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.
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Claims 9
Claim · model-written summary
15 ppm arsenic reduced Boro rice grain yield by 20.6%.
Not reportedComparator
Verbatim
e0“The grain yield of Boro rice was reduced by 20.6 % for 15 ppm As treatment”
Claim · model-written summary
30 ppm arsenic reduced Boro rice grain yield by 63.8%.
Not reportedComparator
Verbatim
e0“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
15 ppm arsenic reduced Boro rice straw yield by 21.0%.
- Taxon
- rice
Oryza sativat0 - Treatment
- two As treatmentse0
- Outcome
- straw yielde0
- Direction
- reductionse0
- Value
- 21.0e0
- Qualifier
- respectivelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Such reductions for straw yield were 21.0 and 65.2 % with these two As treatments, respectively”
t0“rice”
Claim · model-written summary
30 ppm arsenic reduced Boro rice straw yield by 65.2%.
- Taxon
- riceOryza sativat0
- Treatment
- two As treatmentse0
- Outcome
- straw yielde0
- Direction
- reductionse0
- Value
- 65.2 %e0
- Qualifier
- respectivelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Such reductions for straw yield were 21.0 and 65.2 % with these two As treatments, respectively”
t0“rice”
Claim · model-written summary
Residual arsenic adversely affected T. Aman rice.
Not reportedComparator
Verbatim
e0“Residual effect of arsenic was also significant and negative in T. Aman rice”
Claim · model-written summary
Rice grain arsenic concentration was below 1 ppm in every case.
- Taxon
- riceOryza sativat0
- Outcome
- grain-As concentratione0
- Direction
- belowe0
- Value
- 1 ppme0
- Qualifier
- in all casese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain-As concentration in all cases was below 1 ppm”
t0“rice”
Claim · model-written summary
Rice straw arsenic content was above 1 ppm.
- Taxon
- riceOryza sativat0
- Outcome
- straw-As contente0
- Direction
- well abovee0
- Value
- 1 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the straw-As content was well above 1 ppm”
t0“rice”
Claim · model-written summary
Grain and straw arsenic concentrations were lower in T. Aman than Boro rice.
Verbatim
e0“The arsenic concentrations of both grain and straw were lower in T. Aman rice than in Boro rice”
Claim · model-written summary
Adding phosphorus enhanced the adverse arsenic effect.
- Taxon
- riceOryza sativat0
- Treatment
- P additione0
- Outcome
- adverse effect of arsenice0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The adverse effect of arsenic was further enhanced by P addition”
t0“rice”
The same questions in other papers
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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.