热带优质牧草越冬寒害指标

热带优质牧草越冬寒害指标

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contributed at 2018-12-04

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Affiliation:  
岳天祥编著
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yue@lreis.ac.cn
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Earth System SubjectEarth Surface SystemBiosphere
Geography SubjectPhysical GeographyBiogeography

Detailed Description

热带优质牧草越冬寒害指标

 

 

式中Tc为有害积寒量,是一种低温危害积温。T0为热带牧草平流寒害临界温度,即T0=8℃;Ti为某次寒害过程的逐日均温;t为时间,以d为单位。为了与0℃一下的负积寒量相区别,Tc取正值,所以上式前加“-”号。寒害过程气温越低,Tc值就越大,热带牧草受害越严重。

若某个冬季有数次寒害天气过程出现,该年冬季热带牧草的有害积寒量可用下式表示:

 

 

式中,TW为某个冬季热带牧草的有害积寒量;m为某个冬季热带牧草寒害过程的总次数;g为次数。

 

参考文献

庞庭颐,宾士益,陈家武等: 华南引种优质牧草气候适应性的研究自然资源学报1992,7(3)

 

How to cite

《资源环境数学模型手册》 (2018). 热带优质牧草越冬寒害指标, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/682814c9-2fd6-47a5-8024-24740395cef5
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Contributor

contributed at 2018-12-04

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Affiliation:  
岳天祥编著
Email:  
yue@lreis.ac.cn
Homepage:  
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