The length of the tubers dormant period of some potato varieties and their hybrids in the conditions of the Leningrad region

2020 ◽  
Vol 1 (85) ◽  
pp. 121-124
Author(s):  
Vera Lebedeva ◽  
◽  
Nadim Gadzhiev ◽  
Andrey Ivanov ◽  
◽  
...  
2020 ◽  
pp. 18-20
Author(s):  
Т.Э. Остонакулов ◽  
А.А. Шамсиев

В 2017–2019 годах изучены сортообразцы сладкого картофеля на староорошаемых лугово-сероземных почвах Зарафшанской долины. Цель исследований – комплексная оценка сортообразцов батата в условиях Зарафшанской долины по скороспелости, росту, развитию, интенсивному размножению, формированию урожая, компактности клубней в гнезде, продуктивности, урожайности и лежкости клубней и выделение из них перспективных, а также разработка приемов агротехнологии получения высоких урожаев для данных условий. Почвы опытного участка характеризуются благоприятными агрофизическими и водными свойствами и низким содержанием гумуса, нитратного азота, подвижного фосфора и содержанием обменного калия от низкого до среднего. Сравнивали 18 сортообразцов батата. Выделенные сортообразцы изучали при ширине междурядий 70 и 90 см со схемой 70×25 и 90×20 см по 1, 2 и 3 растения в гнезде. Для получения рассады сортообразцов батата брали по 40 клубней и высаживали 20–22 февраля в пленочной теплице при температуре 15–18 °C, заделывая их на глубину 3–5 см. Влажность почвы поддерживали на уровне 65–70%. Через 7–10 дней после высадки почки начинают прорастать, а через 43–48 дней формируется рассада высотой 12–15 см, готовая для высадки в поле. Высадка рассады, как и других рассадных культур (томата, перца, баклажана) – по схеме 70×20–25 см во второй-третьей декаде апреля. Уход включал в себя междурядную обработку (культивация), прополку, борьбу с сорняками, подкормку, поливы. Уборка урожая – в конце сентября-начале октября с помощью картофелекопателя. В результате исследований выделились сорта по скороспелости, дружности формирования ростков, ускоренному размножению, продуктивности, компактности клубней в гнезде и с высоким товарным урожаем – Сочакинур, Хар-Бей и Япон. Возделывание этих сортообразцов по схеме 70×25 и 90×20 см способствует получению товарного урожая высокого качества не менее 43–48 т/га. In 2017–2019, studies were conducted on the study of varieties of sweet potatoes on old-irrigated meadow-gray-earth soils of the Zarafshan valley. The purpose of the research is a comprehensive assessment of sweet potato varieties in the conditions of the Zarafshan valley in terms of early maturity, growth, development, intensive reproduction, yield formation, compactness of tubers in the nest, productivity, yield and keeping quality of tubers and the selection of promising ones, as well as the development of methods of agricultural technology for obtaining high yields for given conditions. The soil is characterized by favorable agrophysical and water properties and low content of humus, nitrate nitrogen, mobile phosphorus and a low-average content of exchange potassium. Eighteen sweet potato varieties were compared. The selected variety samples were studied with a row spacing of 70 and 90 cm with a scheme of 70×25 and 90×20 cm for 1, 2 and 3 seedlings in the nest. To obtain seedlings of sweet potato varieties, 40 tubers were taken and planted on February 20–22 in a film greenhouse at a temperature of 15–18 °C, seeding to a depth of 3–5 cm, the soil moisture was maintained at 65–70%. 7–10 days after planting, the buds began to germinate, and after 43–48 days, seedlings were formed with a height of 12–15 cm, which is ready for planting in the field. Planting seedlings in the field is carried out, as well as other seedlings (tomato, pepper, eggplant) according to the scheme 70x20–25 cm in the second or third decade of April. Growing includes inter-row processing (cultivation), weeding, weed control, top dressing, watering. Harvesting in late September, early October with a potato digger. As a result of the research, varieties were identified in terms of early maturity, sprout formation, accelerated reproduction, productivity, compactness of tubers in the nest and ensuring a high marketable yield – Sochakinur, Xar-Bey, and Japon. The cultivation of these varieties according to the scheme 70×25 and 90×20 cm contributes to the production of a commodity crop at 43–48 t/ha with good qualities.


2020 ◽  
pp. 31-38
Author(s):  
MARINA E. DIYKANOVA ◽  
◽  
ALEKSANDR G. LEVSHIN ◽  
IRINA N. GASPARYAN ◽  
NATALIA F. DENISKINA ◽  
...  

In the Moscoww region, frosts are quite probable to return until the fi rst decade of June. To protect potatoes from the returning cold weather, it is possible to use a temporary covering material in the “planting – seedling emergence” period. The authors have studied the use of covering materials on early potato varieties of Udacha, Zhukovsky early, Red Scarlet, Snegir’, and Meteor. Studies have been conducted on the test plot of the Vegetable Growing Department of Russian State Agrarian University – Moscow Timiryazev Agricultural Academy in 2017-2019. Non-woven white and black material of the same density of 17 g/m2 was used for covering. No covering was used in the check variant. The cultivation technology was standard,it included tillage (plowing, spring tillage, and cutting ridges before planting), as well as plant care (inter-row cultivation and hilling-up). Planting was carried out with a single-row potato planter. The earliest emergence of seedlings was observed under white covering material with a diff erence of 5-6 days in relation to the check variant. In the variant with a black covering material, the diff erence averaged 3-4 days. Due to covering, planting was carried out earlier than expected and the crop was formed by July 15. The interphase period between potato planting and seddling emergence decreased, while that from seddling emergence to harvesting increased, consequently, the yield increased by 11.6…14.7%. The maximum yield was obtained with the Red Scarlet variety using the white covering material, the minimum – in the check variant without covering. The same trend is typical for other varieties. It has been established that covering with any material has a positive eff ect on the duration of the potato growing season and the yield by increasing the period of tuberization. Covering allows getting early potato varieties 2 weeks earlier in the Moscow region.


2014 ◽  
Vol 176 (1) ◽  
pp. 59-67
Author(s):  
L. I. Kostina Kostina ◽  
◽  
O. S. Kosareva Kosareva ◽  
Keyword(s):  

Author(s):  
S. A. Eselevich ◽  
V. D. Balunov ◽  
V. A. Kolesnikova

Generalized experience in a large enterprise, in which stood a group of workers requiring additional medical care after periodic health examination.


Author(s):  
В.Д. Балунов ◽  
◽  
В.А. Колесникова ◽  
С.А. Еселевич ◽  
О.В. Верещагина ◽  
...  
Keyword(s):  

2012 ◽  
Vol 46 ◽  
pp. 298-305 ◽  
Author(s):  
A. D. Potemkin ◽  
T. Ahti

Riccia marginata Lindb. was described by S. O. Lindberg (1877) from the outskirts of the town of Sortavala near the north shore of Lake Ladoga, Republic of Karelia, Russia. The species has been forgotten in most recent liverwort accounts of Europe, including Russia. Lectotypification of R. marginata is provided. R. marginata shares most characters with R. beyrichiana Hampe ex Lehm. It differs from “typical” plants of R. beyrichiana in having smaller spores, with ± distinctly finely areolate to roughly papillose proximal surfaces and a narrower and shorter thallus, as well as in scarcity or absence of marginal hairs. It may represent continental populations of the suboceanic-submediterranean R. beyrichiana, known in Russia from the Leningrad Region and Karelia only. The variability of spore surfaces in R. beyrichiana is discussed and illustrated by SEM images. A comparison with the spores of R. bifurca Hoffm. is provided. The question how distinct R. marginata is from R. beyrichiana needs to be clarified by molecular studies in the future, when adequate material is available. R. marginata is for the time being, provisionally, included in R. beyrichiana.


2012 ◽  
Vol 46 ◽  
pp. 269-273
Author(s):  
L. E. Kurbatova ◽  
E. G. Leushina

The new records of 10 rare moss species of sanctuary “Vaaramaenselka Ridge” (Leningrad Region) are given. New data on the 2 moss species [Homalothecium sericeum (Hedw.) Bruch et al., Mnium hormun Hedw.] included in Red Data Book of Nature of the Leningrad Region are obtained.


2018 ◽  
Vol 52 (1) ◽  
pp. 101-121 ◽  
Author(s):  
V. M. Kotkova

The paper provides the data on aphyllophoroid fungi of the State Nature Reserve «Kurgalsky» situated in the Kingisepp District of the Leningrad Region. The list includes 285 species annotated by data on their habitats, substrates and frequency. In total 25 species protected in the Leningrad Region and 3 species protected in Russian Federation were found in the protected area. Chaetodermella luna, Phlebia subochracea and Trechispora stevensonii are published for the first time for the Leningrad Region. The specimens of selected species are kept in the Mycological Herbarium of the Komarov Botanical Institute RAS (LE).


2020 ◽  
Vol 54 (1) ◽  
pp. 73-86
Author(s):  
V. M. Kotkova

The paper provides new data on aphyllophoroid fungi of the State Nature Reserve “Kurgalsky” situated in the Kingisepp District of the Leningrad Region. They were collected on the Kader bog and its vicinity. The list includes 165 species annotated by data on their habitats, substrates and frequency, including 37 species new for the reserve. In total 5 species (Antrodia mellita, Chaetoporellus latitans, Junghuhnia collabens, Rigidoporus crocatus, Sidera lenis) protected in the Leningrad Region and 3 species (Phlebia subserialis, Pseudomerulius montanus, Xenasma pruinosum) new for the Leningrad Region were found in study part of reserve. The specimens of selected species are kept in the Mycological Herbarium of the Komarov Botanical Institute RAS (LE).


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