Irrigation Regimes and Nitrogen Rates as the Contributing Factors in Quinoa Yield to Increase Water and Nitrogen Efficiencies
Autor: | Maryam Bahrami, Rezvan Talebnejad, Ali Reza Sepaskhah, Didier Bazile |
---|---|
Rok vydání: | 2022 |
Předmět: |
Ecology
Engrais azoté Plant Science Efficience d'utilisation de l'eau F61 - Physiologie végétale - Nutrition Rendement des cultures Irrigation déficitaire F06 - Irrigation Chenopodium quinoa productivité agricole Ecology Evolution Behavior and Systematics F04 - Fertilisation Efficacité de l’utilisation des éléments nutritifs Chenopodium quinoa Willd deficit irrigation nitrogen fertilizer rate water use efficiency nitrogen uptake residual soil NO3-N |
Zdroj: | Plants; Volume 11; Issue 15; Pages: 2048 Plants |
ISSN: | 2223-7747 |
Popis: | Sustainable field crop management has been considered to reach the food security issue due to global warming and water scarcity. The effect of deficit irrigation and nitrogen rates on quinoa yield is a challenging issue in those areas. In this regard, the interaction effects of different N rates (0, 125, 250, and 375 kg N ha−1) and irrigation regimes [full irrigation (FI) and deficit irrigation at 0.75 FI and 0.5 FI] on quinoa yield and water and nitrogen efficiencies were evaluated with a two-year field experiment. Increasing nitrogen fertilizer application levels from 250 to 375 kg N ha−1 under FI and deficit irrigation did not cause a significant difference in seed yield and the total dry matter of quinoa. Furthermore, 20% and 34% reductions were observed for nitrogen use efficiency (NUE) and nitrogen yield efficiency with the application of 375 kg N ha−1 compared with that obtained in 250 kg N ha−1 nitrogen fertilizer, respectively. Therefore, a Nitrogen application rate of 250 kg ha−1 and applying 0.75 FI is suggested as the optimum rate to reach the highest seed water use efficiency (0.7 kg m−3) and NUE (0.28 kg m−3) to gain 4.12 Mg ha−1 quinoa seed yield. Under non–limited water resource conditions, an FI and N application rate of 375 kg ha−1 could be used for higher seed yield; however, under water-deficit regimes, an N application rate of 250 kg ha−1 could be adequate. However, questions about which environmental factors impressively restricted the quinoa growth for optimizing the potential yield need further investigation. |
Databáze: | OpenAIRE |
Externí odkaz: |