Winter wheat water consumption predicting method based on weather forecast information

A technology of weather forecasting and forecasting methods, applied in the field of agriculture, can solve problems such as insufficient integration of water management

Inactive Publication Date: 2014-06-25
FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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Problems solved by technology

[0004] The purpose of the present invention is to provide a winter wheat water consumption prediction method based on weather forecast information, aiming to solve the problem of insufficient combination of soil moisture monitoring and irrigation forecasting with water management in irrigation areas in my country

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  • Winter wheat water consumption predicting method based on weather forecast information
  • Winter wheat water consumption predicting method based on weather forecast information
  • Winter wheat water consumption predicting method based on weather forecast information

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Embodiment 1

[0045] A method for forecasting water consumption of winter wheat based on weather forecast information, comprising the following steps:

[0046] S1. Discussion on ET based on weather forecast measurable factors 0 The application effect of the estimation method, to screen out ETs with both forecast accuracy and full use of existing weather forecast information on different time scales 0 estimation method;

[0047] In step S1, the reference crop water requirement (ET 0 ) is the basis for irrigation forecasting and irrigation decision-making. The present invention mainly utilizes the weather forecast measurable factor (temperature) to discuss the ET based on temperature 0 The application effect of the estimation method, in order to screen out the ETs with certain forecast accuracy on different time scales and can make full use of the existing weather forecast information 0 Estimation method. The daily meteorological data (including maximum and minimum temperature, relative ...

Embodiment 2

[0139] Example 2 Application and Verification of Winter Wheat Daily Water Consumption Prediction Model

[0140] In the Guangli Irrigation District and the Renmin Shengli Canal Irrigation District, the soil moisture in the next ten days is predicted by using the established crop water consumption prediction model and water balance equation based on the weather forecast information, combined with the measured soil moisture. Moisture data, necessary verification and precision analysis of the model.

[0141] Combined with the weather forecast information, the soil moisture in the next 10 days is predicted based on the measured soil moisture data of winter wheat before and after the greening period in the Renmin Shengli Canal Irrigation Area and Guangli Irrigation Area. At the same time, the soil moisture in the irrigation area is measured after 10 days to verify the model. forecast accuracy.

[0142] The comparison and analysis of the measured values ​​of soil moisture at 24 moni...

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Abstract

The invention provides a winter wheat water consumption predicting method based on weather forecast information. With comprehensive consideration of influences of the crop self-growth-and-development situation and the environment factors including the meteorological condition, the soil condition and the like, a prediction model for estimating the reference crop water requirement (ET0) based on the weather forecast information and a model for estimating a winter wheat crop coefficient based on accumulative temperature are established through field trials and numerical simulation, the prediction model and the model for estimating the winter wheat crop coefficient are coupled into a water balance equation, real-time prediction is conducted on the soil moisture content of winter wheat in a Guangli irrigated area and a people victory canal irrigated area, and irrigation date and irrigating water quota are determined according to irrigating index of different growth periods of the winter wheat so that real-time monitoring of the soil moisture content, drought severity comprehensive analysis and real-time prediction of crop irrigation are achieved. The visual decision basis is provided for an irrigation management layer and a decision maker, timely and appropriate amount of irrigation is instructed for the irrigated areas, and the utilization rate and utilization efficiency of an irrigation water resource of the irrigated areas are improved.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a method for predicting water consumption of winter wheat based on weather forecast information. Background technique [0002] Drought is a natural phenomenon that has a huge impact on the economy, society and environment. Compared with other disasters, it has many occurrences, long duration and wide range of influence. It is the main factor that plagues my country's agricultural production, and has become one of the important factors restricting my country's economic development and social progress. According to statistics, an average of 20 million hectares of grain are affected by drought in my country every year, and the loss of grain accounts for 50% of the grain production reduction due to disasters in the country. my country loses about 100 billion kg of grain every year due to drought and water shortage. The use of irrigation to alleviate drought is an im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/02
Inventor 刘战东张寄阳刘祖贵高阳王声锋刘浩李迎秦安振南纪琴
Owner FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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