CN112919956B - Asteris sinica water culture nutrient solution, application thereof and preparation method of concentrated nutrient solution - Google Patents

Abstract

The application provides a star point wood water culture nutrient solution which comprises metal inorganic salt, organic salt, a root growth promoter, a nitrogen fertilizer and a boric fertilizer, wherein the metal inorganic salt comprises calcium nitrate tetrahydrate, potassium dihydrogen phosphate, magnesium sulfate heptahydrate, ammonium sulfate, ferrous sulfate heptahydrate, manganese sulfate tetrahydrate, copper sulfate heptahydrate, zinc sulfate heptahydrate and ammonium molybdate tetrahydrate; the content of the calcium nitrate tetrahydrate is more than that of the monopotassium phosphate, the content of the copper sulfate heptahydrate and the content of the zinc sulfate heptahydrate are less than that of the manganese sulfate tetrahydrate, and the root promoting agent comprises 6.4-9.6mg of indolebutyric acid and 1.28-1.92mg of naphthylacetic acid; the organic salt is EDTA, the content of the EDTA is the same as that of the ferrous sulfate heptahydrate, and the EDTA and the ferrous sulfate heptahydrate react to obtain the chelated iron. The star point wood hydroponic nutrient solution can promote the increase and growth of a new root system and realize the conversion from a soil culture or matrix culture root system to a hydroponic root system in a short time. The application also provides a preparation method and application of the star point wood water culture nutrient solution and a preparation method of a concentrated nutrient solution.

Description

Asterina sinica water culture nutrient solution, application thereof and preparation method of concentrated nutrient solution

Technical Field

The application relates to the technical field of hydroponic nutrient solutions, in particular to a star anise hydroponic nutrient solution and application thereof and a preparation method of a concentrated nutrient solution.

Background

Ramulus et folium Psychotriae Rubrae, and Polyporus frondosus of Agavaceae. The star point wood has upright plants, the plant height can reach 1 meter, the leaves are opposite or 3 leaves are recurrent, the ellipse is needle-shaped or long oval, the leather is leathery, the long oval is full, the leaf has a short handle, the leaf color is dark green, the leaf surface is distributed with a plurality of milky yellow or milky small spots, the shape is like the star point, and the star point wood is famous for the shape; the star point wood blooms in summer, has a general inflorescence and a fragrance, and small flowers are long and cylindrical, and can form red berries after flowers bloom; the plant height is different, and the plant is upright. The star point wood is a shade-tolerant plant, but grows slowly under weak light, and new leaves are not easy to grow. Since star point wood is not suitable for direct outdoor strong light and fears low temperature below 13 ℃, the star point wood is not suitable for outdoor cultivation, can not winter in the open field in the north and is most suitable for indoor cultivation. It is preferable to choose a bright place because the bright place will make the leaf color brighter and the star point will be more obvious. The leaves are very beautiful, can be used for cluster planting or pot planting in a garden, and are also excellent flowers commonly used for flower arrangement.

The star point wood is a plant with good color matching for landscaping, and has strong color matching effect because the leaves are dark green and a plurality of milky yellow or milky small spots are distributed on the leaf surfaces. Traditional potted plant plants mainly utilize mixed matrix to go on, and this kind of planting mode growth rate is slow, and fertilization number of times is many every month, plants for a long time because the interior matrix board of basin knot and salinization can lead to vegetation bad, and plant growth potential difference, blade lose the gloss, and the sight reduces.

The nutrient solution culture mode in the soilless culture can well solve the defects of matrix culture, reduce the work of replacing the matrix, make the trimming management of the root system convenient and easy, supplement the nutrient deficiency in the culture in time, and reduce the links of fertilization, watering, transplanting and the like in the culture management. The soilless culture water culture technology can be used for realizing the cleanness of ornamental plant culture, convenient management and expansion of the plant planting area. Compared with the traditional soil cultivation or matrix cultivation, the soilless culture water cultivation method has the advantages that the soilless culture water cultivation method is light in weight, reasonable in design and capable of being used for three-dimensional planting on stone walls and wall bodies by matching with a proper container, the planting region of plants is enlarged, the three-dimensional greening design of tall buildings is realized, air pollutants are reduced, and the construction of ecological environment-friendly cities is really realized.

The water culture of the star point wood by using the traditional common broad-spectrum nutrient solution can cause the phenomena of the color spot degeneration of basal leaves, the fast falling of leaves, the slow growth and the small quantity of root systems, and the like, which are caused by the condition that the proportion of nutrient substances is not suitable for the growth of plants. Therefore, the research of a special nutrient solution formula suitable for growth of the asteriscus chinensis is a key technology for realizing water culture. Meanwhile, the special nutrient solution and the special rooting nutrient solution formula for the star point wood are developed, the rapid growth (about 30 days) of seedling root systems is realized, the planting of the water planting star point wood is popularized and enters families, office places, factories, stone walls and places with poor wall body illuminance, and the ecological city has great application prospect.

Disclosure of Invention

The application aims to provide the star point wood water culture nutrient solution, which can promote the growth of roots, stems and leaves of the star point wood, particularly increase the number of new roots and the length of the roots, realize the short-time conversion from a soil culture or a matrix culture root system to a water culture root system, and ensure that the star point wood reforms a complete and robust plant suitable for water culture.

The applicant of the application finds in research that the asteriscus asteroides is upright, the plant height can reach 1 meter, the plants are in pairs or 3-leaf rotation, the leaves are in needles or long ovals in the shape of ellipse, leathers and long ovals, the whole plant is complete, the plant has short handles and dark green leaves, a plurality of milky yellow or milky small spots are distributed on the leaf surfaces, the growth is slow, and a nutrient solution meeting the characteristics of the plant needs to be found to promote the growth of roots, stems, branches and leaves of the plant, so that the plant can be converted from a soil culture or matrix culture root system to a water culture root system in a short time. Through research and exploration, the star point wood water culture nutrient solution is provided, the growth of root systems can be promoted in a short time, branches and leaves grow vigorously, and leaf shapes are uniformly distributed and attractive. The star point wood water culture nutrient solution comprises metal inorganic salt, organic salt, a root promoting agent, a nitrogen fertilizer and a boron fertilizer, wherein the metal inorganic salt comprises calcium nitrate tetrahydrate, potassium dihydrogen phosphate, magnesium sulfate heptahydrate, ammonium sulfate, ferrous sulfate heptahydrate, manganese sulfate tetrahydrate, copper sulfate heptahydrate, zinc sulfate heptahydrate and ammonium molybdate tetrahydrate; the content of the calcium nitrate tetrahydrate is more than that of the monopotassium phosphate, the content of the copper sulfate heptahydrate and the content of the zinc sulfate heptahydrate are less than that of the manganese sulfate tetrahydrate,

the root promoting agent comprises 6.4-9.6mg of indolebutyric acid and 1.28-1.92mg of naphthylacetic acid;

the organic salt is EDTA, the content of the EDTA is the same as that of the ferrous sulfate heptahydrate, and the EDTA and the ferrous sulfate heptahydrate react to obtain the chelated iron.

The star point wood water culture nutrient solution realizes the growth promotion of roots, stems, branches and leaves in a short time, particularly the increase of the number of new roots and the increase of the length of the roots by strictly controlling the respective contents of metal inorganic salt, organic salt, nitrogen fertilizer, boron fertilizer and root growth promoting agent. Specifically, the metal inorganic salts comprise calcium nitrate tetrahydrate, potassium dihydrogen phosphate, magnesium sulfate heptahydrate, ammonium sulfate, ferrous sulfate heptahydrate, manganese sulfate tetrahydrate, copper sulfate heptahydrate, zinc sulfate heptahydrate and ammonium molybdate tetrahydrate, various metal salts are provided to meet the growth requirements of roots, stems and leaves of the asteriscus scaber, and the used compounds have good solubility and can avoid a large amount of sediment accumulation in a soilless culture planting slot; meanwhile, the manganese content is higher than the contents of copper and zinc, so that the situation that the manganese absorption of leaves of the asteriscus scaber can be inhibited due to the fact that the contents of copper and zinc are too high is avoided, and the color of the leaves is improved. The content of the calcium nitrate tetrahydrate is greater than that of the potassium dihydrogen phosphate, so that the phenomenon that the absorption of the star point wood to the N is inhibited due to the fact that the content of the P is too high is avoided. The organic salt is EDTA, the content of the EDTA is the same as that of the ferrous sulfate heptahydrate, the EDTA and the ferrous sulfate heptahydrate react to obtain chelated iron, and the EDTA can enable iron ions to form a stable water-soluble iron complex, so that the phenomenon that the iron ions form precipitates due to other factors, the absorption of iron elements is influenced, and iron deficiency is avoided. In addition, the content of indolebutyric acid (1-2mg) and naphthylacetic acid (0.3-0.5mg) in the water culture nutrient solution of the asterias is controlled to be 6.4-9.6mg, and the content of indolebutyric acid and naphthylacetic acid is controlled to be higher than that of indolebutyric acid (1-2mg) and naphthylacetic acid (0.3-0.5mg) in a common plant, because the cell walls of the asterias have larger gaps, the indolebutyric acid and the naphthylacetic acid are adsorbed in the gaps, the growth of the asterias can be supplied after the gaps are filled, the better growth cannot be supplied when the content is too low, and the growth can be inhibited when the content is too high. Meanwhile, the content of indolebutyric acid is controlled to be higher than that of naphthylacetic acid, indolebutyric acid can induce the formation of a root pathogen, promote cell differentiation and division, facilitate the generation of new roots and the differentiation of a vascular bundle system, and promote the formation of adventitious roots of cuttings.

Further, the weight ratio of the indolebutyric acid to the naphthylacetic acid is 5.

Further, the nitrogen fertilizer is urea.

Further, the boric fertilizer is boric acid.

Further, the content of the calcium nitrate tetrahydrate is 780-1152mg, the content of the monopotassium phosphate is 512-768mg, the content of the magnesium sulfate heptahydrate is 288-432mg, the content of the ammonium sulfate is 64-96mg, the content of the urea is 40-60mg, the content of the ferrous sulfate heptahydrate is 16-24mg, the content of the EDTA is 16-24mg, the content of the boric acid is 1.6-2.4mg, the content of the manganese sulfate tetrahydrate is 1.2-1.8mg, the content of the copper sulfate heptahydrate is 0.16-0.24mg, the content of the zinc sulfate heptahydrate is 0.8-1.2mg, and the content of the ammonium molybdate tetrahydrate is 0.24-0.36 mg.

The sum of the weights of the metal inorganic salt and the organic salt is < 2130 mg. Too high a concentration of salt can cause leaf rot and death and old root rot.

Specifically, the amount of calcium nitrate tetrahydrate may be 780mg, 880mg, 970mg, 1050mg, 1101mg, 1152mg, the amount of monopotassium phosphate may be 521mg, 561mg, 612mg, 685mg, 768mg, the amount of magnesium sulfate heptahydrate may be 288mg, 321mg, 374mg, 432mg, the amount of nitrogen fertilizer may be 40mg, 45mg, 50mg, 55mg, 60mg, the amount of ammonium sulfate may be 64mg, 72mg, 80mg, 88mg, 96mg, the amount of ferrous sulfate heptahydrate may be 16mg, 18mg, 20mg, 22mg, the amount of EDTA may be 16mg, 18mg, 20mg, 22mg, the amount of manganese sulfate tetrahydrate may be 1.2mg, 1.4mg, 1.6mg, 1.8mg, copper sulfate heptahydrate may be 0.16mg, 0.18mg, 0.20mg, 0.22mg, 0.24mg, the amount of boron fertilizer may be 1.6mg, 1.8mg, 2.0mg, 2.2mg, 2.4mg, 0.8mg of zinc sulfate heptahydrate, 0.6 mg, 0.8mg, 8mg, 0.8mg, 2mg, 0.8mg, 2mg, 0.8mg, 8mg, 0.8mg, 2mg, 0.8mg, 0.6 mg, 2mg, 0.8mg, 2mg, 0.8mg, 0.6 mg, 0.8mg, 8mg, 0.8mg, 0mg, 0.8mg, 2mg, 0.8mg, 2mg, 0.8mg, 2mg, 0.8mg, 2mg, 8mg, 7.6mg, 8.0mg, 8.6mg, 9.0mg, 9.6mg, naphthylacetic acid may be 1.28mg, 1.48mg, 1.68mg, 1.78mg, 1.92 mg.

Further, the content of calcium nitrate tetrahydrate is 960mg, the content of monopotassium phosphate is 640mg, the content of magnesium sulfate heptahydrate is 360mg, the content of ammonium sulfate is 80mg, the content of urea is 50mg, the content of ferrous sulfate heptahydrate is 20mg, the content of EDTA is 20mg, the content of boric acid is 2mg, the content of manganese sulfate tetrahydrate is 1.5mg, the content of copper sulfate heptahydrate is 0.2mg, the content of zinc sulfate heptahydrate is 1mg, the content of ammonium molybdate tetrahydrate is 0.3mg, the content of indolebutyric acid is 8mg, and the content of naphthylacetic acid is 1.6 mg.

In another aspect, the present application provides a preparation method of the star point wood water culture nutrient solution, wherein the metal inorganic salt, the organic salt, the nitrogen fertilizer, the boron fertilizer and the root growth promoting agent in the star point wood water culture nutrient solution are uniformly mixed in water, and the pH is adjusted to be neutral. When the nutrient solution for soilless culture of asteriscus is prepared, various metal inorganic salts, organic salts, nitrogen fertilizers, boron fertilizers and root promoters can be sequentially added into water to be dissolved, and one substance is dissolved and then the other substance is dissolved; or dissolving the components in water respectively and then mixing uniformly to obtain the star point wood water culture nutrient solution. In order to facilitate transportation and carrying, the star point wood water culture nutrient solution can also be prepared into a concentrated solution, the formula amount of various metal inorganic salts, organic salts, nitrogen fertilizers, boron fertilizers and root growth promoting agents are divided into a plurality of parts, each part is dissolved in a small amount of water, and when the nutrient solution is used, the dissolved parts are mixed and diluted to the required concentration for soilless culture. The pH can be adjusted by dilute hydrochloric acid or sodium hydroxide solution.

The application also provides a preparation method of the concentrated nutrient solution, the asteriscus asterias water culture nutrient solution is adopted for preparation, and the steps comprise:

(1) calculating the dosage of the medicines and water required by the concentrated n times of nutrient solution, and dividing the water into 3 equal parts;

(2) preparing a solution A: weighing calcium nitrate tetrahydrate, ammonium sulfate and urea, and uniformly stirring in water for later use;

(3) preparing a solution B: weighing magnesium sulfate heptahydrate and potassium dihydrogen phosphate, and uniformly stirring in water for later use;

(4) preparing a solution C: weighing ferrous sulfate heptahydrate, EDTA, boric acid, manganese sulfate tetrahydrate, copper sulfate heptahydrate, zinc sulfate heptahydrate, ammonium molybdate tetrahydrate, indolebutyric acid and naphthylacetic acid, and uniformly stirring in water for later use;

(5) when in use, A, B, C parts with the same parts are uniformly mixed and diluted to n times.

For example, the star point wood water culture nutrient solution is prepared into a concentrated nutrient solution with the concentration of 100 times, and when the star point wood water culture nutrient solution is used, water is added to dilute the star point wood water culture nutrient solution with the concentration of 100 times to form a planting working solution, and then plant planting is carried out. Because the concentrated nutrient solution is directly prepared according to the formula, the concentration of the compound is too high, the concentration product among various ions is too high, the compound which is not dissolved in water can be generated, and the compound is not suitable for planting after being diluted, so that the concentrated nutrient solution is prepared according to the classification of the components of the nutrient solution, the compound is divided into a plurality of parts according to whether the ions in the compound can react with each other or not, and the reaction does not occur among the parts. The concentrated nutrient solution prepared by 100 times of the nutrient solution for soilless culture of star point wood, which is composed of calcium nitrate tetrahydrate, ammonium sulfate, urea, magnesium sulfate heptahydrate, potassium dihydrogen phosphate, ferrous sulfate heptahydrate, EDTA, boric acid, manganese sulfate tetrahydrate, copper sulfate heptahydrate, zinc sulfate heptahydrate, ammonium molybdate tetrahydrate, indolebutyric acid and naphthylacetic acid, is divided into A, B, C parts, and the preparation process is as follows:

(1) concentrating by 100 times, calculating the amount of each component and water, and dividing the water into 3 equal parts;

(2) preparing a solution A: weighing calcium nitrate tetrahydrate, ammonium sulfate and urea, and uniformly stirring in water for later use;

(3) preparing a solution B: weighing magnesium sulfate heptahydrate and potassium dihydrogen phosphate, and uniformly stirring in water for later use;

(4) preparing a solution C: weighing ferrous sulfate heptahydrate, EDTA, boric acid, manganese sulfate tetrahydrate, copper sulfate heptahydrate, zinc sulfate heptahydrate, ammonium molybdate tetrahydrate, indolebutyric acid and naphthylacetic acid, and uniformly stirring in water for later use.

When in use, A, B, C parts are evenly mixed and diluted to 100 times.

The application provides the application of the star point wood water culture nutrient solution on the other hand, most root systems of the large star point wood seedlings cultured by soil are pruned, the star point wood water culture nutrient solution is adopted for water culture, most root systems of the large star point wood seedlings cultured by soil are pruned, the root systems cultured by soil are prevented from being rotten when being planted in water, the absorption of the root systems to the water culture nutrient solution can be met only through a few root systems which are not pruned, and under the condition that the plant type and the leaf color of the star point wood are not changed or even can continue to grow through the combination of various salts and the root promoting agent in the water culture nutrient solution, robust and numerous new water culture root systems grow on the basis of the untrimmed soil culture root systems in a short period, namely the star point wood seedlings grow into the star point wood seedlings which can be planted by water culture and meet the ornamental requirement are converted from the soil culture root systems into the water culture root systems.

Drawings

FIG. 1 is a diagram of the growth of Astrocaryum vulgare in soilless culture without the nutrient solution of Astrocaryum vulgare in example 1.

FIG. 2 is a diagram showing the growth of Asteris nodosa after 30 days of soilless culture with the nutrient solution for soilless culture of Asteris nodosa of example 1.

FIG. 3 is an enlarged view of the fifth plant from left to right in FIG. 1.

FIG. 4 is an enlarged view of the fifth plant from left to right in FIG. 2.

FIG. 5 is a diagram of the growth of Astrocaryum vulgare in soilless culture without the Astrocaryum vulgare soilless culture nutrient solution of comparative example 1.

FIG. 6 is a graph showing the growth of Asteris nodosa after 30 days of soilless culture with the Asteris nodosa soilless culture nutrient solution of comparative example 1.

FIG. 7 is an enlarged view of the second plant from left to right in FIG. 5.

Fig. 8 is an enlarged view of the second plant from left to right in fig. 6.

FIG. 9 is a diagram of the growth of Astrocaryum vulgare in soilless culture without the nutrient solution for Astrocaryum vulgare soilless culture of comparative example 2.

FIG. 10 is a diagram showing the growth of Asterina asteroides in soilless culture with the nutrient solution for soilless culture of Asterina asteroides of comparative example 2.

FIG. 11 is an enlarged view of the first plant from left to right in FIG. 9.

FIG. 12 is an enlarged view of the first plant from left to right in FIG. 10.

Detailed Description

The technical solutions of the present invention are further illustrated below by specific examples, and the raw materials according to the examples of the present invention are all commercially available.

Example 1

Preparing a nutrient solution, namely 19.2g of calcium nitrate tetrahydrate, 12.8g of monopotassium phosphate, 7.2g of magnesium sulfate heptahydrate, 1.6g of ammonium sulfate, 1g of urea, chelated iron (EDTA0.4g of iron sulfate heptahydrate, 0.4g of ferrous sulfate heptahydrate), 0.04g of boric acid, 0.030g of manganese sulfate tetrahydrate, 0.004g of copper sulfate heptahydrate, 0.02g of zinc sulfate heptahydrate, 0.006g of ammonium molybdate tetrahydrate, 0.16g of indolebutyric acid, 0.032g of naphthylacetic acid and 20L of water, uniformly mixing, adjusting the pH value to be neutral by using dilute sulfuric acid, and uniformly stirring to obtain the star point wood hydroponic nutrient solution.

Example 2

Preparing a nutrient solution, namely taking 19.2g of calcium nitrate tetrahydrate, 12.8g of monopotassium phosphate, 7.2g of magnesium sulfate heptahydrate, 1.6g of ammonium sulfate, 1g of urea, 0.4g of chelated iron (EDTA0.4g of ferrous sulfate heptahydrate, 0.4g of boric acid), 0.030g of manganese sulfate tetrahydrate, 0.004g of copper sulfate heptahydrate, 0.02g of zinc sulfate heptahydrate, 0.006g of ammonium molybdate tetrahydrate, 0.128g of indolebutyric acid, 0.0256g of naphthylacetic acid and 20L of water, uniformly mixing, adjusting the pH value to be neutral by using dilute sulfuric acid, and uniformly stirring to obtain the star point wood hydroponic nutrient solution.

Example 3

Preparing nutrient solution, namely taking 15.6g of calcium nitrate tetrahydrate, 10.24g of monopotassium phosphate, 5.76g of magnesium sulfate heptahydrate, 1.28g of ammonium sulfate, 1g of urea, chelated iron (EDTA0.32g, 0.32g of ferrous sulfate heptahydrate), 0.04g of boric acid, 0.024g of manganese sulfate tetrahydrate, 0.0032g of copper sulfate heptahydrate, 0.016g of zinc sulfate heptahydrate, 0.0048g of ammonium molybdate tetrahydrate, 0.16g of indolebutyric acid, 0.032g of naphthylacetic acid and 20L of water, uniformly mixing, adjusting the pH value to be neutral by using dilute sulfuric acid, and uniformly stirring to obtain the acer water culture nutrient solution.

Example 4

Preparing nutrient solution, taking 23.04g of calcium nitrate tetrahydrate, 15.36g of monopotassium phosphate, 8.64g of magnesium sulfate heptahydrate, 1.92g of ammonium sulfate, 1g of urea, chelated iron (EDTA0.48g, 0.48g of ferrous sulfate heptahydrate), 0.04g of boric acid, 0.036g of manganese sulfate tetrahydrate, 0.0048g of copper sulfate heptahydrate, 0.02g of zinc sulfate heptahydrate, 0.0072g of ammonium molybdate tetrahydrate, 0.16g of indolebutyric acid, 0.032g of naphthylacetic acid and 20L of water, mixing, adjusting the pH value to be neutral by using dilute sulfuric acid, mixing, and uniformly stirring to obtain the planting nutrient solution.

Comparative example 1

Preparing a nutrient solution, namely 19.2g of calcium nitrate tetrahydrate, 12.8g of potassium dihydrogen phosphate, 7.2g of magnesium sulfate heptahydrate, 1.6g of ammonium sulfate, 1g of urea, chelated iron (EDTA0.4g of iron sulfate heptahydrate, 0.4g of ferrous sulfate heptahydrate), 0.04g of boric acid, 0.030g of manganese sulfate tetrahydrate, 0.004g of copper sulfate heptahydrate, 0.02g of zinc sulfate heptahydrate, 0.006g of ammonium molybdate tetrahydrate and 20L of water, uniformly mixing, adjusting the pH value to be neutral by using dilute sulfuric acid, and uniformly stirring to obtain the star point wood hydroponics nutrient solution.

Comparative example 2

Preparing a nutrient solution, namely 19.2g of calcium nitrate tetrahydrate, 12.8g of monopotassium phosphate, 7.2g of magnesium sulfate heptahydrate, 1.6g of ammonium sulfate, 1g of urea, chelated iron (EDTA0.4g of iron sulfate heptahydrate, 0.4g of ferrous sulfate heptahydrate), 0.04g of boric acid, 0.030g of manganese sulfate tetrahydrate, 0.004g of copper sulfate heptahydrate, 0.02g of zinc sulfate heptahydrate, 0.006g of ammonium molybdate tetrahydrate, 0.15g of indolebutyric acid, 0.2g of naphthylacetic acid and 20L of water, uniformly mixing, adjusting the pH value to be neutral by using dilute sulfuric acid, and uniformly stirring to obtain the star point wood hydroponic nutrient solution.

Comparative example 3

Preparing a nutrient solution, namely 19.2g of calcium nitrate tetrahydrate, 12.8g of monopotassium phosphate, 7.2g of magnesium sulfate heptahydrate, 1.6g of ammonium chloride, 1g of urea, chelated iron (EDTA0.4g of iron sulfate heptahydrate, 0.4g of ferrous sulfate heptahydrate), 0.04g of boric acid, 0.030g of manganese sulfate tetrahydrate, 0.004g of copper sulfate heptahydrate, 0.02g of zinc sulfate heptahydrate, 0.006g of ammonium molybdate tetrahydrate, 0.16g of indolebutyric acid, 0.032g of naphthylacetic acid and 20L of water, uniformly mixing, adjusting the pH value to be neutral by using dilute sulfuric acid, and uniformly stirring to obtain the star point wood hydroponic nutrient solution.

Comparative example 4

Preparing nutrient solution, namely taking 26.88g of calcium nitrate tetrahydrate, 17.92g of monopotassium phosphate, 10.08g of magnesium sulfate heptahydrate, 2.24g of ammonium sulfate, 1g of urea, chelated iron (EDTA0.56g, 0.56g of ferrous sulfate heptahydrate), 0.04g of boric acid, 0.042g of manganese sulfate tetrahydrate, 0.0056g of copper sulfate heptahydrate, 0.028g of zinc sulfate heptahydrate, 0.0084g of ammonium molybdate tetrahydrate, 0.16g of indolebutyric acid, 0.032g of naphthylacetic acid and 20L of water, uniformly mixing, adjusting the pH value to be neutral by using dilute sulfuric acid, and uniformly stirring to obtain the star point wood hydroponic nutrient solution.

The same batch of star point wood big seedlings are purchased from a nursery, after the root systems are cut off (only 2-5 soil culture root systems are left to meet the requirement of plants on the absorption of the soilless culture nutrient solution), the soilless culture nutrient solution of the star point wood prepared in the examples 1-4 and the comparative examples 1-4 is respectively adopted for soilless culture at normal temperature, each group of the nutrient solution is used for treating the 6 star point wood big seedlings with the root systems removed, the new root number and the average root length of the star point wood big seedlings are measured after 30 days of soilless culture, the results are shown in the table 1, and the new root number is the average value of 6 plants.

TABLE 1 growth of new roots of soilless cultivated Astrocaryum species after 30 days

Examples	New root number	Average root length (cm)
			Example 1	43	15
Example 2	28	11
			Example 3	32	13
Example 4	30	12
			Comparative example 1	15	6
Comparative example 2	24	10
			Comparative example 3	38	13
Comparative example 4	26	11

As can be seen from the results in Table 1, the number and length of new roots in examples 1 to 4 of the present application are advantageous. As can be seen from the combination of FIGS. 1 to 4, the Nutrition plates treated by the soilless culture of the nutrient solution of example 1 have more new roots and more grown roots. The number of new roots in example 2 was less than that in example 1, because the root-promoting agent concentration was lower and the effect of promoting rooting was inferior to that in example 1. The number of new roots in examples 3 and 4 was less than in example 1, because lower and higher salt concentrations may result in a reduction in the amount of new roots. As can be seen from FIGS. 5 to 8, the number of new roots is not increased much in comparative example 1, and particularly, the number of growing roots is small, mainly because the root growth promoting agent for promoting root growth is not present in comparative example 1. It is found from FIGS. 9 to 12 that in comparative example 2, the root growth is sparse and the number of new roots of Astrocaryum vulgare is not as large as that of example 1 because the content of indolebutyric acid is lower than that of naphthylacetic acid. In comparative example 3, although the number and length of new roots are acceptable, the tender leaves of the star point wood curl or the leaf tips dry due to the chlorine, which is not of ornamental value and is of little significance. Comparative example 4 has old root rot phenomenon due to too high total salt content, and the number and length of new roots are also inhibited from increasing.

The star point wood water culture nutrient solution realizes the growth promotion of roots, stems, branches and leaves in a short time, particularly the increase of the number of new roots and the increase of the length of the roots by strictly controlling the respective contents of metal inorganic salt, organic salt, nitrogen fertilizer, boron fertilizer and root growth promoting agent. Specifically, the metal inorganic salts comprise calcium nitrate tetrahydrate, potassium dihydrogen phosphate, magnesium sulfate heptahydrate, ammonium sulfate, ferrous sulfate heptahydrate, manganese sulfate tetrahydrate, copper sulfate heptahydrate, zinc sulfate heptahydrate and ammonium molybdate tetrahydrate, various metal salts are provided to meet the growth requirements of roots, stems and leaves of the asteriscus scaber, and the used compounds have good solubility and can avoid a large amount of sediment accumulation in a soilless culture planting slot; meanwhile, the manganese content is higher than the contents of copper and zinc, so that the situation that the manganese absorption of leaves of the asteriscus scaber can be inhibited due to the fact that the contents of copper and zinc are too high is avoided, and the color of the leaves is improved. The content of the calcium nitrate tetrahydrate is greater than that of the potassium dihydrogen phosphate, so that the phenomenon that the absorption of the star point wood to the N is inhibited due to the fact that the content of the P is too high is avoided. The organic salt is EDTA, the content of the EDTA is the same as that of the ferrous sulfate heptahydrate, the EDTA and the ferrous sulfate heptahydrate react to obtain chelated iron, and the EDTA can enable iron ions to form a stable water-soluble iron complex, so that the phenomenon that the iron ions form precipitates due to other factors, the absorption of iron elements is influenced, and iron deficiency is avoided. In addition, the content of indolebutyric acid (6.4-9.6 mg) and naphthylacetic acid (1.28-1.92 mg) in the asteriscus aspergillum water culture nutrient solution is controlled, compared with the content of indolebutyric acid (1-2mg) and naphthylacetic acid (0.3-0.5mg) required in a common plant, because the cell walls of asteriscus aspergillum have larger gaps, the indolebutyric acid and the naphthylacetic acid are adsorbed in the gaps, the growth of the asteriscus aspergillum plant can be supplied only after the gaps are filled, the better growth cannot be provided when the content is too low, and the growth can be inhibited when the content is too high. Meanwhile, the content of indolebutyric acid is controlled to be higher than that of naphthylacetic acid, indolebutyric acid can induce the formation of a root pathogen, promote cell differentiation and division, facilitate the generation of new roots and the differentiation of a vascular bundle system, and promote the formation of adventitious roots of cuttings.

It should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the invention, and that those skilled in the art, upon reading this disclosure, will be able to modify various equivalent forms of the invention without departing from the scope of the invention as defined in the appended claims.

Claims (7)

1. A star point wood water culture nutrient solution is characterized by comprising metal inorganic salt, organic salt, a root promoting agent, a nitrogen fertilizer and a boron fertilizer in per liter of water, wherein the nitrogen fertilizer is urea,

the composition of the metal inorganic salt is 780-1152mg of calcium nitrate tetrahydrate, 512-768mg of monopotassium phosphate, 288-432mg of magnesium sulfate heptahydrate, 64-96mg of ammonium sulfate, 16-24mg of ferrous sulfate heptahydrate, 1.2-1.8mg of manganese sulfate tetrahydrate, 0.16-0.24mg of copper sulfate heptahydrate, 0.8-1.2mg of zinc sulfate heptahydrate and 0.24-0.36mg of ammonium molybdate tetrahydrate,

the content of the nitrogen fertilizer is 40-60mg, the content of the boron fertilizer is 1.6-2.4mg,

the root promoting agent comprises 6.4-9.6mg of indolebutyric acid and 1.28-1.92mg of naphthylacetic acid;

the organic salt is EDTA, the content of the EDTA is the same as that of the ferrous sulfate heptahydrate, the EDTA and the ferrous sulfate heptahydrate react to obtain chelated iron, and the total weight of the metal inorganic salt and the organic salt is less than 2130 mg.

2. The star point wood hydroponic nutrient solution of claim 1, wherein the weight ratio of the indolebutyric acid to the naphthylacetic acid is 5.

3. The star point wood water planting nutrient solution of claim 1, wherein the boric fertilizer is boric acid.

4. The asteriscus scaber hydroponic nutrient solution according to claim 1, wherein the content of calcium nitrate tetrahydrate, the content of monopotassium phosphate is 640mg, the content of magnesium sulfate heptahydrate is 360mg, the content of ammonium sulfate is 80mg, the content of nitrogen fertilizer is 50mg, the content of ferrous sulfate heptahydrate is 20mg, the content of EDTA is 20mg, the content of boron fertilizer is 2mg, the content of manganese sulfate tetrahydrate is 1.5mg, the content of copper sulfate heptahydrate is 0.2mg, the content of zinc sulfate heptahydrate is 1mg, the content of ammonium molybdate tetrahydrate is 0.3mg, the content of indolebutyric acid is 8mg, and the content of naphthylacetic acid is 1.6 mg.

5. A preparation method of a star point wood water culture nutrient solution is characterized in that the metal inorganic salt, the organic salt, the nitrogen fertilizer, the boron fertilizer and the root growth promoter in the star point wood water culture nutrient solution of any one of claims 1 to 4 are uniformly mixed in water, and the pH is adjusted to be neutral.

6. The application of the star point wood water culture nutrient solution is characterized in that most root systems of the star point wood cultured by soil are trimmed, and the star point wood water culture nutrient solution of any one of claims 1 to 4 is adopted for water culture.

7. A preparation method of a concentrated nutrient solution, which is characterized in that the anoectochilus formosanus water culture nutrient solution of any one of claims 1 to 4 is adopted for preparation, and the preparation method comprises the following steps:

(1) calculating the dosage of the medicines and water required by the concentrated n times of nutrient solution, and dividing the water into 3 equal parts;

(2) preparing a solution A: weighing calcium nitrate tetrahydrate, ammonium sulfate and urea, and uniformly stirring in water for later use;

(3) preparing a solution B: weighing magnesium sulfate heptahydrate and potassium dihydrogen phosphate, and uniformly stirring in water for later use;

(4) preparing a solution C: weighing ferrous sulfate heptahydrate, EDTA, boric acid, manganese sulfate tetrahydrate, copper sulfate heptahydrate, zinc sulfate heptahydrate, ammonium molybdate tetrahydrate, indolebutyric acid and naphthylacetic acid, and uniformly stirring in water for later use;

(5) when in use, A, B, C parts with the same parts are uniformly mixed and diluted to n times.

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