Root-promoting and sweetening agent, composition and application of root-promoting and sweetening agent

Abstract

The invention provides a root-promoting and sweetness-increasing agent, a composition and application thereof, and belongs to the technical field of pesticide compounding, the effective components of the root-promoting and sweetness-increasing agent of the composition are composed of DCPTA and ethychlozate according to the mass ratio of (0.1-500): 1, DCPTA widens the dosage range of ethychlozate as a rooting and growth-promoting agent, and the dosage range of ethychlozate as a rooting and growth-promoting agent is increased; and the composition has obvious synergistic and decrement effects in the aspects of rooting and sugar increase, and when the composition is applied to plant growth, the effects of promoting rooting and sweetening fruits of plants can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticide compounding, and specifically relates to a root promoting and sweetening agent, a composition and an application thereof. Background Art

[0002] Yield-increasing amines are amine compounds that can directly act on the cell nucleus of plants, and by affecting some of the plant's genes, repairing defective genes, regulating gene expression, promoting plant biosynthesis and metabolism, and improving crop quality; they can significantly increase the photosynthesis of green plants, increase the absorption and utilization of carbon dioxide, and the leaves after use will become significantly greener, thicker, and larger, and at the same time have the functions of preventing chlorophyll decomposition, keeping green and fresh, and preventing premature aging; they can increase the accumulation and storage of substances such as proteins and lipids, increase the activity and content of synthases, accelerate the biosynthesis of endogenous hormone isoprene, promote rapid cell division and growth, and increase crop yields; when used on fruit and vegetable crops, they can promote fruit coloring, increase the content of nutrients such as vitamins, amino acids, and free sugars in fruits and vegetables, strengthen the enrichment of aroma substances in melons and fruits, and increase the content of natural flavors in melons and fruits, making melons and fruits sweeter and taste better, thereby enhancing the commodity value of the product; when used on flowers, they can increase the content of essential oils in flower plants, making the flowers more fragrant.

[0003] Indole ester belongs to the indazole plant growth regulator, has auxin activity, can be absorbed by the stems and leaves of plants, and metabolized into 5-chloro-1H-indazolecarboxylic acid in the plant body to take effect; it has auxin activity at low concentrations, can promote rooting, increase the root system's absorption of water and mineral elements, and thus promote growth and increase income; at a certain concentration, it can induce the production of endogenous ethylene, promote the formation of abscission layer, and achieve the effect of thinning flowers and fruits; at high concentrations, it can inhibit the operation of auxin, control vegetative growth, promote reproductive growth, and transport as many photosynthetic products as possible to the fruit part, achieving the effect of early maturity and sugar increase. It can be seen that indole ester can achieve different effects of rooting, thinning flowers and fruits, and early maturity and sugar increase due to different dosages. However, due to its narrow rooting dosage range, indole ester is far less used in the field of rooting than naphthylacetic acid and indole agents. So far, there has been no report on the combination of indole ester and yield-increasing amine. Summary of the invention

[0004] In order to solve the problem of narrow dosage range of indole ester in the prior art and to need a multifunctional agent with better rooting effect, the first purpose of the present invention is to provide an agent for promoting root growth and enhancing sweetness.

[0005] The second object of the present invention is to provide a root sweetening and promoting composition.

[0006] The third object of the present invention is to provide a root-promoting and sweetening agent and composition for use in promoting plant rooting and / or fruit sweetening.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A root-promoting and sweetness-increasing agent, the active ingredients of which are composed of dikegulac and indoleacetic acid in a mass ratio of (0.1-500):1.

[0009] The present invention belongs to a pioneering invention. It uses dikegulac and indoleacetic acid as active ingredients, which can alleviate the high-dose negative effects of indoleacetic acid single agent, and has an obvious effect of enhancing the root-promoting effect and reducing the dosage. It can be used as a broad-spectrum, safe and effective plant root-promoting agent. At the same time, when applied during the fruit ripening stage, it can achieve the effect of increasing sweetness. This agent can also be used in combination with other compatible agents to exert its effect.

[0010] Preferably, the mass ratio of dikegulac to indoleacetic acid is (1-50):1.

[0011] Preferably, the agent is in liquid dosage form, and the content of the active ingredients of the agent is 1.1-60%.

[0012] Preferably, the agent further comprises auxiliaries and solvents. The solvent is one or two of ethanol, propylene glycol, dimethyl sulfoxide, solvent oil, xylene; the auxiliary is one or two of OP-10, alkyl glycoside, agricultural emulsion 500, agricultural emulsion 602. According to actual application requirements, the present invention is prepared into one of the dosage forms such as aqueous emulsion, microemulsion, suspension, soluble solution, emulsifiable concentrate, etc. by adding wetting and dispersing agents, emulsifiers, penetrants, pH regulators, antifreeze agents, thickeners, dispersion media, etc. according to the methods well known to those skilled in the art.

[0013] Preferably, when promoting root growth, the concentration of dikegulac is 1-100 mg / L, and the concentration of indoleacetic acid is 0.02-20 mg / L; when increasing sweetness, the concentration of dikegulac is 50-250 mg / L, and the concentration of indoleacetic acid is 5-50 mg / L.

[0014] To achieve the above object, the present invention provides a root-promoting and sweetness-increasing composition, which is composed of dikegulac and indoleacetic acid, and the mass ratio of dikegulac to indoleacetic acid is (0.1-500):1.

[0015] Preferably, the mass ratio of dikegulac to indoleacetic acid is (1-50):1.

[0016] Preferably, the content of the active ingredients of the composition is 1.1-60%.

[0017] The beneficial effects of the above technical solution are as follows: This composition uses dikegulac and indoleacetic acid as active ingredients to achieve the effects of promoting plant root growth and fruit sweetness increase. This composition can also be used in combination with other compatible reagents to exert its effect.

[0018] To achieve the above object, the present invention provides an application of a root-promoting and sweetness-increasing agent and composition in promoting plant rooting and / or fruit sweetness increase.

[0019] Preferably, promoting plant rooting is used at the seedling stage, and promoting fruit sweetness increase is used at the fruit swelling stage.

[0020] The beneficial effect of the above technical solution is that the root-promoting and sweetness-increasing agent and composition of the present invention can promote the growth of plant roots when applied to the seedling stage of plants, and at the same time, applying a high-concentration composition to the fruit swelling stage of plants can achieve the effect of sweetness increase. Description of the Drawings

[0021] Figure 1 It is a comparison diagram of watermelon root system scanning for Experiment 3 of the present invention. Detailed Embodiments

[0022] The present invention mainly aims at the problem that the dosage range of ethephon is narrow and the effect on plants is limited in the prior art, and provides a composition containing daminozide and ethephon and its application. The daminozide in the composition can broaden the usage range of ethephon, and has the effects of enhancing and reducing the dosage of the rooting effect. At the same time, applying a certain concentration of the composition agent at the fruit ripening stage can produce the effect of sweetness increase.

[0023] The following further illustrates the technical solution of the present invention in conjunction with specific embodiments, and the ratios in the embodiments are all in mass percentages.

[0024] I. Specific Embodiments of the Root-Promoting and Sweetness-Increasing Agent and Composition of the Present Invention

[0025] Example 1

[0026] Preparation of 1.1% daminozide·ethephon soluble solution

[0027] 1% of daminozide technical, 0.1% of ethephon, 1% of surfactant OP-10, and ethanol is added to make up to 100%; the above materials are added to a mixer according to the weight percentage and mixed evenly to obtain 1.1% daminozide·ethephon soluble solution.

[0028] Taking Example 1 as an example, the preparation of its corresponding composition is the same as above and will not be repeated here.

[0029] Example 2

[0030] Preparation of 2% daminozide·ethephon soluble solution

[0031] 1% of daminozide technical, 1% of ethephon, 1% of surfactant alkyl polyglycoside, and ethanol is added to make up to 100%; the above materials are added to a mixer according to the weight percentage and mixed evenly to obtain 2% daminozide·ethephon soluble solution.

[0032] Example 3

[0033] Configuration of 6% Clomeprop + Ethychlozate EC

[0034] 1% of clomeprop technical, 5% of ethyclozate, 5% of auxiliary agent Nongru 500, and the solvent oil is made up to 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 6% Clomeprop + Ethychlozate EC.

[0035] Example 4

[0036] Configuration of 11% Clomeprop + Ethychlozate EC

[0037] 1% of clomeprop technical, 10% of ethyclozate, 5% of auxiliary agent Nongru 602, and the solvent oil is made up to 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 11% Clomeprop + Ethychlozate EC.

[0038] Example 5

[0039] Configuration of 5.1% Clomeprop + Ethychlozate SL

[0040] 5% of clomeprop technical, 0.1% of ethyclozate, 2.5% of auxiliary agent OP-10, and propylene glycol is made up to 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 5.1% Clomeprop + Ethychlozate SL.

[0041] Example 6

[0042] Configuration of 6% Clomeprop + Ethychlozate SL

[0043] 5% of clomeprop technical, 1% of ethyclozate, 2.5% of auxiliary agent alkyl polyglycoside, and propylene glycol is made up to 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 6% Clomeprop + Ethychlozate SL.

[0044] Example 7

[0045] Configuration of 10% Clomeprop + Ethychlozate EC

[0046] 5% of clomeprop technical, 5% of ethyclozate, 10% of auxiliary agent Nongru 500, and xylene is made up to 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 10% Clomeprop + Ethychlozate EC.

[0047] Example 8

[0048] Configuration of 15% Clomeprop + Ethychlozate EC

[0049] 5% of clomeprop technical, 10% of ethyclozate, 10% of auxiliary agent Nongru 602, and xylene is made up to 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 15% Clomeprop + Ethychlozate EC.

[0050] Example 9

[0051] Preparation of 10.1% mepiquat chloride · forchlorfenuron soluble solution

[0052] 10% mepiquat chloride technical, 0.1% forchlorfenuron, 2.5% surfactant OP-10, 2.5% alkyl polyglycoside, and ethanol to make up 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 10.1% mepiquat chloride · forchlorfenuron soluble solution.

[0053] Example 10

[0054] Preparation of 11% mepiquat chloride · forchlorfenuron soluble solution

[0055] 10% mepiquat chloride technical, 1% forchlorfenuron, 2.5% surfactant OP-10, 2.5% alkyl polyglycoside, and propylene glycol to make up 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 11% mepiquat chloride · forchlorfenuron soluble solution.

[0056] Example 11

[0057] Preparation of 15% mepiquat chloride · forchlorfenuron emulsifiable concentrate

[0058] 10% mepiquat chloride technical, 5% forchlorfenuron, 6% surfactant agricultural emulsifier 500, 6% surfactant agricultural emulsifier 602, and xylene to make up 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 15% mepiquat chloride · forchlorfenuron emulsifiable concentrate.

[0059] Example 12

[0060] Preparation of 20% mepiquat chloride · forchlorfenuron emulsifiable concentrate

[0061] 10% mepiquat chloride technical, 10% forchlorfenuron, 6% surfactant agricultural emulsifier 500, 6% surfactant agricultural emulsifier 602, and solvent oil to make up 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 20% mepiquat chloride · forchlorfenuron emulsifiable concentrate.

[0062] Example 13

[0063] Preparation of 50.1% mepiquat chloride · forchlorfenuron soluble solution

[0064] 50% mepiquat chloride technical, 0.1% forchlorfenuron, 5% surfactant OP-10, and dimethyl sulfoxide to make up 100%; add the above materials into a mixer according to the weight percentage and mix evenly to obtain 50.1% mepiquat chloride · forchlorfenuron soluble solution.

[0065] Example 14

[0066] Preparation of 51% mepiquat chloride · forchlorfenuron soluble solution

[0067] The original drug of mepiquat chloride is 50%, ethephon is 1%, the auxiliary agent alkyl polyglycoside is 5%, and dimethyl sulfoxide is added to make up 100%; the above materials are added to a mixer according to the weight percentage and mixed evenly to obtain a 51% mepiquat chloride·ethephon soluble solution.

[0068] Example 15

[0069] Preparation of 55% mepiquat chloride·ethephon emulsifiable concentrate

[0070] The original drug of mepiquat chloride is 50%, ethephon is 5%, the auxiliary agent agricultural emulsion 500 is 7.5%, agricultural emulsion 602 is 7.5%, and xylene is added to make up 100%; the above materials are added to a mixer according to the weight percentage and mixed evenly to obtain a 55% mepiquat chloride·ethephon emulsifiable concentrate.

[0071] Example 16

[0072] Preparation of 60% mepiquat chloride·ethephon emulsifiable concentrate

[0073] The original drug of mepiquat chloride is 50%, ethephon is 10%, the auxiliary agent agricultural emulsion 500 is 7.5%, agricultural emulsion 602 is 7.5%, and solvent oil is added to make up 100%; the above materials are added to a mixer according to the weight percentage and mixed evenly to obtain a 60% mepiquat chloride·ethephon emulsifiable concentrate.

[0074] Comparative Example 1

[0075] Preparation of 10% mepiquat chloride soluble concentrate

[0076] The original drug of mepiquat chloride is 10%, the auxiliary agent OP-10 is 2.5%, alkyl polyglycoside is 2.5%, and ethanol is added to make up 100%; the above materials are added to a mixer according to the weight percentage and mixed evenly to obtain a 10% mepiquat chloride soluble solution.

[0077] Comparative Example 2

[0078] Preparation of 5% ethephon emulsifiable concentrate

[0079] Ethephon is 5%, the auxiliary agent agricultural emulsion 500 is 5%, and solvent oil is added to make up 100%; the above materials are added to a mixer according to the weight percentage and mixed evenly to obtain a 5% ethephon emulsifiable concentrate.

[0080] II. Examples of the application of the root-promoting and sweetness-increasing agents and compositions of the present invention in promoting plant rooting and / or fruit sweetness increase. The test agents in the following examples are all prepared according to the above formulas.

[0081] Experiment 1 is an example of the composition containing mepiquat chloride and ethephon and its application. Specifically, it is a rooting test of mung bean hypocotyls in the bioassay laboratory. The specific implementation steps are as follows:

[0082] The experiment was conducted in the Bio-Test Laboratory of Henan Crop Chemical Control Engineering Technology Research Center. Combinations and single agents with different proportions and contents were used to treat mung bean hypocotyls. The specific treatment data are shown in Table 1 below:

[0083] Table 1 Data of rooting test of mung bean hypocotyl

[0084]

[0085]

[0086] The mung bean seedlings were cultured in the substrate. When they grew to a height of about 15 cm, the mung bean seedlings with uniform growth were selected. The upper end was cut 3 cm below the hypocotyl of the mung bean, and the incision was cut obliquely. The base was soaked in the above-mentioned agent (ultrapure water was diluted to the concentration of the active ingredient in Table 1) for 24 hours, and then replaced with tap water for cultivation. The rooting of the base was observed. Ultrapure water was used as the control agent. A total of 9 treatments were set for the test and control agents. Each treatment was set up with 3 parallels, and each parallel was 3 mung bean seedlings. The number of roots and root length at the base of each mung bean seedling were measured 10 days after the drug was applied. The results are shown in Table 2:

[0087] Table 2 Results of mung bean hypocotyl rooting test

[0088]

[0089] The comparative experimental results show that:

[0090] (1) Treatment with a single dose of 100 mg / L of yield-enhancing amine slightly promoted the number of roots and total root length of mung bean hypocotyls;

[0091] (2) Indole ester single dose 0.02 mg / L treatment slightly promoted the root number and total root length of mung bean hypocotyls;

[0092] (3) When treated with a single dose of 2 mg / L indole ester, the root number promotion rate increased to 71.8%, and the total root length inhibition rate increased to 58.9%;

[0093] (4) When treated with a single dose of 20 mg / L indole ester, the plants were inactivated.

[0094] The results of the compounding of indole ester with increasing yield amine showed that:

[0095] The root number and total root length promotion rate of the treatment with 10 mg / L of yield-increasing amine combined with 0.02 mg / L of indole ester (Example 13) were significantly better than those of the single agent of 0.02 mg / L of indole ester;

[0096] The promotion rate of the number of roots and the total root length treated with 100 mg / L of mepiquat chloride compounded with 1 mg / L of ethephon (Example 9) was significantly better than that of 100 mg / L of mepiquat chloride alone, and better than that of 2 mg / L of ethephon alone. It had the effect of reducing the amount and increasing the efficiency on the number of roots of ethephon, and at the same time could alleviate the inhibitory effect on the total root length to promotion;

[0097] After treatment with 20 mg / L of mepiquat chloride compounded with 4 mg / L of ethephon (Example 6), while promoting the number of roots, it had a promoting effect on the total root length. The promotion rate of the number of roots was better than that of 2 mg / L of ethephon, and there was no inhibition on the total root length;

[0098] After treatment with 2 mg / L of mepiquat chloride compounded with 20 mg / L of ethephon (Example 4), the growth of the plants was normal, and the promoting effect on the number of roots and the total root length of the hypocotyls of mung beans was significant.

[0099] In summary, when ethephon and mepiquat chloride are applied in combination in a certain proportion, mepiquat chloride has the effect of reducing the amount and increasing the efficiency on the rooting effect of ethephon, can promote the increase in the number of roots, alleviate the inhibitory effect on the total root length under high-concentration conditions, and at the same time expand the application range for promoting rooting.

[0100] Experiment 2 was an example of the composition containing mepiquat chloride and ethephon and its application, specifically a corn pot experiment. The specific implementation steps are as follows:

[0101] The experiment was carried out in the bioassay laboratory of the Crop Chemical Control Engineering Technology Research Center of Henan Province. Corn pots were treated with compositions and single agents with different proportions and contents. The specific treatments are shown in Table 3 below:

[0102] Table 3 Corn pot experiment data

[0103]

[0104] A pot experiment was adopted. The pot had a mouth diameter of 12 cm, a bottom diameter of 8.5 cm, and a height of 9.5 cm. The tested soil was peat soil. Corn seeds of the same size and plump grains were disinfected with 10% sodium hypochlorite solution for 10 min, taken out, rinsed repeatedly with distilled water, and then blotted dry with filter paper. They were sown in the pots, and corn seedlings with the same growth trend were retained, with 2 seedlings per pot. When the corn seedlings grew to two leaves and one heart, 50 ml / pot of the medicament diluted with tap water to the effective ingredient concentration was irrigated. 10 days after the application of the drug, the root biomass accumulation was investigated, and the number of scanned root tips was counted. The experimental results are shown in Table 4 below:

[0105] Table 4 Results of the corn pot experiment

[0106]

[0107] (1) The results of the control group showed that:

[0108] When the concentration of uniconazole is 25 mg / L and 50 mg / L, it has a slight promoting effect on the root length and root tip number of maize seedlings;

[0109] When the concentration of ethephon is 0.5 - 20 mg / L, the promoting effect on the root length and root tip number of maize shows a parabolic state. When the concentration is 0.5 mg / L, the promotion rate is average. When the concentration is 5 mg / L, the promotion rates of root length and root tip number are 18.2% and 16.5% respectively. As the concentration increases, the promoting effect weakens or inhibits, and the applicable range of ethephon is narrow.

[0110] (2) The results of the examples show that:

[0111] Combining uniconazole and ethephon in a certain proportion has a synergistic effect on maize rooting. Among them, uniconazole 12.5 mg / L compounded with ethephon 0.25 mg / L (Example 5), and uniconazole 25 mg / L compounded with ethephon 0.5 mg / L (Example 14) have significantly better promoting effects on maize root length and root tip number than uniconazole alone at 25 mg / L and ethephon alone at 0.5 mg / L. The combination of the two has the effect of reducing dosage and increasing efficiency;

[0112] Uniconazole 50 mg / L compounded with ethephon 5 mg / L (Example 15) has significantly better promoting effects on the number of maize roots and root tips than ethephon alone at 5 mg / L;

[0113] Uniconazole 20 mg / L compounded with ethephon 20 mg / L (Example 12) can relieve the inhibitory effect of ethephon alone at 20 mg / L on maize root length and root tip number until the promoting effect is significant.

[0114] In summary, the combination of uniconazole and ethephon has the effect of reducing dosage and increasing efficiency on the rooting of maize seedlings, and at the same time can broaden the applicable range of ethephon alone.

[0115] Experiment 3 is an example of a composition containing uniconazole and ethephon and its application, specifically a field watermelon root irrigation test. The specific implementation steps are as follows:

[0116] The test was carried out in Dingliu Village, Zhongmou, Zhengzhou, Henan Province. Watermelon seedlings were treated with compositions and single agents with different ratios and contents. The specific treatments are shown in Table 5 below:

[0117] Table 5 Data of field watermelon root irrigation test

[0118]

[0119] At the time of transplanting and planting watermelon seedlings, root irrigation was carried out at 50 ml / plant. After 7 days of applying the medicine, the growth trend was observed and the root biomass accumulation was investigated. The results are shown in Table 6 below:

[0120] Table 6 Results of field watermelon root irrigation test

[0121]

[0122]

[0123] Note: Degree of phytotoxicity: - No phytotoxicity; + The plant seedlings are slightly shorter, without affecting normal growth; ++ Obvious phytotoxicity, the plants are short, the root system is significantly inhibited, affecting normal growth in the later stage; +++ The plants are short, the root system is severely inhibited, and there is no growth in the later stage.

[0124] (1) The results of single-agent use show that:

[0125] The treatments with 25 mg / L and 50 mg / L of the single-agent of dikegulac in Comparative Example 1 slightly promoted the accumulation of root dry weight biomass; as Figure 1 shown, the single-agent of ethephon at a concentration of 2.5 mg / L had no obvious promoting effect on the accumulation of root dry weight biomass. When the concentration was 5 mg / L, it slightly promoted the accumulation of root dry weight biomass. As the concentration increased, it was ineffective or inhibited root growth;

[0126] (2) The compound application of dikegulac and ethephon in a certain ratio has a synergistic effect on the rooting of watermelon:

[0127] The compound of 5 mg / L of dikegulac and 5 mg / L of ethephon (Example 2), and the compound of 12.5 mg / L of dikegulac and 2.5 mg / L of ethephon (Example 16) significantly promoted the root dry weight of watermelon compared with the single-agent of ethephon at 2.5 mg / L and 5 mg / L;

[0128] The compound of 25 mg / L of dikegulac and 0.5 mg / L of ethephon (Example 5) significantly promoted the root dry weight of watermelon compared with the single-agent of dikegulac at 25 mg / L and 50 mg / L, and was superior to ethephon at 2.5 - 20 mg / L;

[0129] In addition, from Figure 1 the results in Table 6, it can be seen that the compound of 20 mg / L of dikegulac and 2 mg / L of ethephon (Example 10) significantly promoted the root dry weight of watermelon compared with other examples.

[0130] In summary, the compound of dikegulac and ethephon has a reducing and synergistic effect on the rooting of watermelon seedlings compared with the single-agent, can broaden its application range, and is safe and effective.

[0131] Experiment 4 is an example of the composition containing dikegulac and ethephon and its application, specifically the experiment on the effect of increasing sweetness in the later stage of watermelon swelling. The specific implementation steps are as follows:

[0132] In the later stage of watermelon swelling, the whole plant was re-sprayed with the expanded concentration according to the ratio shown in Table 7 below. The liquid volume of the medicine was 30 L / mu, and it was harvested 10 days after applying the medicine. The sweetness of the watermelon was measured. The method for measuring the sweetness was to use a handheld portable sweetness meter, and the juice at different sites in the center and edge of the watermelon was taken to measure the sweetness and take the average value.

[0133] Table 7 Experimental data on the effect of increasing sweetness in the late stage of watermelon swelling

[0134]

[0135] Note: Degree of phytotoxicity: - No phytotoxicity; + Slight curling of leaves, does not affect the normal growth of crops; ++ Obvious phytotoxicity in both curled leaves and melons, will not cause losses or only cause slight losses; +++ Severe phytotoxicity, serious losses in crop yield and quality.

[0136] (1) The results of single-agent use show that:

[0137] The single-agent use of dikegulac or ethephon has limited effect on increasing the sweetness of watermelon. When the single-agent dosage of dikegulac is 250 mg / L and 500 mg / L, the sweetness promotion rates of watermelon are 6.78% and 10.45% respectively;

[0138] When the single-agent concentration of ethephon is 25 mg / L, the effect on the sweetness promotion rate of watermelon is not obvious; when the concentration is increased to 50 mg / L, the sweetness promotion rate can be increased to 13.09%. As the concentration continues to increase, the increase in the sweetness promotion rate is not obvious, and at the same time, it will cause curling of watermelon leaves, with the risk of phytotoxicity.

[0139] (2) After compounding dikegulac and ethephon in a certain proportion, there is a significant synergistic effect on the sweetness promotion rate of watermelon:

[0140] When dikegulac 50 mg / L is compounded with ethephon 50 mg / L (Example 2), and dikegulac 125 mg / L is compounded with ethephon 25 mg / L (Example 16), the sweetness promotion rate is significantly better than that of dikegulac single-agent 250, 500 mg / L and ethephon single-agent 100, 200 mg / L, and it has no effect on the leaf surface.

[0141] In summary, the combination of dikegulac and ethephon can significantly improve the fruit sweetness when used in the late stage of fruit swelling, and a low-dose combination can achieve a better sweetness-increasing effect.

Claims

1. A root promoting and sweetening agent, characterized in that: The active ingredient is composed of production-enhancing amine and indole ester in a mass ratio of (0.1~500):

1.

2. The root promoting and sweetening agent according to claim 1, characterized in that: The mass ratio of the production-increasing amine to the indole ester is (1-50):

1.

3. The root promoting and sweetening agent according to claim 1, characterized in that: The medicine is in liquid dosage form, and the content of active ingredient in the medicine is 1.1-60%.

4. The root promoting and sweetening agent according to claim 1, characterized in that: The medicament also includes an adjuvant and a solvent, wherein the solvent is one or two of ethanol, propylene glycol, dimethyl sulfoxide, and solvent oil; the adjuvant is one or two of 0P-10, alkyl glycoside, Agricultural Milk No. 500, and Agricultural Milk No.

602.

5. The root promoting and sweetening agent according to claim 1, characterized in that: When used for root promotion, the concentration of the yield-increasing amine is 1-100 mg / L, and the concentration of the indole ester is 0.02-20 mg / L; when used for sweetening, the concentration of the yield-increasing amine is 50-250 mg / L, and the concentration of the indole ester is 5-50 mg / L.

6. A root promoting and sweetening composition, characterized in that: The effective components are composed of production-increasing amine and indole ester, and the mass ratio of the production-increasing amine to indole ester is (0.1-500):

1.

7. The root promoting and sweetening composition according to claim 6, characterized in that: The mass ratio of the production-increasing amine to the indole ester is (1-50):

1.

8. The root promoting and sweetening composition according to claim 7, characterized in that: The effective ingredient content of the composition is 1.1-60%.

9. Use of the agent or composition according to any one of claims 1 to 8 in promoting plant rooting and / or increasing fruit sweetness.

10. The use according to claim 9, characterized in that: It can be used in the seedling stage to promote plant rooting, and in the fruit expansion stage to promote fruit sweetening.

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