Beetaglükaani sisaldus suviodra terades sõltuvalt lämmastikuga väetamisest ja ilmastikust
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Kuupäev
2024
Kättesaadavus
03.09.2024
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Eesti põllumajanduse ja toidusektori eesmärgiks on tarneahelas loodava lisandväärtuse suurendamine aastaks 2030 50% võrra. Enamuse vilja ekspordib Eesti terana, kuid lisandväärtuse tõstmiseks on vaja leida lahendusi ja tehnoloogiaid, sestap ootabki see valdkond arengut. Käesoleva magistritöö eesmärgiks oli uurida Eesti Maaülikooli põldkatse andmete põhjal suvioder `Anni` seemnete β-glükaani sisaldust sõltuvalt väetusvariandist (0-120 kg ha-1) ja ilmastikust aastate 2020-2023 põhjal ning analüüsida seoseid odra β-glükaani, tuhande tera massi ja saagikuse vahel. Tulemused näitasid, et erinevad väetusvariandid ei mõjutanud β-glükaani kontsentratsiooni odra terades ning see oli sarnane nii väetamata kui erineva lämmastikväetise normiga väetatud odra terades, varieerudes vahemikus 4,65-4,91 g 100g-1. Aasta ehk ilmastik mõjutas β-glükaani sisaldust odras oluliselt. Kõrgemad õhutemperatuurid odra võrsumisel vähendasid β-glükaani sisaldust terades, kuid kõrsumisel, õitsemisel ning tera täitumisperioodil suurendasid β-glükaani sisaldust terades. Samas sademeterohkus mõjus β-glükaani sisaldusele pärssivalt odra kõrsumisel ning õitsemisel, kuid võrsumis- ja terade hilises täitumisfaasis oli sademete mõju positiivne. Beetaglükaani sisaldus odra terades oli seotud selle 1000 tera massiga ning β-glükaani sisaldus oli seda suurem, mida raskem oli tera.
Estonia`s agriculture and food sector aims to increase the added value of the supply chain 50% by 2030. Estonia exports most of its cerelas as grains, but solutions and technologies are needed for cereal grains valorization and this is why this sector is waiting for development. The aim of this thesis was to investigate the β-glucan content of spring barley `Anni`grains based on Estonian University of Life Sciences field experiment data depending on nitrogen fertilization (0-120 kg ha-1) and annual weather conditions for the years 2020-2023, and to analyse the relationships between barley β-glucan, thousand kernel weight and grain yield. The results showed that the β-glucan concentration in barley grains was unaffected by fertilization and was similar in barley grains fertilized with different nitrogen rates and without any fertilization and its content varied in barley grains between 4.65 and 4.91 g 100 g-1. The year (weather) had a significant effect on β-glucan level in barley grains. Higher air temperatures at tillering phase reduced β-glucan levels in the barley grains, but at stem elongation, flowering and grain filling phase β-glucan level in the grains increased. On the other hand, precipitation had negative effect on β-glucan content during stem elongation and flowering phase, while positive effect appeared during tillering and late grain filling phase. The β-glucan content was positively correlated with the kernel weight. The correlation between β-glucan content and barley yield was not statistically significant.
Estonia`s agriculture and food sector aims to increase the added value of the supply chain 50% by 2030. Estonia exports most of its cerelas as grains, but solutions and technologies are needed for cereal grains valorization and this is why this sector is waiting for development. The aim of this thesis was to investigate the β-glucan content of spring barley `Anni`grains based on Estonian University of Life Sciences field experiment data depending on nitrogen fertilization (0-120 kg ha-1) and annual weather conditions for the years 2020-2023, and to analyse the relationships between barley β-glucan, thousand kernel weight and grain yield. The results showed that the β-glucan concentration in barley grains was unaffected by fertilization and was similar in barley grains fertilized with different nitrogen rates and without any fertilization and its content varied in barley grains between 4.65 and 4.91 g 100 g-1. The year (weather) had a significant effect on β-glucan level in barley grains. Higher air temperatures at tillering phase reduced β-glucan levels in the barley grains, but at stem elongation, flowering and grain filling phase β-glucan level in the grains increased. On the other hand, precipitation had negative effect on β-glucan content during stem elongation and flowering phase, while positive effect appeared during tillering and late grain filling phase. The β-glucan content was positively correlated with the kernel weight. The correlation between β-glucan content and barley yield was not statistically significant.
Kirjeldus
Magistritöö
Põllumajandussaaduste tootmise ja turustamise õppekaval
Märksõnad
magistritööd, beetaglükaan, suvioder, lämmastik, ilmastik