Abstract
In order to achieve balanced fertilization,increase yield of summer maize in the eastern plains of Henan,three field experiments was conducted to study the effects of recommended fertilization by ASI(a systematic approach for determining soil nutrient contents) on yield of summer maize and potassium fertilizer efficiency.The results showed that fertilization can significantly increase the yield of summer maize,and the increased rate is 22.6%-49.95%.Balanced fertilization(N,P2O5 and K2O) could increase grain yield significantly with a mean of 7.06% compared with famer habits fertilization.The average increase rate is 10.11% by potassium fertilizer application.But sulfur fertilizer showed no effect on yield increasing.Potassium fertilizer application could increase potassium accumulation of summer maize plant.The average recovery efficiency of applied K was 33.47%,the agronomic efficiency was 5.98kg/kg and the partial factor productivity was 61.22kg/kg.The effect was good of potassium balanced application in the eastern plains of Henan,and the peasants should apply rationally potassium fertilizer to summer maize.
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Claims 9
Claim · model-written summary
Fertilization significantly raised summer maize yield by 22.6%-49.95%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“fertilization can significantly increase the yield of summer maize,and the increased rate is 22.6%-49.95%”
t0“Summer Maize”
Claim · model-written summary
Balanced fertilization raised grain yield by a mean 7.06% relative to farmer practice.
- Treatment
- Balanced fertilization(N,P2O5 and K2O)e0
- Outcome
- grain yielde0
- Direction
- increasee0
- Value
- 7.06%e0
- Comparator
- famer habits fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Balanced fertilization(N,P2O5 and K2O) could increase grain yield significantly with a mean of 7.06% compared with famer habits fertilization”
t0“Summer Maize”
Claim · model-written summary
Potassium fertilizer application increased yield by an average 10.11%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The average increase rate is 10.11% by potassium fertilizer application”
t0“Summer Maize”
Claim · model-written summary
Sulfur fertilizer showed no yield increase.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“sulfur fertilizer showed no effect on yield increasing”
t0“Summer Maize”
Claim · model-written summary
Potassium fertilizer increased potassium accumulation in summer maize plants.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Potassium fertilizer application could increase potassium accumulation of summer maize plant”
Claim · model-written summary
Mean recovery efficiency of applied K was 33.47%.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“The average recovery efficiency of applied K was 33.47%”
t0“Summer Maize”
Claim · model-written summary
Agronomic efficiency of applied K was 5.98kg/kg.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“the agronomic efficiency was 5.98kg/kg”
t0“Summer Maize”
Claim · model-written summary
Partial factor productivity was 61.22kg/kg.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“the partial factor productivity was 61.22kg/kg”
t0“Summer Maize”
Claim · model-written summary
The authors recommend rational potassium fertilizer application to summer maize in eastern Henan.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“the peasants should apply rationally potassium fertilizer to summer maize”
e1“potassium balanced application in the eastern plains of Henan”
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