KR20000073328A - Method of inhibiting weeds from growing on a rice field - Google Patents

Abstract

PURPOSE: A method for controlling growth of the weeds in a rice field is provided, which can control the growth of the weeds effectively by dissolving, dispersing, or floating a composition for shutting the sun light into the water in a rice field. Unlike a weed killer, it doesn't pollute the environment. CONSTITUTION: The method for controlling growth of the weeds in a rice field is characterized in that: dispersing, or floating a composition including 0.1-90wt.% of at least one activating agent selected from the group of dyes, paints, and natural mineral material and 99.9-10wt.% of at least one dispersing agent selected from the group of organic acid metalate, alkyl naphtalene metalate, alkyl benzene sulphonate metalate, and dialkyl sulfosuccinate into the water in a rice field.

Description

Method of inhibiting weeds from growing on a rice field}

The present invention relates to a method for suppressing the growth of weeds in paddy fields. Specifically, an active substance capable of blocking or absorbing sunlight is added to a paddy field of freshwater lower than rice height for a certain period of time with a dispersion aid. The present invention relates to a method of physically inhibiting the growth of weeds in paddy fields by blocking or absorbing sunlight reaching the soil layer by dissolving, dispersing or floating.

At present, Korea's food self-sufficiency is relatively low, about 25%. Despite the low self-sufficiency of food, it is self-sufficient as rice, but the cultivation area of rice is decreasing year by year, so maximization of rice production per unit area is urgently needed. Therefore, in order to increase the production of rice, various modern breeding methods related to selection of rice varieties, production methods, fertilization, pest prevention, weeding, etc. are being mobilized. Mechanical weeding, pharmaceutical weeding, and the like have been tried in various ways, but still do not completely solve the problem of weeds.

Weeds take away the most nutrients (fertilizers), moisture, geothermal and water temperatures needed for rice to grow, and occupy land and space, preventing the proper distribution of air and the air needed for rice to grow, and obstructing sunlight for rice. It interferes with rice photosynthesis. In addition, lush weeds become habitats for various pests, causing rice to die.

There are 120 species of weeds in our rice fields, but there are about 20 kinds of weeds. Weeds are divided into annual weeds and perennial weeds.The annual weeds include blood, water cane, viburnum, Bangdongsan, mantis grass, bark flower, turfgrass, wild, needles, and crows, and perennial weeds , Moth, iron, sputum, peel, tadpole, mussels, pulp, beech, tadpoles, and duckweed.

Weeds in paddy fields vary according to soil conditions, climate, cultivation conditions, types of herbicides used, and migration methods every year, and various herbicides (chemicals) are commonly used to remove these weeds. .

However, herbicides include early herbicides, early and middle herbicides, medium and herbicides and late herbicides. Therefore, appropriate herbicides should be selected and used according to soil conditions, types of weeds developed, and cultivation styles. Care must be taken to achieve the desired effect, and only a single spray can not see the effective herbicidal effect has the problem that its use is complicated. In addition, some of the world's largest chemical companies with huge financial and R & D capabilities monopolize most of the herbicides on the market, which is expensive and inevitably paid and used in foreign currency. In addition, the use of herbicides creates resistance to weeds, results in weakening of rice, and causes serious problems that can accumulate and damage the soil.

Thus, the inventors have diligently studied, and weed seeds that normally dissolve, disperse, or float the active material that can block or absorb sunlight in rice fields lower than rice height for a certain period of time to grow and sprout rice on the surface of water. The present invention has been completed by discovering that it is possible to physically suppress the growth of weeds by preventing sunlight from reaching.

It is an object of the present invention to provide a method of physically blocking or absorbing sunlight reaching weeds growing under freshwater paddy fields to suppress the growth of weeds in paddy fields.

In order to achieve the above object, in the present invention, rice is grown in a composition containing an active substance and a dispersing aid that can block or absorb sunlight, and is applied to a paddy field of fresh water lower than rice height to be dissolved, dispersed or suspended. It provides a method for inhibiting the growth of weeds in Essaouira.

Hereinafter, the present invention will be described in more detail.

According to the present invention, the active material capable of blocking or absorbing sunlight may be selected from the group consisting of dyes, pigments, carbonaceous materials, natural minerals, soils and paraffins.

The dyes and pigments used in the present invention are milky white to black atomized water-soluble or water-dispersible dyes, and milky white to black inorganic or organic pigments, which are adversely affected or toxic to rice growth or are concerned about environmental degradation. Excluded. In particular, in the case of black dyes or pigments, it absorbs sunlight (especially hot rays) when dissolving, dispersing, or floating in paddy fields to raise the paddy's temperature by, for example, about 2 degrees, thereby promoting early growth of rice. Can be.

Carbonaceous materials used in the present invention include carbon black, white carbon, activated carbon, charcoal, ash, various soot, peat, lignite and graphite, and the like, and natural minerals include talc, kaolin, diatomaceous earth, clay and various stone powders. Can be mentioned. In particular, in the case of carbonaceous raw materials, when the remaining water in the rice paddy after harvesting becomes a good habitat of various effective microorganisms, it may bring about paddy soil improvement effect.

Furthermore, according to the present invention, as a dispersing aid, an organic acid metal salt, an alkyl naphthalene metal salt, an alkyl benzene sulfonate metal salt, an alkyl sulfate metal salt, a polyoxyethylene (POE) alkyl phenol sulfate metal salt, a POE alkyl aryl ether, a dialkyl sulfosuccinate Hydrophilic / wetting agents such as sorbitan fatty acid esters and paraffin sulfonates; Or POE alkyl aryl sulfate metal salts, ligno sulfonate metal salts, metal salts of naphthalene sulfonate condensates, alkyl naphthalene sulfonates, POE tristyryl aryl ethers, POE polyaryl phosphates, polyvinyl pyrrolidone, carboxymethylcellulose, dialkyldia Dispersible / dispersing agents such as minobetaine and POE alkyl ether sulfates can be used. This adjuvant is used in conjunction with the active substance to facilitate dissolution, dispersion or suspension of the active substance in the water of the active substance and serves to maintain this state for a certain period of time.

The composition according to the invention may comprise from 0.1 to 90% by weight of active substance and from 99.9 to 10% by weight of adjuvants, and may be uniformly applied to the field so as to have a dilution of 500 to 20,000 times.

In addition, the composition according to the present invention can be variously formulated into a hydrated form, a water soluble form, a liquid form, a powder form, an oil form, a granule form and the like by conventional methods according to the type and properties of the selected active substance.

Preferred formulations of the compositions according to the invention include mixtures of 10 to 90% by weight of fine carbon black powders and 90 to 10% by weight of adjuvants (hydrated); Mixtures consisting of 20 to 70% by weight of fine powder, 5 to 10% by weight of adjuvant and 30 to 60% by weight of water (liquid hydration type); A mixture (water-soluble) consisting of 0.1 to 99% by weight of a black dye and 99.9 to 1% by weight of an adjuvant; A mixture (liquid form) of 0.1 to 70% by weight of a dark brown dye, 1 to 5% by weight of adjuvants and 90 to 30% by weight of water; A mixture (powdered) consisting of 30 to 50% by weight of paraffinic calcium stearate, 5 to 10% by weight of adjuvants and 60 to 40% by weight of white carbon; Mixtures (oil type) consisting of 30 to 90% by weight of liquid paraffin, 70 to 10% by weight of auxiliaries and 1 to 5% by weight of oil-soluble dyes; Mixtures (grainen) consisting of 30 to 70% by weight of fine charcoal powder, 1 to 10% by weight of adjuvants, and 10 to 20% by weight of binders, granulating agents and diluents; And 10 to 80% by weight of carbon black, fine charcoal and black pigment, and 90 to 20% by weight of auxiliaries (starch and rice bran).

As described above, the method of the present invention can be applied to paddy fields filled with a depth of, for example, 5 to 20 cm, which is lower than the height of the seeded rice seedlings. If you want to apply the method according to the present invention, the seeded germinated seed germination and growth can be applied by selecting when the hair grows up to 3 to 10cm above the surface of freshwater paddy.

According to the method according to the present invention, an active substance capable of blocking or absorbing sunlight can be kept dissolved or dispersed in a paddy field for 5 to 30 days to economically and efficiently suppress weed growth. Unlike in use, it does not cause weakening of rice and chemical contamination of paddy water or groundwater.

Hereinafter, the present invention will be described in more detail based on the following examples. However, the following examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

Example 1

80% carbon black fine powder (20μ), 10% kaolin, 1% calcium lignosulfonate, 3% sodium lignosulfonate, 3% sodium naphthalene formaldehyde sulfonate and 3% sodium methylbenzene sulfonate After mixing and grinding%, add 10 liters of water to 3,000 g of this mixture to make a fine porridge, and add 190 liters of water to it and add the diluted mixture to rice paddy, uniformly in paddy fields with 300 pyeong. Input. After 10 and 20 days of inoculation, the incidence rate of each of the four types of weeds (flowers, roomworms, alleys and broadleaf) was measured and shown in Table 1 below.

Example 2

60% by weight fine powder (20μ), 3% by weight of sodium lauryl sulfate, 1% by weight of sodium dioctyl sulfosuccinate, 3% by weight of calcium lignosulfonate, 3% by weight of sodium polyacrylate and 30% by weight of water The mixture was added to paddy water in the same manner as in Example 1, except that the liquid mixture was used by mixing. After 10 and 20 days of inoculation, the incidence rate of each of the four types of weeds (flowers, roomworms, alleys and broadleaf) was measured and shown in Table 1 below.

Comparative Examples 1 and 2

After 20 days of filling the corresponding paddy fields with the paddy water which does not contain the respective mixtures prepared in Examples 1 and 2, the incidence rate of each of the four types of weeds (flowers, moths, ovals and broadleaf) was measured. It is shown in Table 1 below.

As can be seen from Table 1, according to the physical weed growth suppression method according to the present invention can be seen that can effectively reduce the weed generation rate irrespective of the soil conditions or the type of weeds.

According to the method for inhibiting weeding of the present invention, the light-blocking or light-absorbing composition can be maintained in a state of dissolving, dispersing or suspended for 5 to 30 days in a state of economical and efficient suppression of weed growth. Otherwise does not cause harmful to rice and chemical contamination of paddy or groundwater.

Claims (6)

A method of inhibiting weed growth in paddy fields by dissolving, dispersing, or suspending them by applying a composition containing an active substance and a dispersing aid capable of blocking or absorbing sunlight to a paddy field in a fresh water lower than rice height. . The method of claim 1, The active material is selected from the group consisting of dyes, pigments, carbonaceous materials, natural minerals, soils and paraffins. The method of claim 1, Auxiliaries include organic acid metal salts, alkyl naphthalene metal salts, alkyl benzene sulfonate metal salts, alkyl sulfate metal salts, polyoxyethylene alkyl phenol sulfate metal salts, polyoxyethylene alkyl aryl ethers, dialkyl sulfosuccinates, sorbitan fatty acid esters and paraffin sulfonates, Polyoxyethylene alkyl aryl sulfate metal salt, ligno sulfonate metal salt, metal salt of naphthalene sulfonate condensate, alkyl naphthalene sulfonate, polyoxyethylene tristyryl aryl ether, polyoxyethylene polyaryl phosphate, polyvinyl pyrrolidone, carboxymethyl At least one selected from the group consisting of cellulose, dialkyldiaminobetaines and polyoxyethylene alkyl ether sulfates. The method of claim 1, Wherein the composition comprises 0.1 to 90% by weight of active substance and 99.9 to 10% by weight of dispersion aid. The method of claim 1, The composition is characterized in that the formulation is a formulation selected from hydrated, water-soluble, liquid, powder, oil and granule form. The method of claim 1, A method of spraying or sprinkling a composition on paddy water so as to have a dilution concentration of 500 to 20,000 times.