冬小麦产量和杂草密度关系的多变性模型

冬小麦产量和杂草密度关系的多变性模型

  82

Contributor

contributed at 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feed back

Classification(s)

Application-focused categoriesNatural-perspectiveLand regions

Model Description

Chinese {{currentDetailLanguage}} Chinese

冬小麦产量和杂草密度关系的多变性模型

   1)由Watkinson1981)提出的模型A

           

 

式中,是每单位面积上农作物产量的量度; 分别

是农作物和杂草的密度;w 是参数,w是孤立的

农作物的产量,a是一个农作物和杂草对农作物密度响应的方式,

A是一个农作物和杂草等量化的量度,b是参数,它表明农作物

产量在密度高时会降低,并刻画了资源的利用率。

2)由Firbank等人(1984)提出的模型B。如果农作物

密度像通常的谷物作物那样相对较高,则b=1,模型A被简化为:

 

 

3)由Wilcockson1977)和Cousens1985)提出的模型

C,认为对于某些物种组合,在杂草密度较高时,农作物产量不可能

到达零,产量损失为:

 

 

产量为:

 

式中,是自由杂草的产量; 是成比例的产量损失的渐进上限;

 是当杂草密度达到零时,每单位杂草密度的成比例的产量损失。

参考文献

    Cousens RFirbank L KMortimer A et al:冬小麦

和可可的产量和杂草密度之间关系的多变性。The Journal of

AppliedEcology1988,25

Model Metadata

Name {{metadata.overview.name}}
Version {{metadata.overview.version}}
Model Type {{metadata.overview.modelType}}
Model Domain
{{domain}}
Sacle {{metadata.overview.scale}}

There is no overview about this model. You can click to add overview.

Purpose {{metadata.design.purpose}}
Principles
{{principle}}
Incorporated Models
{{incorporatedModel}}
Model part of larger framework: {{metadata.design.framework}}
Incorporated Models
{{process}}

There is no design info about this model. You can click to add overview.

Information {{metadata.usage.information}}
Initialization {{metadata.usage.initialization}}
Hardware Requirements {{metadata.usage.hardware}}
Software Requirements {{metadata.usage.software}}
Inputs
{{input}}
Outputs
{{output}}

There is no usage info about this model. You can click to add overview.

How to Cite

《资源环境数学模型手册》 (2018). 冬小麦产量和杂草密度关系的多变性模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/4b0af5be-cffd-42fe-a158-f5fc9edde6f3
Copy

History

Last modifier : 
YY
Last modify time : 
2020-11-03
Modify times : 
View History

QR Code

Contributor(s)

initial contribute: 2018-12-04

Authorship

Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
View
Is authorship not correct? Feedback

History

Last modifier : 
YY
Last modify time : 
2020-11-03
Modify times : 
View History

QR Code

×

{{curRelation.overview}}
{{curRelation.author.join('; ')}}
{{curRelation.journal}}

You can link related {{typeName}} from repository to this model item, or you can create a new {{typeName.toLowerCase()}}.

Related Items
Related Items

You can link resource from repository to this model item, or you can create a new {{typeName.toLowerCase()}}.

Drop the file here, orclick to upload.
Select From My Space
+ add

These authorship information will be submitted to the contributor to review.

Cancel Submit
Model Classifications
Cancel Submit
Localizations + Add
{{ item.label }} {{ item.value }}
Model Name :
Cancel Submit
Name:
Version:
Model Type:
Model Domain:
Scale:
Purpose:
Principles:
Incorporated models:

Model part of

larger framework

Process:
Information:
Initialization:
Hardware Requirements:
Software Requirements:
Inputs:
Outputs:
Cancel Submit
Title Author Date Journal Volume(Issue) Pages Links Doi Operation
Cancel Submit
Add Cancel

{{articleUploading.title}}

Authors:  {{articleUploading.authors[0]}}, {{articleUploading.authors[1]}}, {{articleUploading.authors[2]}}, et al.

Journal:   {{articleUploading.journal}}

Date:   {{articleUploading.date}}

Page range:   {{articleUploading.pageRange}}

Link:   {{articleUploading.link}}

DOI:   {{articleUploading.doi}}

Yes, this is it Cancel

The article {{articleUploading.title}} has been uploaded yet.

OK
Cancel Confirm