JPS63192323A - Rock wool fine grain cotton - 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 (Field of Industrial Application) The present invention relates to fine cotton made of fine rock wool, which can be used as a medium for growing plants, a medium for cultivating mycelium, and a bed for raising seedlings.

(Conventional technology) The rock wool used for rock wool cultivation is cured using a binding agent, and is made into a large block shape with a certain thickness, for example 751, and a size of several tens of centimeters+ in length and width. It is a molded product, and its weight per volume is 40
~150kg/n? , usually in the low range of 80 kg/d.

In addition, although various efforts have been made to create special beds for growing lettuce and the like, in any case, soil that is prone to continuous cropping problems is used as is.

(Problems to be Solved by the Invention) When using the above-mentioned conventional seedling beds, it is impossible to raise seedlings stably due to continuous cropping problems, and in greenhouse cultivation, etc., it requires a large-scale and huge amount of work, such as replacing all the soil. This is a method that is extremely inefficient and has no choice but to rely on expensive methods.

Further, the above-mentioned conventional rock wool cultivation flooring material has the following problems.

That is, they have low water retention capacity and are difficult to handle, such as being difficult to transplant into soil, and it is also difficult to adjust and change the level of water retention and air permeability.

Furthermore, the water sampling structure of rock wool blocks is completely different from that of soil, which is complex and exhibits a significantly high PF, and is simply due to capillary action, and the capillaries are continuous. For this reason, even if an attempt is made to plant seedlings of plants grown in the Rosocool block into the soil together with the rock wool blocks, most of the water from the rock wool blocks will be sucked into the soil, resulting in inconveniences. In an attempt to improve this point, increasing the density of the rock wool creates the gaps between the rock wool fibers, which makes it difficult for plants to spread their roots and reduces air permeability, leading to major drawbacks.

(Object of the Invention) Therefore, the present invention was made to solve the above-mentioned problems, and its purpose is to provide fine cotton that can be used as a bed for raising seedlings, which is easy to handle and whose moisture retention and air permeability can be adjusted. There is something to do.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes the following configuration.

That is, the particle size distribution of granules excluding particles with a particle size of less than 0.5 am is 50 to 1 in the range of 0.5 to 2.38 mm in the sieve mesh of a shaking sieve according to JIS Z8801.
00%, and 50% to 0% of the remaining portion is 2.38 mm+ or more.

(Function) This fine cotton is pure rock wool and does not contain any undesirable binders, so it can be freely deformed and filled as a whole and used in pots for raising seedlings. It has an aggregate structure and is close to soil.
It can be used by mixing with soil, and when mixed with soil, it acts as a water-resistant aggregate and improves air permeability.

(Example) Pure rock wool containing no binder is mechanically processed into fine particles. Its particle size distribution is JIS Z8801
In the shaking sieve test, the granules in the sieve mesh of the shaking sieve machine, excluding those with a particle size of less than 0.5 mm, were 50 to io in weight% in the range of 0.5 to 2.38 mm
o%, and of the remainder, 4.75+a+s or more is 50-0%. In addition, almost all of those having a diameter of 4.75 mm+ or more are 10 mm or less. Fine cotton obtained by molding rock wool into fine cotton particles is, for example, ungranulated, spindle-shaped, and has hydrophilic properties. There are spaces between individual particles, and this large space allows for good air circulation, and the density of rock wool in terms of individual particles increases moisture retention to a level that was previously impossible. Strength can also be improved. In other words, the weight per volume of fine cotton as a whole can be around 200 to 250 kg/rrr, and when viewed in terms of each individual particle, it is equivalent to 250 to 300 kg/M as rock wool. ing.

The rock wool fine cotton made in this way can be used on beds for raising seedlings, in potted plants, and as long as the lower part is supported, and can be used with nets, plates, sheets, colanders, etc. Micro-grained cotton can also be used alone in hydroponic plants by being supported.

For raising seedlings, it is suitable to use fine cotton alone or mixed with soil. In other words, by adding fine cotton to mature soil and adding park compost and peat moss, it becomes very suitable as a potting soil for raising seedlings. This is thought to be because fine cotton aggregates the soil, improves rooting and aeration, and allows healthy seedlings to grow.

Note that adjusting the particle size distribution within a certain narrow range has few advantages in terms of cost and seedling growth.

Figure 1 shows the state of root extension.

(Effects of the Invention) As described above, the present invention uses rock wool that melts and turns into fibers at a high temperature of 1500°C, so it is completely sterile and is especially suitable for raising young seedlings that are susceptible to pathogens. , it can be partially removed and transplanted freely, and it has good air permeability even though the rock wool has high density and capillary division, etc., which have enough moisture retention power to prevent water from escaping even after transplanting into the soil. Plant roots are easier to spread and growth is significantly promoted. In other words, because there are many spaces between individual particles, root tension is good, and fine roots are often generated. The properties and air permeability can also be adjusted by changing the mixing ratio of fine cotton and soil, which has the same effect as creating the most desirable water-resistant aggregates in soil structure.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

As for the drawings, FIG. 1 shows an example of root elongation of a plant when the fine rock wool cotton according to the present invention is used as a medium, and FIG. 2 is a graph showing the moisture content of the fine cotton.

Claims (1)

[Claims] 1. The particle size distribution of granules excluding particles with a particle size of less than 0.5 mm is 50 to 100% in the range of 0.5 to 2.38 mm in the sieve mesh of a JIS Z8801 shaking sieve machine.
Rock wool fine grain cotton formed by molding rock wool into granules in a certain range, in which 50 to 0% of the remainder is 2.38 mm or more.