Abstract
The current decline in freshwater resources presents a significant global challenge to crop production, a situation expected to intensify with ongoing climate change. This underscores the need for extensive research to enhance crop yields under drought conditions, a priority for scientists given its vital role in global food security. Our study explores the effects of using humic and chitosan treatments to alleviate drought stress during critical growth phases and their impact on crop yield and water efficiency. We employed four different irrigation strategies: full irrigation, 70% irrigation at the early vine development stage, 70% irrigation during the storage root bulking stage, and 85% irrigation across both stages, complemented by full irrigation in other periods. The plants received either humic treatments through foliar spray or soil application, or chitosan foliar applications, with tap water serving as a control. Our findings highlight that the early vine development stage is particularly vulnerable to drought, with a 42.0% decrease in yield observed under such conditions. In normal growth scenarios, foliar application of humic substances significantly improved growth parameters, resulting in a substantial increase in yield and water efficiency by 66.9% and 68.4%, respectively, compared to the control treatment under full irrigation. For sweet potatoes irrigated with 70% water at the storage root bulking stage, ground application of humic substances outperformed both foliar applications of chitosan and humic in terms of yield results. The highest tuber yield and water efficiency were attained by combining chitosan and humic ground applications, regardless of whether 70% irrigation was used at the storage root bulking stage or 85% irrigation during both the early vine development and storage root bulking stages.
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Claims 6
Claim · model-written summary
Drought during the early vine development stage decreased sweet potato yield by 42.0%.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatast1 - Organ / stage
- early vine development stagee1
- Treatment
- droughte1
- Outcome
- yielde1
- Direction
- decreasee1
- Value
- 42.0%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
t1“sweet potato”
e1“early vine development stage is particularly vulnerable to drought, with a 42.0% decrease in yield observed under such conditions”
Claim · model-written summary
Foliar humic substance application increased sweet potato yield by 66.9% compared with the control under full irrigation in normal growth scenarios.
- Taxon
- sweet potatoIpomoea batatast1
- Treatment
- foliar application of humic substancese2
- Outcome
- yielde2
- Direction
- increasee2
- Value
- 66.9%e2
- Qualifier
- In normal growth scenariose2
- Comparator
- control treatment under full irrigatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“sweet potato”
e2“In normal growth scenarios, foliar application of humic substances significantly improved growth parameters, resulting in a substantial increase in yield and water efficiency by 66.9% and 68.4%, respectively, compared to the control treatment under full irrigation”
Claim · model-written summary
Foliar humic substance application increased sweet potato water efficiency by 68.4% compared with the control under full irrigation in normal growth scenarios.
- Taxon
- sweet potatoIpomoea batatast1
- Treatment
- foliar application of humic substancese2
- Outcome
- water efficiencye2
- Direction
- increasee2
- Value
- 68.4%e2
- Qualifier
- In normal growth scenariose2
- Comparator
- control treatment under full irrigatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“sweet potato”
e2“In normal growth scenarios, foliar application of humic substances significantly improved growth parameters, resulting in a substantial increase in yield and water efficiency by 66.9% and 68.4%, respectively, compared to the control treatment under full irrigation”
Claim · model-written summary
Foliar humic substance application significantly improved sweet potato growth parameters in normal growth scenarios.
- Taxon
- sweet potatoIpomoea batatast1
- Treatment
- foliar application of humic substancese2
- Outcome
- growth parameterse2
- Direction
- improvede2
- Qualifier
- In normal growth scenariose2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“sweet potato”
e2“In normal growth scenarios, foliar application of humic substances significantly improved growth parameters, resulting in a substantial increase in yield and water efficiency by 66.9% and 68.4%, respectively, compared to the control treatment under full irrigation”
Claim · model-written summary
Ground humic application outperformed foliar chitosan and foliar humic applications for sweet potato yield when irrigated with 70% water at the storage root bulking stage.
- Taxon
- sweet potatoesIpomoea batatase3
- Organ / stage
- storage root bulking stagee3
- Treatment
- ground application of humic substancese3
- Outcome
- yield resultse3
- Direction
- outperformede3
- Qualifier
- irrigated with 70% watere3
- Comparator
- foliar applications of chitosan and humice3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“For sweet potatoes irrigated with 70% water at the storage root bulking stage, ground application of humic substances outperformed both foliar applications of chitosan and humic in terms of yield results”
Claim · model-written summary
Combining chitosan and humic ground applications gave the highest tuber yield and water efficiency in sweet potato.
- Taxon
- sweet potatoIpomoea batatast1
- Treatment
- combining chitosan and humic ground applicationse4
- Outcome
- tuber yield and water efficiencye4
- Direction
- higheste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t1“sweet potato”
e4“The highest tuber yield and water efficiency were attained by combining chitosan and humic ground applications”
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