Abstract
To study the effect of different urea fertilizer rates and plant populations on disease severity of bacterial blight of rice and yield lasses related to disease, the experiments including three plant populations (110000, 150000, 190000) and five urea fertilizer rates (0,56 lb, 112 lb, 168 lb and 224 lb per acre) were conducted at Central Agriculture Research Institute farm in 1999 and 2000 rainy seasons. Manawthukha was used as a test variety that is susceptible to bacterial blight of rice. The disease severity could be increased by the application of urea. Although urea 112 lb per acre gave moderate disease severity than without urea, its yield is highest. The higher disease severity also showed the related effect of plant population of 150000 and above. However the combination of urea 224 lb per acre with the population of 190000 and 150000 gave the highest severity of bacterial blight disease and the minimum grain yield. The application of urea 224 lbs per acre can cause yield reduction ranging from 18.67 percent to 27.57 percent over the application of urea 112 lb per acre.
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Claims 7
Claim · model-written summary
Urea application increased bacterial blight severity.
- Taxon
- rice
Oryza sativat0 - Treatment
- application of ureae0
- Interactor
- bacterial blightt0pathogen
- Outcome
- disease severitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The disease severity could be increased by the application of urea”
t0“bacterial blight (BB) of rice”
Claim · model-written summary
Urea at 112 lb per acre gave moderate blight severity relative to no urea.
- Taxon
- riceOryza sativat0
- Treatment
- urea 112 lb per acree0
- Interactor
- bacterial blightt0pathogen
- Outcome
- disease severitye0
- Direction
- moderatee0
- Comparator
- without ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“urea 112 lb per acre gave moderate disease severity than without urea”
t0“bacterial blight (BB) of rice”
Claim · model-written summary
Urea at 112 lb per acre produced the highest yield.
- Taxon
- riceOryza sativat0
- Treatment
- urea 112 lb per acree0
- Outcome
- yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“urea 112 lb per acre gave moderate disease severity than without urea, its yield is highest”
t0“rice”
Claim · model-written summary
Plant populations of 150000 and above were associated with higher disease severity.
- Taxon
- riceOryza sativat0
- Treatment
- plant population of 150000 and abovee0
- Interactor
- bacterial blightt0pathogen
- Outcome
- disease severitye0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher disease severity also showed the related effect of plant population of 150000 and above”
t0“bacterial blight (BB) of rice”
Claim · model-written summary
Urea 224 lb per acre with populations of 190000 and 150000 gave highest blight severity.
- Taxon
- riceOryza sativat0
- Treatment
- urea 224 lb per acre with the population of 190000 and 150000e0
- Interactor
- bacterial blighte0pathogen
- Outcome
- severity of bacterial blight diseasee0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination of urea 224 lb per acre with the population of 190000 and 150000 gave the highest severity of bacterial blight disease”
t0“rice”
Claim · model-written summary
The same high-urea, high-population combination gave minimum grain yield.
- Taxon
- riceOryza sativat0
- Treatment
- urea 224 lb per acre with the population of 190000 and 150000e0
- Outcome
- grain yielde0
- Direction
- minimume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination of urea 224 lb per acre with the population of 190000 and 150000 gave the highest severity of bacterial blight disease and the minimum grain yield”
t0“rice”
Claim · model-written summary
Urea 224 lbs per acre reduced yield by 18.67 to 27.57 percent compared with 112 lb per acre.
- Taxon
- riceOryza sativat0
- Treatment
- urea 224 lbs per acree0
- Outcome
- yielde0
- Direction
- reductione0
- Value
- 18.67 percent to 27.57 percente0
- Comparator
- urea 112 lb per acree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“urea 224 lbs per acre can cause yield reduction ranging from 18.67 percent to 27.57 percent over the application of urea 112 lb per acre”
t0“rice”
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