Method for predicating single yield of crops in irrigated area

A single yield and yield technology, applied in the directions of botanical equipment and methods, horticultural methods, instruments, etc., to achieve the effect of enhancing feasibility and stability

Inactive Publication Date: 2009-07-15
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for predicting the yield of crops in irrigated areas, which takes into account environmental factors and socioeconomic factors, overcomes the defects of a single model, is simple and easy to implement, and has high rationality and accuracy

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  • Method for predicating single yield of crops in irrigated area
  • Method for predicating single yield of crops in irrigated area
  • Method for predicating single yield of crops in irrigated area

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Embodiment

[0055] The original data are the historical data of cotton yield and some environmental factors in an ecological irrigation area in Gansu Province from 1988 to 2005 (as shown in Table 1).

[0056] Table 1

[0057] year

[0058] 1990 1170 853.8 21.7 41.2 23.1 49.0 1991 1335 852.4 22.2 46.6 23.7 51.3 1992 1545 853.6 22.8 48.3 22.1 53.0 1993 1392 852.7 20.6 42.9 24.4 52.5 1994 1060 851.0 19.6 40.4 22.5 51.3 1995 1173 852.6 20.9 45.7 19.8 52.7 1996 1278 851.9 21.7 46.8 20.6 53.1 1997 1290 850.6 21.5 46.9 21.6 53.6 1998 1580 854.7 22.0 49.3 20.8 56.2 1999 1820 852.8 23.2 53.3 24.5 58.8 2000 1391 853.1 21.7 48.5 20.1 54.8 2001 1657 854.5 23.9 53.0 19.8 59.4 2002 1740 853.9 23.7 53.1 19.6 59.2 2003 1722 855.2 23.6 53.9 20.1 58.9 2004 1659 854.8 23.8 53.7 21.3 59.2 2005 1610 853.2 24.2 52.8 22.8 58.4

[0059] ...

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Abstract

The invention provides a method for forecasting the crop yield of per unit area in an irrigation district. Respective forecasting models of economic yield and environmental yield are respectively built, and then a combined forecasting model of crop field is obtained through the weighted sum of weight coefficients. The method weakens the respective defects of different models to enable the two models to mutually and self-adaptively complement each other, and also weakens the system analysis limitations brought by unilaterally forecasting the crop yield according to the socio-economic factors or natural environment factors simultaneously.

Description

technical field [0001] The invention belongs to the technical field of ecological system analysis in irrigated areas, and in particular relates to a method for predicting per unit yield of crops in irrigated areas based on gray theory and evolutionary algorithm. Background technique [0002] With the continuous development of agricultural marketization, crop varieties and planting structures have changed greatly. The agricultural production management departments in irrigation areas, as well as local agricultural producers and agricultural-related enterprises, have higher and higher requirements for crop yield forecast information. Predicting changes in crop yields is of great significance to local policy macro-control and regional structural adjustment. Establishing a suitable forecasting model and increasing crop yield forecasting research can strengthen the pertinence of agricultural meteorological services in irrigation areas, increase the accuracy of forecasting, and me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G7/00A01G1/00G06F19/00
Inventor 王乘陈玥
Owner HUAZHONG UNIV OF SCI & TECH
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