Index-linear equation-based facility crop dry matter production simulation method

Abstract

The invention discloses an index-linear equation-based facility crop dry matter production simulation method, and belongs to the technical field of agricultural information processing. The method comprises the following steps: measuring the dry weight of an overground part of a crop through a facility crop cultivation experiment; calculating daily temperature light effect of the crop according to environment meteorological data and crop growth and development three cardinal temperature acquired by consulting documents; calculating the maximum growth rate of the dry weight of the overground part of the crop in a linear growth stage and an index stage; and establishing an index-linear equation-based facility crop dry matter simulation model. The dry matter production module established by the method can predict the production of the dry matter of the overground part of the crop in any day after field planting, and has a few parameters. By measuring daily average temperature and photosynthetically active radiation, the production of the dry matter of the overground part of the facility crop can be predicted.

Description

technical field [0001] The invention discloses a method for simulating dry matter production of facility crops based on exponential linear equations, and belongs to the technical field of agricultural information processing. Background technique [0002] Since the 1990s, facility agriculture has developed rapidly, focusing on out-of-season and off-season vegetable cultivation. The area of ​​facility agriculture has grown from 108,000 mu in 1981 to more than 45 million mu in 2010, an increase of more than 440 times in 29 years. The development of facility agriculture also provides the most basic and solid guarantee for the supply of off-season vegetables in cities. Dry matter production is the material basis for the yield and quality of facility crops. The dry matter produced and distributed to leaves before fruiting forms photosynthetic leaf area and affects the vegetative growth of plants, while the dry matter distributed to fruits after fruiting directly participates in cr...

AI Technical Summary

Problems solved by technology

All three methods have certain defects. The effective accumulated temperature method does not consider the hysteresis effect of high temperature on crop growth. The dry matter model of photosynthesis needs to measure photosynthetic parameters, and the calculation is more complicated.

The light temperature index of the radiation heat product method is the radiation heat product, and the temperature effect and the light effect are not considered separately. When the light intensity is at the light compensation point and the temperature value is high, the calculated radiation heat product value is high, and the actual dry matter growth When the amount is low, the simulation error is large

Images