https://repository.utm.md/handle/5014/8303 2026-04-21T19:05:02Z https://repository.utm.md/handle/5014/35979 The substantiation of technology and development of technical means for seeding of row crops SCLEAR, Piotr; MELNIC, Iurie; Lîsîi, Radu; GHEORGHIȚA, Andrei Under conditions of Moldova, the SUPN-8 are the main seeders for sowing row crops. According to the experience and long-term tests of this type of seeders imported in the Republic of Moldova, the seeders do not fully meet the ATR requirements. The percentage of maize plants located at the established planting distance decreases from 45 to 34% when the speed of the seed drill increases. The second characteristic of the most seeders is the process of continuous formation of a furrow with a discrete seed laying, which requires large amounts of energy for make a sowing furrow. Improving the seeding technology and creating the seeding technique able to make the discrete sowing of the row crops at high speeds and with a high degree of planting uniformity at a given planting distance, represents an urgent task. In this context, the no till planting technology of row crops using direct planting of seeds in the holes by the rotary-type seeders is of particular interest. 2018-01-01T00:00:00Z https://repository.utm.md/handle/5014/35977 Влияние орошения на рост, развитие и продуктивность подсолнечника МАЦКОВА, Светлана; ПАЗЯЕВА, Татьяна; ГУМАНЮК, Алексей Многие ученые и практики говорят о том, что система капельного орошения способствует подаче воды в таком количестве, что необходимо в данный период развития растения. При этом есть возможность контроля стрессовых условий, управляя влагой, то есть основным лимитирующим фактором жизни растений. Основная цель исследований: изучение параметров поливного режима подсолнечника при капельном орошении и определение влияния орошения на рост, развитие и продуктив ность культуры. А также определение такого показателя, как коэффициент суммарного испарения, показывающего, сколько тратится воды на формирование тонны продукции в разные по влагообеспеченности годы. Проводились наблюдения за ростом, развитием, формированием урожая подсолнечника в зависимости от режима орошения. Погодные условия в период наблюдений за подсолнечником были нестабильными, что сказалось как на росте, развитии, так и урожайности культуры. Установили, что на орошаемых участках почвенная влага, как правило, расходуется намного эффективнее, что является фактором обеспечения более высокой продуктивности подсолнечника.; Many scientists and practitioners say that the drip irrigation system helps supplywater in such quantities as is necessary at a given period of plant development. At the sametime, it is possible to control stress conditions by managing moisture, that is, the main limiting factor in plant life. The main goal of the research: to study the parameters of the sunflower irrigation regime with drip irrigation and determine the effect of irrigation on the growth, development and productivity of the crop. And also to determine of such an indicator as the coefficient of total evaporation, which shows how much water is spent on the making of a ton of products in years of different moisture availability. Observations of the growth, development, and formation of the sunflower crop depending on the irrigation regime were carried out. Weather conditions during the period of observation of sunflower were unstable, which affected both the growth, development and yield of the crop. It has been established that in irrigated areas, soil moisture, as a rule, is spent much more efficiently, which is a factor in ensuring higher sunflower productivity.   2024-01-01T00:00:00Z https://repository.utm.md/handle/5014/35973 Cercetarea sistemului de acţionare a maşinii de plantat răsaduri de tip carusel. MELNIC, Iurie În prezenta lucrare ne-am propus drept obiectiv principal determinarea legii mișcării capătului tijei verticale de împingere a fixatoarelor de pe caruselul mașinii de plantat. 2007-01-01T00:00:00Z https://repository.utm.md/handle/5014/35972 Calculul parametrilor constructivi ai paletei pentru creşterea răsadului MELNIC, Iurie; MELNIC, Angela În articol sunt prezentate principalele categorii de ghivece şi metoda de calculare a parametrilor de calcul ai ghivecelor şi casetelor pentru creşterea răsadului. În rezultatul cercetărilor teoretice a fost obţinută corelaţia matematică pentru determinarea forţei de tracţiune a răsadului din ghivece. Au fost stabiliţi parametrii de calcul ai ghivecelor şi casetelor.; The main categories of pots are presented and the method of calculation of the design parameters of pots and cassette for seedling growing is proposed. As a result of theoretical research the basic mathematical relation for determination of the drawing power of seedling from pot have been obtained. The design parameters of the pot and cassette have been settled. 2009-01-01T00:00:00Z