Abstract
We analyzed data from a long-term rice–wheat cropping sequence to evaluate the effects of integrated nutrient management (INM) on yield trends and sustainability, nutrient balance and soil fertility of the system. After 30th cycle, grain yield of both the crops significantly declined under control and highest rice and wheat grain yields were obtained when 50% N supplied through green manure and farm yard manure, respectively. The magnitude of yield slope under INM was found considerably higher than 100% recommended fertilizer (RDF). Sustainable yield index (SYI) for both the crops were found lower in control but considerably higher with the 100% RDF and under INM. The soils under all the treatments suffered an apparent loss of K and N (except where organics replacing 50% N). Correlation study also reveals K is the sole factor for the yield sustainability as apparent K balance was negatively correlated with SYI and yield slope.
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Claims 8
Claim · model-written summary
Grain yield of both crops significantly declined under the control treatment.
Verbatim
e1“After 30th cycle, grain yield of both the crops significantly declined under control”
t0“long-term (30 years) rice-wheat system”
Claim · model-written summary
Highest rice grain yield was obtained with 50% N supplied through green manure.
- Taxon
- rice
Oryza sativae2 - Treatment
- 50% N supplied through green manuree2
- Outcome
- grain yieldse2
- Direction
- higheste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“highest rice and wheat grain yields were obtained when 50% N supplied through green manure and farm yard manure, respectively”
Claim · model-written summary
Highest wheat grain yield was obtained with 50% N supplied through farm yard manure.
- Taxon
- wheat
Triticum aestivume2 - Treatment
- farm yard manuree2
- Outcome
- grain yieldse2
- Direction
- higheste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“highest rice and wheat grain yields were obtained when 50% N supplied through green manure and farm yard manure, respectively”
Claim · model-written summary
The yield slope under INM was considerably higher than under 100% recommended fertilizer.
Verbatim
e3“The magnitude of yield slope under INM was found considerably higher than 100% recommended fertilizer (RDF)”
t0“long-term (30 years) rice-wheat system”
Claim · model-written summary
The sustainable yield index was lower in the control than under other treatments.
Verbatim
e4“Sustainable yield index (SYI) for both the crops were found lower in control but considerably higher with the 100% RDF and under INM”
t0“long-term (30 years) rice-wheat system”
Claim · model-written summary
The sustainable yield index was considerably higher with 100% RDF and under INM than in the control.
Verbatim
e4“Sustainable yield index (SYI) for both the crops were found lower in control but considerably higher with the 100% RDF and under INM”
t0“long-term (30 years) rice-wheat system”
Claim · model-written summary
Soils under all treatments suffered an apparent loss of K and N, except where organics replaced 50% N.
Verbatim
e5“The soils under all the treatments suffered an apparent loss of K and N (except where organics replacing 50% N)”
t0“long-term (30 years) rice-wheat system”
Claim · model-written summary
Apparent K balance was negatively correlated with SYI and yield slope; K is the sole factor for yield sustainability.
Verbatim
e6“Correlation study also reveals K is the sole factor for the yield sustainability as apparent K balance was negatively correlated with SYI and yield slope”
t0“long-term (30 years) rice-wheat system”
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