Abstract
With changing rainfall patterns, deforestation and degradation of arable land, freshwater resources for irrigation are reducing, increasing the potential for drought stress on crops. The aim of this research was to study the growth and ecophysiological responses of beans, pepper, tomato and watermelon potted and grown in screenhouse under varied irrigation, for 14 days. There were three treatments: zero irrigation after seedling establishment, 0.1 L/pot/week, 0.2 L/pot/week and 0.3 L/pot/week respectively, each pot with three plants, in a completely randomized design with 3 replicates. Growth and ecophysiological measurements were recorded for the first three weeks of growth. ANOVA and Pearson Correlation were conducted, with significance at α 0.05. Plants with zero irrigation had the least growth in all parameters measured; growth was stimulated by irrigation, with a threshold at 0.2 L/week (corresponding to 2200 mm, the mean annual rainfall for the region) for pepper, tomato and watermelon seedlings. Biomass accumulation in all species increased with irrigation but WUE decreased. The quantum efficiency of photosystem II photochemistry of beans and watermelon increased to 0.8 as irrigation increased, while pepper and tomato remained low in all treatments, indicating stress. These results show that early seedling stages are sensitive to drought; however, beans and watermelon seedlings were more resistant to soil moisture deficit than tomato and pepper seedlings. Early farm management should consider appropriate irrigation volumes for better and more vigorous crops in the field. This is essential in a future where irrigation water deficits are predicted to increase during the cropping seasons.
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Claims 9
Claim · model-written summary
Zero irrigation gave the least growth in all measured parameters of the seedlings.
- Taxon
- beans, pepper, tomato and watermelont0
- Treatment
- zero irrigatione0
- Outcome
- growth in all parameters measurede0
- Direction
- leaste0
Not reportedComparator
Verbatim
t0“beans, pepper, tomato and watermelon”
e0“Plants with zero irrigation had the least growth in all parameters measured”
Claim · model-written summary
Irrigation stimulated growth of pepper, tomato and watermelon seedlings, with a threshold at 0.2 L/week.
- Taxon
- pepper, tomato and watermelone1
- Treatment
- irrigatione1
- Outcome
- growthe1
- Direction
- stimulatede1
- Qualifier
- threshold at 0.2 L/weeke1
Not reportedComparator
Verbatim
t0“beans, pepper, tomato and watermelon”
e1“growth was stimulated by irrigation, with a threshold at 0.2 L/week (corresponding to 2200 mm, the mean annual rainfall for the region) for pepper, tomato and watermelon seedlings”
Claim · model-written summary
Biomass accumulation of all species increased with irrigation.
- Taxon
- beans, pepper, tomato and watermelont0
- Treatment
- irrigatione2
- Outcome
- Biomass accumulatione2
- Direction
- increasede2
Not reportedComparator
Verbatim
t0“beans, pepper, tomato and watermelon”
e2“Biomass accumulation in all species increased with irrigation but WUE decreased”
Claim · model-written summary
Water use efficiency (WUE) decreased with irrigation.
Not reportedComparator
Verbatim
t0“beans, pepper, tomato and watermelon”
e2“Biomass accumulation in all species increased with irrigation but WUE decreased”
Claim · model-written summary
Quantum efficiency of photosystem II photochemistry of beans and watermelon increased to 0.8 as irrigation increased.
- Taxon
- beans and watermelone3
- Treatment
- irrigatione3
- Outcome
- quantum efficiency of photosystem II photochemistrye3
- Direction
- increasede3
- Value
- 0.8e3
Not reportedComparator
Verbatim
t0“beans, pepper, tomato and watermelon”
e3“The quantum efficiency of photosystem II photochemistry of beans and watermelon increased to 0.8 as irrigation increased, while pepper and tomato remained low in all treatments”
Claim · model-written summary
Pepper and tomato kept low quantum efficiency of photosystem II photochemistry in all treatments.
Verbatim
t0“beans, pepper, tomato and watermelon”
e3“The quantum efficiency of photosystem II photochemistry of beans and watermelon increased to 0.8 as irrigation increased, while pepper and tomato remained low in all treatments”
Claim · model-written summary
Beans and watermelon seedlings were more resistant to soil moisture deficit than tomato and pepper seedlings.
Verbatim
t0“beans, pepper, tomato and watermelon”
e4“beans and watermelon seedlings were more resistant to soil moisture deficit than tomato and pepper seedlings”
Claim · model-written summary
Early seedling stages are sensitive to drought.
Verbatim
t0“beans, pepper, tomato and watermelon”
e5“early seedling stages are sensitive to drought”
Claim · model-written summary
Farm management should consider appropriate irrigation volumes for better and more vigorous field crops.
Verbatim
e6“Early farm management should consider appropriate irrigation volumes for better and more vigorous crops in the field”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.