Abstract
A study was made on the effect of arsenic (As) and As X P interaction in Boro rice and its residual effect in succeeding T. Aman rice. Arsenic was added to soil (having 2.6 ppm initial As) @ 0, 15 and 30 mg As kg -1 from Na2HAsO4.7H2O and phosphorus @ 0, 20, 40, 60 and 80 mg P kg-1 from KH2PO4. Each pot had received 100 ppm N, 40 ppm K and 25 ppm S from urea, MoP and gypsum, respectively. The grain yield of Boro rice was reduced by 20.6 % for 15 ppm As treatment and 63.8 % due to 30 ppm As. Such reductions for straw yield were 21.0 and 65.2 % with these two As treatments, respectively. Residual effect of arsenic was also significant and negative in T. Aman rice. The grain-As concentration in all cases was below 1 ppm, and the straw-As content was well above 1 ppm. The arsenic concentrations of both grain and straw were lower in T. Aman rice than in Boro rice. The adverse effect of arsenic was further enhanced by P addition. This reaction has an implication to P fertilizer management in rice.Keywords: Arsenic; Phosphorus; RiceDOI: 10.3329/jbau.v6i2.4822 J. Bangladesh Agril. Univ. 6(2): 277-284, 2008
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Claims 10
Claim · model-written summary
Soil arsenic at 15 ppm reduced grain yield of Boro rice by 20.6%.
Not reportedComparator
Verbatim
e1“The grain yield of Boro rice was reduced by 20.6 % for 15 ppm As treatment”
Claim · model-written summary
Soil arsenic at 30 ppm reduced grain yield of Boro rice by 63.8%.
Not reportedComparator
Verbatim
e1“The grain yield of Boro rice was reduced by 20.6 % for 15 ppm As treatment and 63.8 % due to 30 ppm As”
Claim · model-written summary
The 15 ppm arsenic treatment reduced straw yield of rice by 21.0%.
- Taxon
- rice
Oryza sativat0 - Treatment
- 15 ppm As treatmente2
- Outcome
- straw yielde1
- Direction
- reductionse1
- Value
- 21.0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Such reductions for straw yield were 21.0 and 65.2 % with these two As treatments, respectively”
e2“15 ppm As treatment”
t0“rice”
Claim · model-written summary
The 30 ppm arsenic treatment reduced straw yield of rice by 65.2%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Such reductions for straw yield were 21.0 and 65.2 % with these two As treatments, respectively”
e2“due to 30 ppm As”
t0“rice”
Claim · model-written summary
The residual effect of arsenic on succeeding T. Aman rice was significant and negative.
Not reportedComparator
Verbatim
e1“Residual effect of arsenic was also significant and negative in T. Aman rice”
Claim · model-written summary
Grain arsenic concentration in rice was below 1 ppm in all cases.
- Taxon
- riceOryza sativat0
- Outcome
- grain-As concentratione1
- Direction
- belowe1
- Value
- 1 ppme1
- Qualifier
- in all casese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The grain-As concentration in all cases was below 1 ppm”
t0“rice”
Claim · model-written summary
Straw arsenic content in rice was well above 1 ppm.
- Taxon
- riceOryza sativat0
- Outcome
- straw-As contente1
- Direction
- abovee1
- Value
- 1 ppme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the straw-As content was well above 1 ppm”
t0“rice”
Claim · model-written summary
Arsenic concentrations of both grain and straw were lower in T. Aman rice than in Boro rice.
Verbatim
e1“The arsenic concentrations of both grain and straw were lower in T. Aman rice than in Boro rice”
Claim · model-written summary
Phosphorus addition further enhanced the adverse effect of arsenic in rice.
- Taxon
- riceOryza sativat0
- Treatment
- P additione1
- Outcome
- adverse effect of arsenice1
- Direction
- enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The adverse effect of arsenic was further enhanced by P addition”
t0“rice”
Claim · model-written summary
The authors state that the arsenic-phosphorus reaction has an implication for P fertilizer management in rice.
- Taxon
- riceOryza sativae1
- Outcome
- P fertilizer managemente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This reaction has an implication to P fertilizer management in rice”
The same questions in other papers
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- negative
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See all 168 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.