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Method for Estimating Potential Yield of Sugarcane in Complex Terrain and Climate Region

A technology for complex terrain and sugarcane, applied in the field of optimal estimation of solar radiation and potential yield of sugarcane, can solve the problems of high estimated value of solar radiation and difficulty in obtaining the prediction result of potential sugarcane yield, etc., so as to improve the overall estimation accuracy and accurately predict sugarcane yield. Effect

Active Publication Date: 2019-04-19
SUGARCANE RES INST OF YUNNAN ACADEMY OF AGRI SCI
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  • Application Information

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Problems solved by technology

However, in the low-latitude plateau of Yunnan and other sugarcane areas with complex terrain and climate conditions and lack of measured solar radiation data, if the fixed parameters recommended by the International Agriculture and Forestry Organization (FAO) are directly used to drive the Estrum sunshine model, the estimated value of solar radiation will often be too high. High (low in a few areas), which makes it difficult to obtain more accurate prediction results of sugarcane potential yield by using crop growth models

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  • Method for Estimating Potential Yield of Sugarcane in Complex Terrain and Climate Region
  • Method for Estimating Potential Yield of Sugarcane in Complex Terrain and Climate Region
  • Method for Estimating Potential Yield of Sugarcane in Complex Terrain and Climate Region

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Embodiment Construction

[0021] Estimating solar radiation and sugarcane potential yield in complex terrain and climate regions, the specific implementation methods are as follows:

[0022] 1. Obtain the latitude and longitude coordinates and altitude data around the farmland or local meteorological stations, calculate a and b values ​​according to formulas (1) and (2), and calculate solar radiation R according to formula (3) s ; where, a, b are the model experience coefficients, H is the altitude (m), R s is the solar radiation (MJ m -2 the day -1 ), R a is the zenith radiation (MJ m -2 the day -1 ), n is the actual sunshine hours (h), and N is the local day length (h):

[0023] a=1.57×10 -5 H+0.1705 (1)

[0024] b=2.01×10 -5 H+0.5416 (2)

[0025]

[0026] 2. Input the calculated solar radiation daily value and local daily maximum temperature, minimum temperature, precipitation and other meteorological data into the APSIM-Sugar sugarcane growth model, and set the variety module, soil modu...

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Abstract

The present invention relates to a method for estimating solar radiation and sugarcane potential output in a region with complex terrains and climates. The method comprises the steps of firstly optimizing parameters a and b of an Angstrom-Prescott model and calculating day value of solar radiation; and then setting parameters of an APSIM-Sugar model and simulating sugarcane potential output. The method for better estimating the solar radiation and sugarcane potential output in the region with complex terrains and climates is obtained by using measured data statistics of a representative station, model simulation, parameter optimization comparison as well as the Angstrom-Prescott model and the APSIM-Sugar sugarcane growth model. In a sugarcane region where solar radiation data cannot be obtained directly and the terrains and climates are complex, the solar radiation is estimated more accurately, so that the sugarcane output is predicted more accurately.

Description

technical field [0001] The invention relates to the technical field of sugarcane farmland production, in particular to a method for optimizing and estimating solar radiation and potential yield of sugarcane. Background technique [0002] Solar radiation is the basic driving force for crop growth and development, and accurate estimation of solar radiation is an important prerequisite for related research using crop growth models. Previous studies have shown that the Estrum sunshine model ( -Prescottmodel) is an effective method for estimating solar radiation using sunshine hours; crop growth model is a powerful tool for evaluating crop yield and climate impact in recent years. However, in the low-latitude plateau of Yunnan and other sugarcane areas with complex terrain and climate conditions and lack of measured solar radiation data, if the fixed parameters recommended by the International Agriculture and Forestry Organization (FAO) are directly used to drive the Estrum sun...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06Q10/04G06Q50/02
CPCG06F30/20G06Q10/04G06Q50/02
Inventor 毛钧范源洪陆鑫陈学宽蔡青刘新龙李纯佳徐超华刘洪博林秀琴
Owner SUGARCANE RES INST OF YUNNAN ACADEMY OF AGRI SCI