2 research outputs found
Sadržaj polifenola i antioksidativni kapacitet ekstrakata listova paradajza zaraženih plamenjačom
Late bligth is one of the main causes of the tomato yeild losses. In this paper, the biochemical response of tomato variety Plovdivski kasni in leaves infected with Phytopththora infestans was analyzed. It was found that there is a correlation between the degree of disease severity and the content of total polyphenols and flavonoids in the leaves. The different content of phenolic compounds also affected the antioxidant capacity of leaf extracts. By increasing the degree of infection, the content of the soluble polyphenolic compounds and the antioxidant capacity of the leaves decreased.Plamenjača je jedan od glavnih uzroka smanjenja prinosa paradajza što može dovesti do velikih ekonomskih gubitaka. U ovom radu je ispitan biohemijski odgovor listova paradajza sorte ‘Plovdivski kasni’ na infekciju prouzrokovačem plamenjače Phytopththora infestans. Utvrđeno je da postoji korelacija između stepena zaraženosti biljke i sadržaja ukupnih polifenola i flavonoida u listovima. Različit sadržaj fenolnih jedinjenja je uticao i na antioksidativni kapacitet ekstrakata listova. Povećanjem stepena infekcije sadržaj rastvorljivih polifenolnih jedinjenja i antioksidativni kapacitet listova se smanjivao
Smanjenje bolesti ozimog stočnog graška u združenoj setvi u polju
A field experiment was conducted at the experimental field of the Institute of Field and
Vegetable Crops in Novi Sad to investigate the effect of forage winter pea and winter oat
intercropping on ascochyta blight and powdery mildew infections. Seeding rations of pea
and oat in Treatment 1 (50:50%) and Treatment 2 (75:25%, respectively) reduced ascochyta
leaf infection by 32.5% and 12.8%, and powdery mildew infection by 12.3% and 17.5%,
respectively, compared to pea monoculture used as a control (Treatment 3). The same
seeding rations in Treatment 1 and 2 reduced ascochyta blight on pea plants by 37.2% and
18.3%, respectively. However, there were no significant differences between the treatments
in reducing powdery mildew on plants.
The effects of different treatments on the average number of pods per plant, seed per
pod, shriveled pods and seed weight were analyzed using Spearman’s correlation coefficient.
Negative but not statistically significant effects on those measured parameters were registered
in Treatments 2 and 3, while Treatment 1 showed positive effects on all parameters except
shriveled pods.
According to all data obtained in this research, the intercropping mixture of pea and
oat at 50:50% seeding ratio had the best effect on the measured parameters while the
intercropping mixture of pea and oat at 75:25% seeding ratio had low to moderate effect in
comparison with pea monocrop.Poljski ogled je postavljen na oglednom polju Instituta za ratarstvo i povrtarstvo u
Novom Sadu kako bi se istražio uticaj smeše ozimog stočnog graška i ozimog ovsa na pojavu
antraknoze i pepelnice. Smeše graška i ovsa u Tretmanu 1 (50:50%) i Tretmanu 2 (75:25%)
smanjile su antraknozu lista za 32.5% i 12.8%, a pepelnicu za 12.3% i 17.5% u odnosu na
monokulturu graška, koja je uzeta za kontrolu (Tretman 3). Navedene smeše u Tretmanima
1 i 2 su smanjile pojavu antraknoze celih biljaka za 37.2% i 18.3%. Međutim, između tretmana
nije uočena značajnija razlika u pojavi pepelnice na celoj biljci graška.
Uticaj tretmana na prosečan broj mahuna po biljci, šturih mahuna po biljci, zrna po
mahuni i mase semena analizirani su Spearman-ovim koeficijentom korelacije. Negativne ali
ne statistički značajne korelacije sa merenim parametrima su registrovane u Tretmanima 2 i
3, dok je Tretman 1 imao pozitivan efekat na merene parametre sa izuzetkom šturih mahuna.
Prema dobijenim rezultatima u sprovedenom istraživanju, združena setva ozimog stočnog
graška i ozimog ovsa u smeši 50:50% je imala najbolji efekat na istraživane parametre dok
je združeni usev graška i ovsa u smeši 75:25% imao slab do srednji uticaj u poređenju sa
kontrolom, odnosno monokulturom graška