Abstract
Zinc seed treatments for rice ( Oryza sativa L.) were previously evaluated as an alternative to soil‐applied Zn. Recommendations concerning the effectiveness of Zn seed treatments were never clearly stated. Our objectives were to evaluate the utility of Zn seed treatments for supplying Zn to rice grown on soils prone to Zn deficiency. In 1998, a study with three cultivars compared Zn‐treated seeds [2.8 g Zn (kg seed) −1 ] with a control and 11 kg Zn ha −1 as ZnSO 4 applied to the soil. Because tissue Zn concentration did not differ among cultivars, a single cultivar, Drew, was used in studies at two locations in 1999. The control and the soil‐applied Zn were compared with seeds that were treated with three rates of ZnSO 4 and ZnEDTA (ethylenediaminetetraacetic acid). Analysis showed net seed concentrations of 1.0, 2.2, and 4.7 g Zn (kg seed) −1 as ZnSO 4 and 1.4, 2.8, and 5.7 g Zn (kg seed) −1 as ZnEDTA. In 1998, neither visual Zn deficiency symptoms nor significant yield differences were observed among treatments. Soil‐applied Zn and Zn seed treatments increased tissue Zn concentration by 11.9 and 4.7 mg Zn kg −1 , respectively, above that of the control (19.7 mg Zn kg −1 ). In 1999, Zn deficiency occurred at both locations. Measurements of dry matter, tissue Zn concentration, and grain yield showed that Zn‐treated seed performed equal to or better than soil‐applied Zn. These data suggest that seed Zn concentrations between 2.2 to 5.7 g Zn (kg seed) −1 are an economical alternative to soil‐applied Zn.
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Claims 9
Claim · model-written summary
In 1998, neither visual zinc deficiency symptoms nor significant yield differences were observed among treatments.
- Taxon
- rice
Oryza sativae0 - Outcome
- significant yield differencese1
- Setting
- 1998e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc seed treatments for rice ( Oryza sativa L.)”
e1“In 1998, neither visual Zn deficiency symptoms nor significant yield differences were observed among treatments”
Claim · model-written summary
Soil-applied zinc increased tissue Zn concentration by 11.9 mg Zn kg-1 above the control.
- Taxon
- riceOryza sativae0
- Treatment
- Soil‐applied Zne2
- Outcome
- tissue Zn concentratione2
- Direction
- increasede2
- Value
- 11.9e2
- Qualifier
- 19.7 mg Zn kg −1e2
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc seed treatments for rice ( Oryza sativa L.)”
e2“Soil‐applied Zn and Zn seed treatments increased tissue Zn concentration by 11.9 and 4.7 mg Zn kg −1 , respectively, above that of the control (19.7 mg Zn kg −1 )”
Claim · model-written summary
Zinc seed treatments increased tissue Zn concentration by 4.7 mg Zn kg-1 above the control.
- Taxon
- riceOryza sativae0
- Treatment
- Zn seed treatmentse2
- Outcome
- tissue Zn concentratione2
- Direction
- increasede2
- Value
- 4.7e2
- Qualifier
- 19.7 mg Zn kg −1e2
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc seed treatments for rice ( Oryza sativa L.)”
e2“Soil‐applied Zn and Zn seed treatments increased tissue Zn concentration by 11.9 and 4.7 mg Zn kg −1 , respectively, above that of the control (19.7 mg Zn kg −1 )”
Claim · model-written summary
In 1999, zinc deficiency occurred at both locations.
- Taxon
- riceOryza sativae0
- Outcome
- Zn deficiencye3
- Setting
- both locationse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc seed treatments for rice ( Oryza sativa L.)”
e3“In 1999, Zn deficiency occurred at both locations”
Claim · model-written summary
Zn-treated seed performed equal to or better than soil-applied Zn in dry matter, tissue Zn concentration and grain yield.
- Taxon
- riceOryza sativae0
- Treatment
- Zn‐treated seede4
- Outcome
- dry matter, tissue Zn concentration, and grain yielde4
- Direction
- equal to or better thane4
- Comparator
- soil‐applied Zne4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc seed treatments for rice ( Oryza sativa L.)”
e4“Measurements of dry matter, tissue Zn concentration, and grain yield showed that Zn‐treated seed performed equal to or better than soil‐applied Zn”
Claim · model-written summary
Seed Zn concentrations of 2.2 to 5.7 g Zn per kg seed are an economical alternative to soil-applied Zn.
- Taxon
- riceOryza sativae0
- Treatment
- seed Zn concentrations between 2.2 to 5.7 g Zn (kg seed) −1e5
- Outcome
- economical alternative to soil-applied Zne5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc seed treatments for rice ( Oryza sativa L.)”
e5“These data suggest that seed Zn concentrations between 2.2 to 5.7 g Zn (kg seed) −1 are an economical alternative to soil-applied Zn”
Claim · model-written summary
Tissue Zn concentration did not differ among the cultivars tested.
- Taxon
- riceOryza sativae0
- Material
- cultivarse6
- Outcome
- tissue Zn concentratione6
- Direction
- did not differe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc seed treatments for rice ( Oryza sativa L.)”
e6“Because tissue Zn concentration did not differ among cultivars, a single cultivar, Drew, was used in studies at two locations in 1999”
Claim · model-written summary
Seed treatment with ZnSO4 gave net seed concentrations of 1.0, 2.2 and 4.7 g Zn per kg seed.
- Taxon
- riceOryza sativae0
- Treatment
- ZnSO 4e7
- Outcome
- net seed concentrationse7
- Value
- 1.0, 2.2, and 4.7 g Zn (kg seed) −1e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc seed treatments for rice ( Oryza sativa L.)”
e7“Analysis showed net seed concentrations of 1.0, 2.2, and 4.7 g Zn (kg seed) −1 as ZnSO 4”
Claim · model-written summary
Seed treatment with ZnEDTA gave net seed concentrations of 1.4, 2.8 and 5.7 g Zn per kg seed.
- Taxon
- riceOryza sativae0
- Treatment
- ZnEDTAe1
- Outcome
- net seed concentrationse7
- Value
- 1.4, 2.8, and 5.7 g Zn (kg seed) −1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc seed treatments for rice ( Oryza sativa L.)”
e1“1.4, 2.8, and 5.7 g Zn (kg seed) −1 as ZnEDTA”
e7“Analysis showed net seed concentrations of 1.0, 2.2, and 4.7 g Zn (kg seed) −1 as ZnSO 4”
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See all 18 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.