Abstract
【Objective】 Continuous no-tillage effects on crop yield and soil fertility in double rice cropping system were studied in order to provide valuable references to technique selection of soil management and rice cast-transplantation for this cropping system in South China. 【Method】 No-tillage with cast-transplanting has been conducted in paddy field with double rice cropping system since 2005 in Nanchang city, Jiangxi Province. Crop yield and soil fertility indexes, such as density, porosity, water retention property, nutrient, microbe and enzymes activities were simultaneously determined in this study.【Result】 The early and later rice grain yield were 2.70% and 1.87% higher than that under conventional tillage, respectively, under no-tillage treatment of one and two years (four crops), but crop yield in different treatments was not different significantly. As the time of no-tillageprolonged,early and later rice grain yield decreased, particularly no-tillage of five years decreased by 9.16% and 12.56%. The no-tillage treatment of one year (two crops) improved soil physical properties, but as the time of no-tillage prolonged, worsened soil physical properties, the density was 1.68%-8.01% higher than that under conventional tillage,and the porosity decreased by 0.69%-4.48%,and non-capillary porosity decreased by 15.42%-37.92%. The no-tillage treatment helped nutrient enrichment in the surface soil layer, but decreased soil water retention property. Soil analysis showed that the no-tillage field was less than the control, plowed field in total amount of three groups of soil microbes. However, in no-tillage field, the amount of soil bacteria increased, while that of soil actinomyces and fungi decreased, and urease activity in surface layer soil increased. Significant positive correlations were observed in soil organic matter and total N with urease, catalase and polyphenol oxidase activity. Significant positive correlations of soil total N and available K with peroxidase activity were also obsearved. 【Conclusion】 In comparison to conventional tillage, crop yield in no-tillage treatment of one and two years (four crops) was not differ significantly, no-tillage treatment of one year improved soil physical properties, but as the time of no-tillage prolonged, worsened soil physical properties, early and late rice grain yield decreased. The no-tillage treatment helped nutrient enrichment in the surface soil layer, but decreased soil water-retention property. In no-tillage field, the amount of soil bacteria increased, while that of soil actinomyces and fungi decreased, and urease activity in surface layer soil increased.
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Claims 17
Claim · model-written summary
Early rice grain yield was 2.70% higher under one to two years of no-tillage than conventional tillage.
- Taxon
- rice
Oryza sativae0 - Treatment
- no-tillage treatment of one and two years (four crops)e0
- Outcome
- early and later rice grain yielde0
- Direction
- highere0
- Value
- 2.70%e0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The early and later rice grain yield were 2.70% and 1.87% higher than that under conventional tillage, respectively, under no-tillage treatment of one and two years (four crops)”
Claim · model-written summary
Later rice grain yield was 1.87% higher under one to two years of no-tillage than conventional tillage.
- Taxon
- riceOryza sativae0
- Treatment
- no-tillage treatment of one and two years (four crops)e0
- Outcome
- later rice grain yielde0
- Direction
- highere0
- Value
- 1.87%e0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The early and later rice grain yield were 2.70% and 1.87% higher than that under conventional tillage, respectively, under no-tillage treatment of one and two years (four crops)”
Claim · model-written summary
Five years of no-tillage decreased early rice grain yield by 9.16%.
- Taxon
- riceOryza sativae0
- Treatment
- no-tillage of five yearse0
- Outcome
- early and later rice grain yielde0
- Direction
- decreasede0
- Value
- 9.16%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early and later rice grain yield decreased, particularly no-tillage of five years decreased by 9.16% and 12.56%”
Claim · model-written summary
Five years of no-tillage decreased later rice grain yield by 12.56%.
- Taxon
- riceOryza sativae0
- Treatment
- no-tillage of five yearse0
- Outcome
- later rice grain yielde0
- Direction
- decreasede0
- Value
- 12.56%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early and later rice grain yield decreased, particularly no-tillage of five years decreased by 9.16% and 12.56%”
Claim · model-written summary
One year of no-tillage improved paddy soil physical properties.
- Taxon
- RiceOryza sativat0
- Treatment
- no-tillage treatment of one year (two crops)e0
- Outcome
- soil physical propertiese0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The no-tillage treatment of one year (two crops) improved soil physical properties”
t0“Rice Cropping System”
Claim · model-written summary
Longer no-tillage worsened paddy soil physical properties.
- Taxon
- RiceOryza sativat0
- Treatment
- no-tillagee0
- Outcome
- soil physical propertiese0
- Direction
- worsenede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The no-tillage treatment of one year (two crops) improved soil physical properties, but as the time of no-tillage prolonged, worsened soil physical properties”
t0“Rice Cropping System”
Claim · model-written summary
No-tillage increased soil density by 1.68%-8.01% over conventional tillage.
- Taxon
- RiceOryza sativat0
- Treatment
- no-tillagee1
- Outcome
- densitye0
- Direction
- highere0
- Value
- 1.68%-8.01%e0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the density was 1.68%-8.01% higher than that under conventional tillage”
t0“Rice Cropping System”
e1“The no-tillage treatment of one year (two crops)”
Claim · model-written summary
No-tillage decreased soil porosity by 0.69%-4.48%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the porosity decreased by 0.69%-4.48%”
t0“Rice Cropping System”
e1“The no-tillage treatment of one year (two crops)”
Claim · model-written summary
No-tillage decreased non-capillary porosity by 15.42%-37.92%.
- Taxon
- RiceOryza sativat0
- Treatment
- no-tillagee1
- Outcome
- non-capillary porositye0
- Direction
- decreasede0
- Value
- 15.42%-37.92%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“non-capillary porosity decreased by 15.42%-37.92%”
t0“Rice Cropping System”
e1“The no-tillage treatment of one year (two crops)”
Claim · model-written summary
No-tillage enriched nutrients in surface soil.
- Taxon
- RiceOryza sativat0
- Treatment
- no-tillage treatmente0
- Outcome
- nutrient enrichment in the surface soil layere0
- Direction
- enrichmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The no-tillage treatment helped nutrient enrichment in the surface soil layer, but decreased soil water retention property.”
t0“Rice Cropping System”
Claim · model-written summary
No-tillage decreased soil water retention.
- Taxon
- RiceOryza sativat0
- Treatment
- No-Tillaget1
- Outcome
- soil water retention propertye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased soil water retention property”
t0“Rice Cropping System”
t1“Continuous No-Tillage”
Claim · model-written summary
The total amount of three soil microbial groups was lower in no-tillage than plowed fields.
- Taxon
- RiceOryza sativat0
- Treatment
- no-tillage fielde0
- Outcome
- total amount of three groups of soil microbese0
- Direction
- less thane0
- Comparator
- control, plowed fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the no-tillage field was less than the control, plowed field in total amount of three groups of soil microbes”
t0“Rice Cropping System”
Claim · model-written summary
Soil bacteria increased in no-tillage fields.
- Taxon
- RiceOryza sativat0
- Treatment
- no-tillage fielde0
- Outcome
- amount of soil bacteriae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In no-tillage field, the amount of soil bacteria increased”
t0“Rice Cropping System”
Claim · model-written summary
Soil actinomyces and fungi decreased in no-tillage fields.
- Taxon
- RiceOryza sativat0
- Treatment
- No-Tillaget1
- Outcome
- soil actinomyces and fungie0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, in no-tillage field, the amount of soil bacteria increased, while that of soil actinomyces and fungi decreased”
t0“Rice Cropping System”
t1“Continuous No-Tillage”
Claim · model-written summary
Surface soil urease activity increased in no-tillage fields.
- Taxon
- RiceOryza sativat0
- Treatment
- No-Tillaget1
- Outcome
- urease activity in surface layer soile0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, in no-tillage field, the amount of soil bacteria increased, while that of soil actinomyces and fungi decreased, and urease activity in surface layer soil increased.”
t0“Rice Cropping System”
t1“Continuous No-Tillage”
Claim · model-written summary
Soil organic matter and total N correlated positively with urease, catalase and polyphenol oxidase activity.
- Taxon
- RiceOryza sativat0
- Compound
- total Ne0
- Outcome
- urease, catalase and polyphenol oxidase activitye0
- Direction
- positive correlationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant positive correlations were observed in soil organic matter and total N with urease, catalase and polyphenol oxidase activity”
t0“Rice Cropping System”
Claim · model-written summary
Soil total N and available K correlated positively with peroxidase activity.
- Taxon
- RiceOryza sativat0
- Compound
- total Ne0
- Outcome
- peroxidase activitye0
- Direction
- positive correlationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant positive correlations of soil total N and available K with peroxidase activity”
t0“Rice Cropping System”
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