Topicality and demand of the subject of dissertation. The task of any independent sovereign state is to ensure food security, understand as the ability of the state to guarantee the need satisfaction in essential products regardless of external and internal threats provides normal activity of the population. Sustainable increasing of competitive goods production is the distinctive feature of the present stage of vegetable production development in the republic in the conditions of market-oriented economy.
The President of the Republic of Uzbekistan Islam Karimov at the opening ceremony of the International conference «On Vital Reserves in the Realization of Food Program in Uzbekistan» held on June 5-6 2014, has mentioned: «Our forecasts: the production of fruits and vegetables, grapes and melons is envisaged to increase at least 2.3 times in 2020 compared to the year 2014».
Taking into account, that vegetables arc essential food for improving health, working capacity and increasing of life expectancy, the great attention is paid to vegetable production development in our country. The main vegetable crop of Uzbekistan is tomato. Its fruits arc valued for high taste and dietary qualities that is one of the most essential sources of bioactive substances and antioxidants, protecting the human body from oxidative stress and retaining the aging process. In connection with increasing needs of the domestic market and wide possibilities of export of fresh fruits and tomato products there is a necessity to increase tomato production mainly due to yield increase. In conditions of groumd and water resources deficiency the major way of increasing the manufacture of agricultural production is increase of productivity by introduction of new varieties, application of progressive cultivation technology, the use of high-quality seeds. Research developments on the varieties selection, improving cultivation technology of tomato fruits and seeds cultivation is an actual scientific problem having an important meaning for scientific and practical vegetable production of the country.
An important criterion of the research theme relevance and effective tomato crop cultivation is an implementation of decrees of the President of the Republic of Uzbekistan dated January 9, 2006, №UP-3709 «About measures of deepening of an economic reforms in horticulture and winegrowing», dated October 20, 2008 №UP^IO41 «About measures for optimization of field areas and increasing of the production of food crops», as well as the decrees of the Cabinet of Ministers of the Republic of Uzbekistan dated November 20, 2013, №KM-311 «About long-range plan of the production and the use of fruits and vegetables, potatoes, melons and grapes in 2014».
The aim of research. The main purpose of disscrtational research was: selection of highly productive grades, improvement of basic elements of cultivation technology of marketable products and high-quality tomato seeds.
Scientific novelty of disscrtational research consists of the following:
a complex estimation of released tomato varieties and hybrids in the republic and the USA is conducted for the first time in Uzbekistan. Released as an initial material for breeding: by productivity (28-35% higher) Doni, UzMASH-1, Progressivniy, Vostok 36, H-9314, AP-721 Mountain fresh and Celebrity F!; by early maturity (5-7 days) - La Rossa, TSH-3, Glamour, Shafak, Dubok, AP-711, AP-721, Sun 6347, Tyomnokrasniy 2077, Doni, OX-150; Florida 47 F!, PS771297 F! by the bush density - TSH-3, Sun 6347, H-9314, H-9322, Florida 47 F!; by resistance to the complex of virus diseases (65-90%) - Toshkcnt tongi, Surhan 142, H-9314, Glamour, Celebrity F!; by high taste qualities (4.9 points) - Bahodir, Maikopskiy urojayniy 2090, Vostok 36, Atomic, Affirm, Glamour, high content of common solid matters (5,9-6,9%) - UzMASH-1, Namuna 70, Novinka Pridnestrovya, Dony and Progressivniy; H-9314, H-9422, AP-711, TSH-2, TSH-3, Pcto 76, hybrids F! Celebrity, Puebla, BHN 411; by low level of nitrates accumulation (13-20 mg/kg) - Novinka Prcdnestrovia, Progressivniy, Aspirant, Dubok, UzMASH-1, La Rossa, AP-721, Celebrity F!;
a comparative estimation is given by seedling and directly seed sowing methods (April 5-10), terms of seedling planting (April 20-25, May 5-10, May,
20-25, June 10) to grow fruits for grocery purposes, justified an advantage of planting methods of seedling and directly seed sowing methods;
determined optimal growing schemes of planting for varieties and with dense bush Shark yulduzi (90><23 cm) and middle height bush Uzbekistan (70x35 cm and 90x28 cm) at commodity goods production;
efficiency of seed and plants treatment with different electro treatments, compared to growth-promoting factor for the first time;
researches on maternal and ecological heterogeneity of tomato seeds were conducted for the first time in Uzbekistan. It is conducted in aftcraction showed that the most fruitful posterity is given by seeds from the varieties formed at the variety Bahodir on 2 clusters, and the other varieties - on 2-3 main stem clusters.
justified an advantage of the use for local reproduction seeds sowing under conditions of saline soils;
an influence of planting and directly seed sowing methods and terms of seedling planting on the growth and development, seed production and yield of posterity was determined for the first time;
efficiency of early tomato planting on seed purposes arc proven in the central climatic zone (the end of April - the beginning of May);
a negative effect of directly seed sowing method on early maturity feature of the variety was established.
1. On the basis of complex estimation 56 domestic and foreign tomato variety samples confirmed the existence in Uzbekistan and following correlations: the earlier maturation comes, the higher early harvest; the longer the main stem, the more branch crowns on it and the less early harvest; the larger and multilocular fruits, the more delicious they arc and the the more nitrates accumulates; the higher harvest, the less nitrates accumulates;
varieties arc revealed by: early maturation - La Rossa, TSH - 3, Glamour, Shafak, Dubok, AP- 711, AP- 721, Sun 6347, Tyemnokrasniy 2077, Dony, OX-150, Florida 47 Fl, PS 771297 F!, Ultra girl F!; bush density- TSH - 3, Sun 6347, H-9314, H-9322; resistance to the complex of diseases - Toshkcnt tongi, Surhan 142, H- 9314, Glamour, Celebrity F!; high taste qualities - Bahodir, Vostok 36, Maikopskiy urojayniy 2090, Aspirant, Mountain fresh Fb Sun leapcr F!, Celebrity Fi, Atomic, Affirm, Glamour;
the higher content was differ in fruit with: total dry substances -UzMASH-1, Namuna 70, Novinka Pridnestrovya, Dony and Progressivniy; H- 9422, AP-711, TSH - 2, hybrids of F! Celebrity, Puebla; soluble dry substances - Novinka Pridnestrovya, Surhan 142, Progressivniy, Novichok, H-9314, H-9422, hybrids F!
Sun Icapcr, Celebrity, BHN 411; amount of sugar - UzMASH-1, Novichok, MJ-261, Aspirant, Dony, TSH-2, TSH-3, Affirm, Glamour, hybrids F! Mountain fresh, Sun beam; vitamin C - Novichok, Dubok, TMK-22, H-9422, H-9314 and hybrids BHN-411, PS 771297; relatively less acidity and rather high sugar-acid index -UzMASH-1, Dony, TMK-22, October, Aspirant, La Rossa, AP-711, Atomic, Glamour, hybrids of F! Sun Icapcr, Mountain spring;
varieties with low content of nitrates are: Novinka Pridnestrovya, Progressivniy, Aspirant, Dubok, UzMASH-1, La Rossa, AP-721, Celebrity F!, Big beef Fi, and with high content are: Avicenna, Bahodir, Namuna 70, Novichok, Atomic, H-9422, Acclaim, Peto 76, Glamour.
2. The most efficient, resistant to diseases, with high quality of fruits: local varieties - small-fruited UzMASH-1 and Dony, large-fruited - Progressivniy, Vostok 36 and American small-fruited varieties H- 9314, AP- 721, large-fruited hybrids F! Mounting fresh and Celebrity. These varieties increase the yield on 8-15 t/ha or 19-32%, and hybrids - on 10-15 t/ha or on 24-33 %;
In 2007, the hybrid Mountain fresh F!was included in the State Register of Uzbekistan;
use of varieties with the raised content of general dry substances provides increase in an output of paste at 10-30 kg from 1 ton of fruits.
3. For the first time, based on the study of the effectiveness of agroclcctro technologies found that:
efficiency of seed and plants treatment with different electro treatments, compared to growth-promoting factor;
seed-soaking treatment in the water with activated exposure renders unsteady influence on the yield increasing. The seeds ray treatment with UVL+LFEMR with the following seedling ray treatment with UVL - arc not efficient.
Sustainable and effective action is rendered:
a complex influence of seed ray treatment with UVL+LFEMR, seed-soaking treatment in the water with activated exposure with the triple ray treatment of growing plants with UVL;
joint application of seed ray treatment with UVL+LFEMR, triple ray treatment of the plants with UVL;
seed-soaking treatment in the solution of a sodium humate and triple plants spraying with this solution;
application of single plants spraying during blossoming with the Roslyn.
4. Comparison of nonsccdlings and seedling cultivation of commodity fruits at various planting dates shown that:
direct-seeded plants by the main stem height, amount of branch crowns, leaves, fruits and yield concede to seedling, planted on April, 20-25 and May, 5-10, identical with the plants, planted on May, 20-25 and exceeded the plants, planted on June, 10;
most general and marketable yield of Avicenna, Surhan 142 and TMK-22 varieties form with the seedling method at seeds planting on April, 20-25, comparatively high - on May, 5-10;
the largest profit and profitability is achieved with seed planting on April, 20-25;
when reschedule these terms all these characteristics arc reduced, directly seed sowing method on economic efficiency concede to seedling sowing term on April, 20-25, equivalent to planting on May, 5-10 and exceed the later planting.
5. In determining optimum plant density and layout of plants found that:
the larger feeding area provision strengthens the height of above-ground part, especially due to the increase of amount of branch crowns;
most general and marketable yield and the largest varieties of the average tall variety Uzbekistan forms at plant stand 40816 plants/hectarcs with sowing schemes 90x28 cm and 70x35 cm, and compact variety Shark yulduzi - at plant stand 47619 plants/hectarcs and with sowing scheme 90x23 cm. Application of these with sowing schemes provides the most economic effect.
6. In the study of heterogeneity matrikalnoy seeds set following pattern:
The larger and multilocular fruits, the larger seeds they form. The highest yield and seed size arc differed fruits collected from the following brushes of the main stem: biloculate variety Doni - 2, 3, 4; thrcc-fourlocular TMK- 22 - from 1,2, 3; four-fivelocular variety Surhan 142 - from 2-3, multilocular variety Bahodir -from 1-3 cluster of the main stem lateral shoot cluster;
the best sowing qualities, the rapid rates of development and growth of the posterity plants have the seeds received from varieties Dony and Surhan 142 - from 1, 2 and 3 main stem cluster, TMK- 22 - from 1 and 2, Bahodir - from 2 and 3;
the most yield posterity is given by seeds from the fruits collected from variety Bahodir - 2n<r cluster (9.4 %), and other varieties - from 2-3rd main stem cluster (13.5 - 25.1 %);
The use of these seeds, compared to the seeds received from a lateral shoot cluster provides receiving of profit from the varieties Doni - 577.0 thousand sum, TMK- 22 - 389.7 thousand sum, Surhan 142 - 666.9 thousand sum and Bahodir -193.2 thousand sums from 1 ha.
7. Based on the study of environmental heterogeneity tomato seeds revealed that:
seed grown in different climatic zones, under sowing in the central and south zones in nonsaline soils, by germination capacity, rate of growth, power growth and posterity plants yield aren’t distinguished;
in the north zone under the conditions of soil saline, the best field germination had the seeds of local reproduction. They give more tall plants, forming large fruits, higher general and marketable yield (15.2-18.8 % higher);
their use compared to grown in the south zone plants, provides receiving of profit - 224.8 - 299.8 thousand sums/ha, and plants grown in the central zone -517.0 - 674.4 thousand sums from a hectare according to the costs of 2005.
8. When comparing nonseedlings and seedling cultivation of tomato seeds at different stages of transplanting established that:
the largest seeds yield from fruits, the biggest harvest of larger seeds of the tested varieties is formed plants from seedling planting on April, 20-25, rescheduled the terms of planting these indexes arc decreased;
direct seeded crop provides an obtainment of seed largeness and yield, close to seedling planting of the varieties Avicenna and Surhan 142 on May, 20-25, and variety TMK-22 on May, 5-10;
a seed production of all varieties with both methods of growing and all tested terms of seedling planting is cost-effective. The highest profit is achieved with seedling planting on April, 20-25;
directly seed sowing method of all three varieties is cost-effective compared to the planting terms on May, 20-25 and June, 10;
the best laboratory and field seed germination was with growing on the term of seedling planting on May, 5-10, and also grown: variety TMK-22 on April, 20-25, varieties Avicenna and Surhan 142 on May, 20-25, and the least had all varieties - on June, 10;
seed, grown directly seed sowing method and with seedling planting on April, 20-25 and May, 5-10, give plants, not differ among themselves, by rate of growth, growth power, and the size of early harvest;
the seeds, grown with seedling planting on May, 20-25 and June, 10, give plants, conceded in the development on 3 days, having less tall bushes and less early harvest, i.e. growing of seeds at the late planting terms entails the loss of early maturity;
seeds grown by directly seed sowing method, compared to grown through seedling of the varieties Avicenna and TMK- 22 give less early-maturing plants, and variety Surhan 142 - docs not influence on this feature.
The best yield qualities have seeds grown: variety Surhan 142 - with directly seed sowing method, variety Avicenna - with planting on April, 20-25, variety TMK- 22 - with planting on May, 5-10. The seeds, grown with seedling planting on June, 10, give the poorly developed and low harvest plants of posterity.