AGRO 73 |
| Mulching the soil greatly increases the temperature of the soil that in turn intensifying microbiological processes strongly influences on the formation of rolling nutrients in soil. Our experiments carried out on irrigated typical serozems of foothill zones of the Zarafshan valley has shown that under mulching the soil by polyethylene film, particularly springtime, the content of ammonium and nitrate nitrogen, rolling phosphate, fraudulent potassium is increased in soil. Such increase of assimilating forms of the nutrients are observed in arable, and sub-arable layers of the soil. Mulching most of all has increased the content of ammonium and nitrate nitrogen in soil, but the amount of assimilating phosphate and potassium increased in less degree. It is connected that the formation of ammonium and nitrate nitrogen more depends on the temperature of soil and atmosphere and subjected to quick change. The experiments have been carried out under tobacco growing. Tobacco influences on the content of the rolling nutrients in soil too. During the escalated growing and development of the plants the content of the nutrients in soil decreases. This is particularly noticeable on the absolute control, where the fertilizer was not used. The change of the chemical composition of the soil with standpoint of the rolling nutrients, under mulching has influenced on the plants feeding that resulted in the change of the chemical composition of the plants and harvests. Under mulching the content of the gross nitrogen, phosphorus and potassium in plants in contrast with the control increases. Thereby, mulching the soil in tobacco growing in condition of foothill zones of Zarafshan valleys in Uzbekistan greatly enlarges the content of the main rolling nutrients of soil and improves the chemical composition of the tobacco plants. |
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New Developments and Issues in Agrochemical Sciences
8:00 AM-11:00 AM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Agrochemicals |