JP2005139009A - Vesicular arbuscular mycorrhizae-containing slow-release fertilizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vesicular arbuscular mycorrhizae-containing fertilizer for a seedling nursing medium effective for the production of seedlings in the agricultural and horticultural fields. <P>SOLUTION: In the vesicular arbuscular mycorrhizae-containing slow-release fertilizer for the seedling nursing medium, the weight ratio of the vesicular arbuscular mycorrhizae to the slow-release fertilizer is (10 to 90):(90 to 10). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a slow-acting fertilizer containing VA mycorrhizal fungi for seedling culture media that is effective for seedling production in the fields of agriculture and horticulture.

  When producing pot seedlings, the seedling medium contains granulated granular soil, peat moss with excellent water and fertilizer, vermiculite with good water permeability and air permeability (Patent Document 1), and fertilizer as a nutrient source The one (Patent Document 2) is generally used.

However, only the fertilizers used in conventional seedling culture media do not give nutrients uniformly to the plant, resulting in nonuniformity in the growth rate of the seedlings between pots, at a time when it conforms to the product standards of the seedlings above ground. There is a problem that a time lag occurs, the product cannot be shipped efficiently, and productivity does not increase.
JP-A-9-65758 JP 2000-265471 A

  The present invention aims to make the growth rate of the seedlings between pots uniform in order to overcome the disadvantages of such conventional fertilizers for seedling culture media.

  As a result of intensive studies, the present inventors have found that a slow-acting fertilizer containing VA mycorrhizal fungi used for a seedling culture medium is used instead of the conventional fertilizer used for the seedling culture medium, and that the purpose is met. The present invention has been reached.

  That is, the present invention relates to a VA mycorrhizal fungus-containing slow-release fertilizer containing VA mycorrhizal fungi for a seedling culture medium, in a weight ratio of VA mycorrhizal fungus and slow-release fertilizer, VA mycorrhizal fungi: slow-release fertilizer = 10-90: 90- The present invention provides a slow-acting fertilizer containing VA mycorrhizal fungi characterized in that it is 10.

  When the slow-acting fertilizer containing VA mycorrhizal fungi according to the present invention is used as a seed fertilizer for raising seedlings for mass production of pot seedlings, the uniformity of the growth rate between pots is increased, so that the size of the seedling above-ground part at the time of pot seedling shipment is increased. It is suitable for improving seedling productivity for agriculture and horticulture. For example, in the growth test of pansy seedlings in cell pots, by applying a slow-release fertilizer containing VA mycorrhizal fungi, the variation in the growth rate between pots is reduced, and the percentage of good stocks at the time of pot seedling product shipment (seedlings) A remarkable effect was observed in that the rate of satisfying a certain standard of the above-ground stock width was increased.

  The slow-acting fertilizer containing VA mycorrhizal fungi for the seedling culture medium of the present invention is composed of VA mycorrhizal fungi: slow-acting fertilizer = 10-90: 90-10, more preferably, by weight. 30-70: It consists of 70-30. However, when mixed in a seedling culture medium, if the amount of VA mycorrhizal fungi is less than 10%, the effect of VA mycorrhizal fungus is not preferable, and the mixing ratio needs to be increased. On the other hand, when the amount of VA mycorrhizal fungi is more than 90%, the fertilizer content is reduced, which is not preferable because variation in growth between pots is observed.

  Next, the function of VA mycorrhizal fungi will be described. VA mycorrhizal fungi are endophytic fungi that enter the cells of the plant, live in the roots of the plant, work to promote absorption of phosphate, etc. through the mycelium that stretches outside the roots, and the growth of the plant It has functions such as promotion of plant resistance, imparting resistance to pathogens, and assisting in water retention of plants. Moreover, it is a symbiotic microorganism that obtains nutrients necessary for the growth of fungi from plants.

  From this, when the slow-acting fertilizer containing VA mycorrhizal fungi is applied to seedlings such as pot seedlings, after the symbiosis is established within 2 to 3 weeks of application, the nutrients required by the plant are several tens to several Continue to feed nutrients from the fertilizer through mycelium stretched 100 times. By utilizing the functions of VA mycorrhizal fungi and smoothly promoting the supply of nutrients to the plant roots, it overcomes the disadvantages of conventional seedling culture media and ensures uniform growth of seedlings between pots. Was able to achieve.

  The VA mycorrhizal fungi that can be used here are: Acaulospora sp., Entrophospora sp., Gigaspora sp., Glomus sp., Sclerocist, Sclerocist Or it is the genus Scutellospora (Scutellospora sp.).

Moreover, as a slow release fertilizer which can be used, general slow release fertilizers, such as a hardly soluble fertilizer and a coated fertilizer, can be used. However, considering environmental pollution to rivers and animals and plants due to the loss of fertilizer components and effective utilization of resources, etc., slow-release nitrogen fertilizer and slow-release phosphate fertilizer magnesium ammonium phosphate (MgNH ₄ PO ₄ .H ₂ O) A fertilizer mainly composed of magnesium potassium phosphate (MgKPO ₄ · H ₂ O), which is a slow-release potassium fertilizer, is desirable. Since the fertilizer dissolves in accordance with the growth of the plant, the loss of the fertilizer component is extremely small, and it is suitable in terms of preventing environmental pollution to rivers and animals and plants and conserving resources.

  Hereinafter, the present invention will be described in detail by way of examples. However, the present invention is not limited to the examples.

Examples 1-13, Comparative Examples 1-6
Examples 1 to 5 and Comparative Examples 1 to 4 were supplied to a 128-hole plug tray (22 ml / hole), and Examples 6 to 13 and Comparative Examples 5 to 6 were supplied to a 288-hole plug tray (9 ml / hole). Fill with mixed soil of test soil and test fertilizer. One seed each of the test plant was sown on this, and a cultivation test was conducted at room temperature. The test conditions are shown in Tables 1 and 2, and the results are shown in Table 3. The slow-acting fertilizer Magamp K (product of Hyponex Japan) is a solid solution of magnesium ammonium phosphate (MgNH ₄ PO ₄ · H ₂ O) and potassium potassium phosphate (MgKPO ₄ · H ₂ O). The fertilizer composition is 6 (N) -40 (P) -6 (K) -15 (Mg). The test soil is a mixture of vermiculite and adjusted peat moss with a volume ratio of 1: 1. It consists of ~ 45% and bark ash 12-18%. VA mycorrhizal fungi are genus Gigaspora and Glomus, and were prepared with fine particles of zeolite soil conditioner. The good stock rate is determined based on whether or not the size of the above-ground part (leaves) satisfies a certain standard value, and the determination criteria are shown in Table 3.

Claims (1)

In the slow-acting fertilizer containing VA mycorrhizal fungus for growing seedling medium, the weight ratio of VA mycorrhizal fungus and slow-acting fertilizer is VA mycorrhizal fungi: slow-acting fertilizer = 10-90: 90-10 A slow-acting fertilizer containing VA mycorrhizal fungi.