Abstract
Three japonica rice varieties,Dongnong 425,Dongnong 427 and Songjing No. 6,were studied by field experiments with K2 O rates as K0( 0 kg·hm- 2),K1( 25 kg·hm- 2),K2( 50 kg·hm- 2),K3( 75 kg·hm- 2),K4( 100kg·hm- 2),K5( 125 kg·hm- 2) and K6( 150 kg·hm- 2),to explore the effect of potassium fertilizer application rates on grain filling and yield of rice with different ear grains of japonica rice in cold region. The results showed that the appropriate amount of applied potassium fertilizer was 75 ~ 100 kg·hm- 2. Variations of filling process were similar among different varieties and different among ear heights. Grain weight and seed setting rate was significantly correlated with final yield. Potash fertilizer adjusted the intensity of the filling process at different ear height. Under the condition of optimum potash fertilizer,the average difference of initial growth potential R0 between upper and the middle and lower ear grain reduced to 0. 089. In K6,the average difference of average growth rate GRmeanbetween upper and the middle and lower ear grain reduced to 0. 016g· d- 1. The appropriate amount of potash fertilizer significantly made greater contribution to the yield of different ear height grains during mid-and late filling process,balanced the yield of different ear height grains,and then improved the yield.
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Claims 11
Claim · model-written summary
The suitable potassium fertilizer rate was 75 to 100 kg per hectare.
- Taxon
- japonica rice
_by_Augustus_Binu.jpg?width=60)
Oryza sativa Japonica Groupt0 - Outcome
- appropriate amount of applied potassium fertilizere0
- Value
- 75 ~ 100 kg·hm- 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_by_Augustus_Binu.jpg?width=500)
Verbatim
t0“japonica rice”
e0“the appropriate amount of applied potassium fertilizer was 75 ~ 100 kg·hm- 2”
Claim · model-written summary
Filling processes varied similarly across varieties.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Outcome
- Variations of filling processe0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“Variations of filling process were similar among different varieties”
Claim · model-written summary
Filling processes differed among ear heights.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Organ / stage
- ear heightse0
- Outcome
- different among ear heightse0
- Direction
- differente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“different among ear heights”
Claim · model-written summary
Grain weight was significantly correlated with final yield.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Organ / stage
- Graine0
- Outcome
- final yielde0
- Qualifier
- Grain weighte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“Grain weight and seed setting rate was significantly correlated with final yield”
Claim · model-written summary
Seed setting rate was significantly correlated with final yield.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Organ / stage
- seede0
- Outcome
- final yielde0
- Qualifier
- seed setting ratee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“Grain weight and seed setting rate was significantly correlated with final yield”
Claim · model-written summary
Potash fertilizer adjusted filling intensity at different ear heights.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Organ / stage
- eare0
- Treatment
- Potash fertilizere0
- Outcome
- intensity of the filling processe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“Potash fertilizer adjusted the intensity of the filling process at different ear height”
Claim · model-written summary
At optimum potassium, the initial growth potential difference between upper and middle/lower grains fell to 0.089.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- optimum potash fertilizere0
- Outcome
- average difference of initial growth potential R0e0
- Direction
- reducede0
- Value
- 0. 089e0
- Comparator
- upper and the middle and lower ear graine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“Under the condition of optimum potash fertilizer,the average difference of initial growth potential R0 between upper and the middle and lower ear grain reduced to 0. 089”
Claim · model-written summary
At K6, the growth-rate difference between upper and middle/lower grains fell to 0.016 g per day.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- K6e0
- Outcome
- average difference of average growth rate GRmeane0
- Direction
- reducede0
- Value
- 0. 016g· d- 1e0
- Comparator
- upper and the middle and lower ear graine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“In K6,the average difference of average growth rate GRmeanbetween upper and the middle and lower ear grain reduced to 0. 016g· d- 1”
Claim · model-written summary
Appropriate potash significantly increased the contribution of mid and late grain filling to yield.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- appropriate amount of potash fertilizere0
- Outcome
- contribution to the yield of different ear height grainse0
- Direction
- greatere0
- Qualifier
- during mid-and late filling processe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“The appropriate amount of potash fertilizer significantly made greater contribution to the yield of different ear height grains during mid-and late filling process”
Claim · model-written summary
Appropriate potash balanced yield among ear heights.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- appropriate amount of potash fertilizere0
- Outcome
- yield of different ear height grainse0
- Direction
- balancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“The appropriate amount of potash fertilizer significantly made greater contribution to the yield of different ear height grains during mid-and late filling process,balanced the yield of different ear height grains”
Claim · model-written summary
Appropriate potash improved yield.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- appropriate amount of potash fertilizere0
- Outcome
- yielde0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“japonica rice”
e0“The appropriate amount of potash fertilizer significantly made greater contribution to the yield of different ear height grains during mid-and late filling process,balanced the yield of different ear height grains,and then improved the yield”
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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.