scholarly journals Greening of potato tubers after harvest: effect of planting date and cultivar

2020 ◽  
Vol 9 (7) ◽  
pp. e105973971
Author(s):  
Vlandiney Eschemback ◽  
Aline Marques Genú ◽  
Jackson Kawakami
Keyword(s):  
Climatic Factors ◽  
Planting Date ◽  
Potato Cultivars ◽  
Southern Brazil ◽  
Light Conditions ◽  
Potato Tubers ◽  
Planting Dates ◽  
Yield And Quality ◽  
And Storage

The different potato planting dates in southern Brazil have different climatic factors that affect the yield and quality of the tubers produced. The objective of this work was to test the effect of planting date and potato cultivars on the postharvest greening of tubers. The treatments consisted of three planting dates (October, December, and February) and three potato cultivars (Agata, BRS Clara, and BRS F63 Camila). It was observed that the tubers harvested in February were less susceptible to greening, probably due to the higher physiological maturity of the tubers produced in this planting date. Tubers of cv. BRS Clara had lower greening than the tubers of the other cultivars. In addition to the light conditions, the cultivar and storage air temperature are also important factors that affect greening rates. Care must be taken with these factors to avoid losses of tubers by greening.

EFFET DES DATES DE PLANTATION SUR LES POMMES DE TERRE CULTIVEES EN SAISONS COURTES

1981 ◽  
Vol 61 (2) ◽  
pp. 417-424
Author(s):  
R. RIOUX ◽  
H. GENEREUX ◽  
J. GOSSELIN
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Total Yield ◽  
Planting Date ◽  
Tuber Size ◽  
Tuber Growth ◽  
Potato Tubers ◽  
Planting Dates ◽  
Chipping Quality

The effect of planting dates on growth and quality of potato tubers (Solanum tuberosum L.) grown on a wet and cold soil was studied. Ninety days after planting, total yield was higher in plots planted in mid-June than in those planted at the end of May. However, 110 days after planting, yield was higher with the earlier planting dates. Yield at 130 day s after planting was not significantly different from yield at 110 days after planting. Tuber growth ended on 15 Sept. in 1975 and on 30 Sept. in 1974 and 1976. Percentage of tubers 70 mm and more in size was four times higher at 110 than at 90 days after planting for cv. Kennebec at the first planting date. Increase in tuber size was lower for cvs. Norland and Netted Gem and for all other planting dates. In spite of a low increase of specific gravity, chipping quality decreased as harvest was delayed. Percentage of tubers bearing Rhizoctonia sclerote increased as harvesting was delayed.

PENGARUH WAKTU TANAM SORGUM PADA SISTEM TUMPANGSARI TEMBAKAU TERHADAP SIFAT AGRONOMIS DAN KIMIAWI TEMBAKAU

2020 ◽  
Vol 8 (2) ◽  
pp. 67
Author(s):  
ABDUL RACHMAN
Keyword(s):  
Nicotiana Tabacum ◽  
Block Design ◽  
Growth Yield ◽  
Planting Date ◽  
Planting Dates ◽  
Plot Size ◽  
Yield And Quality ◽  
Randomized Block Design ◽  
Total P

<p>Percobaan lapang telah dilakukan di Kebun Percobaan Pekuwon, Bojonegoro, 1992, untuk mcmpelajai sifat-sifat agronomis dan kimiawi tembakau pada berbagai waktu tanam sorgum pada sistem tumpangsai tembakau + sorgum. Percobaan disusun dalam rancangan acak kelompok dengan enam ulangan. Perlakuan terdiri dai 5 taraf waktu tanam sorgum yaitu 4 dan 2 minggu sebelum tanam tembakau, bersamaan dengan waktu tanam tembakau, 2 dan 4 minggu setelah tanam tembakau. Ukuran petak 10.8 m x 12.0 m. dengan 240 tanaman tembakau per petak dan 720 tanaman sorgum per petak. Analisis N, P, K, nikotin, dan gula beturut- turut dengan Kyeldhal, Spektrofotometi, Flamefotometi, Titrasi dengan NaOH dan Luff-Schroll. Hasil percobaan menunjukkan bahwa dengan mempcrcepat waktu tanam sorgum dari 4 minggu setelah tanam tembakau menjadi 4 minggu sebelum tanam tembakau sangat menurunkan pertumbuhan, hasil dan mutu. Scbaliknya perlakuan tersebut meningkat¬ kan kadar N-total, P, dan K, dan hasil sorgum tumpangsai, serta tidak berpengaruh pada kadar nikotin, gula, nisbah/nikotin, dan N/nikotin tembakau. Pada keadaan kering yang dialami oleh percobaan ini walaupun hasil tembakau rendah namun mutu hasil masih dalam kisaran yang baik dan persaingan dikuasai oleh tanaman sorgum.</p><p>Kata kunci: Nicotiana tabacum, sorgum bicolor, tumpangsai, waktu tanam</p><p> </p><p><strong>ABSTRACT</strong></p><p><strong>Agronomics and chemicals properties of tobacco under different planting dates ofsorghum in tobacco -Horghum intercropping system</strong></p><p>The ield expeiment was conducted at Pekuwon Expeimental Station, Bojonegoro, in 1992, to study the agronomic and chemical propeties of tobacco grown under diferent planting dates of sorghum in tobacco+sorghum intercropping system. The expeiment was arranged in randomized block design, with 6 replications. The treatment consisted of 5 levels of sorghum planting, 2 and 4 weeks ater tobacco planting. Plot size was 10.8 m x 12.0 m, with 240 and 720 plants of tobacco and sorghum respectively. The methods for analyses N, P, K, nicotine and sugar analyses were Kyeldhal, Spectrophotometry, Flame photometry, Titration with NaOH, and Luf-Schroll, respectively. The growth, yield, and quality of tobacco were decreased sharply, but the N, P, K contents of the leaves were increased by accelerating planting date of sorghum from 4 weeks ater to 4 weeks before tobacco planting. The content of nicotine, sugar, sugar/nicotine. N/nicotine of the leaves were not afected by this treatment. In dry condition, although the yield of tobacco was low, but the quality was in good category, and the competition in tobacco ♦ sorghum intercropping system was dominated by sorghum.</p><p>Key words : Nicotiana tabacum, sorghum bicolor, intercropping, planting date</p>

scholarly journals Characterization of Streptomyces scabies isolates from potato tubers its pathogenic variations in Rawalpindi District

2014 ◽  
Vol 4 (1) ◽  
pp. 1-6
Author(s):  
S. Shazia ◽  
F. Naz ◽  
A. Rauf ◽  
M. Inam-ul-Haq ◽  
S. Bushra
Keyword(s):  
Solanum Tuberosum L ◽  
Economic Loss ◽  
Streptomyces Scabies ◽  
Potato Tubers ◽  
Yield And Quality ◽  
Isolation And Characterization ◽  
Pathogenic Variation ◽  
Important Disease

Potato (Solanum tuberosum L.) has various biotic constraints in its production due to pest attack. Among these, common scab caused by streptomyces scabies is an important disease in potato which causes economic loss with respect to plant yield and quality of tubers. The present study was conducted to determine the pathogenicity, pathogenic variation, characterization of morphological, physiological and biochemical aspects of Streptomyces associated with potato tubers grown in Rawalpindi district. Severity data and pathogenic variation of disease was studied by using different isolation and characterization techniques.

scholarly journals EFFECT OF BIOFERTILIZER AND COMPOST ON NITRATE STATUS, YIELD AND QUALITY OF POTATO TUBER UNDER NEWLY RECLAIMED SANDY SOIL

AGROFOR ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
S.F. EL-SAYED ◽  
A.A. GAHRIB ◽  
Rasha R. EID
Keyword(s):  
Sandy Soil ◽  
Control Treatment ◽  
High Yield ◽  
Potato Tubers ◽  
Treatment Control ◽  
Mineral Fertilization ◽  
Marketable Yield ◽  
Yield And Quality ◽  
Compost Treatment

This investigation was carried out during the two summer seasons of 2015 and2016 in sandy soil on potato culitvar "Sante" to study the effect of using 100%compost (15 t/fed.) and 50% compost + nitrogen fixing bacteria (Azotobacter, andPseudomonas alone or together) on potato yield and quality as compared to theconventional mineral fertilization (120-75-150 kg/fed. NPK + 5 toncompost/fed.(control)). No significant differences in tubers yield/fed. were detectedbetween mineral fertilization (control) and using 100% compost (15t/fed).However, control treatment significantly produced a high yield per feddan,more than using 50% compost + any biofertilizer treatment.Using composttreatment at 15 t/fed.execeed all biofertilizer treatments in marketable yield in bothseasons, but without significant differences as compared with mineral fertilization(control).No significant differences in tuber dray matter and content of starch intuber were found between using compost treatment at 15 ton/fed. and mineralfertilization treatment (control)in both seasons. Nevertheless, application of 50%compost+ 4 applications of Azotobacter and Pseudomonas had the highest tuberconcentrations of starch and nitrogen with significant differences as compared withthe mineral fertilization.Using50% compost + 4 applications of Azotobacter orPseudomonas or both (Azotobacter + Pseudomonas )and application of 100%compost caused producing potato tubers with the lowest concentration of nitratewith significant differences as compared with the mineral fertilization. Nosignificant differences were detected between mineral and organic fertilizersconcerning P and K concentrations in tubers.

scholarly journals Урожайность различных сортов картофеля и их повреждение вредителями в условиях Удмуртской Республики

2020 ◽  
Author(s):  
O.V. Esenkulova ◽  
О.V. Korobeinikova ◽  
M.P. Maslova
Keyword(s):  
Insect Pests ◽  
Potato Cultivars ◽  
Organic Fertilizers ◽  
Agrotis Segetum ◽  
Potato Tubers ◽  
White Grub ◽  
Severe Damage ◽  
Planting Material ◽  
Udmurt Republic

В рамках развития органического сельского хозяйства актуально выявление сортов с высокой устойчивостью к вредным организмам. В условиях Удмуртской Республики на дерново-среднеподзолистой среднесуглинистой слабосмытой почве в 2017-2018 годах проводились исследования, целью которых была оценка новых и перспективных сортов картофеля различных по срокам созревания. Одной из задач было выявление повреждений клубней вредителями. Изучали сорта картофеля разных сроков созревания: раннеспелые Нандина, Ред Соня, Колетте, Беллароза, Винета, Джоконда, Раноми среднеспелые Джелли, Вираж, Гала, Рябинушка, Каптива, Алуэт позднеспелые Ред Фентази, Церата КВС, Танго. Полевой однофакторный опыт закладывался согласно методике полевого опыта. Клубневой анализ проводили в соответствии с ГОСТ 33996-2016 Картофель семенной. Технические условия и методы определения качества. Коэффициент адаптивности изучаемых сортов картофеля рассчитан по методу Л.А. Животкова. За два года исследований более урожайными были раннеспелые сорта: Нандина, Ред Соня, Беллароза, Раноми среднеспелые: Джелли, Каптива, Алуэт позднеспелые: Ред Фентази и Церата КВС. Повреждение клубней картофеля личинками щелкуна (проволочником) было очень высоким и составило в 2017 году в среднем по сортам 47, в 2018 году 61. В оба года исследований клубни были повреждены личинками озимой совки (в среднем 3-4 ), личинками майского хруща (1-2 ). В 2018 году наблюдалось повреждение полевками (в среднем по сортам 3 ). Раннеспелые сорта являются более адаптивными к условиям Удмуртской Республики (коэффициент адаптивности 1,22 и 1,31). Однако качество посадочного материала не соответствует ГОСТ по проценту повреждений вредителями. Поэтому необходима тщательная сортировка и доведение клубней до регламентируемых показателей. Для снижения поврежденности в полевых условиях картофель требуется размещать после бобовых и крестоцветных культур, проводить известкование почв и вносить перепревшие органические удобрения.As part of the development of organic agriculture, the identification of varieties with high resistance to pests is relevant. In the conditions of the Udmurt Republic, studies were carried out in 2017-2018 on the derno-medium-soil average carbon-free weak soil, the purpose of which was to assess new and permissive potato cultivars of different maturation times. One challenge was to identify damage to tubers by insect pests and the possibility of using them as planting material. Potato cultivars of different maturation dates were studied: early Nandina, Red Sonya, Kolette, Bellaroza, Vineta, Dzhokonda, Ranomi medium Dzhelli, Virazh, Gala, Ryabinushka, Kaptiva, Aluet late Red Fentazi, Tserata KVS, Tango. Field one-factor experiment was laid according to the method of experimental work. Tuberous analysis was carried out in accordance with GOST 33996-2016 Seed Potatoes. Technical conditions and methods of quality determination . The coefficient of adaptivity of the studied potato cultivars is calculated according to the method of L.A. Zhemkov. More crop-producing were early cultivars: Nandina, Red Sonya, Bellaroza, Ranomi average: Dzhelli, Kaptiva, Aluet late: Red Fentazi and Tserata CF. During the years of research, there was damage to potato tubers by wireworm in 2017 on average 47, and in 2018 61. The only cultivar, Ranomi, was not damaged by the wireworm in 2017. A small number of tubers was damaged by larvae of turnip moth (Agrotis segetum) (3-4) and larvae of white grub (1-2). During two years of research in the Udmurt Republic early cultivars were more adaptive, the coefficient of adaptability was 1,31 and 1,22. However, the quality of the planting material by the percentage of damaged tubers by pests does not comply with state standard. For growing in the region, early cultivars Nandin, Red Sonya, Kolette, Bellarosa, Vineta, Dzhokonda, Ranomi are more suitable from middle cultivars Dzhelli, Kaptiva and Aluet turned out to be more stable from late ripening Red Fentazi. Due to severe damage by insect pests, especially wireworms, careful sorting and bringing tubers to regulated parameters, liming of soils, and introduction of rotted organic fertilizers are necessary, as well as to place potatoes in crop rotation after legumes and cruciferous crops.

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