Open Access
Open access
Yuzuncu Yil University Journal of Agricultural Sciences, pages 40-53

Effects of Vermicompost, Compost and Animal Manure on Vegetative Growth, Physiological and Antioxidant Activity Characteristics of Thymus vulgaris L. under Water Stress

Amir RAHİMİ 1
, 
Harun GİTARİ 2
, 
Graham Lyons 3
, 
Saeid Heydarzadeh 4
, 
Murat Tunçtürk 5
, 
Rüveyde TUNÇTÜRK 6
1
 
URMİYE ÜNİVERSİTESİ
2
 
KENYATTA ÜNİVERSİTESİ
3
 
4
 
5
 
100.YIL ÜNİVERSİTESİ, ZİRAAT FAKÜLTESİ
6
 
Publication type: Journal Article
Publication date: 2023-03-31
scimago Q3
SJR: 0.192
CiteScore: 1.1
Impact factor: —
ISSN: 13087576, 13087584
General Agricultural and Biological Sciences
Abstract
This study investigated the effect of organic fertilizers on vegetative growth and the physiological and antioxidant activity characteristics of thyme plants grown under stress. A factorial experiment was conducted according to randomized complete block design with 12 combinations and 3 replications in the 2018 growing season. The experiment factors were the implementation of organic fertilizers at 4 levels (vermicompost, manure compost, animal manure, and control) and irrigation regime at 3 levels (Irr1, Irr2, and Irr3, respectively, irrigation after 60, 90, and 120 mm evaporation from A pan). The results showed that With delayed irrigation, the chlorophyll a and b contents, total chlorophyll, and carotenoid decreased, while the application of low water stress enhanced the amount of oil and the oil yield with the respective highest values of 2.61% and 3.68 g/m under mild stress conditions. Nonetheless, higher values for the aforementioned properties were noted with the application of vermicompost. Water deficit decreased nutrient uptake (K, P, and N) and relative water content, biological yield, and seed yield of thyme, indicating that thyme was sensitive to drought, and organic fertilizers application improved nutrient uptake (K, P, and N) and relative water content, biological yield and seed yield of the plant within irrigation levels. The activities of catalase, superoxide dismutase and ascorbate peroxidase were reduced under organic fertilizers such as vermicompost and manure compost as compared with control under drought stress. The plants of thyme showed a good response to organic fertilizers under water deficit circumstances, with vermicompost being the most effective.
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