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 8
Claim · model-written summary
Seedlings with zero irrigation had the least growth in all parameters measured.
- 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
Growth was stimulated by irrigation, with a threshold at 0.2 L/week for pepper, tomato and watermelon seedlings.
- Taxon
- pepper, tomato and watermelone0
- Treatment
- irrigatione0
- Outcome
- growthe0
- Direction
- stimulatede0
- Qualifier
- threshold at 0.2 L/weeke0
Not reportedComparator
Verbatim
e0“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 in all species increased with irrigation.
- Taxon
- beans, pepper, tomato and watermelont0
- Treatment
- irrigatione0
- Outcome
- Biomass accumulatione0
- Direction
- increasede0
Not reportedComparator
Verbatim
t0“beans, pepper, tomato and watermelon”
e0“Biomass accumulation in all species increased with irrigation but WUE decreased”
Claim · model-written summary
Water use efficiency (WUE) decreased with irrigation in all species.
Not reportedComparator
Verbatim
t0“beans, pepper, tomato and watermelon”
e0“Biomass accumulation in all species increased with irrigation but WUE decreased”
Claim · model-written summary
The quantum efficiency of photosystem II photochemistry of beans and watermelon increased to 0.8 as irrigation increased.
- Taxon
- beans and watermelone0
- Treatment
- irrigatione0
- Outcome
- quantum efficiency of photosystem II photochemistrye0
- Direction
- increasede0
- Value
- 0.8e0
Not reportedComparator
Verbatim
e0“The quantum efficiency of photosystem II photochemistry of beans and watermelon increased to 0.8 as irrigation increased”
Claim · model-written summary
The quantum efficiency of photosystem II photochemistry of pepper and tomato remained low in all irrigation treatments, indicating stress.
- Taxon
- pepper and tomatoe0
- Treatment
- all treatmentse0
- Outcome
- quantum efficiency of photosystem II photochemistrye1
- Direction
- remained lowe0
Not reportedComparator
Verbatim
e1“The quantum efficiency of photosystem II photochemistry of beans”
e0“pepper and tomato remained low in all treatments, indicating stress”
Claim · model-written summary
Beans and watermelon seedlings were more resistant to soil moisture deficit than tomato and pepper seedlings.
Verbatim
e0“beans and watermelon seedlings were more resistant to soil moisture deficit than tomato and pepper seedlings”
Claim · model-written summary
Early farm management should consider appropriate irrigation volumes for better and more vigorous crops in the field.
Verbatim
e0“Early farm management should consider appropriate irrigation volumes for better and more vigorous crops in the field”
The same questions in other papers
irrigation · physiology: photosynthesis · Phaseolus vulgaris (common bean)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- no effect
3 papers more in this group
See all 7 papers →irrigation · physiology: photosynthesis · Citrullus lanatus (watermelon)Results agree
1 paper in the same direction as this paper
- positive
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.