A plant cultivation light source includes at least two light sources selected from first, second, and third light sources that emit first, second, and third lights, respectively. The first light has a first peak at a wavelength from about 400 nanometers to about 500 nanometers, the second light has a second peak appearing at a wavelength, which is longer than the first peak, from about 400 nanometers to about 500 nanometers, and the third light has a third peak appearing at a wavelength, which is shorter than the first peak, from about 400 nanometers to about 500 nanometers. The first light is a white light and has a first sub-peak having an intensity lower than an intensity of the first peak at a wavelength from about 500 nanometers to about 700 nanometers. The first sub-peak has a full-width at half-maximum greater than a full-width at half-maximum of the first peak.

The present invention concerns a solid nanocomposite material consisting of a polymer-matrix in which are dispersed alkali metal, hydronium or ammonium salts of polyanionic components, wherein the polymer-matrix comprises at least a linear or branched polymer or copolymer containing one or several poly(ethylene oxide) (PEO) chains, said polymer or copolymer being optionally crosslinked and each PEO chain having at least 4 ethylene oxide monomer units. The present invention relates also to a photonic, e.g. optoelectronic, device comprising such a nanocomposite material. Such material and device can be used as phosphorescence emitter, for crop growth lighting or for generating singlet oxygen.

The systems and methods disclosed herein include an apparatus that includes a user interface configured to receive user input, and a photoperiod controller configured to calculate a photoperiod schedule for one or more plants based on the user input and generate control signals that adjust light output of at least one luminaire to implement the photoperiod schedule.

A light source unit for plant cultivation includes: a first light emitter emitting a primary light and a converter disposed on a path of the primary light to produce a first light, and a second light emitter emitting a second light, wherein combined light emitted from the first light emitter and the second light emitter produces a basic spectrum including at least three peak wavelengths, with a difference between relative intensities of at least two of the peak wavelengths being less than 20%.

The invention discloses a method of rapid generation-adding breeding of rice in the technical field of rice breeding, including soaking seeds of the rice, germination, seedlings cultivation, managing and regulating of the rice at the growth stage, and harvesting the rice. The managing and regulating the rice at the growth stage includes dynamic light quality and photoperiod control in vegetative growth period, heading period and pustulation period; growth period involves light environment regulation with the ratio of red light: blue light: white light of 0.8-1: 0.8-1: 1.0, photoperiod of 16-18 h; heading period involves light environment regulation with the ratio of red light: blue light: white light of 1-2: 0.5-1: 1, photoperiod of 12-13.5 h; and pustulation period includes light environment regulation with the ratio of red light: blue light: white light of 1-2: 1: 1, photoperiod of 16-18 h.

An intelligent seeding and fertilizing machine for intercropping comprises: a fixed frame, a plurality of seeding devices arranged in parallel in the fixed frame and a plurality of guide columns fixedly connected in the fixed frame, where one end of fixed frame close to a cutting mechanism is provided with a lifting plate, a side of the fixed frame is in sliding contact with an inner wall of a lifting groove, the lifting groove is provided with a lifting screw, a lifting motor is fixedly connected to a top surface of the lifting plate; each seeding device includes a frame, and a bottom surface of the frame is respectively provided with a cutting mechanism, a cleaning mechanism, a furrowing mechanism, a fertilizing mechanism, a seeding mechanism and a soil covering mechanism, and the above mechanisms and the lifting motor are all electrically connected with a control system.

A system for heat and light management for indoor horticulture is described. More particularly, a system including light sources, a light distribution chamber, and circulating water is described.

Provided herein is a high intensity discharge light source having a thermally insulative and optically transparent sleeve for maintaining or enhancing a spectral performance parameter. The configuration of the sleeve provides an insulative volume that allows an elevated steady state operating temperature to be reached, even when the light source is cooled. The sleeve is also configured to withstand a bulb failure event, thereby protecting the surrounding environment from falling debris. Also provided herein are methods for dissipating heat from the light source without adversely affecting the bulb operating temperature or the enhanced spectral performance parameter.

The present invention provides a circular polarization illumination device which can irradiate right-circularly polarized light at a large light amount from a light source of right-circularly polarized light with a high efficiency and can irradiate left-circularly polarized light at a large light amount from a light source of left-circularly polarized light with a high efficiency, and a plant growth regulation method that can efficiently regulate the promotion or inhibition of the growth of plants by using the circular polarization illumination device. Moreover, the illumination device includes a light-emitting light source, a reflective polarizing plate, reirradiation unit, and circular polarization conversion unit.