Volume 16, Issue 2 (Journal of Soil and Plant Interactions 2025)
2025, 16(2): 79-91 |
Back to browse issues page
1- Department of Soil Science and Engineering, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran
2- Department of Soil Science and Engineering, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran ,kiani.shahram@sku.ac.ir
2- Department of Soil Science and Engineering, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran ,
Abstract: (496 Views)
Background and Objective: The form of nitrogen in the nutrient solution affects the nutrients concentration and yield of the plant by influencing the uptake of cations and anions. This research was conducted to investigate the effect of different urea to nitrate ratios in the nutrient solution on the shoot and root nutrients concentration and yield of red French lettuce (Lactuca sativa L. cv. Lolla Rossa).
Methods: A soilless culture experiment using completely randomized design was carried out with seven urea to nitrate ratios in the nutrient solution and four replications in the research greenhouse of Shahrekord University. The urea to nitrate ratios in the nutrient solution were 0:100, 10:90, 20:80, 30:70, 40:60, 50:50, and 60:40. After harvest, dry weights of shoot and root and their nutrients concentration were measured.
Results: The results indicated that shoot nitrogen concentration (except for plants fed with a urea to nitrate ratio of 50:50) was not significantly affected by increasing the urea to nitrate ratio in the nutrient solution. Increasing urea to nitrate ratio in the nutrient solution led to a significant increase in the concentrations of Fe and Zn in the shoot and the concentrations of P and Ca in the roots of lettuce. But, the concentrations of P, K and Na in the lettuce shoot decreased. The results showed that the root and shoot dry weights were not affected by urea to nitrate ratio in the nutrient solution.
Conclusion: Considering the lower price of urea compared to nitrate-containing fertilizers and the useful effect of combined application of urea and nitrate in the nutrient solution for optimal lettuce growth without yield reduction, the application of a 50:50 ratio of urea to nitrate in the nutrient solution is recommended for red French lettuce production in soilless culture under the conditions of this research.
Methods: A soilless culture experiment using completely randomized design was carried out with seven urea to nitrate ratios in the nutrient solution and four replications in the research greenhouse of Shahrekord University. The urea to nitrate ratios in the nutrient solution were 0:100, 10:90, 20:80, 30:70, 40:60, 50:50, and 60:40. After harvest, dry weights of shoot and root and their nutrients concentration were measured.
Results: The results indicated that shoot nitrogen concentration (except for plants fed with a urea to nitrate ratio of 50:50) was not significantly affected by increasing the urea to nitrate ratio in the nutrient solution. Increasing urea to nitrate ratio in the nutrient solution led to a significant increase in the concentrations of Fe and Zn in the shoot and the concentrations of P and Ca in the roots of lettuce. But, the concentrations of P, K and Na in the lettuce shoot decreased. The results showed that the root and shoot dry weights were not affected by urea to nitrate ratio in the nutrient solution.
Conclusion: Considering the lower price of urea compared to nitrate-containing fertilizers and the useful effect of combined application of urea and nitrate in the nutrient solution for optimal lettuce growth without yield reduction, the application of a 50:50 ratio of urea to nitrate in the nutrient solution is recommended for red French lettuce production in soilless culture under the conditions of this research.
Type of Study: Research |
Subject:
Availability of soil water and nutrients for plant
Received: 2025/06/7 | Accepted: 2025/08/12 | Published: 2025/09/22
Received: 2025/06/7 | Accepted: 2025/08/12 | Published: 2025/09/22
Send email to the article author
| Rights and permissions | |
 |
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
Journal of Soil and Plant Interactions by http://jspi.iut.ac.ir is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly.
This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly.
