Abstract
Abstract Iron deficiency in grain sorghum (Sorghum bicolor (L.) Moench) is a major problem in many soils in the Western Great Plains. Yield response to applied iron and other micronutrients is not always predictable due to the many complex interactions that exist among micronutrients and specifically with P and Fe. Any information gained will help solve the enigma surrounding the complexity of these reactions and will eventually lead to practical solutions of Fe deficiency problems. The objectives of this study were to determine the effect of P and Fe applied singly and in combination with other micronutrients on (a) yield and micronutrient concentration of grain sorghum and (b) DTPA extractable Fe. Two soils (Quinlan clay loam ‐ Typic Ustocrept and Spur silt loam ‐ Fluventic Haplustoll) that were deficient in P and Fe were collected from Western Oklahoma for a greenhouse experiment. Soils were kept field moist, mixed thoroughly and placed in pots. Nitrogen, P as ammonium polyphosphate, and micronutrients were applied and soils were cropped to grain sorghum. Two harvests were obtained and dry matter yield, plant composition and effects of P on extractable micronutrients were determined. Effect of P plus micronutrients applied singly and in combinations varied markedly with soil type. Phosphorus plus Fe and micronutrient combinations containing Fe were most effective and exhibited a synergistic effect on yield of dry matter and DTPA extractable Fe. Soil DTPA extractable Fe was significantly correlated with dry matter yield (r2 = 0.81). Phosphorus stimulated root growth and under these experimental conditions enhanced the effect of soil applied Fe. Key words: Dry matterplant compositionmicronutrient uptakesynergistic effectsDTPA Fe
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Claims 4
Claim · model-written summary
Phosphorus plus Fe and micronutrient combinations containing Fe were most effective for dry matter yield and DTPA-extractable Fe than when micronutrients were applied singly.
- Taxon
- grain sorghum
Sorghum bicolore0 - Treatment
- Phosphorus plus Fe and micronutrient combinations containing Fee4
- Outcome
- yield of dry matter and DTPA extractable Fee4
- Direction
- most effectivee4
- Comparator
- applied singlye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abstract Iron deficiency in grain sorghum (Sorghum bicolor (L.) Moench) is a major problem in many soils in the Western Great Plains”
e3“Effect of P plus micronutrients applied singly and in combinations varied markedly with soil type”
e4“Phosphorus plus Fe and micronutrient combinations containing Fe were most effective and exhibited a synergistic effect on yield of dry matter and DTPA extractable Fe”
Claim · model-written summary
Soil DTPA-extractable Fe was significantly correlated with dry matter yield of grain sorghum (r2 = 0.81).
- Taxon
- grain sorghumSorghum bicolore0
- Compound
- DTPA extractable Fee5
- Outcome
- dry matter yielde5
- Direction
- higherinferrede5
- Value
- r2 = 0.81e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abstract Iron deficiency in grain sorghum (Sorghum bicolor (L.) Moench) is a major problem in many soils in the Western Great Plains”
e5“Soil DTPA extractable Fe was significantly correlated with dry matter yield (r2 = 0.81)”
Claim · model-written summary
Phosphorus stimulated root growth of grain sorghum under these experimental conditions.
- Taxon
- grain sorghumSorghum bicolore0
- Treatment
- Phosphoruse6
- Outcome
- root growthe6
- Direction
- stimulatede6
- Qualifier
- under these experimental conditionse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abstract Iron deficiency in grain sorghum (Sorghum bicolor (L.) Moench) is a major problem in many soils in the Western Great Plains”
e6“Phosphorus stimulated root growth and under these experimental conditions enhanced the effect of soil applied Fe”
Claim · model-written summary
Phosphorus enhanced the effect of soil-applied Fe on grain sorghum under these experimental conditions.
- Taxon
- grain sorghumSorghum bicolore0
- Treatment
- Phosphoruse6
- Outcome
- effect of soil applied Fee6
- Direction
- enhancede6
- Qualifier
- under these experimental conditionse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abstract Iron deficiency in grain sorghum (Sorghum bicolor (L.) Moench) is a major problem in many soils in the Western Great Plains”
e6“Phosphorus stimulated root growth and under these experimental conditions enhanced the effect of soil applied Fe”
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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.