Fully biodegradable foaming seedling tray suitable for mechanical transplanting and preparation method thereof

Abstract

The invention provides a fully biodegradable foaming seedling raising tray suitable for mechanical transplanting and a preparation method thereof. The biodegradable foaming seedling tray includes the following components by weight: 50-80 parts of full bio-based degradable resin, 10-30 parts of bio-based filler and 0.5-5 parts of auxiliary agent; The expansion ratio is 1-15, and the biodegradable foaming seedling tray is used for seedling cultivation and transplanted by mechanical separation of seedlings after cultivation. The preparation method of the biodegradable foamed seedling raising tray comprises the steps of: mixing raw materials, extruding and granulating, preparing foamed sheets, and forming the foamed seedling raising tray. The foaming seedling raising tray of the present invention has safe degradation performance, can also realize automatic mechanical transplanting of seedlings, and has low cost.

Description

technical field [0001] The invention relates to the field of agricultural seedling raising, and more particularly relates to a fully biodegradable foaming seedling raising tray suitable for mechanical transplanting and a preparation method thereof. Background technique [0002] In agricultural production, seedling transplanting divides the growth cycle of crops into two stages: concentrated seedling cultivation before transplanting and field growth after transplanting. Compared with direct field sowing, it can prolong the growth period of crops, so it can increase production and income. It is widely used in China, especially in the production of rice, vegetables and some other economic crops as a conventional planting technique. Seedlings can be grown directly on the seedbed or in a seedling container. The traditional seedling container is non-degradable and blocks the root development of the crop. After the seedling is completed, the crop seedling must be taken out of the c...

AI Technical Summary

Problems solved by technology

However, there are obvious defects in the seedling trays made of traditional plastics: first, the seedling trays made of traditional plastics such as polyethylene, polyvinyl chloride, polystyrene, and polypropylene can adopt a uniform bowl-hole structure, which can realize seedling cultivation. A single plant in the tray is independently raised in a pot, but the seedling tray must be separated when transplanting. Usually, the root system (rice) is cut off or the seedlings are artificially separated (crops other than rice) when the seedlings are separated. It is difficult to achieve mechanical damage to the root system and plant seedlings. Or the implementation method is too complicated and not practical enough; the second is that after the traditional material seedling trays are used in agriculture, because the materials cannot be degraded, they are often discarded at will after use, causing great pollution to the ecological environment

However, there are still two shortcomings in this method: one is that the cost of use is relatively high. Since degradable materials belong to the category of new materials, the prices of various biodegradable materials are significantly higher than those of traditional plastics, and the processing is difficult, resulting in biodegradation. The cost of the seedling tray is relatively high, so while solving the problem of automatic transplanting, the cost of transplanting will also be high

The second is to adopt "transplanting with a tray". The seedling tray needs stronger mechanical strength in the seedling cultivation stage, and lower mechanical strength is required in the transplanting stage after the seedlings are grown, especially a lower notch tearing force value. Otherwise, it may cause the machine to tear the adjacent seedling tray body when cutting the seedling tray. When this happens, it will block the seedling opening and cause seedling leakage.

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