JPS6148495A - Agricultural oxygen supplier - 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 an oxygen supplying agent useful for agriculture, particularly for direct sowing cultivation in flooded soil.

<Prior Art> Conventionally, as an oxygen supplying agent for agricultural use, especially an oxygen supplying agent used for direct sowing cultivation in submerged soil, there has been known one containing calcium peroxide as a product. 2875
(No. Publication) This product is used as a flour coating for paddy rice seeds. (Commercially available Calper powder: Hodogaya Chemical Industry Co., Ltd. product) These are obtained, for example, by reacting hydrogen peroxide with a calcium compound such as slaked lime. In addition, a magnesium compound and/or a silicate compound selected from magnesium hydroxide and magnesium oxide are added to the obtained calcium peroxide for the purpose of improving stability during storage, and in order to eliminate various practical inconveniences. , sometimes used as granules. (Special Publication No. 54-7684)
On the other hand, in the production reaction of calcium peroxide, sodium monosilicate and magnesium salts may be used to suppress side reactions in the reaction. (% Kosho 53-2
(Publication No. 3279) <Problems to be solved by the invention> Currently, the mainstream of wet rice cultivation is the transplant cultivation method.
In this method, the nursery box for transplanted seedlings has a diameter of approximately 2
0 boxes are required. In order to produce these transplanted seedlings, it is necessary to set up appropriate seedling-raising facilities and secure soil for cultivation in advance, and the management of the seedlings requires long-term and complicated work, which requires a great deal of cost and labor. The reality is that this is hindering efforts to reduce rice production costs, which is the most important issue.

On the other hand, direct sowing cultivation in flooded soil is expected to be a cultivation method that can save costs and labor because it is rice cultivation without raising seedlings, but instability in germination and seedling establishment rate is a major obstacle to ensuring stable yields. It has become. Therefore, in this cultivation method, supplying oxygen into the soil to stabilize the germination and seedling establishment rate is an important issue.

In addition, although the known A-supplying agents have been improved in terms of stability during storage and suppression of side reactions during production, weather and soil conditions are important for stabilizing the germination and seedling rate of paddy rice. However, depending on the cultivation conditions, satisfactory effects are not always achieved.

Means for Solving the Problems> The present invention provides a mixture of magnesium compounds such as magnesium oxide, magnesium hydroxide, magnesium carbonate, and lightly calcined magnesia as slaked lime, quicklime, and calcium carbide within a specific molar range. This is an agricultural oxygen supply agent whose active ingredient is a solid substance made into peroxide by the action of hydrogen peroxide. This improves germination and seedling establishment rates, and enables stable direct sowing cultivation in flooded soil.

and calcium oxide with a molar ratio of 0.1:9.9-2
This is an agricultural oxygen supplying agent characterized in that the active ingredient is a solid substance obtained by mixing the mixture in such a manner that:

The agricultural oxygen supply agent of the present invention can be generally produced by the following wet method.

Mix at a molar ratio of 0.1:9.9 to 2:8, preferably 0.25:9.75 to 1.5:8.5, and add water as necessary to make a slurry. and 30-90℃
, preferably #: 1:30 at a temperature of 50 to 70°C under stirring.
The product is produced by dropping a stoichiometric amount to about 90% of a stoichiometric amount of hydrogen peroxide solution having a weight of ~70 Ik, followed by drying at 95 to 130° C. for 1 to 2 hours in the case of standing to dry.

Also, if the hydrogen peroxide is concentrated, it can be combined with quicklime.
It can also be produced by a dry method.

Magnesium compounds used in the present invention include magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium chloride, magnesium sulfate, magnesium nitrate, silicate magnesium, light burnt magnesia or light burnt magnesia analogues, and silicon oxide. 3-9% as silicic anhydride or silicate, 0.0% as aluminum oxide or aluminum salt other than α-type aluminum oxide.
3-3% and 0.0% iron oxide as ferric or ferric oxide.
Examples include those containing 1 to 1 chloride, or mixtures thereof, and among them, baked magnesia or its analogues are preferred.

These magnesium compounds can be used for industrial purposes and fertilizers, and those with high solubility can be dissolved in water, and those with low solubility can be used by dry or wet grinding.

Further, examples of the calcium compound include slaked lime, quicklime, calcium carbonate, calcium silicate, calcium chloride, and mixtures thereof, with slaked lime and quicklime being preferred.

These calcium compounds can be used for industrial purposes or fertilizers, and may be in the form of powder or milk. The powder form should be as fine as possible (preferably one with a size of 840μ or less).In addition, these calcium compounds can be used in combination with other metal compounds such as iron, copper, manganese,
It is desirable to use a material that contains little chromium or the like.

The agricultural oxygen supply agent of the present invention thus obtained is
It can be used for direct sowing cultivation of paddy rice in flooded soil, as an addition to seedling beds for transplant cultivation, and even for cultivation of other crops.It can be applied around the seeds, for example, it can be applied to the seeds as a powder. It can be used by coating and sowing seeds, by applying it to the soil at the same time as sowing, or by putting it in water. The agricultural oxygen supply agent of the present invention is a solid substance, but it can also be used as a slurry by suspending it in water. It can be mixed with various auxiliary agents such as fixing agents and used as granules and seed dressings.

Although the amount of the agricultural oxygen supply agent of the present invention cannot be generally specified due to differences in weather conditions, soil conditions, drug form, application time, application method, target crop type, etc., For direct sowing, the effective oxygen concentration is generally 7-8%, 0.8-1.2 g per gram of seed.

The agricultural oxygen supply agent of the present invention can be used in combination with agricultural chemicals such as various fertilizers, herbicides, and fungicides, and can also be used in combination with gibberellin and vitamin B! Even better effects may be obtained when mixed or used in combination with germination promoters such as.

<Example> Production example 1゜32 mesh calcium hydroxide (reagent grade 1) 74
．． 1 g and 2.1 g of magnesium oxide (first class reagent) were mixed (MgO:CaQ molar ratio = 0.5: 9.5
) Water was added to it to make a 25-chi slurry. Then,
The mixture was heated to 50° C., and 92 g of 35% hydrogen peroxide solution was added dropwise to the stirring stopper to cause a reaction. Continue stirring for 20 minutes after dropping.
Thereafter, the product was filtered and dried at 105° C. for 1 hour to obtain 75.1 g of the target solid peroxide.

Production Example 2゜77.2 g of slaked lime powder (Ca072.61) and 4.4 g of lightly calcined magnesia (C-Mg080.8
0: CaO molar ratio = 0.8: 9.2) mixed,
Water was added to make a 25% slurry. Next, the mixture was heated to 50° C., and 100.411 Lt of 35% hydrogen peroxide solution was added dropwise to the stirring stopper to cause a reaction. After the dropwise addition, stirring was continued for 10 minutes, and then the product was filtered and dried at 105°C for 1 hour to obtain 74.5g of the desired solid peroxide.

Test Example Preparation Example 1. The effective oxygen concentration of the peroxide obtained in step 1 was analyzed, and the effective oxygen concentration was adjusted by adding calcined gypsum to 7.5 cm, which was used as a powder coating.

1/5. OOO earl wagner botto, ta±4
．． 0 kg, ammonium sulfate 2.5 g, ammonium sulfate 3.0 g, and potassium sulfate 1
．． Packed with a uniform mixture of 0g, water depth 10111L
It was assumed to be in a flooded state. Then, an equal amount of rice seeds (variety: Nipponbare, pigeon-breasted paddy) were coated with the above-mentioned powder coating agent, and 100 seeds were sown under IQix in the soil. Number of germination and number of 21,100 seedlings on days 5, 7, 9, and 12 after sowing,
We investigated the plant height of 1 pilot and obtained the results shown in Table 1. In addition, as a control group, the above-mentioned Production Example 1. A test was conducted using a peroxide obtained in the same manner as above except that magnesium oxide was not mixed therein, and a powder coating obtained in the same manner as above. still,
The pots were placed in a greenhouse for cultivation management, and the temperature during this period was a minimum of 11°C and a maximum of 25°C.

Table 1 * Plant height and root length are expressed as an index with the control plot set as 100.

Test Examples 2 to 36 Manufacturing Example 2. The peroxide obtained in 2. or the above production example or 2. The peroxide which had been oxidized in the same manner as in the method of Test Example 1. The test was conducted in the same manner as above, and the results shown in Table 2 were obtained.

Table 2 Note) Comparison group Ali without powder coating Comparison group 2: Commercially available "Calper powder" (product of Hodogaya Chemical Industry Co., Ltd.) was used Comparison group 3: Special Publication No. 53-23279, Example 3 [Table 3 Comparative section 4: Japanese Patent Publication No. 54-7684, Example 4 using 40.8 ml of MgSO + 5.2 ml of water glass as a stabilizer.
Corresponding Test Example 37 In place of the light calcined magnesia of Test Example 2, a light calcined magnesia-like composition prepared using the test system 1 grade described in Section 3 below is used, and MgO/CaO Molar ratio 0.8/
The test was conducted in the same manner as in Test Example 2 except that 9.2 was changed to 0.9/9.1, and the results shown in Table 3 were obtained.

Table 3 <Effects of the Invention> As is clear from the above examples, a magnesium compound and a calcium compound are mixed in advance, and Mg
When using an agricultural oxygen supplying agent of the present invention in which the O/cao molar ratio is within a specific range and using this as a peroxide, the emergence rate, emergence rate, plant height and The growth of the captain etc. is extremely good. In particular, when lightly calcined magnesia is used as the magnesium compound, excellent effects are exhibited. These young fruits are particularly suitable for direct sowing cultivation of paddy rice in flooded soil.

Patent applicant: Ishihara Fertilizer Industry Co., Ltd. -5 to 7-

Claims (1)

[Claims] 1. A magnesium compound and a calcium compound are mixed in a molar ratio of 0.1:9.9 to 2:8 as magnesium clay or restricted soluble magnesium clay and calcium oxide, respectively. An agricultural oxygen supply agent characterized in that the active ingredient is a solid substance obtained by converting a mixture into peroxide using hydrogen peroxide. 2. The agricultural oxygen supply agent according to claim 1, wherein the magnesium compound is lightly calcined magnesia.