Abstract
Drip-irrigation can improve uniformity in water distribution, water use efficiency, and crop productivity in the saline and nonsaline regions of South Asia and in Bangladesh where the availability and quality of water resources are scare for sustainable crop production. However, the currently available drip-irrigation systems (DIS) have limitations especially in the design and field performance of emitters. A new type of emitter with low pressure (gravity) was developed, installed and evaluated using the locally produced materials in two locations (nonsaline and saline zones) of Bangladesh. The emitter discharge rate was measured for the variable operating heads of 1.5, 2, and 2.5 meter (m) with 0%, 1%, and 1.5% slopes with eggplant (Solanum melongena L.), a commonly grown vegetable in the region. The tested parameters of the emitter were manufacturer coefficient of variation (CVm), emission uniformity (EU), coefficient of uniformity (CU), and the statistical uniformity (Us) of water application. Our results reveal that the discharge rates of the emitter varied from 3 to 5 L h−1 under the operating head of 1.5 to 2.5 m with the slope of 0–1.5%, with better performance of the DIS at 2 m operating pressure head and for slopes of 0% and 1%. The CU of all the test parameters was more than 80%, implying that the DIS was designed and installed with appropriate dimensions for the efficient application and distribution of water to the individual plants, with the emitter performance classified as fair to excellent considering water application and distribution, as well as crop yield. The new emitter used for DIS in field conditions showed that the eggplant yield, water use, and water productivity were greater by 4.6%, 38%, and 70%, respectively, compared to farmers’ irrigation practice. We conclude that the DIS has a great prospect to save water, and could be a convenient irrigation water application method for sustainable crop production in saline and nonsaline regions of Bangladesh and similar soil and climatic conditions in South Asia.
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Claims 7
Claim · model-written summary
Emitter discharge ranged from 3 to 5 L h−1 across the tested pressure heads and slopes.
- Taxon
- eggplant
Solanum melongenae1 - Outcome
- discharge rates of the emittere0
- Value
- 3 to 5 L h−1e0
- Qualifier
- operating head of 1.5 to 2.5 m with the slope of 0–1.5%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“discharge rates of the emitter varied from 3 to 5 L h−1 under the operating head of 1.5 to 2.5 m with the slope of 0–1.5%”
e1“with eggplant (Solanum melongena L.)”
Claim · model-written summary
The system performed better at a 2 m operating head and slopes of 0% and 1%.
- Taxon
- eggplantSolanum melongenae1
- Outcome
- better performance of the DISe0
- Value
- 2 me0
- Qualifier
- slopes of 0% and 1%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“better performance of the DIS at 2 m operating pressure head and for slopes of 0% and 1%.”
e1“with eggplant (Solanum melongena L.)”
Claim · model-written summary
The coefficient of uniformity exceeded 80%.
- Taxon
- eggplantSolanum melongenae1
- Outcome
- CU of all the test parameterse0
- Value
- more than 80%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The CU of all the test parameters was more than 80%”
e1“with eggplant (Solanum melongena L.)”
Claim · model-written summary
The drip system increased eggplant yield by 4.6% relative to farmer irrigation.
- Taxon
- eggplantSolanum melongenae0
- Treatment
- DISe1
- Outcome
- eggplant yielde0
- Direction
- greatere0
- Value
- 4.6%e0
- Comparator
- farmers’ irrigation practicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the eggplant yield, water use, and water productivity were greater by 4.6%, 38%, and 70%, respectively, compared to farmers’ irrigation practice.”
e1“The new emitter used for DIS in field conditions”
Claim · model-written summary
The drip system increased water use by 38% relative to farmer irrigation.
- Taxon
- eggplantSolanum melongenae0
- Treatment
- DISe1
- Outcome
- water usee0
- Direction
- greatere0
- Value
- 38%e0
- Comparator
- farmers’ irrigation practicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the eggplant yield, water use, and water productivity were greater by 4.6%, 38%, and 70%, respectively, compared to farmers’ irrigation practice.”
e1“The new emitter used for DIS in field conditions”
Claim · model-written summary
The drip system increased water productivity by 70% relative to farmer irrigation.
- Taxon
- eggplantSolanum melongenae0
- Treatment
- DISe1
- Outcome
- water productivitye0
- Direction
- greatere0
- Value
- 70%e0
- Comparator
- farmers’ irrigation practicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the eggplant yield, water use, and water productivity were greater by 4.6%, 38%, and 70%, respectively, compared to farmers’ irrigation practice.”
e1“The new emitter used for DIS in field conditions”
Claim · model-written summary
The authors conclude the drip system could support water saving and crop production in comparable regions.
- Taxon
- eggplantSolanum melongenat0
- Outcome
- save watere0
- Setting
- Bangladeshe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the DIS has a great prospect to save water, and could be a convenient irrigation water application method for sustainable crop production in saline and nonsaline regions of Bangladesh and similar soil and climatic conditions in South Asia.”
t0“Development and Evaluation of an Emitter with a Low-Pressure Drip-Irrigation System for Sustainable Eggplant Production”
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See all 48 papers →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.