Abstract
Abstract Field experiments were conducted in rice-wheat rotation under conventional management to determine the effects of straw return ((half straw return, HS) and (total straw return, TS)) on crop yield, N uptake, soil properties and soil NO 3 − –N leaching. We found that straw return significantly increased crop yield and N uptake. TS significantly increased soil SOM at depths of 20 cm and 30 cm. Straw return had significantly increased soil NO 3 − –N leaching at a depth of 10 cm, whereas significantly decreased soil NO 3 − –N leaching at depths of 30 cm and 90 cm in the rice season. In wheat season, HS and TS performed better than conventional fertilization management without straw return in reducing soil NO 3 − –N leaching at depth of 90 cm. Soil NO 3 − –N leaching was significantly decreased through enhancing total N uptake, improving soil aggregation and decreasing soil NO 3 − –N concentration. Our results indicated that total straw return has the potential to increase crop yield, improve soil aggregation and decrease soil NO 3 − –N concentration, thus increasing total N uptake and reducing soil NO 3 − –N leaching in the rice-wheat rotation system of Ningxia Yellow river irrigation district. In the future, the long-term observation of crop yield and nitrate nitrogen leaching are necessary to identify the environmentally friendly straw return practices for rice-wheat rotation.
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Claims 12
Claim · model-written summary
Straw return significantly increased crop yield.
Not reportedComparator
Verbatim
e0“straw return significantly increased crop yield and N uptake”
t0“rice-wheat rotation”
Claim · model-written summary
Straw return significantly increased nitrogen uptake.
Not reportedComparator
Verbatim
e0“straw return significantly increased crop yield and N uptake”
t0“rice-wheat rotation”
Claim · model-written summary
Total straw return significantly increased soil organic matter at 20 cm.
Not reportedComparator
Verbatim
e0“TS significantly increased soil SOM at depths of 20 cm and 30 cm”
t0“rice-wheat rotation”
Claim · model-written summary
Total straw return significantly increased soil organic matter at 30 cm.
Not reportedComparator
Verbatim
e0“TS significantly increased soil SOM at depths of 20 cm and 30 cm”
t0“rice-wheat rotation”
Claim · model-written summary
Straw return significantly increased soil nitrate nitrogen leaching at 10 cm.
- Taxon
- rice-wheatt0
- Treatment
- Straw returne0
- Outcome
- soil NO 3 − –N leachinge0
- Direction
- increasede0
- Qualifier
- 10 cme0
Not reportedComparator
Verbatim
e0“Straw return had significantly increased soil NO 3 − –N leaching at a depth of 10 cm”
t0“rice-wheat rotation”
Claim · model-written summary
Straw return significantly decreased soil nitrate nitrogen leaching at 30 cm in rice season.
Not reportedTreatmentComparator
Verbatim
e0“significantly decreased soil NO 3 − –N leaching at depths of 30 cm and 90 cm in the rice season”
t0“rice-wheat rotation”
Claim · model-written summary
Straw return significantly decreased soil nitrate nitrogen leaching at 90 cm in rice season.
- Taxon
- rice-wheatt0
- Outcome
- soil NO 3 − –N leachinge0
- Direction
- decreasede0
- Qualifier
- 90 cm in the rice seasone0
Not reportedTreatmentComparator
Verbatim
e0“significantly decreased soil NO 3 − –N leaching at depths of 30 cm and 90 cm in the rice season”
t0“rice-wheat rotation”
Claim · model-written summary
Half straw return reduced nitrate nitrogen leaching at 90 cm in wheat season more than conventional fertilization without straw return.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- HSe0
- Outcome
- soil NO 3 − –N leachinge0
- Direction
- reducinge0
- Qualifier
- 90 cme0
- Comparator
- conventional fertilization management without straw returne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In wheat season, HS and TS performed better than conventional fertilization management without straw return in reducing soil NO 3 − –N leaching at depth of 90 cm”
Claim · model-written summary
Total straw return reduced nitrate nitrogen leaching at 90 cm in wheat season more than conventional fertilization without straw return.
- Taxon
- wheatTriticum aestivume0
- Treatment
- TSe0
- Outcome
- soil NO 3 − –N leachinge0
- Direction
- reducinge0
- Qualifier
- 90 cme0
- Comparator
- conventional fertilization management without straw returne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In wheat season, HS and TS performed better than conventional fertilization management without straw return in reducing soil NO 3 − –N leaching at depth of 90 cm”
Claim · model-written summary
Reduced leaching was attributed to greater total nitrogen uptake, better soil aggregation and less soil nitrate nitrogen.
Verbatim
e0“Soil NO 3 − –N leaching was significantly decreased through enhancing total N uptake, improving soil aggregation and decreasing soil NO 3 − –N concentration”
t0“rice-wheat rotation”
Claim · model-written summary
Total straw return improved soil aggregation.
Not reportedComparator
Verbatim
e0“total straw return has the potential to increase crop yield, improve soil aggregation and decrease soil NO 3 − –N concentration”
t0“rice-wheat rotation”
Claim · model-written summary
Total straw return decreased soil nitrate nitrogen concentration.
- Taxon
- rice-wheatt0
- Treatment
- total straw returne0
- Outcome
- soil NO 3 − –N concentratione0
- Direction
- decreasee0
Not reportedComparator
Verbatim
e0“total straw return has the potential to increase crop yield, improve soil aggregation and decrease soil NO 3 − –N concentration”
t0“rice-wheat rotation”