Abstract
The influence of crop residue amendments on the chemical properties of an acid soil and rice yields was investigated at Abakaliki for two cropping growing seasons (2006 and 2007). The residue treatments were rice straw, burnt rice husk and legume residue, while the rice cultivars were ITA 315, Ex-China and ITA 257. The design of the experiment was a 3 x 4 factorial in a Randomize Complete Block Design (RCBD) and replicated three times. Data were collected on soil pH, organic matter, soil total nitrogen, available P, exchangeable Ca, Mg, P and CEC and crop growth and yield. Significantly (p<0.05) higher levels of the entire soil chemical properties measured were detected on the soil treated with the different crop residue than the soil that was not treated with crop residue. There were significant differences (p<0.05) on the effect of residue sources on soil N, P, K, Ca, Mg and CEC. The soil organic matter was significantly higher on the soils treated with rice straw and legume residue than the soils treated with burnt rice husk, where as burnt rice husk significantly reduced soil acidity than the rice straw and legume residue. Rice growth was superior in were the soil was treated with crop residue than the soil without crop residue treatment. Grain yield was also significantly (p<0.05) higher when the soil was treated with crop residue than when the soil was not treated with crop residue. There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments. The highest grain yield of 3.40 t/ha in the study was recorded with ITA 315 planted on soil treated with burnt rice husk. Generally, ITA 315 and Ex-China produced significantly (p<0.05) higher grain yield than ITA 217. The superior yield of rice on residue treated soil was attributed to the improved soil chemical properties where as the superior performance and yield of ITA 315 and Ex-China were ascribed to genetic variability.
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Claims 17
Claim · model-written summary
Crop residues increased measured soil chemical properties relative to no residue.
- Taxon
- rice
Oryza sativat0 - Treatment
- crop residuee0
- Outcome
- soil chemical propertiese0
- Direction
- highere0
- Comparator
- soil that was not treated with crop residuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly (p<0.05) higher levels of the entire soil chemical properties measured were detected on the soil treated with the different crop residue than the soil that was not treated with crop residue.”
t0“rice yields”
Claim · model-written summary
Residue sources differed in soil N, P, K, Ca, Mg and CEC.
- Taxon
- riceOryza sativat0
- Outcome
- soil N, P, K, Ca, Mg and CECe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant differences (p<0.05) on the effect of residue sources on soil N, P, K, Ca, Mg and CEC.”
t0“rice yields”
Claim · model-written summary
Rice straw and legume residue produced higher soil organic matter than burnt rice husk.
- Taxon
- riceOryza sativat0
- Treatment
- rice straw and legume residuee0
- Outcome
- soil organic mattere0
- Direction
- highere0
- Comparator
- burnt rice huske0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil organic matter was significantly higher on the soils treated with rice straw and legume residue than the soils treated with burnt rice husk, where as burnt rice husk significantly reduced soil acidity than the rice straw and legume residue.”
t0“rice yields”
Claim · model-written summary
Burnt rice husk reduced soil acidity relative to rice straw and legume residue.
- Taxon
- riceOryza sativat0
- Treatment
- burnt rice huske0
- Outcome
- soil aciditye0
- Direction
- reducede0
- Comparator
- rice straw and legume residuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil organic matter was significantly higher on the soils treated with rice straw and legume residue than the soils treated with burnt rice husk, where as burnt rice husk significantly reduced soil acidity than the rice straw and legume residue.”
t0“rice yields”
Claim · model-written summary
Rice growth was superior with crop residue.
- Taxon
- riceOryza sativae0
- Treatment
- crop residuee0
- Outcome
- Rice growthe0
- Direction
- superiore0
- Comparator
- soil without crop residue treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice growth was superior in were the soil was treated with crop residue than the soil without crop residue treatment.”
Claim · model-written summary
Grain yield was higher with crop residue.
- Taxon
- riceOryza sativat0
- Treatment
- crop residuee0
- Outcome
- Grain yielde0
- Direction
- highere0
- Comparator
- soil was not treated with crop residuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was also significantly (p<0.05) higher when the soil was treated with crop residue than when the soil was not treated with crop residue.”
t0“rice yields”
Claim · model-written summary
rice straw increased ITA 315 grain yield by 1.15 t/ha against no residue.
- Taxon
- riceOryza sativae0
- Material
- ITA 315e0
- Treatment
- rice strawe0
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 1.15e0
- Comparator
- soil with no residue treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments.”
Claim · model-written summary
burnt rice husk increased ITA 315 grain yield by 1.60 t/ha against no residue.
- Taxon
- riceOryza sativae0
- Material
- ITA 315e0
- Treatment
- burnt rice huske0
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 1.60e0
- Comparator
- soil with no residue treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments.”
Claim · model-written summary
legume residue increased ITA 315 grain yield by 1.50 t/ha against no residue.
- Taxon
- riceOryza sativae0
- Material
- ITA 315e0
- Treatment
- legume residuee0
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 1.50 t/hae0
- Comparator
- soil with no residue treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments.”
Claim · model-written summary
rice straw increased Ex-China grain yield by 1.30 t/ha against no residue.
- Taxon
- riceOryza sativae0
- Material
- Ex-Chinae0
- Treatment
- rice strawe0
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 1.30e0
- Comparator
- soil with no residue treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments.”
Claim · model-written summary
burnt rice husk increased Ex-China grain yield by 1.55 t/ha against no residue.
- Taxon
- riceOryza sativae0
- Material
- Ex-Chinae0
- Treatment
- burnt rice huske0
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 1.55e0
- Comparator
- soil with no residue treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments.”
Claim · model-written summary
legume residue increased Ex-China grain yield by 1.35 t/ha against no residue.
- Taxon
- riceOryza sativae0
- Material
- Ex-Chinae0
- Treatment
- legume residuee0
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 1.35 t/hae0
- Comparator
- soil with no residue treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments.”
Claim · model-written summary
rice straw increased ITA 257 grain yield by 0.85 t/ha against no residue.
- Taxon
- riceOryza sativae0
- Material
- ITA 257e0
- Treatment
- rice strawe0
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 0.85e0
- Comparator
- soil with no residue treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments.”
Claim · model-written summary
burnt rice husk increased ITA 257 grain yield by 1.05 t/ha against no residue.
- Taxon
- riceOryza sativae0
- Material
- ITA 257e0
- Treatment
- burnt rice huske0
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 1.05e0
- Comparator
- soil with no residue treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments.”
Claim · model-written summary
legume residue increased ITA 257 grain yield by 0.90 t/ha against no residue.
- Taxon
- riceOryza sativae0
- Material
- ITA 257e0
- Treatment
- legume residuee0
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 0.90 t/hae0
- Comparator
- soil with no residue treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were average grain yield increases of 1.15, 1.60 and 1.50 t/ha for ITA 315, 1.30, 1.55 and 1.35 t/ha for Ex-China and 0.85, 1.05 and 0.90 t/ha for ITA 257 were the soil was treated with rice straw, burnt rice husk and legume residue compared to the soil with no residue treatments.”
Claim · model-written summary
The highest grain yield was 3.40 t/ha for ITA 315 on burnt rice husk.
- Taxon
- riceOryza sativat0
- Material
- ITA 315e0
- Treatment
- burnt rice huske0
- Outcome
- grain yielde0
- Direction
- higheste0
- Value
- 3.40 t/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield of 3.40 t/ha in the study was recorded with ITA 315 planted on soil treated with burnt rice husk.”
t0“rice yields”
Claim · model-written summary
ITA 315 and Ex-China yielded more than ITA 217.
- Taxon
- riceOryza sativat0
- Material
- ITA 315 and Ex-Chinae0
- Outcome
- grain yielde0
- Direction
- highere0
- Comparator
- ITA 217e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Generally, ITA 315 and Ex-China produced significantly (p<0.05) higher grain yield than ITA 217.”
t0“rice yields”
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