Abstract
Incredible accomplishments have been achieved in agricultural production in China, but many demanding challenges for ensuring food security and environmental sustainability remain. Field experiments were conducted from 2011-2013 at three different sites, including Honghu, Shayang, and Jingzhou in China, to determine the effects of fertilization on enhancing crop productivity and indigenous nutrient-supplying capacity (INuS) in a rice (Oryza sativa L.)-rapeseed (Brassica napus L.) rotation. Four mineral fertilizer treatments (NPK, NP, NK and PK) were applied in a randomized complete block design with three replicates. Crop yields were increased by 19-41% (rice) and 61-76% (rapeseed) during the two years of rice-rapeseed rotation under NPK fertilization compared to PK fertilization across the study sites. Yield responses to fertilization were ranked NPK > NP > NK > PK, illustrating that N deficiency was the most limiting condition in a rice-rapeseed rotation, followed by P and K deficiencies. The highest and lowest N, P and K accumulations were observed under NPK and PK fertilization, respectively. The INuS of the soil decreased to a significant extent and affected rice-rapeseed rotation productivity at each site under NP, NK, and PK fertilization when compared to NPK. Based on the study results, a balanced nutrient application using NPK fertilization is a key management strategy for enhancing rice-rapeseed productivity and environmental safety.
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Claims 8
Claim · model-written summary
NPK increased rice yield 19-41% over PK across sites.
- Taxon
- rice
Oryza sativae0 - Treatment
- NPK fertilizatione0
- Outcome
- Crop yieldse0
- Direction
- increasede0
- Value
- 19-41%e0
- Qualifier
- across the study sitese0
- Comparator
- PK fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crop yields were increased by 19-41% (rice) and 61-76% (rapeseed) during the two years of rice-rapeseed rotation under NPK fertilization compared to PK fertilization across the study sites.”
Claim · model-written summary
NPK increased rapeseed yield 61-76% over PK across sites.
Verbatim
e0“Crop yields were increased by 19-41% (rice) and 61-76% (rapeseed) during the two years of rice-rapeseed rotation under NPK fertilization compared to PK fertilization across the study sites.”
Claim · model-written summary
Yield response ranked NPK above NP, NK and PK, indicating nitrogen was the most limiting nutrient, then phosphorus and potassium.
Verbatim
e0“Yield responses to fertilization were ranked NPK > NP > NK > PK, illustrating that N deficiency was the most limiting condition in a rice-rapeseed rotation, followed by P and K deficiencies.”
Claim · model-written summary
NPK produced the highest nitrogen, phosphorus and potassium accumulation.
Verbatim
e0“The highest and lowest N, P and K accumulations were observed under NPK and PK fertilization, respectively.”
t0“rice-oilseed rape”
Claim · model-written summary
PK produced the lowest nitrogen, phosphorus and potassium accumulation.
Verbatim
e0“The highest and lowest N, P and K accumulations were observed under NPK and PK fertilization, respectively.”
t0“rice-oilseed rape”
Claim · model-written summary
Soil indigenous nutrient supply decreased significantly under NP, NK and PK versus NPK.
Verbatim
e0“The INuS of the soil decreased to a significant extent and affected rice-rapeseed rotation productivity at each site under NP, NK, and PK fertilization when compared to NPK.”
Claim · model-written summary
Lower soil nutrient supply under NP, NK and PK affected rotation productivity.
- Taxon
- rice-rapeseede0
- Treatment
- NP, NK, and PK fertilizatione0
- Outcome
- rice-rapeseed rotation productivitye0
Not reportedDirection
Verbatim
e0“The INuS of the soil decreased to a significant extent and affected rice-rapeseed rotation productivity at each site under NP, NK, and PK fertilization when compared to NPK.”
Claim · model-written summary
The authors recommend balanced NPK fertilization for productivity and environmental safety.
Verbatim
e0“a balanced nutrient application using NPK fertilization is a key management strategy for enhancing rice-rapeseed productivity and environmental safety.”
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See all 3,455 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.