WO2007119583A1

WO2007119583A1 - Liquid fertilizer for soil cultivation and method of cultivating crop

Info

Publication number: WO2007119583A1
Application number: PCT/JP2007/056788
Authority: WO
Inventors: Mitsuyuki Murakami; Masafumi Ikeda; Toshifumi Miyaura
Original assignee: Otsuka Chemical Co., Ltd.
Priority date: 2006-03-31
Filing date: 2007-03-29
Publication date: 2007-10-25
Also published as: KR101093581B1; CN101410350A; KR20080108456A; JPWO2007119583A1

Abstract

A liquid fertilizer for soil cultivation that realizes use of urea nitrate substantially not having been utilized as a fertilizer to date and attains exertion of strikingly enhanced fertilizer effects. There is provided a liquid fertilizer for soil cultivation comprising urea nitrate wherein the content of urea nitrate is in the range of 0.006 to 1.2 wt.%. By application of this liquid fertilizer for soil cultivation onto the soil surface and/or in the earth while avoiding direct contact with the leaves of germinating crops, crop cultivation can be carried out without phytotoxicity.

Description

Specification

Liquid fertilizer for soil cultivation and crop cultivation method

Technical field

[0001] The present invention relates to a liquid fertilizer for soil cultivation and a method for cultivating a crop.

Background art

[0002] The use of urea nitrate as a nitrogen fertilizer has been studied, but urea nitrate is a strongly acidic substance, and when it is used in the form of powdered, massive, or other solid urea nitrate, it is in contact with crops. It has not yet been put to practical use because it causes chemical damage.

[0003] Patent Document 1 suggests that an aqueous solution of urea nitrate is used as a foliar treatment agent. However, when urea nitrate is treated on the foliage of crops, it causes phytotoxicity. Therefore, urea nitrate is actually effectively used as a fertilizer.

Patent Document 1: Japanese Patent Laid-Open No. 11-158010

Disclosure of the invention

Problems to be solved by the invention

[0004] An object of the present invention is to provide a liquid fertilizer for soil cultivation that enables the use of powerful urea nitrate that has not been practically used as a fertilizer to date, and that can exhibit a significantly superior fertilizer effect. It is.

Means for solving the problem

[0005] The present inventors apply powerful urea nitrate, which has not been practically used as a fertilizer component, to a rhizosphere region (ground surface and Z or underground) of germinated crops at a specific concentration. As a result, it was found that the fertilizer effect can be further improved compared to the nitrogen fertilizers that are usually used without causing chemical damage. The present invention has been completed based on such findings.

[0006] The present invention provides a liquid fertilizer according to items 1 to 3 below and a method for cultivating a crop according to item 4.

Item 1. A liquid fertilizer containing urea nitrate and having a urea nitrate content of 0.006 to 1.2% by weight. Item 2. The fertilizer according to Item 1, wherein the urea nitrate content is 0.01 to 1% by weight.

Item 3. The fertilizer according to Item 2, wherein the urea nitrate content is 0.03 to 0.8% by weight.

Item 4. Cultivation of crops in which the liquid fertilizer for soil cultivation is applied to the leaves of germinated crops! Method.

[0007] In the present specification, the crop means all crops for agriculture and horticulture that have been conventionally cultivated, and examples thereof include vegetables, fruit buds, flower buds, and foliage plants.

[0008] The liquid fertilizer for soil cultivation of the present invention is a liquid fertilizer obtained by dissolving urea nitrate in water.

[0009] As urea nitrate, industrially produced urea nitrate can be widely used, and it can be used regardless of the shape such as powder, granule, lump, etc., but the subsequent solubility in water In view of this, it is preferable to use powdered or granular urea nitrate.

[0010] The urea nitrate content in the liquid fertilizer of the present invention is usually 0.006 to 1.2% by weight, preferably 0.

01 to 1 weight. / ₀ , more preferably 0.03-0.8% by weight.

[0011] When applied to crops, the liquid fertilizer of the present invention having the above urea nitrate concentration is used.

[0012] Urea nitrate may be circulated as a solid substance such as powder, granules or lumps, or urea nitrate may be circulated as a high-concentration liquid substance dissolved in, for example, about 1 to 20 times water. Occasionally, the liquid fertilizer of the present invention is prepared by adding water so as to have the urea nitrate content described above and dissolving or diluting.

[0013] Other fertilizer components can be appropriately mixed with the liquid fertilizer for soil cultivation of the present invention, and these mixtures can also be used as a composite fertilizer.

Here, the other fertilizer components are not particularly limited as long as they are usually used as fertilizer components. The blending ratio can be appropriately selected from a wide range according to the target crop, growth state, and the like.

[0015] Fertilizer power blended as other ingredients Even if it is poorly water-soluble, such as calcium phosphate, it can be easily dissolved in water when combined with urea nitrate and can be used as a liquid fertilizer become.

[0016] In using the liquid fertilizer for soil cultivation of the present invention, it is applied to the ground surface and Z or in the ground (in the soil) so that the leaves of the germinated crop have no strength.

[0017] Specifically, it is preferable to apply the liquid fertilizer for soil cultivation of the present invention to crop stocks. Yes. If the liquid fertilizer of the present invention is strong on the leaves of germinated crops, the risk of causing phytotoxicity, which has been a problem in the past, is increased.

[0018] As a method of application, known methods can be widely applied as long as the method does not apply the liquid fertilizer force of the present invention to the leaves of germinated crops. For example, irrigation treatment method, soil irrigation method, drip tube or irrigation The method of using a tube etc. are mentioned.

[0019] Although the liquid fertilizer of the present invention is applied to the plant stock of the crop, it is preferably applied to the root zone of the crop. It is particularly preferable to irrigate the root zone of the crop using an infusion tube or a irrigation tube. preferable.

[0020] The pre-emergence treatment of the crops results in suppression (inhibition) of germination, or even when germination occurs, the nitric acid urea component comes into contact with the bud, causing damage to the bud and causing growth delay or death. This is inadequate because of the disadvantages.

[0021] The liquid fertilizer of the present invention is excellent in application to soil cultivation. The soil cultivation method is simply a cultivation method using soil as a medium, and includes a hydroponic soil cultivation method using soil as a support. The reason why the application to the soil cultivation method is preferable is that the soil is buffered against the acidity of urea nitrate because it is supplied to the crop through the soil. The invention's effect

[0022] According to the present invention, it is possible to use urea nitrate, which has not been practically used as a fertilizer to date, and to exhibit a significantly superior fertilizer effect.

BEST MODE FOR CARRYING OUT THE INVENTION

[0023] Hereinafter, the present invention will be described more specifically with reference to Examples and Test Examples, but the present invention is not limited thereto.

[0024] Example 1

Urea nitrate was dissolved in water to prepare aqueous solutions with total nitrogen concentrations of 140 ppm, 280 ppm and 420 ppm. For comparison, urea was dissolved in water to prepare an aqueous solution with a total nitrogen content of 140 ppm.

[0025] A cultivation test was conducted using Komatsuna "Natsu Rakuten" (Takii Seed Co., Ltd.). The test period was 24 days from the beginning of January to the beginning of December. Fill a Neubauer pot (inner diameter 11.3 cm, height 6.5 cm) with 500 ml of soil (Kumiai Aina No.1, manufactured by Katakura Chikkarin Co., Ltd.) Each prepared urea nitrate aqueous solution or urea aqueous solution was added so that the soil water content was 50 to 60%. 20 pots of Komatsuna seeds were sown in each pot, and the surface of the ground was sprinkled with rain dew as needed. After germination and cotyledon development, each urea nitrate aqueous solution and urea aqueous solution (20-50 mlZ days) were applied to the ground surface with rain dew as the center of the strain, so that the leaves could be used.

[0026] The number of germination was counted 6 days and 12 days after sowing, and the germination rate (ratio of germination number to sowing number) was determined. In addition, the leaf length was measured 20 days after sowing, and the leaf length and fresh weight per 5 strains were measured 24 days after sowing. The tests were conducted in triplicate, and the average value of each test result was obtained and shown in Table 1.

[0027] [Table 1]

[0028] From the above results, it can be seen that by applying urea nitrate aqueous solution to the stockholder, the total nitrogen amount without causing phytotoxicity can exhibit a fertilizer effect of 1.2 times or more compared to the same urea. Recognize.

[0029] Comparative test

Urea nitrate was dissolved in water to prepare aqueous solutions with total nitrogen concentrations of 140 ppm, 280 ppm and 560 ppm.

[0030] A cultivation test was performed using Komatsuna "Natsu Rakuten" (Takii Seed Co., Ltd.). The test period was 14 days from late October to early November. A Neubauer pot was filled with 500 ml of cultivated soil (Kumiai Mana No. 1, manufactured by Katakura Chikkarin Co., Ltd.), and water was added so that the soil moisture in the pot would be 50-60%. Each pot was seeded with 20 komatsuna seeds and irrigated with the aqueous urea nitrate solution prepared above. After germination, urea nitrate aqueous solution was applied using rain dew so as to force the leaf surface from above. [0031] Five days after sowing, the number of germinations was counted to determine the germination rate. In addition, the state of phytotoxicity was visually observed 14 days after sowing. In addition, the test was carried out in a triple regime, and the germination rate was calculated as an average value and shown in Table 2.

[0032] [Table 2] Germination rate (¾) Chemical damage status

140ppm 5 3 Growth is suppressed, and leaf surface is whitened.

Nitrate urea 280 door 5 8 Significant inhibition of growth and whitening on leaf surface.

560ppm 5 3 Significant growth inhibition, whitening of leaves, and part of the outer edge are dead.

Claims

The scope of the claims

[1] A liquid fertilizer containing urea nitrate and having a urea nitrate content of 0.006 to 1.2% by weight.

[2] The fertilizer according to claim 1, wherein the urea nitrate content is 0.01 to 1% by weight.

[3] The fertilizer according to claim 2, wherein the urea nitrate content is 0.03 to 0.8% by weight.

[4] The liquid fertilizer for soil cultivation according to any one of claims 1 to 3 is applied to the ground surface and Z or to the ground so as not to force the leaves of the germinated crop. Cultivation method.