Osjetljivosti graška na simulirane rezidue mezotriona u tlima različitih fizikalno-kemijskih svojstava

master's thesis

• Title (english): Effect of soil pH solution on pea (Pisum sativum L.) sensitivity to simulated mesotrione residues
• Author: Filipa Burul
• Mentor: Klara Barić (mentor)
• Committee member: Klara Barić (predsjednik povjerenstva)
• Committee member: Maja Šćepanović (član povjerenstva)
• Committee member: Sanja Fabek Uher (član povjerenstva)
• Committee member: Ana Milanović-Litre (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Herbology); Zagreb
• Defense date and country: 2021-06-16, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Adsorpcija i degradacija mezotriona u tlu rezultat su interakcije više činitelja. Glavni cilj
istraživanja bio je utvrditi utjecaj pH otopine tla na osjetljivost graška na rezidue mezotriona.
Uzorci tla pH vrijednosti 5,5 i 7,5 tretirani su reduciranim dozama mezotriona: 1,1; 2,3; 4,5;
9; 18; 36 i 72 g a. t. ha-1
. Osjetljivost graška utvrđena je metodama vizualne ocjene
fitotoksičnog učinka 14, 21 i 28 dana nakon sjetve (DNS), redukcije sadržaja klorofila 28 DNS
te redukcije suhe... More nadzemne mase. Značajno veća fitotoksična oštećenja graška kod primjene
manjih količina simuliranih rezidua mezotriona utvrđena su na tlu pH 7,5. Redukcija sadržaja
klorofila na tlu pH 7,5 iznosila je 52,7 % kod primjene najmanje količine simuliranih rezidua
(1,1 g a. t. ha-1
) te 100 % kod primjene simuliranih rezidua u količini od 9 g a. t. ha-1
, dok se
na tlu pH 5,5 postotak redukcije kretao od 26,1 % (1,1 g a. t. ha-1
) do 100 % kod primjene 18
g a. t. ha-1
. Redukcija suhe nadzemne mase graška na tlu pH 7,5 kretala se od 82,2 % kod
primjene simuliranih rezidua u količini od 1,1 g a.t. ha-1 do 99,2 % kod primjene 72 g a. t. ha1
, dok se na tlu pH 5,5 kod iste količine simuliranih rezidua postotak redukcije kretao od
66,2 do 97,8 %. Istraživanjem je utvrđeno da vrijednost pH otopine tla značajno utječe na
osjetljivost graška na simulirane rezidue mezotriona te da se veća adsorpcija mezotriona na
čestice tla, a time i manja apsorpcija od strane biljke može očekivati u tlu kisele reakcije. Less

Abstract (english)

Adsorption and degradation of mesotrione in soil are the result of the interaction of several
factors. The main objective of the study was to determine the effect of soil pH on the
sensitivity of pea to mesotrione residues. Soil samples with pH of 5.5 and 7.5 were treated
with reduced doses of mesotrione: 1.1; 2.3; 4.5; 9; 18; 36 and 72 g a. i. ha-1
. The
susceptibility of pea was determined by visual assessment of phytotoxic effect 14, 21 and 28
days after sowing (DAS),... More reduction in chlorophyll content of 28 DAS and reduction in
aboveground dry biomass. Significantly higher phytotoxic injury to pea when smaller
amounts of simulated mesotrione residues were applied was found at a soil pH of 7.5. The
reduction in chlorophyll content in soil pH 7.5 was 52.7% when the lowest amount of
simulated residues (1.1 g a. i. ha
-1
) was applied and 100% when simulated residues were
applied at a rate of 9 g a. i. ha-1
. However, at soil pH 5.5, the percentage of reduction ranged
from 26.1% (1.1 g a. i. ha-1
) to 100% when 18 g a. i. ha-1 was applied. The reduction in
aboveground pea dry biomass at soil pH of 7.5 ranged from 82.2% when simulated residues
were applied at 1.1 g a. i. ha-1
to 99.2% when 72 g a. i. ha-1 was applied, while at soil pH of
5.5 with the same amount of simulated residues, the percentage of reduction ranged from
66.2 to 97.8%. The study revealed that the pH of the soil solution had a significant effect on
the sensitivity of pea to simulated mesotrione residues, and that greater adsorption and
lower uptake by plants were expected in acidic soils. Less

• Keywords: adsorpcija; razdradnja; pH otopine tla; reducirane doze; fitotoksičnost; biotest
• Keywords (english): adsorption; degradation; soil solution pH; reduced dosages; phytotoxicity; bioassay
• Language: croatian
• URN:NBN: urn:nbn:hr:204:834752
• Study programme: Title: Phytomedicine; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka fitomedicine (magistar/ magistra inženjer/inženjerka fitomedicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2022-01-26 09:47:37