mohsen karimimovahedi; Gholam Akbari; Gholam Ali Akbari; Fatemeh Benakashani; Mohammad Reza Ardakani
Abstract
Objective: Environmental stress, especially drought stress, is one of the most important factors that reduce the growth and development of oil plants such as rapeseed in arid and semi-arid regions. The purpose of this research is to investigate the effect of biochar and biosulfur on seed yield and some ...
Read More
Objective: Environmental stress, especially drought stress, is one of the most important factors that reduce the growth and development of oil plants such as rapeseed in arid and semi-arid regions. The purpose of this research is to investigate the effect of biochar and biosulfur on seed yield and some ecophysiological traits of rapeseed under drought stress conditions in winter cultivation.Methods: This research was carried out in form of a factorial split-plot with randomized complete block design having three replications in 2019 in Karaj. In this experiment, irrigation treatment witnessed three levels of 30%, 60%, and 100% of crop capacity as main plots, while biochar treatment saw three levels of no application and application of three and six tons per hectare and biosulfur treatment, two levels of application and non-application as plots. Subsidiaries were considered.Results: It was found that drought stress had a significant effect on the seed and oil yield of rapeseed. Thus, the amount of these traits in drought stress showed a decrease of 50% and 52%, respectively, compared to the control. Also, the use of six tons per hectare of biochar had increased by 49% and 36% in terms of its number of pods per plant and the number of seeds per pod. Also, the interaction effect of biosulfur application and the use of six tons of biochar had the greatest effect on the traits of the number of pods per plant and harvest index.Conclusion: The results showed that the use of biofertilizers can be used as a suitable method to increase the yield of rapeseed. Increasing oil percentage and grain yield will ultimately increase the field and economic yield (oil) of the rapeseed plant.
Peyman Mohammadzadeh Toutounchi; Alireza Pirzad; Jalal Jalilian
Abstract
In order to investigate the effect of biological and organic fertilizers on the yield (quality and quantity) of chicory forage under rainfed condition, a factorial experiment was conducted at Urmia University based on randomized complete block design with three replications in 2016. Treatments included ...
Read More
In order to investigate the effect of biological and organic fertilizers on the yield (quality and quantity) of chicory forage under rainfed condition, a factorial experiment was conducted at Urmia University based on randomized complete block design with three replications in 2016. Treatments included control, Mycorrhiza (AMF), Thiobacillus bacteria (Thio), AMF+Thio, Vermicompost (V), AMF+V, Thio+V and AMF+Thio+V that their effects were evaluated in two growth stages (before stem elongation and full flowering). In comparison with control, the AMF+Thio+V increased dry forage yield, dry matter digestibility, crude protein yield and water soluble carbohydrates yield 99.72%, 143.21%, 68.54% and 76% in full flowering stage, respectively, and this treatment had lowest acid detergent fiber content at both growth stages among all treatments. In general, the use of Mycorrhiza and Thiobacillus together with vermicompost, improved the quantitative and qualitative performance of chicory forage in rainfed condition.