JPS59106228A - Soil for growing seedling - 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 The present invention relates to soil for raising seedlings that provides soil-attached seedlings with mechanical strength that prevents the soil attached to the roots from coming off when transplanting the soil-attached seedlings.

Currently, pre-containers of various shapes have been developed for vegetables, flowers, rice, etc., and growing and transplanting of seedlings with soil is becoming more common.

When transplanting seedlings with soil, there is little root damage or damage to the plants, and attachment is good, and mechanical transplantation is possible by handling the root part (hereinafter referred to as the root ball part) of the seedling in a way that will not damage the seedling instead of handling the plant itself. This has advantages such as making it possible to save labor.

However, the seedling cultivation soil currently in use has not been designed to strengthen the root ball, which tends to collapse or chip during transplanting, reducing the efficiency of transplanting operations.

As a countermeasure for this problem, methods such as using soil to which fibrous organic materials such as peat moss are added, or using wet soil made into a clay bed to increase the adhesion of the soil particles themselves, have been taken, but methods such as mixing and cross-conducting There are drawbacks such as the need for labor and the reduction of soil air permeability, which inhibits the growth of young plants, and (2) the strength of the root ball is also unsatisfactory.

In view of the above-mentioned circumstances, the inventors of the present invention have conducted intensive studies and determined that by mixing a polymer of % to %] as a binder to soil, it can be easily used, does not inhibit the growth of young plants, and can be transplanted. The inventors have discovered a soil for raising seedlings that can produce seedlings with sufficient root ball strength, and have thus arrived at the present invention.

That is, the present invention provides 10CH2-CH-)-COONa
To provide soil for raising seedlings, which is obtained by mixing 0.05 to 5% by weight of an acrylamide copolymer containing 0.01 to 20 mol% of repeating units represented by + to soil.

The present invention will be explained in detail below.

The main component of the seedling raising soil of the present invention is soil, which contains, in addition to moisture and fertilizer components, organic materials, pHM moderators, humic substances such as nitrophumic acid, water-retaining substances such as bentonite, and zeolite powder. It may also contain mineral powder or the like that is effective in improving fertilizer retention. The soil used in the present invention may be in powder or granular form, but granulated soil is preferable since it is easy to obtain the caking effect of the present invention even if the amount of adhesive substance added is small. More preferably, the particle size is 0.5~
It is preferable that the grain be granulated to a grain size of 8.0.

In the present invention, the acrylamide copolymer to be mixed with soil mainly consists of 0NH2 repeating units represented by +CH2-CH→-, and also contains 1+CH2-CH←CC
The copolymer contains 0.01 to 25 mol% of the repeating unit represented by yL)-Na+.

This copolymer can be obtained by a known method such as copolymerizing acrylamide and sodium polyacrylate or partially hydrolyzing an acrylamide homopolymer with NaOH. The molecular weight of the copolymer is not particularly limited, but is generally about 1 million to 16 million.

The content of +CH2-CH+ one unit in the copolymer is COO
Na+ 0.01-25 mol%, preferably 0.1-5 mol%.

No effect as a copolymer.

In addition, the amount of the copolymer added to soil is 0.0
5 to 5% by weight, preferably 0.1 to 8% by weight.
．． If the weight is less than 0.5%, the soil will not have sufficient cohesive strength, and if it exceeds 5% by weight, the cost will increase, and the soil will stick and become difficult to work with when filling seedling containers, and the growth of some crops may be affected. This is not preferable because it may suppress the effect.

Methods for creating a seedling growing surface with the above concentration include a method of mixing the copolymer and soil all at once, and a method of preparing a master batch soil containing a high concentration of the copolymer in advance, and then mixing this with soil to obtain a predetermined concentration. There is.

When raising seedlings using the soil for raising seedlings of the present invention, for example, there is no need to purchase and mix peat moss, and when filling the soil into the growing container, the beet (5) moss and soil will separate again. You don't have to think about such troubles. Alternatively, there is no need to make a clay bed and pack it in. The packed soil has large pores and good ventilation and water permeability, so growth is smooth and unrestricted.

Therefore, the present invention is simple and easy to use, does not inhibit growth, and provides sufficient root ball strength during transplantation, and has significant economic and practical effects.

The growing soil of the present invention can be used for vegetables, flower petals, seedlings, rice, etc., and the target plants are not particularly limited.

For example, for paddy rice, even when seedlings are grown in a conventional flat-shaped seedling box and transplanted using a normal paddy rice transplanter, the so-called ma-soto strength is improved, and even in the case of thinly sown mature seedling transplants, the roots do not fall apart. There are Meri Soto methods that can prevent transplanting problems such as the soil becoming loose or the seedlings not maintaining their proper posture and position.

For vegetables, there is a growing momentum to develop transplanters for seedlings with soil (6), and they are beginning to become popular, but the present invention is also highly effective in making full use of their transplanting performance. It is.

Details will be illustrated in Examples below, but the present invention is not limited thereto.

Example (1) Preparation of culture soil As a base soil containing fertilizer, N = 1 per rice seedling box, which is commonly used in cold regions. Of, P2O5=2.01, K
20=1.7F, and the water content was 15 to 17%).

To 20Kt of this soil, 200g of each of the four types of acrylamide polymers listed below were added and mixed and stirred for about 5 minutes using a 60% concrete mixer to obtain four types of soil for raising seedlings. (1-IV) In addition, untreated R-shaped granular culture soil HJ to which no polymer was added was prepared. (v) (7) Table 181 In addition, in the lettuce test, the pH was adjusted to 6 with slaked lime,
Cultivating soil adjusted to Of was used.

(2) Lettuce test Prepare 5 paddy rice seedling boxes separated by plastic sheet partitions so that 20 x 10 = 200 small sections are used, and use 1 seedling box per potting soil.After adding soil, lettuce ( Variety G
L-54) seeds in each section (1 seed/1 section) 200
Seeds were sown one by one, lightly covered with soil and thoroughly watered, and then seedlings were raised in a greenhouse.

At the 8.0 to 8.5 leaf stage, the plants were watered appropriately in the morning and subjected to a drop test in the afternoon under moderately moist soil conditions.

From each section (by cultivator), 10 lettuce seedlings each with a root ball approximately 2.7 cm square, excluding the partition board inside the seedling box.
0 plants were randomly selected and allowed to naturally fall onto the ground from a height of 0.7 m with the root ball facing down, and strength was determined based on whether or not the root ball collapsed.

The results are shown in Table 2 below.
It can be seen that the plant II) has a strong root ball strength and is highly practical.

(9) @Table 2: Strength test results (8) Paddy rice test A total of 20 rice seedling boxes were used, and soil was filled in using the conventional method.
As a thin sowing of dry paddy weight 100 Da), after watering and covering soil, approximately 1
After several months, it was determined whether the so-called mat strength was sufficient.

The results are shown in Table 3, and it can be seen that the soil for raising seedlings of the present invention has no problem in rice planting at the stage of viable bacteria and mature seedlings when sown thinly.

In particular, in cold regions, there is a growing tendency to sow thinly and transplant mature seedlings (large seedlings), but the rice root chain is weak and the mat strength is insufficient. Results note) Plant height: 8.5 leaf stage - 19 feet, 4.5 leaf stage = 24 strokes 0: Good Δ: Slightly weak ×・
...Weak and hindering rice planting (11 completed) Procedural amendment (voluntary) July 25, 1980, 1988 Patent Master and Student No. 215955 2, Name of invention: Soil for raising seedlings 8, Person making amendment case・Patent applicant address 5-15 Kitahama, Higashi-ku, Osaka Name (
209) Sumitomo Chemical Co., Ltd. (1 idiot) Representative
Takeshi Hijikata 4, Agent 6, amend the detailed statement of amendment as follows.

(l) "Page 2" - "petal" in the second line is "hanaki".

(2) "20 mol%" in the 10th line from the top of page 3 is changed to "25 mol%".

(3) Page 5 1:6) et al.
5 mol%".

(4) Let “petal” in the 12th line from the top of page 6 be “hanaki”.

(5) Change "20" to "25" in the sodium acrylate content (mol%) column in the row of soil number for seedling raising (■) in Table 1 on page 8.

(6) lO'ff "Sprouting paddy for paddy rice (
``Paddy rice (variety Nipponbare)'' is defined as ``sprouted paddy of paddy rice (variety Nipponbare)''.

that's all 12 complete-

Claims (1)

[Claims] (1) A soil bag for raising seedlings, characterized in that it is made by mixing an acrylamide copolymer containing 0.01 to 25 mol% of repeating units represented by the following into soil. (2) Adding the acrylamide copolymer to the soil The soil for raising seedlings according to claim 1 contains 0.1 to 5 mol% of the repeating unit represented by the soil for raising seedlings according to claim 1, in which the added amount is 0.05 to 5% by weight. Soil for raising seedlings.