Abstract
To study the interaction effects of Fe and Mn in Si-treated and untreated soils, we conducted an experiment in the glass house of the Department of Soil Science and Water Management, H. P. Agricultural University, Palampur, India, with paddy (RT-42) as a test crop. We applied manganese as MnSO4·7H2O at rates of 0, 25, and 50 mg kg−1 and Fe as FeSO4·2H2O at rates of 0, 25, and 50 mg kg−1. Silicon was added as Na2SiO3·5H2O at rates of 0 and 200 mg kg−1. Applied Mn, 25 mg kg−1, increased the grain and straw yield over control and 50 mg kg−1 Mn decreased the yields over 25 mg kg−1 Mn, when soil was not treated with Si. When soil was treated with Si, 50 mg kg−1 added Mn did not produce any effect on paddy yield. When Fe was applied, however, 50 mg kg−1 Mn in Si-treated soil increased the paddy yield even over 25 mg kg−1 Mn. In Si-untreated soil, this level of Mn did not show any effect on yield. The grain and straw yields were higher with Si-treated soil than with Si-untreated soil. The concentration and uptake of Fe and Mn decreased with the application of Mn and Fe, respectively. The conentration of Fe and Mn and the uptake of Fe in the paddy were higher with Si-untreated soil than with Si-treated soil. The uptake of Mn was not affeted by Si additions. When more Fe and Mn were applied, the respective retention of Fe and Mn by root was decreased and their translocation to shoot was increased. When more Mn or Si was added, however, more Fe was retained by root and less was translocated to shoot; when more Fe or Si was added, more Mn was retained by root and less was translocated to shoot. The respective absorption of Mn and Fe in paddy was 0.85 and 0.51 mg pot−1 up to tillering, 7.27 and 4.85 mg pot−1 between tillering and flowering, and 4.20 and 2.52 mg pot−1 between flowering and maturity. At maturity, 9.65 and 5.82 mg pot−1 of Mn and Fe taken up were retained by straw and 2.77 and 1.76 mg pot−1 were translocated to grain. The distribution of Mn in grain and straw increased with applied Mn and decreased with applied Fe. When more Si was added, more Mn was translocated to grain and less was retained by straw. When more Mn or Si was applied, however, less Fe was translocated to grain; when more Fe was applied, more Fe was translocated to grain.
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Claims 20
Claim · model-written summary
In untreated soil, 25 mg kg−1 Mn increased grain and straw yield over control.
Verbatim
e0“Applied Mn, 25 mg kg−1, increased the grain and straw yield over control”
t0“PADDY”
Claim · model-written summary
Without Si, 50 mg kg−1 Mn decreased yield relative to 25 mg kg−1 Mn.
Verbatim
e0“50 mg kg−1 Mn decreased the yields over 25 mg kg−1 Mn, when soil was not treated with Si.”
t0“PADDY”
Claim · model-written summary
In Si-treated soil, 50 mg kg−1 Mn had no effect on paddy yield.
Not reportedComparator
Verbatim
e0“When soil was treated with Si, 50 mg kg−1 added Mn did not produce any effect on paddy yield.”
Claim · model-written summary
With Fe in Si-treated soil, 50 mg kg−1 Mn increased paddy yield over 25 mg kg−1 Mn.
Verbatim
e0“When Fe was applied, however, 50 mg kg−1 Mn in Si-treated soil increased the paddy yield even over 25 mg kg−1 Mn.”
Claim · model-written summary
In Si-untreated soil, 50 mg kg−1 Mn had no yield effect.
Not reportedComparator
Verbatim
e0“In Si-untreated soil, this level of Mn did not show any effect on yield.”
t0“PADDY”
Claim · model-written summary
Grain and straw yields were higher with Si-treated soil than Si-untreated soil.
Verbatim
e0“The grain and straw yields were higher with Si-treated soil than with Si-untreated soil.”
t0“PADDY”
Claim · model-written summary
Mn application decreased Fe concentration and uptake.
Not reportedComparator
Verbatim
e0“The concentration and uptake of Fe and Mn decreased with the application of Mn and Fe, respectively.”
t0“PADDY”
Claim · model-written summary
Fe application decreased Mn concentration and uptake.
Not reportedComparator
Verbatim
e0“The concentration and uptake of Fe and Mn decreased with the application of Mn and Fe, respectively.”
t0“PADDY”
Claim · model-written summary
Fe and Mn concentrations and Fe uptake were higher without Si treatment.
Verbatim
e0“The conentration of Fe and Mn and the uptake of Fe in the paddy were higher with Si-untreated soil than with Si-treated soil.”
Claim · model-written summary
Si addition did not affect Mn uptake.
Not reportedComparator
Verbatim
e0“The uptake of Mn was not affeted by Si additions.”
t0“PADDY”
Claim · model-written summary
More Fe and Mn decreased retention of the respective element in roots and increased translocation to shoots.
Verbatim
e0“When more Fe and Mn were applied, the respective retention of Fe and Mn by root was decreased and their translocation to shoot was increased.”
t0“PADDY”
Claim · model-written summary
More Fe and Mn increased translocation of their respective elements to shoots.
Verbatim
e0“When more Fe and Mn were applied, the respective retention of Fe and Mn by root was decreased and their translocation to shoot was increased.”
t0“PADDY”
Claim · model-written summary
More Mn or Si increased Fe retention by roots and decreased Fe translocation to shoots.
Verbatim
e0“when more Mn or Si was added, however, more Fe was retained by root and less was translocated to shoot”
t0“PADDY”
Claim · model-written summary
More Fe or Si increased Mn retention by roots and decreased its translocation to shoots.
Verbatim
e0“when more Fe or Si was added, more Mn was retained by root and less was translocated to shoot.”
t0“PADDY”
Claim · model-written summary
Mn and Fe absorption was 0.85 and 0.51 mg pot−1 up to tillering.
Verbatim
e0“The respective absorption of Mn and Fe in paddy was 0.85 and 0.51 mg pot−1 up to tillering”
Claim · model-written summary
Mn and Fe absorption was 7.27 and 4.85 mg pot−1 between tillering and flowering.
Verbatim
e0“7.27 and 4.85 mg pot−1 between tillering and flowering”
t0“PADDY”
e1“The respective absorption of Mn and Fe in paddy was 0.85 and 0.51 mg pot−1 up to tillering”
Claim · model-written summary
Mn and Fe absorption was 4.20 and 2.52 mg pot−1 between flowering and maturity.
Verbatim
e0“4.20 and 2.52 mg pot−1 between flowering and maturity”
t0“PADDY”
e1“The respective absorption of Mn and Fe in paddy was 0.85 and 0.51 mg pot−1 up to tillering”
Claim · model-written summary
At maturity, 9.65 and 5.82 mg pot−1 Mn and Fe were retained in straw; 2.77 and 1.76 mg pot−1 reached grain.
Verbatim
e0“At maturity, 9.65 and 5.82 mg pot−1 of Mn and Fe taken up were retained by straw and 2.77 and 1.76 mg pot−1 were translocated to grain.”
t0“PADDY”
Claim · model-written summary
Mn distribution in grain and straw increased with Mn application and decreased with Fe application.
Verbatim
e0“The distribution of Mn in grain and straw increased with applied Mn and decreased with applied Fe.”
t0“PADDY”
Claim · model-written summary
More Si increased Mn translocation to grain and decreased retention in straw.
Verbatim
e0“When more Si was added, more Mn was translocated to grain and less was retained by straw.”
t0“PADDY”
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