Abstract
Excessive application of nitrogen and phosphorus and lower potassium supply not only limit rice growth,but also reduce nutrient use efficiency.In this paper,a field experiment was conducted to study the effects of reducing nitrogen and phosphorus dosages and stabilizing potassium supply on rice yield,nutrient accumulation and fertilizer use efficiency.There were fourteen treatments with two replications.The results indicate that the straw biomass and grain yields of the treatments with integrated N-K,P-K,or N-P-K applications are significantly(P0.05) higher than those of the no fertilizer treatment.The straw biomass of the treatment with less nitrogen and phosphorus and more potassium application(T11,modified treatment,N 225 kg/ha,P2O5 60 kg/ha and K2O 90 kg/ha) is significantly(P0.05) higher than that of the conventional fertilization treatment(CFA,N 300 kg/ha,P2O5 150 kg/ha,K2O 60 kg/ha) and the differences of kernel weight and grain yield between the two treatments are obvious.The nitrogen and potassium contents in shoots at the tillering stage and in straw at the harvest stage,the accumulated nitrogen and potassium amounts in above ground organs at the harvest stage,as well as apparent nitrogen and phosphorus use efficiencies of the modified treatment are significantly(P0.05) higher than those of CFA.These results imply that properly reducing nitrogen and phosphorus dosages,and increasing potassium dosages could catch nitrogen and potassium need of rice plants,increase dry matter accumulation and grain yield,and improve apparent nitrogen and phosphorus use efficiencies.The fertilization scheme of N 196.2 kg/ha,P2O5 46.5 kg/ha and K2O 90 kg/ha should be recommended for practical rice production under local conditions.
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Claims 10
Claim · model-written summary
Integrated N-K, P-K, or N-P-K fertilization increased straw biomass relative to no fertilizer.
- Taxon
- rice
Oryza sativat0 - Treatment
- integrated N-K,P-K,or N-P-K applicationse0
- Outcome
- straw biomasse0
- Direction
- highere0
- Comparator
- no fertilizer treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“straw biomass and grain yields of the treatments with integrated N-K,P-K,or N-P-K applications are significantly(P0.05) higher than those of the no fertilizer treatment”
t0“rice”
Claim · model-written summary
Integrated N-K, P-K, or N-P-K fertilization increased grain yield relative to no fertilizer.
- Taxon
- riceOryza sativat0
- Treatment
- integrated N-K,P-K,or N-P-K applicationse0
- Outcome
- grain yieldse0
- Direction
- highere0
- Comparator
- no fertilizer treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“straw biomass and grain yields of the treatments with integrated N-K,P-K,or N-P-K applications are significantly(P0.05) higher than those of the no fertilizer treatment”
t0“rice”
Claim · model-written summary
Modified fertilizer treatment T11 increased straw biomass relative to conventional fertilization.
- Taxon
- riceOryza sativat0
- Treatment
- less nitrogen and phosphorus and more potassium applicatione0
- Outcome
- straw biomasse0
- Direction
- highere0
- Comparator
- conventional fertilization treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“straw biomass of the treatment with less nitrogen and phosphorus and more potassium application(T11,modified treatment,N 225 kg/ha,P2O5 60 kg/ha and K2O 90 kg/ha) is significantly(P0.05) higher than that of the conventional fertilization treatment(CFA,N 300 kg/ha,P2O5 150 kg/ha,K2O 60 kg/ha)”
t0“rice”
Claim · model-written summary
Kernel weight differed between modified and conventional fertilization treatments.
- Taxon
- riceOryza sativat0
- Treatment
- modified treatmente1
- Outcome
- kernel weighte0
- Comparator
- conventional fertilization treatmente2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“differences of kernel weight and grain yield between the two treatments are obvious”
e1“modified treatment,N 225 kg/ha,P2O5 60 kg/ha and K2O 90 kg/ha”
e2“conventional fertilization treatment(CFA,N 300 kg/ha,P2O5 150 kg/ha,K2O 60 kg/ha)”
t0“rice”
Claim · model-written summary
Grain yield differed between modified and conventional fertilization treatments.
- Taxon
- riceOryza sativat0
- Treatment
- modified treatmente1
- Outcome
- grain yielde0
- Comparator
- conventional fertilization treatmente2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“differences of kernel weight and grain yield between the two treatments are obvious”
e1“modified treatment,N 225 kg/ha,P2O5 60 kg/ha and K2O 90 kg/ha”
e2“conventional fertilization treatment(CFA,N 300 kg/ha,P2O5 150 kg/ha,K2O 60 kg/ha)”
t0“rice”
Claim · model-written summary
Modified fertilization increased shoot nitrogen and potassium contents at tillering compared with CFA.
- Taxon
- riceOryza sativat0
- Organ / stage
- tillering stagee0
- Treatment
- modified treatmente0
- Outcome
- nitrogen and potassium contents in shootse0
- Direction
- highere0
- Comparator
- CFAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen and potassium contents in shoots at the tillering stage and in straw at the harvest stage,the accumulated nitrogen and potassium amounts in above ground organs at the harvest stage,as well as apparent nitrogen and phosphorus use efficiencies of the modified treatment are significantly(P0.05) higher than those of CFA”
t0“rice”
Claim · model-written summary
Modified fertilization increased straw nitrogen and potassium contents at harvest compared with CFA.
- Taxon
- riceOryza sativat0
- Organ / stage
- straw at the harvest stagee0
- Treatment
- modified treatmente0
- Outcome
- nitrogen and potassium contentse0
- Direction
- highere0
- Comparator
- CFAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen and potassium contents in shoots at the tillering stage and in straw at the harvest stage,the accumulated nitrogen and potassium amounts in above ground organs at the harvest stage,as well as apparent nitrogen and phosphorus use efficiencies of the modified treatment are significantly(P0.05) higher than those of CFA”
t0“rice”
Claim · model-written summary
Modified fertilization increased aboveground nitrogen and potassium accumulation at harvest compared with CFA.
- Taxon
- riceOryza sativat0
- Organ / stage
- above ground organs at the harvest stagee0
- Treatment
- modified treatmente0
- Outcome
- accumulated nitrogen and potassium amountse0
- Direction
- highere0
- Comparator
- CFAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the accumulated nitrogen and potassium amounts in above ground organs at the harvest stage,as well as apparent nitrogen and phosphorus use efficiencies of the modified treatment are significantly(P0.05) higher than those of CFA”
t0“rice”
Claim · model-written summary
Modified fertilization increased apparent nitrogen and phosphorus use efficiencies compared with CFA.
- Taxon
- riceOryza sativat0
- Treatment
- modified treatmente0
- Outcome
- apparent nitrogen and phosphorus use efficienciese0
- Direction
- highere0
- Comparator
- CFAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“apparent nitrogen and phosphorus use efficiencies of the modified treatment are significantly(P0.05) higher than those of CFA”
t0“rice”
Claim · model-written summary
The authors recommend N 196.2 kg/ha, P2O5 46.5 kg/ha and K2O 90 kg/ha for local rice production.
- Taxon
- riceOryza sativae0
- Treatment
- N 196.2 kg/ha,P2O5 46.5 kg/ha and K2O 90 kg/hae0
- Outcome
- fertilization schemee0
- Qualifier
- under local conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fertilization scheme of N 196.2 kg/ha,P2O5 46.5 kg/ha and K2O 90 kg/ha should be recommended for practical rice production under local conditions”
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See all 511 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.