Meteorological condition-based construction method for annual grade region prediction model of big and small years of yield of Hepu litchis

Abstract

The invention discloses a meteorological condition-based construction method of a Hupu litchi yield big and small year type grade region prediction model. The construction method comprises the following steps of 1, collecting regional litchi yield big and small year type grade data; 2, determining meteorological data; step 3, meteorological index screening; 4, determining a prediction model and parameters, providing direct field management measures and standards for producers and managers, covering short litchi trees with thin films when conditions exist, increasing the sunlight intensity, and regulating the lowest temperature to be 26.5-27.5 DEG C between June 6th and July 31th in the current year through measures such as irrigation, ground grass covering and reflective film laying, so that the yield of the litchi trees is increased, and the yield of the litchi trees is increased. In a main litchi producing area, compared with the annual yield per unit, the yield per unit is completely possible to be increased by more than 50% through regulation and control of microclimate conditions, and the economic benefit is very huge; sunshade, irrigation, ground grass covering and other measures are conventional cultivation technologies in main litchi producing areas, and popularization and application are easy.

Description

technical field [0001] The invention relates to the technical field of quantitative prediction of horticultural crop yield, in particular to a method for constructing a regional prediction model of Hepu litchi yield, size, year, type, and grade based on meteorological conditions. Background technique [0002] Litchi is one of the tropical and subtropical fruit trees that require the strictest climatic conditions in the world. The vegetative growth period requires sufficient sunshine, high temperature and rainy weather; the flower bud differentiation period requires low temperature and dryness; the fruit development period requires sunny weather. Litchi is a perennial fruit tree, and the annual output fluctuation is mainly affected by the meteorological conditions in the production cycle. When the output is 100% in a large year, the output in a small year is less than 30%, that is, the maximum annual fluctuation of litchi output is about 70%. In the industry, the change in o...

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Problems solved by technology

The problem of litchi variety yield size, annual type and grade has not been solved. The fundamental reason is that no key quantitative influencing factors have been found.

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