Leningrad Petersburg

Before the beginning of the summer season for many gardeners and farmers of St. Petersburg and Leningrad region raises the question: repair or mend the old greenhouse, or make a gift and buy a new, modern greenhouse or greenhouse? We offer a series of articles with an overview of the major variants of greenhouses and polytunnels in our city. The modern market of St. Petersburg in this segment is quite saturated. Sometimes it can even be slightly confused by the large the number of proposed greenhouse.

First of all, you must determine what is needed: a greenhouse or hothouse. Typically, greenhouses used for growing seedlings, followed by transplanting into the open ground. Sometimes in greenhouses can be made a full cycle of growth in early crops (usually a radish, lettuce, etc.). The main prize in his small greenhouse footprint. Greenhouse can be put on almost any garden. Simplicity of design allows quickly set up a greenhouse, and if necessary remove the deposit.

Of course, depending on the material frame greenhouse, requires some storage space in the economic construction or under a canopy. Ten years ago bulk truckers used greenhouses with wood or wire frame and coated with polyethylene film. In our opinion, except for cheap, these products do not have any privileges. Every spring comes buy new film, repairing dilapidated wooden frame or rusted and rotten carcass of a wire. In addition, such hotbeds not retain heat due to gapping of the film to the frame. As each summer resident wants to gather a great harvest in their area, the greatest demand for use greenhouses. Greenhouse – greenhouse construction, intended for the cultivation of vegetable crops, as well as an early distillation of greenery and flowers. In the greenhouse, the plant is from seed sowing to harvest. In addition, in the greenhouse can be removed several harvests per season. Greenhouse can be done independently, but is it worth wasting time and stuff lumps from his mistakes.

To date, the producers of St. Petersburg, among which holds a strong position Group of Companies “Anta”, make ready the greenhouse, assembling them and deliver Constructor sets that do not require much effort at self-assembly. However, whatever decision you do not accept, when building their own greenhouses or purchase standard greenhouses need to reflect on the important points: material necessary to cover the greenhouse to ensure sufficient light transmission and durability, as well as ease of installation;-how to organize the ventilation system, heating system and water plants in the greenhouse;, as will be distributed inside the area in the greenhouse (a breakdown in the garden or installing shelving). When choosing the size of a greenhouse is necessary to determine how much space in the garden of you are willing to contribute to the greenhouse. Available on the market Ready greenhouses often have dimensions 2×3; 3×4, 3×6 m. Many companies manufacture greenhouses in order to required sizes, but one should bear in mind that any non-standard product is greatly increased in value since requires adjustment of equipment and additional labor. Height greenhouse should provide movement on it in full growth, as well as the normal circulation of air for ventilation. The standard height of most horticultural greenhouses is not less than 2 meters. The following publications, the analysis offered in the St. Petersburg market frameworks of greenhouses and hothouses ready from the manufacturer.

Oriental Hybrid

Modern foreign varieties of lilies are obtained using special methods and techniques of great interest for local breeders, and new technological solutions are applied at all stages hybridization process, as well as introductions. Most important information about the nature of inheritance of traits in lilies. Today in this area the following is known. Hybrids have a dominant Asian presence ticking on parts of perianth, dark-red inhibits orange, yellow and orange. The gene that causes the appearance of reduced anther gene is associated with deformity of the flower. Albinism seeds – a recessive trait, occurring in the Asian lilies Martagon and hybrids.

Banter-left pochkolukovichki recessive trait for Asian and for tubular lilies. Yellow and orange coloration in the throat tubular flowers white dominates. Y Oriental Hybrid white suppressed pink and red. Gold in a gloss, no stains on the proportions, dwarfing recessive traits. The study of the nature of inheritance is associated with considerable difficulties.

Thus, in the case of incomplete dominance backcross not give the desired results. Among the hybrid lilies are forms, the occurrence of which is the result of several genes that work cumulatively. That is, For example, the character of the heritage gation following traits – plant height, flowering, shape and orientation of the flower bulb shape. Breeders say the high ability of some lilies to transfer their positive qualities the so-called seed cleaning gene. The search for such plants generally begin with a study of parental pairs, which were obtained from the best varieties of lilies. Careful selection of a combination of signs is necessary in order to understand which of Parents "responsible" for the appearance. excellent hybrids. The most studied plant parental cultivar 'Connecticut King' ('Connecticut King'). It is known that halo in the middle of the perianth parts he got from the yellow variety liter. Wilson, resistance to diseases of the yellow liter. Tiger. Also, breeders are aware that the use of 'Connecticut King' as the mother plant dignity usually occur only among the descendants of second or even third generation. Best results are obtained when taking the pollen of this variety: seedlings transferred to a good fabric texture of shares in the color of the flower appear pure tones and secondary colors. Typically, the program crossbreeding include a combination of inbreeding and out-breeding. First is the restoration of a series of hazardous crossings, where lilies are used in different regions. Then the selected seedlings are crossed with one another, inbreeding may continue up to obtain pure lines. However, we must remember that this can occur is an undesirable property, as susceptibility to viral diseases. It is now known eight types of viruses that infect lily mosaic arabisa, cucumber mosaic, tobacco mosaic pogremkovosti tobacco ring spot of tobacco, lily latent virus, lily virus X-and pestrolepestnosti tulips. Aphids carry three type – the cucumber mosaic, latent and pestrolepestnosti tulips; nematodes – arabisa mosaic virus, and pogremkovosti Ringspot tobacco. Affected by one species of plant viruses are rarely killed, as the accumulation of several occurs when the collection includes a variety sent from different sources. As a result, tolerant to a single lily virus affected.