41results about How to "Increased root length" patented technology

The invention discloses burkholderia and application thereof in tobacco growth promotion, and belongs to the technical field of microorganisms. The Burkholderia sp. XCD4 is preserved in the China Center for Type Culture Collection (CCTCC), the preservation number of the Burkholderia sp. XCD4 is CCTCC NO: M 20241837, and the preservation time of the Burkholderia sp. XCD4 is August 23, 2024. The Burkholderia cepacia XCD4 is obtained through separation for the first time, the Burkholderia cepacia XCD4 has the good capacity of dissolving phosphorus and potassium, secreting IAA, producing siderophores, producing ACC deaminase and producing gibberellin, seed germination is promoted by remarkably improving the germination rate, germination potential, seedling length and root length of seeds, plant growth can be remarkably promoted, and the yield of plants is increased. Meanwhile, enrichment of phosphorus, potassium and other elements in tobacco planting plough layer soil can be reduced, and the utilization efficiency of the fertilizer is improved, so that the application prospect is good.

The content of IAA produced by the enterobacter ludwigii XL0404 can reach 18.94 mg / L, the content of ACC deaminase produced by the enterobacter ludwigii XL0404 is 484.48 U / L, and the enterobacter ludwigii XL0404 has multiple functions of dissolving phosphorus, dissolving potassium, fixing nitrogen, producing siderophore and the like, has an inhibition effect on main root and stem disease pathogenic bacteria such as phytophthora nicotianae, rhizoctonia solani, rhizoctonia tectorum, fusarium oxysporum, fusarium solani and the like, and has an inhibition rate of 41.20-55.88%; the germination rate of the tobacco seeds is increased through treatment of the strain XL0404, and the root length is remarkably promoted; the root activity, the whole plant fresh weight, the overground fresh weight, the root fresh weight, the maximum leaf length and the maximum leaf width of the tobacco seedlings treated by the strain XL0404 with the bacterium content of 1 * 10 < 7 > cfu / mL in a seedling culture substrate are obviously higher than those of the tobacco seedlings treated by contrast treatment, and the strain XL0404 can be used as plant growth-promoting rhizobacteria and has a good application prospect in research and development of microbial fertilizers and biological prevention and control of tobacco rhizome diseases.

The invention belongs to the technical field of vegetable planting, and particularly relates to a seedling treatment composition and application thereof in improving stress resistance of solanaceous vegetables and promoting growth of the solanaceous vegetables. According to the method, solanaceous vegetable seeds are soaked in the seed treatment liquid obtained by dissolving the seedling treatment composition in water, the soaked seeds are subjected to dark culture, and the seedling treatment liquid is sprayed in the solanaceous vegetable seedling stage, so that the low temperature resistance of solanaceous vegetables can be effectively improved; the vigor of solanaceous vegetable seeds and the quality of seedlings under the low-temperature condition are improved. The test result shows that the seedling emergence potential, the seedling emergence rate and the seedling emergence index of the solanaceous vegetable seeds under the low-temperature condition can be improved and the average seedling emergence time can be shortened by using the seedling treatment liquid and culturing mode, and meanwhile, the chlorophyll content, the plant height, the root length and the fresh weight of the solanaceous vegetable seedlings under the low-temperature condition can be improved.

The invention discloses application of N-acetyl-L-cysteine in improving drought tolerance of plants, and belongs to the technical field of plant cultivation. The invention provides the application of N-acetyl-L-cysteine (N-acetyl-L-cysteine, NAC) in the improvement of the drought tolerance of the brassica napus for the first time. Experiments prove that compared with a control group, the fresh weight, the dry weight, the root length and the chlorophyll content of rape seedlings subjected to foliage spraying of 150 mu M of N-acetyl-L-cysteine under the drought stress condition are improved, the water loss rate of leaves is reduced, and the drought stress tolerance of the rape is enhanced. Therefore, the drought stress tolerance of the rape treated by the N-acetyl-L-cysteine is obviously improved. Furthermore, an optimal application concentration of 150 mu M is obtained through experimental exploration, so that the N-acetyl-L-cysteine can be optimally utilized in improving the drought stress tolerance of the oilseed rape.

The present invention discloses a new use of ccdC gene, and belongs to the technical field of microbial genetic engineering. The new use of ccdC gene disclosed by the present invention is to improve the motility of strains, reduce the wrinkling of bacterial biofilms, destroy the stability of biofilm structures, promote bacterial dispersion, promote spore formation, inhibit the growth of Nicotiana benthamiana, and inhibit the secretion of indoleacetic acid by strains; the nucleotide sequence of the ccdC gene is shown in SEQ ID NO.1. The present invention also discloses a ccdC gene mutant strain SZZ06. Compared with the wild type FZB42, the ccdC gene mutant strain SZZ06 of the present invention has reduced motility of strains, greater wrinkling of biofilms, more stable structure of biofilms, slower bacterial dispersion, less spore formation, and promotes the secretion of indoleacetic acid by strains and promotes plant growth.

The invention discloses enterobacter cloacae and application thereof in tobacco growth promotion, and belongs to the technical field of microorganisms. The enterobacter cloacae FBH1 is preserved in the China Center for Type Culture Collection (CCTCC), the preservation address is Wuhan University, Wuhan, China, the preservation number is CCTCC NO: M 20241838, and the preservation time is August 23, 2024. The enterobacter cloacae FBH1 is obtained through separation for the first time, the strain FBH1 has the good capacity of dissolving phosphorus and potassium, secreting IAA, producing siderophores and producing ACC deaminase, seed germination is promoted by remarkably improving the germination rate, germination potential, seedling length and root length of seeds, plant growth can be remarkably promoted, and the yield of plants is increased. Meanwhile, enrichment of phosphorus, potassium and other elements in tobacco planting plough layer soil can be reduced, and the utilization efficiency of the fertilizer is improved, so that the application prospect is good.

The invention discloses a synthetic functional bacterial agent and application of the synthetic functional bacterial agent in salt tolerance and growth promotion of wheat, the synthetic functional bacterial agent is prepared from five strains, namely, Gordonia hydrophora, Lysinibacillus oldseyi, planomicrobium okeanokites, Luteimonas huaabiensis and Brevibacterium epidermidis, and the bacterial agent has the remarkable characteristics of no antagonism among the strains, salt and alkali tolerance, high viable count and the like, and can be applied to salt tolerance and growth promotion of wheat. The germination rate, the seedling length and the root length of the spring wheat can be remarkably increased, and the seedling length and the root length of the winter wheat are also remarkably promoted. Under the condition of salt stress, the microbial inoculum can remarkably improve the activity of catalase, peroxidase and superoxide dismutase of wheat and the total content of chlorophyll, after microbial inoculum treatment, the content of malondialdehyde and proline of wheat is remarkably reduced, and the microbial inoculum plays a role in promoting and protecting spring wheat and winter wheat in the process of resisting saline-alkali stress and has a good application prospect. The method has an influence effect on agricultural development and sustainable development in the arid region.

The invention belongs to the technical field of microorganisms, and particularly relates to an iaam gene overexpression pseudomonas nitroreductase engineering bacterium as well as a construction method and application of the iaam gene overexpression pseudomonas nitroreductase engineering bacterium. The construction method comprises the following steps: carrying out PCR (Polymerase Chain Reaction) amplification on an iaam gene in genomic DNA (Deoxyribose Nucleic Acid) of the pseudomonas nitroreducens LSF-6 by taking genomic DNA of the pseudomonas nitroreducens LSF-6 as a template; a PCR amplification product is connected to a pBBR1MCS vector, and an iaam gene overexpression vector is constructed; and transforming the iaam gene overexpression vector into the nitroreductive pseudomonas LSF-6 to obtain the nitroreductive pseudomonas engineering bacteria for overexpressing the iaam gene. Compared with the original strain, the auxin secretion capability of the pseudomonas nitroreducens engineering strain is obviously improved. When the pseudomonas nitroreducens engineering bacteria are prepared into bacterial suspension to be applied to rice, the plant height, the root length, the overground part fresh weight, the underground part fresh weight and the chlorophyll SPAD value of the rice can be obviously increased. The invention lays a foundation for promoting rice growth by a microbiological method.

This invention belongs to the field of microbial technology, specifically relating to a strain of Acetobacter peroxide 672 and its applications. The Acetobacter peroxide 672 strain of this invention can enhance the antagonistic activity of Pichia pastoris against Rhizoctonia solani and also antagonizes Colloidal anthracnose, providing a multi-faceted solution for the biological control of crop diseases. Furthermore, the strain possesses the ability to produce indoleacetic acid, which can significantly promote the growth and development of grain crops such as wheat and corn, promote root expansion, enhance nutrient and water absorption, and thus effectively increase biomass. In addition, the strain can tolerate and degrade chemical pesticide components such as imidacloprid and carbendazim, alleviating soil pesticide residue pollution, and can effectively alleviate the inhibitory effects of low pH stress on crops, enhancing their stress resistance. Therefore, the Acetobacter peroxide 672 strain of this invention has significant application value in the biological control of crop diseases, crop growth promotion, soil pesticide residue remediation, and enhancing crop stress resistance.

The invention discloses application of bentonite-loaded calcium-iron layered double hydroxides in passivating cadmium in tomato plants. The application comprises the following steps: increasing the fresh weight and dry weight of the tomato plants planted in cadmium-polluted soil; the plant height and root length of tomato plants planted in the cadmium-polluted soil are improved; and passivating cadmium in tomato plants planted in the cadmium-polluted soil. The bentonite-loaded calcium-iron layered double hydroxide is prepared by the following method: dissolving bentonite, FeCl3. 6H2O and CaCl2 in deionized water, adding Na2CO3 and NaOH solutions while stirring, adjusting the pH to 11-13 to obtain a solid-liquid mixture, filtering after reaction to obtain a precipitate, washing with deionized water to be neutral, drying and grinding to obtain the bentonite-loaded calcium-iron layered double hydroxide. The research aims at repairing Cd-polluted soil, bentonite and layered double hydroxides widely existing in the nature are used as raw materials, CaFe-LDH (at) BT is prepared by using a coprecipitation method, and the content of available Cd in the soil can be effectively reduced by applying 0.4% of CaFe-LDH (at) BT; the dry weight and fresh weight of tomato plants are improved, the content of Cd in roots, stems, leaves and fruits of the tomato plants is effectively reduced, and the transfer coefficient of Cd in the tomato plants and the enrichment coefficient of overground parts are also reduced.

The present invention relates to the field of agricultural microbial technology, and specifically discloses a method for recruiting root endophytic fungi by a rhizobium GZHC2-2 strain and its application in alleviating sensitive soybean waterlogging stress. The rhizobium (Rhizobium multihospitium) GZHC2-2 strain was deposited in the Guangdong Provincial Microbial Culture Collection Center on January 4, 2023, with a deposit number of GDMCC No.63032. This strain has the ability to help soybeans resist waterlogging. Inoculation of the rhizobium under waterlogging stress can increase the aboveground and underground biomass, the number of nodules and the fresh weight of nodules of soybeans. At the same time, the ability of waterlogging-sensitive soybean varieties to enrich beneficial root endophytic fungi (such as Sordariomyceta, Moesziomyces, Rhynchogastremataceae, Eurotiomycetes, Ustilaginaceae) is induced. After purifying and isolating the root endophytic fungi, the enriched beneficial fungi can also significantly increase the aboveground and underground biomass, the number of nodules and the fresh weight of nodules of soybeans under waterlogging stress. The invention can be used to improve the growth and increase the yield of soybeans under waterlogging stress, and has broad application prospects.

The application belongs to the technical field of fertilizers, and particularly relates to a humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate and a preparation method thereof. The humic acid organic-inorganic compound fertilizer comprises the following raw materials in parts by weight: 22-30 parts of biogas residue, 35-55 parts of humic acid, 8-13 parts of fine columnar algae powder, 5-8 parts of urea, 12-17 parts of ammonium sulfate, 12-15 parts of superphosphoric acid calcium, 15-20 parts of potassium sulfate and 10-15 parts of slow release coating suspension. Test results show that the humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate prepared by the application can reduce the nitrogen and phosphorus release rates of the humic acid inorganic compound fertilizer, has better slow release effect, significantly promotes the plant height, stem diameter and root length of soybeans and corn, has obvious growth promotion effect, and has wide application prospect.

The invention provides application of hydroxypropyl chitosan oligosaccharide in preparation of a plant growth regulator, and belongs to the technical field of plant growth. The hydroxypropyl chitosan oligosaccharide is used as a raw material to prepare the plant growth regulator, new application of the hydroxypropyl chitosan oligosaccharide is provided, the seedling height of plants can be effectively increased, the root length can be effectively increased, the number and / or weight of root nodules can be effectively increased, the number of the root nodules of the plants and / or the activity of nitrogenase can be effectively increased, and the yield of the plants is increased. According to the present invention, the activity of glutathione reductase (GR) and / or glutathione transferase (GST) is improved so as to increase the reduced glutathione content, enhance the oxidation resistance of plants and / or enhance the salt resistance of crops, and after the compound fertilizer is compounded with the calcium-magnesium element fertilizer, the use amount of the compound fertilizer is reduced so as to provide effects of application reducing and effect increasing. The method for preparing the plant growth regulator is simple and easy to implement, environmentally friendly and convenient to popularize and apply.

The application provides a strain of protozoan nephrospora NJAU-HN1 and an application thereof, and belongs to the technical field of agricultural microorganisms. The nephrospora NJAU-HN1 has a preservation number of CCTCC NO: C2025172. The nephrospora NJAU-HN1 can directly and effectively inhibit the survival of root-knot nematodes. Application of the nephrospora NJAU-HN1 or a culture thereof can significantly promote the growth of melon plants, increase the fresh weight, dry weight and root length of the plants. The nephrospora NJAU-HN1 provided by the application provides valuable microbial resources for the development of a new microbial preparation for green prevention and control of melon root-knot nematode disease and crop health promotion, and has a good application prospect.

The invention discloses an application of Bacillus pumilus AD14 in improving saline-alkali soil and improving the resistance of soybean to saline-alkali stress, which belongs to the technical field of agricultural microorganisms. In order to screen Bacillus pumilus that can improve saline-alkali soil and significantly improve the resistance of soybean to saline-alkali stress, the invention screens a strain AD14 with good salt-alkali resistance from saline-alkali soil. The strain is identified as Bacillus pumilus ( Bacillus pumilus ), the experiment found that the strain has the growth-promoting properties of dissolving phosphorus, fixing nitrogen and producing pectinase; it can change the physical and chemical properties of saline-alkali soil, increase the activities of urease, sucrase and catalase in saline-alkali soil; improve the stress resistance of soybean in saline-alkali soil and promote the growth of soybean in saline-alkali soil. Therefore, Bacillus pumilus AD14 has broad application prospects in improving saline-alkali soil, improving the resistance of soybean to saline-alkali stress and promoting the growth and development of soybean under saline-alkali stress.

The invention provides an application of a molybdenum-regulated synergistic substance chrysin in promoting crop growth and root development, and systematically studies the influence of exogenous application of chrysin on soybean growth and on the form and content of phosphorus in soil. By comparing the difference between an experimental group and a control group, chrysin is revealed to promote the development of soybean root systems. Chrysin has positive influence on photosynthesis and physiological metabolism of soybeans, absorption and accumulation of phosphorus by the overground parts of the soybeans are remarkably improved, and the overall growth process of the soybeans is powerfully promoted.

The invention belongs to the technical field of biology, and particularly relates to a complex microbial inoculant as well as a preparation method and application thereof. The complex microbial inoculant is prepared from the following raw materials in percentage by weight: 55%-65% of complex microbial freeze-dried powder, 25%-35% of a solid-phase carrier, 5%-8% of methylcellulose, 0.1%-0.2% of cyclodextrin, 4%-6% of lignin cyclic acid sodium and 1%-2% of monopotassium phosphate, totaling 100%, the compound bacterium freeze-dried powder is prepared from compound bacteria and a compound bacterium freeze-drying protective agent in a mass ratio of 1: (4-5); the compound bacteria are composed of four kinds of bacillus amyloliquefaciens (Bacillus amyloliquefaciens), and the bacillus amyloliquefaciens (Bacillus amyloliquefaciens) is selected from the group consisting of bacillus amyloliquefaciens (Bacillus amyloliquefaciens). After the complex microbial inoculant is applied to crops, indexes such as the plant height, the root length, the whole plant fresh quality and the whole plant dry quality of the crops are all improved, so that the complex microbial inoculant can be used for improving the yield and the quality of the crops.

This invention provides a compound microbial agent, its preparation method, and its application in the control of plant root rot, belonging to the field of plant disease biological control technology. The compound microbial agent prepared by combining *Bacillus mohaiweiii* DS-L23, *Pseudomonas fluorescens* DS-PZ-L7, and *Pseudomonas aeruginosa* DS-L22 exhibits significant inhibitory effects against various plant pathogenic fungi of *Codonopsis pilosula*, including *Fusarium oxysporum*, *Fusarium solani*, *Fusarium trifidum*, *Pseudomonas heterostemum*, and *Alternaria alternata*. This compound microbial agent has advantages such as good stability and ease of cultivation. Furthermore, the construction method of the compound microbial agent is simple and easy for industrial mass production. After application, the compound microbial agent provided by this invention has a good control effect on *Codonopsis pilosula* root rot and can promote the growth of *Codonopsis pilosula* plants, reducing the use of chemical pesticides while improving the control effect.

The present application relates to the field of agricultural technology, and discloses a kind of plug seedling substrate and its preparation method and application.The plug seedling substrate includes the following components: tea dregs, coconut bran, inorganic porous material and functional liquid;Wherein, the functional liquid includes the following components: ikdoine, natamycin and polyglutamic acid.The plug seedling substrate provided by the present application provides air permeability with tea dregs, provides water retention with coconut bran, and uses inorganic porous material as the substrate framework, meeting the requirements of seedlings for substrate water retention, air permeability and root growth space, by adding functional liquid containing active ingredients ikdoine, natamycin and polyglutamic acid, while solving the three major problems of water management, disease control and root development.Plug seedling.The tea dregs after extracting tea polyphenols and coconut bran replace non-renewable peat, realizing high-value utilization of agricultural waste, and compared with non-renewable peat, the raw material cost is low and more environmentally friendly.

The present invention relates to the field of agricultural microbial technology, and specifically discloses a method for recruiting rhizosphere fungi by rhizobium GZHC2-2 strain and its application in alleviating sensitive soybean waterlogging stress. The rhizobium (Rhizobium multihospitium) GZHC2-2 strain was deposited in Guangdong Microbial Culture Collection Center on January 4, 2023, with a deposit number of GDMCC No: 63032. This strain has the ability to help soybeans resist waterlogging. Inoculation of the rhizobium under waterlogging stress can increase the aboveground and underground biomass, the number of nodules and the fresh weight of nodules of soybeans. At the same time, the ability of waterlogging-sensitive soybean varieties to enrich beneficial rhizosphere fungi (such as Dothideomyceta, Corticiales, Kondoaceae, Cryptococcaceae, Polyporales, Cladosporium) is induced. After purifying and isolating rhizosphere fungi, the enriched beneficial fungi can also significantly increase the aboveground and underground biomass, the number of nodules and the fresh weight of nodules of soybeans under waterlogging stress. The invention can be used to improve the growth and increase the yield of soybeans under waterlogging stress, and has broad application prospects.

The invention provides a muskmelon stock grafting method, which comprises the steps of stock selection, stock treatment, scion selection, grafting and management, and the stock treatment is as follows: at least one of biocontrol bacteria NBmelon-1 or Bc1-20 is adopted for shake cultivation to form a bacterial solution, and then root irrigation is performed on muskmelon stock seedlings. According to the method, the characteristics of the biocontrol bacterium NBmellon-1 and the biocontrol bacterium Bc1-20 are applied to grafting for the first time, the technical blank is filled, the new application of the biocontrol bacterium NBmellon-1 and the biocontrol bacterium Bc1-20 is developed, the stem diameter, the root length and the root number of the muskmelon stock are increased, and the problem that the grafted root system of the muskmelon stock is weak is solved.

The invention discloses a method and application of enhancing zinc tolerance of alfalfa seeds by using 24-epibrassinolide and gibberellin. A method for promoting germination and growth of alfalfa seeds under zinc stress by applying 24-epibrassinolide and gibberellin exogenously is provided. Taking alfalfa seeds as test materials, the positive effects of different concentration ratios and implementation methods of exogenous 24-epibrassinolide and gibberellin on germination characteristics, root growth and antioxidant enzyme system of alfalfa seeds under different zinc concentration stress are obtained. The different concentration ratios of exogenous 24-epibrassinolide and gibberellin and the specific method proposed can significantly improve the zinc tolerance of alfalfa seeds and promote root growth, providing technical guarantee for the promotion and planting of alfalfa in zinc-contaminated soil and the repair of zinc-contaminated soil.

The invention discloses application of streptomyces murinus JKTJ-3 in strawberry seedling culture, which is characterized in that the streptomyces murinus JKTJ-3 is used for preparing a streptomyces murinus JKTJ-3 microbial inoculum with the streptomyces spore number of 10 < 9 > cfu. G <-1 >-10 < 12 > cfu. G <-1 >, and the obtained streptomyces murinus JKTJ-3 microbial inoculum is applied to strawberry seedling culture. The streptomyces murinus JKTJ-3 microbial inoculum can significantly increase the plant height, stem diameter, root length, leaf number, biomass and the like of strawberry stock plant seedlings, and in the later strawberry stock plant transplanting propagation period, the stock plant cultivated by using the streptomyces murinus JKTJ-3 microbial inoculum has the advantages that the stolon growing time is advanced, and the growing number and the seedling number are significantly increased. Therefore, the streptomyces murinus JKTJ-3 is applied to strawberry mother plant seedling cultivation, the effect of improving the strawberry mother seedling breeding efficiency is remarkable, and the blank of a microorganism method in strawberry seedling cultivation is filled.

The application belongs to the technical field of microorganisms, and discloses a salt and alkali tolerant squirrel mammalian coccus and application thereof. Mammaliicoccus sciuri ​ STM10, which is a gram-positive coccus, has been preserved in the China General Microbiological Culture Collection Center with a preservation number of CGMCC No.38450. The strain has salt and alkali tolerance, can play the promoting functions of nitrogen fixation, phosphorus dissolution and resolution, iron carrier production and protease production, and can be prepared into microbial fertilizer. Application of the microbial fertilizer can effectively relieve salt and alkali stress, improve the seed germination and growth ability of crops, improve the physical and chemical properties of saline-alkali soil, optimize the ion environment, promote the nutrient absorption of crops, and provide support for agricultural utilization of saline-alkali land.

The present invention discloses the application of rice OsUBC48 gene or the protein encoded by it in regulating rice seed germination, and relates to the field of bioengineering technology. The base sequence of the OsUBC48 gene is shown in SEQ ID NO.1, and the amino acid sequence of the protein encoded by the OsUBC48 gene is shown in SEQ ID NO.2. By overexpressing the OsUBC48 gene in rice, the germination rate of the transgenic plant is higher than that of the wild-type strain, and the shoot length and root length of the transgenic plant are significantly higher than those of the wild-type strain.

The invention discloses a streptomyces murinus JKTJ-3 microbial inoculum and a preparation method and application thereof.The streptomyces murinus JKTJ-3 is inoculated into a solid fermentation culture medium for fermentation culture, the streptomyces murinus JKTJ-3 microbial inoculum with the streptomyces spore number reaching 1 * 10 < 9 > cfu / g-1 * 10 < 12 > cfu / g is obtained, the obtained streptomyces murinus JKTJ-3 microbial inoculum is applied to strawberry seedling raising, and the yield of strawberry seedlings is increased. The streptomyces murinus JKTJ-3 microbial inoculum can remarkably increase the plant height, stem diameter, root length, leaf number and the like of strawberry stock plant seedlings, and in the later strawberry stock plant transplanting and propagation expanding period, the stock plant cultivated by using the streptomyces murinus JKTJ-3 microbial inoculum has the advantages that the stolon growing time is advanced, and the growing number and the seedling number are remarkably increased. Therefore, the streptomyces murinus JKTJ-3 has a very good application prospect in the aspects of strawberry mother plant seedling cultivation and strawberry mother seedling breeding efficiency improvement.

The invention discloses a novel Burkholderia sp. Strain and application thereof in tobacco growth promotion, and belongs to the technical field of microorganisms. The new strain is preserved in the China Center for Type Culture Collection (CCTCC), the preservation address is Wuhan University, Wuhan, China, the preservation number is CCTCC NO: M 20252947, and the preservation time is December 18, 2025. The new Burkholderia sp. BP5 is obtained through separation for the first time, the new Burkholderia sp. BP5 has good phosphate solubilizing capacity, seed germination is promoted by remarkably improving the germination rate, germination potential, germination number and root length of seeds, plant growth can be remarkably promoted, and the yield of plants is increased. Meanwhile, the new strain BP5 has a relatively good prevention and treatment effect on plant pathogenic bacterial diseases such as rice bacterial streak, so that the new strain BP5 has a relatively good application prospect.

The present invention discloses a plant-derived growth regulator and its application in corn planting, belonging to the technical field of plant growth regulators. The growth regulator comprises the following raw materials in parts by weight: 30-50 parts of algae plant extract, 5-15 parts of microbial fermentation liquid, 1.5-2.0 parts of adjuvant, 1-3 parts of trace elements, 0.1-0.5 parts of solubilizing synergist, and 50-70 parts of water. The present invention uses spirulina powder and chlorella powder as raw materials to prepare a highly active plant active extract, and simultaneously screens and obtains two functional microorganisms to form a plant growth regulator, which can significantly improve the growth of corn root system, improve corn quality and yield, enhance soil activity, reduce the use of fertilizers and pesticides, reduce environmental pollution, and has broad application prospects.

The invention provides a compound seed soaking agent for improving germination and seedling formation of rice seeds at low temperature and a use method of the compound seed soaking agent, the compound seed soaking agent for rice comprises the following components: H2O2, salicylic acid, melatonin and glucose, and the use method of the compound seed soaking agent for rice comprises the following steps: soaking the rice seeds in a H2O2 solution for 6-8 hours; according to the rice compound seed soaking agent and the seed soaking method thereof, through the synergistic effect of H2O2, salicylic acid, melatonin and glucose, the germination rate of rice seeds under the low-temperature adverse situation can be remarkably increased, and the germination rate of the rice seeds under the low-temperature adverse situation can be remarkably increased; the bud length and the root length of the rice seeds under the low-temperature adversity are obviously increased; the quality of the rice seedlings can be further improved, the number of root systems of the rice seedlings is increased, the rice seedlings are long, germination and growth of the rice seeds under the low-temperature adversity can be well promoted, the problem of low-temperature stress in rice seedling raising or direct seeding can be solved, and the application and popularization prospects are good.

The invention relates to the field of agricultural biology, and particularly discloses a preparation method of phenylalanine (cyclo (leucine-phenylalanine) dipeptide) and application of the phenylalanine (cyclo (L-leucine-L-phenylalanine) dipeptide) in agriculture. The active ingredient of the composition comprises cyclo (L-leucine-L-phenylalanine) dipeptide Cyclo (-L-Leuu-L-Phe) obtained by fermenting and extracting external myrothecium advena CGMCC No. 42202; according to the invention, the cyclic (L-leucine-L-phenylalanine) dipeptide is scientifically compounded with different bioactive substances, and an application mode of flushing or spraying is adopted, so that the growth of crops can be effectively promoted, and the stress resistance of the crops can be enhanced. Specifically, on various crops such as corn, lettuce and tomato, the composition can significantly improve key growth indexes such as plant height, root length, stem diameter and fresh weight.