JPS62224213A - Plant factory - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a plant factory for cultivating plants such as vegetables in an artificially controlled environment.

[Conventional technology]

In conventional plant factories, the goal is to keep all environmental conditions as uniform as possible in order to obtain a product of uniform weight. For example, [Vegetable Factory Technology and Economics J
(1983), pages 94 to 96, the illuminance of the cultivation bed surface was designed to be as uniform as possible.

[Problem that the invention seeks to solve]

However, with the above-mentioned conventional technology, in addition to the difficulty of making the illuminance uniform across a wide cultivation bed surface, there is also the problem that there is considerable variation in the weight of the product at the time of harvest due to individual differences in the growth of the plants themselves. was there.

An object of the present invention is to provide a plant factory in which there is little variation in the weight of products at the time of harvest, even if there are individual differences in growth among plants.

[Means for solving problems]

The above purpose is to artificially create a certain gradient in the illuminance of the cultivation bed surface during the growth stages after the seedling raising stage, and to adjust the illuminance to the size of the seedlings due to individual differences in plants that have developed up to the seedling raising stage. This can be achieved by cultivating large seedlings under lower illumination and growing small seedlings under higher illumination.

[Effect]

The gradient of illuminance on the cultivation bed surface after the seedling-raising stage acts to give a difference in the growth rate of plants in the subsequent growth stages that is approximately proportional to the gradient. Therefore, by planting seedlings with variable weight due to individual differences in plants or non-uniformity of environmental conditions up to the seedling-raising stage, the uniformity of the seedlings can be corrected during subsequent growth by matching the size and illuminance. Ru.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1(a), seeds 4 are sown on a cultivation trough 3 placed at the left end of a nursery bed 1 in a plant factory. The cultivation trough 3 moves to the right, reaches the right end of the seedling bed 1, and the ff seedlings end. There are variations in weight of the resulting seedlings 5 and 6. The seedlings are planted in a cultivation trough 3 at the left end of the growing bed 2, grow while moving to the right on the growing bed 2, and are harvested as a product 7 at the right end.

A lamp 8 for illumination is arranged in a part of the growing bed 2, and the growing bed 2 is illuminated only by the lamp. At this time.

As shown in Section 11i4(b), give a gradient 9 to the intensity of illuminance on the cultivation bed by adjusting the distance 1 ton between the bed and the lamps (or the arrangement density of the lamps 2 or a combination of both). . On the other hand, the seedlings 5 and 6 having different weights to be planted at the left end of the growing bed 2 are made to correspond to the illuminance gradient 9, and the larger seedlings are selected in order from the low illuminance side. Of course, the shape of the illuminance gradient 9 of the culture bed 2 may be as shown in FIG. 2.

According to this embodiment, it is effective to equalize the weight of products in a plant factory at the time of harvest.

〔Effect of the invention〕

According to the present invention, variations in the weight of seedlings that occur up to the seedling raising stage can be corrected by cultivation in the subsequent growing stage, which is effective in making the weight of the product uniform at the time of harvest.

[Brief explanation of drawings]

FIG. 1(a) is a plan view of a plant cultivation apparatus according to an embodiment of the present invention, FIG. 1(b) is a side view of FIG. 1(a) and the illuminance distribution on the aJa floor, and FIG. It is a figure which shows another way of giving the illuminance distribution of figure (b). 1... Seedling bed, 2... Growth bed, 3... Cultivation trough, 4... Seed, 5, 6... Seedling, 7... Harvest (product), 8... Illumination lamp, 9...Illuminance gradient curve. 1st mouth = 7 1/r spear to Takuju Saiatsu 2 Figure Cultivation Warehouse

Claims (1)

[Claims] 1. In a plant factory where plants are cultivated by controlling artificial environmental conditions, a plant characterized by having a certain gradient in the intensity of illuminance on the cultivation bed surface during the growth stages after the seedling stage of the plants. factory.