Effect of different soil moisture regimes on plant growth and water use efficiency of Sunflower: experimental study and modeling
| Autor: | Arifur Rahaman, Azhar-u-ddin Chachar, Shakeel Ahmed Soomro, Ashutus Singha, Rajesh Kumar Soothar, Faiza Kalhoro |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Irrigation
Crop yield Soil moisture depletion Science 0208 environmental biotechnology 02 engineering and technology 010501 environmental sciences 01 natural sciences Sunflower AquaCrop 020801 environmental engineering Water resources Crop Gypsum block Agronomy Yield (wine) Validation General Earth and Planetary Sciences Environmental science Water-use efficiency Water content 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Bulletin of the National Research Centre, Vol 45, Iss 1, Pp 1-8 (2021) |
| ISSN: | 2522-8307 |
| Popis: | Background Climate change and increasing demand in non-agricultural sectors profoundly affect the availability and quality of water resources for irrigated agriculture. The FAO AquaCrop simulation model provides a sound theoretical framework to investigate crop yield response to environmental stress. This model has successfully simulated crop growth and yield as influenced by varying soil moisture environments for crops. Integrating crop models that simulate the effects of water on crop yield with targeted experimentation can facilitate the development of irrigation strategies for high yield procurement and improving farm level water management and water use efficiency (WUE) under climatic condition of District Hyderabad, Sindh, Pakistan. Results This study was based on completely randomized block design with three treatments including T1 (30% soil moisture depletion), T2 (50% soil moisture depletion) and T3 (70% soil moisture depletion) with three replicates. In order to determine the crop water requirements under desired treatments, the gypsum blocks were used for computing the daily soil moisture depletion. The result shows that total volume of water applied to crop under T1, T2 and T3 was 9689, 5200 and 2045 m3 ha−1, respectively. As a result, the grain yield under T1, T2 and T3 was 13.2, 12.1 and 14.3 t ha−1, respectively. These results advocate that total yield of crop under T1 and T2 was less as compared to T3. The T3 gave higher yield and WUE compared than other treatments. On the other hand, results revealed that the simulated sunflower yields showed a good agreement with their measured under T3. The simulated grain yield was 15.5 t ha−1, while the measured yield varied from 12.1 to 14.3 t ha−1. This study suggested that WUE under T3 was more as compared to T1 and T2. The results showed that the T3 gave the highest crop yield in relation to WUE and optimize yield of sunflower crop under water scarcity. Conclusion The Aquacrop model could very well predict crop yield and WUE at T3 under experiential region for sunflower production. |
| Databáze: | OpenAIRE |
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