Abstract
Understanding the crop growth and yield response to variable irrigation and the relationship between crop eco-physiological and morphological parameters is critical for identifying a balanced irrigation management strategy and developing decision support systems for early detection and information for on-ground decisions. Experiments were conducted to evaluate the effect of variable irrigation treatments on dry bean [Phaseolus vulgaris L.] growth traits (plant height, leaf area index, normalized difference vegetation index), seed yield (SY), and yield components (pods plant−1, seeds pod−1, 100-seed weight (SW), and pod harvest index (PHI)) and to develop empirical models between dry bean growth and environmental conditions, SY, and yield components. Five irrigation treatments i.e., FIT (full irrigation treatment), 125% FIT, 75% FIT, 50% FIT, and 25% FIT were investigated. Water deficit at the beginning of the crop growth [vegetative growth (V1-V2) stage], dramatically reduced dry bean growth and development and resulted in a significant reduction in SY. However, the degree to which vegetative growth and SY was reduced depends on the weather conditions. Reducing irrigation by 25% below FIT resulted in an average reduction of 30% in SY. This reduction in SY was significantly correlated with a decline in pods plant−1 and SW. Moreover, the empirical models between growth traits and growing degree days (GDD) have a strong correlation, while growth traits and SY and yield components are moderately correlated. The data and empirical models presented in this research provide valuable information in predicting and estimating dry bean SY in-season and allow for corrective management decisions.
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Claims 11
Claim · model-written summary
Early vegetative water deficit sharply reduced dry bean growth and development.
- Taxon
- dry beane0
- Organ / stage
- vegetative growth (V1-V2) stagee0
- Treatment
- Water deficite0
- Outcome
- dry bean growth and developmente0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Water deficit at the beginning of the crop growth [vegetative growth (V1-V2) stage], dramatically reduced dry bean growth and development”
Claim · model-written summary
Early vegetative water deficit significantly reduced seed yield.
Not reportedComparator
Verbatim
e0“Water deficit at the beginning of the crop growth [vegetative growth (V1-V2) stage], dramatically reduced dry bean growth and development and resulted in a significant reduction in SY”
Claim · model-written summary
Weather conditions affected the degree of vegetative growth reduction.
Verbatim
e0“the degree to which vegetative growth and SY was reduced depends on the weather conditions”
t0“Dry Bean”
Claim · model-written summary
Weather conditions affected the degree of seed yield reduction.
Verbatim
e0“the degree to which vegetative growth and SY was reduced depends on the weather conditions”
t0“Dry Bean”
Claim · model-written summary
Irrigation 25% below full irrigation reduced seed yield by 30% on average.
Verbatim
e0“Reducing irrigation by 25% below FIT resulted in an average reduction of 30% in SY”
t0“Dry Bean”
Claim · model-written summary
Seed yield reduction correlated significantly with fewer pods per plant.
Verbatim
e0“This reduction in SY was significantly correlated with a decline in pods plant−1 and SW”
t0“Dry Bean”
Claim · model-written summary
Seed yield reduction correlated significantly with lower 100-seed weight.
Verbatim
e0“This reduction in SY was significantly correlated with a decline in pods plant−1 and SW”
t0“Dry Bean”
Claim · model-written summary
Growth-trait and growing-degree-day models showed strong correlation.
Verbatim
e0“empirical models between growth traits and growing degree days (GDD) have a strong correlation”
t0“Dry Bean”
Claim · model-written summary
Growth traits and seed yield were moderately correlated.
Not reportedDirection
Verbatim
e0“growth traits and SY and yield components are moderately correlated”
t0“Dry Bean”
Claim · model-written summary
Growth traits and yield components were moderately correlated.
Not reportedDirection
Verbatim
e0“growth traits and SY and yield components are moderately correlated”
t0“Dry Bean”
Claim · model-written summary
The empirical models support in-season prediction of dry bean seed yield.
Not reportedComparator
Verbatim
e0“empirical models presented in this research provide valuable information in predicting and estimating dry bean SY in-season”
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