Some promising sources of expansion of the introduction potential of Prunus pumila L.

Prunus pumila L is an introduction species that is well cultivated in the steppe regions of Russia and is used as a rootstock for plums and apricots and less often as an independent fruit crop. The cultivation efficiency is reduced due to instability to rotting in regions with higher snow cover. The species naturally spread in North America, where it is represented by several varieties that differ in morphological characters. Representatives of var. susquehanae Willd. spread on acidic substrates and sometimes occur in wetlands and probably can increase the adaptive potential of the introduction population. According to the characteristic feature of this species is the dense short pubescence of young twigs, 2 genotypes were identified in the introduction population, probably representing descendants of var. susquehanae. These genotypes are valuable for further introduction studies in regions with problems in the cultivation of the species due to plant rotting.

Eilbert (Hazel) (Corylus maxima Mill.) bole culture on the tree-like rootstocks

The authors have proved the hazel cultivation efficiency in the world and Ukraine. The expediency of this crop growing on the rootstock has been substantiated on the basis of the expedionary inspections of the hazel bole plants revealed in Ukraine. The problems of the grafted plants bole height have been considered, the crown forms, their formation technology recommended as well as the trees planting plans in the orchard. The bole height has proved to influence not only the habit but also sprouting formation of the under the conditions of such an orchard exploitation period. It appeared that hen creating hazel industrial orchards on its tree-like rootstocks it is important to elaborate the crown forms and bole height the parameters of which would ensure high productivity, limit the crown habit and enable to mechanize the fruits collection. The spherical and spindle-like crowns are proposed that are formed on a certain bole height, the latter form differing from the former by a less frit branches amount orientated concerning the row area (5-8). Hazel industrial orchards with the bole culture at present it is mainly are recommended to be established using the planting plan 7-6 х 6-4 m. But when choosing a concrete plan, first of all, the cultivar vigour should be taken into account like under the as well as the crown form, bole height and the fact that this orchard practically does not need irrigation. It is possible to foresee with great probability that the habit parameters of a bush-tree crown can be regulated by the bole height like concerning other fruit crops. However, the final conclusion cannot be made so far because of the lack of the facts as regards cultivars. Besides, it is a bush-tree that is studied and such sign as early-ripening occurs in those constructions in different ways. The necessity is stressed of improving the technology of the hazel grafted planting trees reproduction.

Подбор сортов салата листового для выращивания в зимних теплицах в условиях Центральной Якутии

Определены сорта листового салата для выращивания в зимних теплицах методом подтопления в условиях Центральной Якутии, оптимальные по урожайности и качественным показателям, устойчивости к основным болезням и вредителям, проанализирован потребительский спрос. В опытах изучалось пять сортов и гибридов салата листового: Дубачек, Изумрудное кружево, Фанли F1, Азарт, Лифли F1. Опыты проводились в зимней остеклённой теплице общей площадью 324 м2, из них полезной площади 230 м2. Применяется органический субстрат на основе верхового сфагнового торфа, заправленный удобрениями и нейтрализованный до pH 5,56,0. В субстрат перед применением добавляется в качестве рыхлящего вещества агроперлит в соотношении 2:1. Повторность опытов четырёхкратная. Для выращивания рассады используются контейнеры на 64 и 54 ячейки, а для её выращивания до товарной спелости используются контейнеры с 8ю отверстиями, в которые вставляются стаканчики с рассадой. Установлено, что наиболее скороспелыми являются сорта Изумрудное кружево и Дубачек. Наибольшие показатели следующие: количество листьев у гибрида Фанли эффективность выращивания у сорта Дубачек (урожайность 4,15 кг/м2) масса одного растения у сорта Дубачек (155 г). Отмечено, что сорт Дубачек также является скороспелым и наиболее устойчивым к основным болезням листового салата.The varieties of leaf lettuce for growing in heated houses by the flooding method in the conditions of Central Yakutia optimal in terms of yield and quality indicators, resistance to major diseases and pests were determined consumer demand was analyzed. In the experiments five varieties and hybrids of leaf lettuce were studied: Dubachek, Izumrudnoe kruzhevo, Fanly F1, Azart, Lifli F1. The experiments were carried out in a winter glazed heated house with a total area of 324 m2 of which 230 m2 of useful area. An organic loadings based on highbog peat fertilized with fertilizers and neutralized to pH 5.56.0 is used. Before use agroperlite is added as a loosening agent in a 2:1 ratio to the substrate. The repetition of experiments is fourfold. Microgreen growing container for 64 and 54 cells for growing seedlings are used and for growing them to commercial ripeness containers with 8 holes are used into which cups of seedlings are inserted. It is established that the most early ripening varieties are Izumrudnoe kruzhevo and Dubachek. The greatest indicators are as follows: the number of leaves is in the Fanley hybrid cultivation efficiency in the Dubachek variety (yield 4.15 kg/m2) the mass of one plant is in the variety Dubachek (155 g). It is noted that the Dubachek variety is also early ripening and the most resistant to the main diseases of leaf lettuce.

ANALISIS USAHA PRODUKSI RUMPUT LAUT DENGAN METODE ANCAK

To be able to support the optimization of efforts to increase food security, innovation is required in improving the effectiveness of the flow of commodities through better coordination. One commodities Indonesia that has great potential but so far is still a little in note is Seaweed, Seaweed is one of the most widely used plant commodities and consumed in Indonesia. The results of seaweed cultivation efficiency study in Pekandangan Timur Village Bluto Sub-district of Sumenep Regency are: fixed cost in seaweed farming amounting to Rp 1575000 and variable cost Rp 316000 so the total cost of seawater production is Rp 1891000 Rp 540000 and profit Rp 1351000.Value R / C Ratio> 1 is 2.50 means Seaweed production farming in Pekandangan Timur Village Bluto Sub-District of Sumenep Regency is efficient and profitable because with capital 2.00 will be earned profit of Rp 2.50.