Light supplement method for greenhouse plant cultivation

Abstract

The invention discloses a light supplement method for greenhouse plant cultivation. At present, filament lamps, fluorescent lamps, sodium lamp, high pressure mercury lamps and the like are used as the main artificial light sources for supplementing light in greenhouse plant cultivation in China, but the emission spectra of these artificial light sources are incapable of well satisfying the selective demands of the growth of plants for light and the light utilization rate is low. The invention is characterized by using a light supplementing system to supplement light to greenhouse plants, wherein the light supplementing system comprises an LED mixed light lamp, a controller, a light intensity detecting device and a light source automatic lifting device; the controller comprises a microprocessor, a clock unit connected with the microprocessor, a serial communication port unit and a light intensity detection device; the microprocessor is connected with the LED mixed light lamp through an (input / output) I / O port wire; and the LED mixed light lamp is arranged on the light source automatic lifting device. In the invention, the problems of low efficiency of greenhouse light source, low utilization rate of effective physiological radiation light, overhigh operation and maintenance cost, overhigh energy consumption and the like are solved.

Description

technical field [0001] The invention relates to technologies in the process of agricultural cultivation and crop growth in greenhouse facilities, in particular to a method for supplementing light in greenhouse plant cultivation. Background technique [0002] In recent years, greenhouse cultivation has developed rapidly in my country, and my country has become a major producer of greenhouse facility agriculture, ranking first in the world in terms of area and output, accounting for about 90% of the world's total. However, the light in the greenhouse is still dominated by natural light and the utilization rate is low (generally 40% to 60% of the open field cultivation environment). Light is not only an indispensable energy condition for greenhouse vegetables to produce nutrients and life activities, but also a dominant factor for the formation of greenhouse microclimates. Most vegetables are light-loving crops. The quality of the light conditions in the greenhouse mainly depe...

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Problems solved by technology

[0008] In order to solve the deficiency of the light source used in the existing greenhouse plant cultivation, the present invention provides a method of supplementing light for greenhouse plant cultivation, according to the absorption spectrum of plant chlorophyll a, b and the ratio range of the ratio of chlorophyll a / b to the LED light source Carry out array design, and at the same time carry out intelligent supplementary light according to light intensity and quality under various meteorological conditions, so as to effectively solve the problem of low efficiency of greenhouse light sources, low utilization rate of effective physiological radiation light, high operation and maintenance costs, and high energy consumption. question

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