Agronomska i gospodarska svojstva pivarskog ječma u ozimom i jarom roku sjetve

master's thesis

• Title (english): Agronomic and economic traits of malting barley planted in autumn and spring
• Author: Borna Kadoić
• Mentor: Zlatko Svečnjak (mentor)
• Committee member: Zlatko Svečnjak (predsjednik povjerenstva)
• Committee member: Željko Jukić (član povjerenstva)
• Committee member: Darko Uher (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Field Crops, Forage and Grassland); Zagreb
• Defense date and country: 2022-09-29, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

U proizvodnji pivarskog ječma preporuča se kasna sjetva u jesen za ozime sorte i što ranija sjetva u proljeće za jare sorte kako bi se ostvarila optimalna kvaliteta zrna. Stoga je glavni cilj ovog istraživanja bio utvrditi utjecaj rokova sjetve u jesen i proljeće na najvažnija agronomska i gospodarska svojstva pivarskog ječma. Tretmani istraživanja bili su rokovi sjetve i to rani ozimi, kasni ozimi i jari rok. Poljska istraživanja provedena su tijekom jedne vegetacijske sezone uzgajajući sortu Planet u preporučenoj gustoći sjetve. Usjevi posijani u kasnom ozimom i jarom roku sjetve imali su značajno manji broj klasova u žetvi u usporedbi s usjevom iz ranog ozimog roka sjetve. Najviši biološki prirod i prinos zrna utvrđen za usjev iz ranog ozimog roka sjetve, ali nije udovoljio kriterijima kvalitete zbog preniskog udjela zrna veličine preko 2,5 mm. Pivarski ječam proizveden u kasnom ozimom roku sjetve imao je neznatno viši sadržaj proteina (11,6 %) i manji udio zrna prve klase (83,9 %) od zahtjeva otkupljivača. Kriterije kvalitete pivarskog ječma obzirom na sadržaj proteina i veličinu zrna preko 2,5 mm ostvario je samo usjev ječma uzgojen u jarom roku sjetve, ali sa 22 % nižim prinosom zrna u usporedbi s usjevom iz ranog ozimog roka sjetve. Za razliku od biološkog priroda, prinosa i kvalitete zrna, nije utvrđen značajan utjecaj roka sjetve na žetveni indeks.

Abstract (english)

The late autumn planting for winter varieties and early spring planting for spring varieties is a recommended agronomic practice in the production of malting barley to achieve optimal grain quality. Therefore, the main aim of this research was to determine the influence of planting dates in autumn and spring on the most important agronomic and economic traits of malting barley. The early autumn, late autumn and spring planting dates were investigated. Field experiments were conducted during one growing season with malting variety Planet planted at the recommended seeding rate. Crops planted in the late autumn and spring produced a significantly lower number of ears at harvest compared to the crop from the early autumn planting date. As a result, the crop planted in early autumn had the highest biological and grain yield, but failed to meet the malting quality due to the small proportion of grains larger than 2.5 mm. The crop produced in late autumn had a slightly higher protein content (11.6%) and a lower proportion of grains larger than 2.5 mm (83.9%) than the buyer’s grain quality requirements. Malting barley quality with regard to protein content and grain size was obtained only by the crop planted in spring, but with a 22% smaller grain yield compared to the crop from the early autumn planting date. In contrast to the findings for the biological yield, grain yield and grain quality, planting date showed no effect on the harvest index.

• Keywords: biološki prirod; kvaliteta zrna; pivarski ječam; prinos zrna; rok sjetve
• Keywords (english): biological yield; grain quality; malting barley; grain yield; planting date
• Language: croatian
• URN:NBN: urn:nbn:hr:204:016320
• Study programme: Title: Plant Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar / magistra inženjer/inženjerka biljnih znanosti (magistar / magistra inženjer/inženjerka biljnih znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-10-25 11:12:49