Comparison of winter wheat nitrogen additional fertilizer form within the integrated plant nutrient management | Ziemas kviešu slāpekļa papildmēslošanas veidu salīdzinājums integrētā audzēšanas sistēmā
2014
Skudra, I., Latvian Rural Advisory and Training Centre, Ozolnieki parish, Ozolnieki municipality (Latvia) | Ruza, A., Latvia Univ. of Agriculture, Jelgava (Latvia)
Starting from 2014 the farmers in Latvia will implement the Integrated Plant Nutrient Management the aims of which include the use of nutrients in a more rational way (yield-targeted, site and soil specific), the understanding of the interrelation of different nutrients, the use of the combinations of mineral and organic fertilizers, the provision of nutrients on a cropping system/ rotation basis. A field experiment of winter wheat (Triticum aestivum L.) variety ‘Kranich’ was designed to study the effect of different additional top dressing nitrogen fertiliser rates and forms on grain yield and quality within the integrated nutrient management system. The field experiment was carried out in cultivation loam soil of the Research and Training Farm “Vecauce” of the Latvia University of Agriculture. There were 6 variants with different nitrogen fertilizer rates: N0, N85, N153, N175 with sulphur 18 kg haE-1, N180 (rates determined by nitrogen tester) and N187 kg haE-1. The highest winter wheat yield (7.84 t haE-1) was obtained in the variant N175 with sulphur. The increase of yield was obtained by nitrogen fertilizer up to norm N152. Further increase of nitrogen fertilizer did not ensure a significant increase of yield. The obtaining of grain that would meet the requirements set for the food grain quality had been ensured by the nitrogen fertilizer norm starting from 175 kg haE-1.
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