Effect of Nitrogen Sources on Quantitative and Qualitative Yield of Coriander (Coriandrum sativum L.) in Competition with Weeds
Journal Title: Iranian Journal of Field Crops Research - Year 2024, Vol 22, Issue 2
Abstract
IntroductionOne of the important challenges in the agricultural sector is the low use efficiency of chemical fertilizers, especially nitrogen fertilizers, as well as the competition of weeds with crops. In this regard, it is important to use management solutions to reduce the use of chemical inputs. To increase the quality level of food used by humans while reducing environmental pollution. One of the management solutions is the use of controlled-release fertilizers. Considering the desire to increase the quantity and quality of the coriander plant and also to identify the best-studied genotype, research was conducted in this field to investigate the effect of different sources of nitrogen fertilizer and the competition of weeds in the region on the agricultural and medicinal properties of different genotypes of coriander. Materials and MethodsThe experiment was carried out in factorial form based on a randomized complete block design with three replications in the teaching and research farm of the Faculty of Agriculture Shahed University of Tehran in the 2019 season. An experimental treatment consisted of three factors including: 1) nitrogen fertilizer sources (Control treatment: without nitrogen fertilizer; SCU: with rate of N, 70 kg ha-1, and urea: with rate of N, 70 kg ha-1), 2) genotypes (Nahavandi, Pishgam and, Ethiopia), and 3) weeding (weedy and weeding by hand). The experimental plot size was 2Ã2 m2 dimensions with a plant spacing of 25 cm Ã10 cm. A space of 1.5 m between plots and 2 m between blocks were maintained. At the end of the growth period, coriander plants of 1 m2 per plot were harvested, and fruit yield per plot was measured. Also, in the plots under weed competition, the competition index was evaluated. Sampling of weeds was done in two stages (in the growing stage of the main plant and another in the ripening stage of the seeds) using quadrats of 30 x 30 cm and the abundance and biomass of each plot was calculated. To evaluate the percentage of the essential oil of coriander seeds, the Clevenger device was used with the steam distillation method to identify and determine the essential oil compounds extracted from the gas chromatography device.Results and DiscussionRelated to the competitive indices, results showed that, the Pishgam genotype had the highest ability to withstand competition (%), and the lowest yield loss (%), and, the Nahandi genotype had the lowest ability to withstand competition (%) and the highest yield loss (%). It seems that the Pishgam genotype was more successful in competing with weeds due to its early maturity and higher germination rate. So, it has a higher ability to tolerate weed competition than other genotypes. Regarding fruit yield, the findings of this experiment revealed a significant increase in yield with the application of nitrogen fertilizer in the weeded plots. Additionally, the Ethiopian genotype exhibited the highest fruit yield among the weeded plots. However, the fruit yield of genotypes did not show significant differences in the un-weeded plots. This suggests that weed competition significantly limited fruit yield compared to the inherent characteristics of the genotypes assessed in this trial. Ethiopian genotype showed the highest percentage of essential oil in all nitrogen fertilizer sources. In the Pishgam genotype, the most essential oil was obtained in the sulfur-coated urea treatment but, in the Nahavandi genotype, the most essential oil belonged to the control fertilizer treatment. Due to the difference in the genetic structure of genotypes, various results have been observed, which can be due to the difference in the fertility of different genotypes. Also, the results of this experiment showed that the main composition of coriander essential oil is linalool.ConclusionThe results showed that N fertilizer and weeding significantly increased seed yield. And the Ethiopian genotype had the highest seed yield and essential oil in weeded plots. Also, the Pishgam genotype had the highest Ability to withstand competition (%) and the lowest Yield loss (%).
Authors and Affiliations
F Alaei,S Maleki Farahani,H Habibi,M. H Fotokian,M Khodadadi,
Keywords
Related Articles
- EP ID EP736549
- DOI https://doi.org/10.22067/jcesc.2024.84994.1276
- Views 55
- Downloads 1
Evaluation of The Water Stress and Irrigation Management Effects on Soil CO2 Emission, Water Productivity and Soybean Yield (Glycine max L.)
IntroductionThe challenges of climate change and increasing greenhouse gas emissions have led to consequences such as global warming and successive droughts. Additionally, the rise in agricultural activities has signific...
Optimization of Irrigation and Nitrogen Levels on Yield, Water Use Efficiency, and Nitrogen Use Efficiency of Quinoa (Chenopodium quinoa Willd.) by Using the Surface-Response Methodology
Introduction  The optimum resource level in agro-ecosystems should be determined to decrease production costs, conserve resources, and mitigate environmental pollutions. Optimization is an effective and sustainable mana...
Effect of Irrigation Interval and Nitrogen and Potassium Fertilizers on Yield, Yield Components and Some Traits of Gilaneh Rice
IntroductionConsidering the conditions of Iran in terms of water resources, high consumption of nitrogen fertilizer and low consumption of potassium fertilizer, less water use in rice cultivation and balance in chemical...
Evaluation of Growth Characteristics of Four Clover Species (Trifoliums pp.) Affected by Freezing Stress under Controlled Conditions
Introduction: In Iran, clover is the second most important forage crop after alfalfa (Medicago sativa) and is cultivated on a surface of about 70,000 hectares. Yield improvement of this plant could be achieved through au...
Assessment of Photosynthetic Traits of Kabuli-type Chickpea Genotypes under Salinity Stress
IntroductionThe effect of salinity stress on the quantity and quality of crop production highlights the importance of managing and reducing the damage caused by this stress factor in agriculture. Increasing soil salinity...