly, higher yield in straw mulch was due to higher number and weight of tuber per hill. Higher gross return, net return was observed and the benefit cost ratioin varieties Janakdev (4.08) and Panauti Local (3.53) and rice straw mulch (2.88). Therefore, potato varieties Janakdev and Panauti Local with straw mulch are most suitable for Kathmandu like climate for improving productivity and profitability.

scholarly journals A review on potato microtuber storability and dormancy

2016 ◽  
Vol 8 (4) ◽  
pp. 2319-2324 ◽  
Author(s):  
Murlidhar J. Sadawarti ◽  
K. K. Pandey ◽  
B. P. Singh ◽  
R. K. Samadiya
Keyword(s):  
Significant Role ◽  
Carbon Disulphide ◽  
Potato Production ◽  
Storage Condition ◽  
Storage Conditions ◽  
Dormancy Breaking ◽  
Tuber Dormancy ◽  
Seed Potato Production ◽  
Sprouting Ability ◽  
And Storage

Potato microtubers plays important role in seed potato production technology as it has great advantage of storage, transport and mechanization due to their little size and reduced weight. Dormancy in potato microtubers is very important and storage conditions as well as size of microtubers influences the dormancy in microtubers. Increasing size of the micro-tuber resulted in significant increase in the viability and sprouting ability of microtubers with reduced durations of dormancy and weight loss at the end of storage. Small microtubers are more vulnerable to storage damage. The larger microtubers lost moisture content more slowly and retained firmness longer when stored at 40C. Development of dormancy during storage strongly affected by the storage condition especially the temperature regime, the presence of light and the relative humidity. The dormancy duration was linearly and inversely correlated with the length of storage. Storage containers and conditions are also important for microtuber storage. Endogenous hormones ABA, ethylene, cyokinin and gibberllic acid play a significant role in tuber dormancy regulation.Microtubers with thick diameter which have passed more times in dormancy and have better functionality than small microtubers with less time in dormancy. Growth regulators like gibberellic acid, thiourea, gibberllic acid + thiourea, randite and carbon disulphide plays significant role in dormancy breaking of microtubers.

scholarly journals Effect of Vermicompost and Compound inorganic Fertilizer on Soil Phosphate Availability and Yield of Potatoes (Solanum tuberosum L.) Grown in Andisols

Agrologia ◽  
2019 ◽  
Vol 8 (1) ◽  
Author(s):  
Reginawanti Hindersah ◽  
Agnia Nabila ◽  
Ani Yuniarti
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Soil Health ◽  
P Uptake ◽  
Chicken Manure ◽  
P Availability ◽  
Soil P ◽  
Randomized Block Design ◽  
Npk Fertilizer

Potatoes (Solanum tuberosum L.) which are comonly grown  in the highland with Andisols require organic and inorganic fertilizers to maintain soil health  and increase yield. The purpose of field experiment  was to obtain information on the effect of vermicompost with and without NPK fertilizer  on soil acidity,  soil phosphor (P) availability and P uptake in potatoes shoot; as well as yield and quality of tuber. The experimental design was a randomized block design with eight treatments and three replication. The treatment consisted of a combination of vermicompost doses (5 and 10 t/ha)  with NPK fertilizer doses (0; 0.5 t/ha and 1 t/ha). The two control treatments were 1) without fertilizer and 2) the method of fertilizing local farmers included 10 t /ha chicken manure and 1 t/ha NPK fertilizer. This experiment verified  that vermicompost and NPK fertilizer increased plant height as well as soil P availability and acidity compared to those of control. Vermicompost has not yet substitute chicken manure to obtain the same tuber production although the percentage of marketable tuber was quite similar.  Keywords : Andisols, NPK Fertilizer, Phosphorus, Potato, Vermicompost.

scholarly journals engaruh Dosis Pupuk NPK dan Ordo Tanah terhadap Kdd, Serapan K, dan Hasil Bibit Kentang (Solanum tuberosum L.) yang Diinokulasi Fungi Mikoriza Arbuskula dan Mycorrhiza Helper Bacteria

SoilREns ◽  
2016 ◽  
Vol 14 (2) ◽  
Author(s):  
Windy Amorita ◽  
Anne Nurbaity ◽  
Diyan Herdiyantoro
Keyword(s):  
Solanum Tuberosum ◽  
Combination Treatment ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Independent Effect ◽  
Soil Conditions ◽  
K Uptake ◽  
Seed Potatoes ◽  
Randomized Block Design ◽  
Npk Fertilizer

The productivity of potatoes in Indonesia is relatively low and unstable caused by unsuitable enviromental and soil conditions and bad cultivation system. This research was conducted to study the effect of NPK fertilizer dosages and soil order to soluble K, K Uptake, and yield of seed potatoes (Solanum tuberosum L.). The experiment design used a factorial randomized block design with two factors and three replication. The first factor was NPK fertilizer dosages with five levels (0, 25, 50, 75, 100% recomendation dosages) and the second factor was soil orders with two levels (Andisols and Inceptisols). The results of experiment showed that the interaction effect between NPK fertilizer dosages and soil orders had significantly effect to soluble K and K Uptake. There were independent effect of NPK dosages to diameter of potatoes tuber and independent effect of soils order to yield of seed potatoes. Andisols with 25% NPK and Inceptisols with 50% NPK were the best combination treatment to increase soluble K while treatment Inceptisols with 25% NPK was the best combination treatment to increase K Uptake. Dosages of 25% NPK was the best treatment to increase diameter of potatoes tuber while Inceptisols was the best treatment to increase yield of seed potatoes.Keywords : NPK Fertilizer Dosages, Andisols, Inceptisols, Potassium, Potatoes

scholarly journals REDUCING CHEMICAL FERTILIZER IN SWEET POTATO CULTIVATION BY USING MIXED BIOFERTILIZER

2021 ◽  
Vol 52 (4) ◽  
pp. 1031-1038
Author(s):  
Hindersah & et al.
Keyword(s):  
Sweet Potato ◽  
Block Design ◽  
Chemical Fertilizer ◽  
Nutrient Cycle ◽  
Sweet Potatoes ◽  
Available Nitrogen ◽  
Potato Varieties ◽  
Combined Application ◽  
Randomized Block Design ◽  
Phosphate Solubilizing

Biofertilizer enable to improve nutrient cycle in soil and induce plant growth and production, but sweet potatoes farmers in Indonesia are still use only chemical fertilizer as a source of plant nutrient. The objectives of this experiment were to evaluate the effect of different doses of consortium biofertilizer to reduce chemical fertilizer dose; and maintain yield and sweetness of two sweet potato varieties. The experimental design was completely randomized block design which tested six combinations of different chemical fertilizer and biofertilizer doses. Analysis of variance was performed to determine any significant differences between the means of treatments. The results showed that the response of both sweet potatoes varieties on combined application of chemical and bio fertilizer was differ. All treatments did not change tuber number and weight of sweet potato var. Awachy-1 but increased those of var. Rancing. Application of diazotrophic bacteria (Azotobacter, Azospirillum and Acinetobacter) mixed with phosphate solubilizing microbes (Pseudomonas and Penicillium) with reduced fertilizer doses up to 75% did not alter soil available nitrogen and phosphorous. Despite different fertilizer rates, tubers number of both sweet potato varieties in individual plot was similar. Yield did not change due to reduction of fertilizer dose up to 75% when biofertilizer was applied. However, yield was potentially decreased when chemical fertilizer was only 50%. All fertilizer treatments did not change the sweetness of tuber which indicated by constant brix. Research suggested that biofertilizer might substitute 25% of chemical fertilizer to obtain the same yield and quality of tuber, and maintain the availability soil nitrogen and phosphorous. 

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