Влияние минерального удобрения на условия азотного питания ярового ячменя в таежно-лесной зоне
| Jazyk: | ruština |
|---|---|
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Вестник Ульяновской государственной сельскохозяйственной академии. |
| ISSN: | 1816-4501 |
| Popis: | Установлено положительное влияние возрастающих доз азотного удобрения на условия питания растений ярового ячменя. При возделывании ячменя по озимой ржи количество минерализованного азота почвы составило 49,9 кг/га. Представлены зависимости запаса минерального азота от доз азотных удобрений. Nitrogen in sod-podzolic soil is considered to be the most important parameter and determines harvest of agricultural crops. Thus, the aim of our research was to study influence of nitrogen fertilizer on soil mineral nitrogen supplyin plow layer when cultivating spring barley To achieve the aim, it was necessary to solve the following tasks: determine dynamics of mineral nitrogen in plow layer; reveal dependence of soil mineral nitrogen supply on the dose of nitrogen fertilizer; determine ability of sod-podzolic soil to mineralize nitrogen. Research was carried out in Mari El Republic with the help of field trial method and laboratory analyses in accordance with standard and recommended procedures. Conditions of nitrogen nutrition were studied in connection with phosphate-potassium fertilizer and were determined by doses and times of nitrogen fertilizer application. Nitrogen fertilizer was used in the doses of 30-120 kg/ha, with the interval of 30 kg/ha of active material. Fertilizer was applied fully and in parts. As a result, it is stated that soil mineral nitrogen supply when cultivating spring barley in taiga forest zone depends on the dose of mineral nitrogen fertilizer and does not depend on time of application, it is redundant to use fertilizing of 30 kg/ha of active material at the tillering phase. Increasing doses of nitrogen fertilizer at the tillering phase increase supplies of nitrogen in plow layer from 7,5 to 73,7 kg/ha, by the end of vegetation these supplies decrease to 7,4... 30,0 kg/ha. The quantity of mineralized soil nitrogen is 49,9 kg/ha when cultivating barley after winter rye in sod-podzolic soil in the layer 0-40 cm. Stated dependence of soil mineral nitrogen on the dose of nitrogen fertilizer allows to forecast provision of spring barley with this nutrient during vegetation period. |
| Databáze: | OpenAIRE |
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