Influence of deficit irrigation and biochar amendment on growth, physiology, and yield of cucumber in West Texas
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View abstract on PubMed
Summary
This summary is machine-generated.Deficit irrigation (DI) significantly reduced cucumber yield and growth, but a moderate 80% ETc-60% ETc strategy offers a 14% yield reduction with 25% water savings. Biochar showed minimal impact on cucumber yield.
Area Of Science
- Agricultural Science
- Soil Science
- Agronomy
Background
- Water scarcity in arid regions necessitates water-conserving strategies like deficit irrigation (DI) and biochar amendment.
- Limited research exists on the combined effects of DI and biochar in West Texas, a water-limited environment.
Purpose Of The Study
- To evaluate the interactive effects of deficit irrigation (DI) and biochar amendment on soil hydraulic conductivity, cucumber growth, physiology, and yield in West Texas.
- To identify optimal water management and soil amendment strategies for cucumber cultivation under water-limited conditions.
Main Methods
- A split-plot design was employed with four irrigation treatments (100% ETc-100% ETc, 80% ETc-60% ETc, 60% ETc-80% ETc, 40% ETc-40% ETc) and three biochar rates (0, 15, 20 t/ha).
- Measurements included soil saturated hydraulic conductivity, leaf area index (LAI), dry biomass, chlorophyll content, stomatal conductance, transpiration, photosynthesis, intrinsic water use efficiency (iWUE), and yield.
- Data were analyzed across two years under West Texas climatic conditions.
Main Results
- Severe deficit irrigation (40% ETc-40% ETc) significantly reduced chlorophyll content, stomatal conductance, transpiration, photosynthesis, and iWUE, especially during hot, dry periods.
- Leaf area index (LAI) and dry biomass decreased by 52% and 47% respectively under severe DI (40% ETc-40% ETc) compared to full irrigation (100% ETc-100% ETc).
- Yield penalties due to water stress were 14%, 16%, and 34% for moderate to severe DI levels (80% ETc-60% ETc, 60% ETc-80% ETc, 40% ETc-40% ETc), respectively. Biochar amendment (15 and 20 t/ha) increased soil hydraulic conductivity but had minimal impact on cucumber growth and yield.
Conclusions
- A deficit irrigation strategy of 80% ETc-60% ETc is recommended as a viable alternative to full irrigation, saving 25% water with only a 14% yield penalty.
- Biochar application did not significantly enhance cucumber growth or yield in this study, suggesting a need for further research on its long-term effects and optimal application rates.
- Integrated water management strategies are crucial for sustainable agriculture in arid and semi-arid regions, with deficit irrigation showing promise for water conservation.
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