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8/10/2019 Application and Analysis of Rice-growth model for organic rice fert mgt
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IntroductionResearch Method
Results and analysisDiscussion
The application and analysis of rice-growth modelfor organic rice fertilization management (2008)
Yun-Guan Xi, Pei Qin, Gong-Hui Ding, Wui-Mei Fan, Cai-MingHan
4 September 2013
Yun-Guan XI et al. Application of rice-growth model for fertilization
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IntroductionResearch Method
Results and analysisDiscussion
Chinese Eco-Agriculture
Aims at coordination between rural economic growth and
eco-environmental protection, exploitation and protection ofnatural resources
Yun-Guan XI et al. Application of rice-growth model for fertilization
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8/10/2019 Application and Analysis of Rice-growth model for organic rice fert mgt
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8/10/2019 Application and Analysis of Rice-growth model for organic rice fert mgt
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8/10/2019 Application and Analysis of Rice-growth model for organic rice fert mgt
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Introduction
8/10/2019 Application and Analysis of Rice-growth model for organic rice fert mgt
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IntroductionResearch Method
Results and analysisDiscussion
Organic Rice Growing
In China, rice is one of the main organically grown crops
The rational amount of organic fertilizer for organic rice
growing is the key technique and common question faced byfarmers
Too little input cannot meet nutrient requirement, but toomuch input will affect rice growth, pest/disease occurrence,
yield and production cost, and trigger agricultural non-pointpollution
Yun-Guan XI et al. Application of rice-growth model for fertilization
Introduction
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IntroductionResearch Method
Results and analysisDiscussion
Research Method
Rice Cultivation Computer Simulated Optimal Decision makingSystem (RCSODS)
established by Gao et al., 1992
Yun-Guan XI et al. Application of rice-growth model for fertilization
Introduction
http://find/http://goback/8/10/2019 Application and Analysis of Rice-growth model for organic rice fert mgt
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IntroductionResearch Method
Results and analysisDiscussion
Research Method
Rice Cultivation Computer Simulated Optimal Decision makingSystem (RCSODS)
established by Gao et al., 1992model especially designed for rice fertilization, so it is chosento calculate fertilization rate for organic rice growth andpredict yield
Yun-Guan XI et al. Application of rice-growth model for fertilization
Introduction
http://find/http://goback/8/10/2019 Application and Analysis of Rice-growth model for organic rice fert mgt
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IntroductionResearch Method
Results and analysisDiscussion
Research Method
Rice Cultivation Computer Simulated Optimal Decision makingSystem (RCSODS)
established by Gao et al., 1992model especially designed for rice fertilization, so it is chosento calculate fertilization rate for organic rice growth andpredict yield
field verification of organic rice growing in Shanghai YuejinFarm of Chongming Island
Yun-Guan XI et al. Application of rice-growth model for fertilization
Introduction
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Research MethodResults and analysis
Discussion
To decide the optimal fertilization rate for rice growth (accordingto N requirement)
Calculation of soil N supply (NS)
Yun-Guan XI et al. Application of rice-growth model for fertilization
Introduction
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Research MethodResults and analysis
Discussion
To decide the optimal fertilization rate for rice growth (accordingto N requirement)
Calculation of soil N supply (NS)Calculation of N requirement (NR) of rice crop
Yun-Guan XI et al. Application of rice-growth model for fertilization
Introduction
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Research MethodResults and analysis
Discussion
To decide the optimal fertilization rate for rice growth (accordingto N requirement)
Calculation of soil N supply (NS)Calculation of N requirement (NR) of rice crop
Calculation of N application rate (FN)
Yun-Guan XI et al. Application of rice-growth model for fertilization
Introduction
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Research MethodResults and analysis
Discussion
Calculation of soil N supply (NS)
NS=TNAENQ(T30)/1010 0.08 2.25 10
6
where
TN - total N in soil
A - acreage of field under cultivation
EN- soil N supply efficiency; correction factor (%)
Q10 - temperature coefficient of mineralization of organic N inthe soil
T - mean temperature of the entire rice growing season
0.08 - ratio of mineralized N/total N
2.25 106 - dry weight (kg) of the soil in the surface layer
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionR h M h d
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Research MethodResults and analysis
Discussion
Calculation of soil N supply (NS)
EN= 0.5 0.1FpH0.2FOMS
where FpH and FOMS is an influence function of the effect of pHand OMS on NS respectively
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionR s h M th d
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Research MethodResults and analysis
Discussion
The soil of the experiment field is coastal desalinized soil 8.02 inpH, 22.7 g/kg in organic matter, and 1.60 g/kg in TN. ChongmingIsland has a mean temperature of 26.1C
FpH= 1.0FOMS= 0.419
EN= 0.316
NS= 77.78kg/hm2
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
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Research MethodResults and analysis
Discussion
Calculation of N requirement (NR) of rice crop
Based on the organic rice yield in the Yuejin Farm in 2001-2004,the targeted yield could be set as 7125kg/hm2 and the Nrequirement for 100kg grain could be set as 1.8kg; hence NRshould be 128.25kg/hm2
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
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Research MethodResults and analysis
Discussion
Calculation of N application rate (FN)
FN=NR NSNGTR
ECwhere
NG - N content in the green manure
Tr - utilization efficiency
In the experiment, FN= 62.8kg
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
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Research MethodResults and analysis
Discussion
Verification of the model
A field experiment was carried out in Shanghai Yuejin Farm in
2005Samples of soil and green manure were collected
The experiment was designed to have 5 N treatments
Data were analyzed with the Duncan method using the SPSSsoftware
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
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Research MethodResults and analysis
Discussion
Prediction of yields under different fertilization
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
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Results and analysisDiscussion
Comparison of rice growth by treatments
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
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Results and analysisDiscussion
Comparison of rice growth by treatments
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
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Results and analysisDiscussion
Comparison of pest/disease by treatments
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
R l d l i
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Results and analysisDiscussion
Comparison of pest/disease by treatments
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
R lt d l i
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Results and analysisDiscussion
Comparison of yield by treatments
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
Results and analysis
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Results and analysisDiscussion
Comparison of quality of rice grains by treatments
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
Results and analysis
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Results and analysisDiscussion
Discussion
It is feasible to use the selected model to predict rice yield
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
Results and analysis
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Results and analysisDiscussion
Discussion
It is feasible to use the selected model to predict rice yield
There was little difference between the treatments in yield
although the net N application rate varied sharply between thetreatments
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
Results and analysis
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Results and analysisDiscussion
Discussion
It is feasible to use the selected model to predict rice yield
There was little difference between the treatments in yield
although the net N application rate varied sharply between thetreatments
Pest/disease incidence was quite low in all treatments
Yun-Guan XI et al. Application of rice-growth model for fertilization
IntroductionResearch Method
Results and analysis
http://find/8/10/2019 Application and Analysis of Rice-growth model for organic rice fert mgt
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yDiscussion
Discussion
It is feasible to use the selected model to predict rice yield
There was little difference between the treatments in yield
although the net N application rate varied sharply between thetreatments
Pest/disease incidence was quite low in all treatments
Organic rice quality was quite stable and rarely impacted by
different N input levels
Yun-Guan XI et al. Application of rice-growth model for fertilization
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