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A calculation method for separating the influence of key factors on crop phenology based on a crop growth mechanism model is provided

A technology of crop growth and mechanism model, applied in the direction of calculation, computer-aided design, design optimization/simulation, etc., can solve problems such as inter-annual yield differences, and achieve the effect of improving the seeding system

Inactive Publication Date: 2018-12-18
河北省科学院地理科学研究所
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Problems solved by technology

Different crop varieties respond differently to climate change, and the growth and development process of the same crop variety is mainly affected by climate conditions, which ultimately leads to inter-annual yield differences

Method used

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  • A calculation method for separating the influence of key factors on crop phenology based on a crop growth mechanism model is provided
  • A calculation method for separating the influence of key factors on crop phenology based on a crop growth mechanism model is provided
  • A calculation method for separating the influence of key factors on crop phenology based on a crop growth mechanism model is provided

Examples

Experimental program
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Embodiment

[0037] Example: Based on the crop growth mechanism model, the effects of climate change, sowing date adjustment, and variety change on corn phenology in northern China in the past 30 years (1981-2010) were calculated.

[0038] 1. Determine the reference crop varieties and the variety accumulated temperature parameter range of the research site

[0039] (1-1) Four representative sites are selected as the research sites: Chifeng, Fengning, Changzhi and Wuwei. Based on the experimental observation data of the National Agricultural Meteorological Station in the past 30 years (1981-2010), the past 30 years of the four representative sites are determined. The annual crop varieties are changed, and the crop varieties in the initial period of the research period of each site are selected as the reference crop varieties, as shown in Table 1.

[0040] Table 1 Variety changes and benchmark crop varieties of representative sites in the past 30 years

[0041]

[0042] (1-2) According to the phenol...

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Abstract

A calculation method for separating the influence of key factors on crop phenology based on a crop growth mechanism model is provided. By adjusting the accumulated temperature parameters of crop mechanism model varieties with the phenological data observed in the field, crop growth processes under different scenarios are simulated by a crop phenology model to separating the influence of key factors such as climate change, sowing date adjustment and variety change on crop phenology. The method can directly separate the influence of each key factor on crop phenology and is of great significancefor crops in coping with climate change, guiding variety breeding and improving a sowing system.

Description

Technical field [0001] The invention relates to a calculation method that uses a crop growth mechanism model to separate and evaluate the effects of climate change, sowing date adjustment and crop variety conversion on crop phenology, and belongs to the technical field of agricultural sustainable development adaptability assessment. Background technique [0002] Plant phenology specifically refers to the regular changes of germination, leaf emergence, flowering, maturity, and dormancy that occur with seasonal changes in climate under a certain growth environment, which can objectively reflect the response of plant growth and development to external environmental conditions And adaptability. As the global surface temperature continues to rise, important changes have taken place in plant phenology in the past few decades. [0003] The response of crop phenology to climate change has become an important part of studying the impact of climate change on agricultural production. The lo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2119/08G06F30/20
Inventor 肖登攀柏会子唐建昭张可慧刘剑锋王仁德李庆
Owner 河北省科学院地理科学研究所
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