CN109320355B

CN109320355B - A biologically active conditioner for improving facility soil salinization and its application

Info

Publication number: CN109320355B
Application number: CN201811412213.XA
Authority: CN
Inventors: 王光飞; 马艳; 郭德杰; 王秋君; 徐烨红; 艾玉春
Original assignee: Jiangsu Yanjiang Agricultural Science Research Institute
Current assignee: Jiangsu Yanjiang Agricultural Science Research Institute
Priority date: 2018-11-25
Filing date: 2018-11-25
Publication date: 2021-07-30
Anticipated expiration: 2038-11-25
Also published as: CN109320355A

Abstract

The invention discloses a biologically active conditioner for improving facility soil salinization. In terms of mass percentage, the conditioning agents are: 10-20% of biochar, 0.5-1% of Trichoderma viride and 0.5-1% of Bacillus amyloliquefaciens, and the balance is low-salt organic fertilizer; Facility salinized soil has obvious soil conditioning functions, which can effectively reduce soil salinity, improve soil microbial activity and diversity, increase the number of beneficial soil microorganisms, improve soil fertility and quality, and help increase production and income.

Description

Bioactive conditioner for improving facility soil salinization and application thereof

Technical Field

The invention relates to the field of soil conditioners, in particular to a bioactive conditioner for improving facility soil salinization.

Background

The cultivation area of Chinese facilities reaches 370 ten thousand hectares, and the yield exceeds 9800 million yuan. The facility cultivation has the characteristics of high multiple cropping index and large planting density, so that a large amount of fertilizer and high-nutrient organic materials are applied for a long time. The high-temperature, high-humidity and semi-closed environment of the facility causes a large amount of nutrients and other salts which are not absorbed and utilized by crops in the soil to remain in the plough layer soil, so that the secondary salinization phenomenon of the soil is serious. The living environment of soil microorganisms is damaged, the growth of beneficial microorganisms is inhibited, harmful microorganisms are easy to reproduce, microbial flora imbalance is caused, and the soil biological activity is seriously reduced. And the soil biological properties have great influence on the soil fertility quality. Therefore, the salinization of facility soil is relieved, the soil biological activity is improved, and the method has great significance for the sustainable development of facility agriculture.

Soil conditioners are used for improving physical, chemical and biological properties of soil, and various conditioners for improving soil salinization are available. CN106748540A discloses a conditioner for high-nutrient saline soil and a preparation method and application thereof, the conditioner is prepared from biochar, nonionic polyacrylamide, anionic polyacrylamide, cationic polyacrylamide, lignite and diatomite, and the content of soil salt can be reduced; CN105950159A discloses a functionalized soil conditioner and a preparation method thereof, wherein the conditioner is prepared from a soil particle interface treating agent, a functionalized additive and the like, and can relieve soil salinization; CN106588445A discloses a seaweed microorganism soil conditioner special for saline-alkali soil and a preparation method thereof, wherein the conditioner is prepared from an acidic raw material, a plant source organic matter, an animal source organic matter, a composite probiotic agent, a seaweed extract and medium trace elements, and can relieve soil salinization. Most of the soil conditioners applied to improving soil salinization are non-biological conditioners which mainly take natural minerals, artificially synthesized polymers and artificial extracts as main materials, cannot effectively improve the biological properties of soil and have limitations. Studies of Zhangfu and Yangqian show that the biochar can reduce the content of soil salt and improve soil microorganisms, but the single application of the biochar has short timeliness and has certain side effects on yield and certain soil properties in certain cases. CN107382453A discloses a soil sterilization regeneration anti-continuous cropping obstacle composition, which is prepared from yeast, bacillus, trichoderma, gliocladium, organic catalytic substance, mineralizer, surfactant and organic biomass as raw materials, and the conditioner can relieve soil salinization and change soil microorganism, but because of containing natural minerals and surfactant, salinization of soil can be intensified at a later stage. Secondly, there is a certain environmental risk, the natural mineral has a high heavy metal content and the released cations may have a long-term toxic effect on the soil, and the surfactant degradation substances may have a harmful effect on the soil, plants, groundwater, and the like. On the other hand, the conditioner can reduce the number of pathogenic bacteria of soil-borne diseases, but cannot improve the activity and diversity of soil microorganisms.

CN106365892A discloses a soil conditioner for improving and restoring soil and an application thereof, wherein the conditioner is prepared from decomposed organic materials, phosphogypsum and bacillus amyloliquefaciens, and can improve the biological activity of the soil; the zhanghui research shows that the carbonized rice hull composite soil conditioner improves the micro-ecological environment of the soil; the Liujie test data show that the conditioner consisting of the biological rice chaff and the gypsum can improve the microbial activity of soil; heroic research shows that the soil conditioner prepared from organic and inorganic materials as main raw materials and mineral substances such as dolomite and feldspar can improve the functional diversity of soil microflora. However, the current soil conditioner for improving soil biological properties cannot improve soil salinization. Therefore, the development of green bioactive conditioners for salinization of facility soil and poor biological properties is required and has become a focus of research in the field.

Disclosure of Invention

Aiming at the salinization and biological character degradation of facility soil at present, the invention provides a biological activity conditioner for improving the salinization of the facility soil, the conditioner is prepared by taking a low-salt high-quality organic fertilizer, biochar, a high-biological activity trichoderma fungicide and a bacillus fungicide as raw materials, has the advantages of sufficient raw materials, low cost, easy implementation, environmental protection and the like, can obviously reduce the salt content of the facility soil, improves the microbial activity and the microbial flora of the soil, and increases the crop yield.

In order to realize the purpose, the invention firstly provides a bioactive conditioner for improving facility soil salinization, and the soil conditioner comprises the following raw materials: according to the mass percentage, the biochar accounts for 10-20 percent, and the trichoderma viride TV41 microbial inoculum (the bacterial content is more than 2 multiplied by 10)⁹CFU/g) accounts for 0.5-1%, and Bacillus amyloliquefaciens BS211 microbial inoculum (the bacterial content is more than 4 multiplied by 10)⁹CFU/g) accounts for 0.5-1 percent, and the balance is low-salt organic fertilizer; the technical indexes of the low-salt organic fertilizer are as follows: the organic content (calculated on a dry basis) is more than or equal to 45 percent; the content (calculated on a dry basis) of nitrogen, phosphorus pentoxide and potassium oxide is more than or equal to 5 percent; the water content is less than or equal to 30 percent; the pH value is 6.5-8.5;

in the invention, the low-salt organic fertilizer can be a commercially available product such as a traditional Chinese medicine residue organic fertilizer, a straw organic fertilizer, a mushroom residue organic fertilizer and the like, or an organic fertilizer obtained by taking traditional Chinese medicine residue, mushroom residue and straw as raw materials and performing high-temperature fermentation and after-ripening fermentation decomposition (the decomposition method is shown in Shandong province local standard DB 37T 2248 and 2012), and the aim of the invention can be achieved as long as the low-salt organic fertilizer is ensured to meet the technical indexes.

Further, in the bioactive conditioner for improving facility soil salinization disclosed by the invention, the biochar is commercial biochar or a solid product obtained by carbonizing agricultural production organic waste at the temperature of 300-; the agricultural production organic waste comprises at least one of corn straw, corncob, wheat straw, rice hull and soybean straw.

Further, in the bioactive conditioner for improving facility soil salinization disclosed by the invention, the trichoderma viride TV41 microbial inoculum is obtained by the following method:

a) inoculating Trichoderma viride TV41 strain to potato glucose agar culture medium, and culturing at 28 deg.C for 3 days; then transferring the Trichoderma viride strain to a potato glucose liquid culture medium, wherein the liquid loading amount is 80m1/250m1, and then carrying out shake cultivation at 28 ℃ for 3-4 days at the rotation speed of 160rpm of a shaking table;

b) inoculating 10% (volume/mass ratio, ml/kg) of the sterilized bran and straw with water content of 60% after the culture is finished, and culturing at 28 +/-2 ℃ for 5-7 days until sporulation is produced;

c) naturally air drying Trichoderma viride and bran or oven drying at 30 deg.C, pulverizing, and sieving with 10 mesh sieve to obtain Trichoderma viride TV41 microbial inoculum with bacteria content of more than 2 × 10⁹CFU/g。

Further, in the bioactive conditioner for improving facility soil salinization disclosed by the invention, the bacillus amyloliquefaciens BS211 microbial inoculum is obtained by the following steps:

a) inoculating bacillus amyloliquefaciens BS211 into a beef extract peptone agar culture medium, and culturing for 3 days at 32 ℃; then transferring the bacillus amyloliquefaciens strain into a beef extract peptone liquid culture medium, wherein the liquid loading is 80m1/250m1, and then carrying out shake cultivation at 32 ℃ for 3-5 days at the rotation speed of 160rpm of a shaker;

b) inoculating 10% (volume/mass ratio, ml/kg) of the sterilized bran and straw with water content of 60% after the culture is finished, and culturing at 32 +/-2 ℃ for 3-5 days until sporulation is produced;

c) will solveNaturally air drying the bacillus amyloliquefaciens and bran and straws or drying the straws at 40 ℃, crushing the straws and sieving the straws with a 10-mesh sieve to obtain the bacillus amyloliquefaciens BS211 microbial inoculum with the bacterial content of more than 4 multiplied by 10⁹CFU/g。

The invention further provides an application of the soil conditioner in improving the soil of the salinization facility, and the application method comprises the following steps: uniformly spreading the soil conditioner in the facility soil with the dosage of 300-.

Furthermore, the facility soil is preferably sunlight greenhouse or greenhouse soil with salt content of 2.0-6.0 g/kg.

The applicant obtains the biological activity conditioner for salinization of green improved facility soil through multiple formula improvement, pot culture experiments and field experiments, can improve a microflora and biological activity, balance soil nutrients, reduce the total salt content of the soil, relieve continuous cropping obstacles and improve the yield and quality of crops, and has the following beneficial effects compared with the prior art:

(1) meanwhile, the method has the functions of reducing facility soil salinization and improving soil biological activity.

(2) The invention has reasonable raw material compounding, and each raw material has specific functions: the low-salt decomposed organic fertilizer is not easy to increase the salt content of soil, effectively increases the organic matter content and active substances of the soil, and is a good living organic carrier of effective bacteria; the biochar can improve the organic carbon content of soil, improve the water and fertilizer retention performance of the soil, improve the buffering capacity of the soil on high salinity and acidification, has large specific surface area, and can provide living space for beneficial microorganisms; the TV41 microbial inoculum and the BS211 microbial inoculum have high effective microbial activity, can effectively improve soil microflora, improve soil bioactivity and inhibit pathogenic microorganisms, and in addition, a large number of metabolites in the microbial inoculum have the effects of promoting crop growth and inhibiting pathogenic microorganisms.

(3) The fertilizer is applied to soil as a base fertilizer, and the application amount of organic materials and fertilizers is effectively reduced.

(4) The invention has sufficient main raw materials and low price, and the field application method is simple, thus being an environment-friendly conditioner for preventing and controlling continuous cropping obstacles of greenhouse vegetables.

Drawings

FIG. 1 is a photograph of Trichoderma TV41 after 3 days of growth on medium of different pH.

FIG. 2 is a photograph of Trichoderma TV41 grown on a medium with different salt concentrations for 2 days.

FIG. 3 is a graph showing the spore yield of Trichoderma TV41 after 3 days of growth on media of different pH.

FIG. 4 is a graph showing the spore yield of Trichoderma TV41 after 2 days of growth on media with different salt concentrations.

FIG. 5 is a schematic diagram showing the viable count of Bacillus BS211 after 3 days of culture in liquid media of different pH values.

FIG. 6 is a schematic diagram showing viable count of Bacillus BS211 after 3 days of culture in liquid media with different salt concentrations.

FIG. 7 is a photograph of growth-promoting potted plants from TV41 Trichoderma inoculum in soil of different salt concentrations.

FIG. 8 is a schematic diagram showing the effect of Trichoderma TV41 on the fresh weight of plants on the ground in soils with different salt concentrations.

FIG. 9 is a schematic representation of the effect of TV41 Trichoderma inoculum on the underground fresh weight of plants in soils of different salinity.

FIG. 10 is a photograph of a growth-promoting potted landscape of plants prepared by compounding TV41 microbial inoculum and BS211 microbial inoculum in salinized soil.

FIG. 11 is a schematic diagram showing the effect of the compounding of the TV41 microbial inoculum and the BS211 microbial inoculum on the fresh weight of plants above and below the ground in salinized soil.

Detailed Description

The technology related to the present invention will be further described with reference to specific examples.

The examples relate to media and strains:

potato dextrose agar medium: peeling 200g potato, cutting into pieces, cooking for 30min, filtering with four layers of gauze to obtain filtrate, adding 20g glucose, diluting to 1L, adding 20g agar, and sterilizing at 121 deg.C for 30 min.

Potato dextrose liquid medium: peeling 200g potato, cutting into pieces, cooking for 30min, filtering with four layers of gauze to obtain filtrate, adding 20g glucose, diluting to 1L, and sterilizing at 121 deg.C for 30 min.

Beef extract peptone agar medium: 5g of beef extract, 10g of peptone, 5g of NaCl, 20g of agar and 1L of water, and the pH value is 7.2-7.4. Sterilizing at 121 deg.C for 30 min.

Beef extract peptone liquid medium: 5g of beef extract, 10g of peptone, 5g of NaCl, 1L of water and 7.2-7.4 of pH. Sterilizing at 121 deg.C for 30 min.

The preparation method of the solid culture medium of bran and rice straw comprises mixing bran and rice straw (length less than 4mm) at a mass ratio of 9:1, adding water to make water content in the mixture 60%, sterilizing at 126 deg.C for 60min, and cooling.

Trichoderma viride (Trichoderma harzianum) used in the examples was Trichoderma viride TV41 strain with a collection number of CGMCC No.9293, as disclosed in document 104982198A and provided by the academy of agricultural sciences of Jiangsu province.

The Bacillus amyloliquefaciens (Bacillus amyloliquefaciens) BS211 strain used in the examples (see the literature, "antagonistic activity and potting control effect of Bacillus amyloliquefaciens (Bacillus amyloliquefaciens) BS211 in watermelon", Mayan et al, Jiangsu agricultural bulletin, 2006) was provided by the agricultural academy of Jiangsu province.

The examples relate to the starting materials:

the low-salt organic fertilizer is purchased from Chinese medicine residue organic fertilizer of mucelis fertilizer industry ltd in Jiangsu province; the organic content (calculated on a dry basis) is more than or equal to 45 percent; the content (calculated on a dry basis) of nitrogen, phosphorus pentoxide and potassium oxide is more than or equal to 5 percent; the water content is less than or equal to 30 percent; the pH value is 6.5-8.5.

Biochar: purchased from Li Yang Shang De Sheng active carbon factory, is rice straw and rice hull biochar.

Example 1 determination of acid and salt resistance of Trichoderma viride TV41 bacteria

Inoculating Trichoderma viride TV41 strain into potato glucose agar culture medium with pH of 3, 4, 5, 6, 7, 8, 9, 10, 11 in sequence, and culturing at 28 deg.C for 3 days, wherein the photograph of the culture dish is shown in FIG. 1; as shown in FIG. 3, the total number of spores on the medium was determined, and it can be seen that the Trichoderma reesei (TV 41) produced large amount of spores under acidic condition of pH4-5, which can reach 2.9 × 10⁹Above CFU.

Trichoderma viride TV41 strain was inoculated into potato dextrose agar medium with salt concentration (salinity adjusted by NaCl reagent) of 0%, 0.6%, 1.2%, 1.8%, 2.4%, 3%, 3.6%, 4.2%, 4.8%, and cultured at 28 deg.C for 2 days, and the photograph of the dish is shown in FIG. 2; the results of detecting the total number of spores on the culture medium and the amount of spores are shown in FIG. 4, and it can be seen that the amount of spores produced by Trichoderma TV41 at 1.2% salt concentration is relatively large, and is substantially consistent with the amount of spores produced at 0% salt concentration.

Example 2 determination of acid and salt resistance of Bacillus amyloliquefaciens BS211 bacteria

The number of viable bacteria detected after the bacillus amyloliquefaciens BS211 strain is inoculated into beef extract peptone culture media with different pH values and cultured for 3 days at 30 ℃ is shown in figure 5, the number of viable bacteria cultured by the bacillus amyloliquefaciens BS211 strain under the acidic condition of pH4-5 can still be larger and can reach 5.1 multiplied by 10⁸Above CFU.

In addition, the BS211 strain is inoculated into beef extract peptone culture media with different salt concentrations (the salt concentration is adjusted by NaCl reagent) and cultured for 3 days at 30 ℃, and then the viable count is detected, and the detection result is shown in figure 6, so that the viable count of the BS211 bacillus cultured under the salt concentration of 3% is still high and is basically consistent with the viable count under the salt concentration of 0%.

Example 3 preparation of Trichoderma viride TV41 inoculum

a) Inoculating the Trichoderma viride TV41 strain preserved on the inclined plane into a potato glucose agar culture medium, and culturing at 28 ℃ for 3 days to generate green conidia; and inoculating the trichoderma viride mycelia with conidia into a potato glucose liquid culture medium, wherein the liquid filling amount of the liquid culture medium is 80m1/250m1, and 3 trichoderma viride mycelia with the diameter of 8mm are inoculated into each bottle. Then culturing at 28 deg.C with shaking table rotation speed of 160rpm for 3-4 days to obtain mycelium solution.

b) Inoculating 80ml of trichoderma mycelium liquid into 1.5kg of sterilized bran and straw solid culture medium, uniformly stirring under aseptic condition, spreading the solid culture in a shallow tray (the shallow tray is soaked in formalin solution overnight for airing), wherein the thickness is 3-5cm, spreading filter cloth subjected to high-pressure sterilization treatment below the shallow tray, covering double layers of gauze subjected to high-pressure sterilization treatment above the shallow tray, and culturing at 28 +/-2 ℃ for 5-7 days until spore production is complete.

c) Naturally air drying Trichoderma viride and wheat bran or oven drying at 30 deg.C until water content is less than 10%, pulverizing, and sieving with 10 mesh sieve to obtain Trichoderma viride TV41 microbial inoculum with bacteria content of more than 2 × 10⁹CFU/g。

Example 4 preparation of Bacillus amyloliquefaciens BS211 inoculant

a) Streaking and inoculating the bacillus amyloliquefaciens BS211 strain stored on the inclined plane into a beef extract peptone agar culture medium, and culturing for 2 days at 32 ℃; then, the bacterium blocks with the BS211 colonies are inoculated into a beef extract peptone liquid medium, the liquid loading capacity of the liquid medium is 80m1/250m1, and 3 bacterium blocks are inoculated in each bottle. Then culturing for 3-5 days at 32 ℃ and 180rpm of a shaking table to obtain a bacterial liquid.

b) Inoculating 80ml of cultured bacillus liquid into 1.5kg of sterilized bran and straw solid culture medium, uniformly stirring under aseptic condition, spreading the solid culture in a shallow tray (the shallow tray is soaked in formalin solution overnight for airing) with the thickness of 3-5cm, spreading filter cloth subjected to high-pressure sterilization treatment below the shallow tray, covering double layers of gauze subjected to high-pressure sterilization treatment above the shallow tray, and culturing at 32 +/-2 ℃ for 4-6 days until spore production is complete.

c) Naturally air drying Bacillus together with bran and straw or oven drying at 40 deg.C until water content is less than 10%, pulverizing, and sieving with 10 mesh sieve to obtain Bacillus amyloliquefaciens BS211 microbial inoculum with bacterial content of more than 4 × 10⁹CFU/g。

Example 5 growth promoting effects of Trichoderma viride TV41 microbial inoculum on tomatoes in saline soil

NaCl is added into the plough layer soil until the NaCl concentration in the soil is 0 percent (CK), 0.2 percent, 0.4 percent, 0.6 percent and 0.8 percent, the soil with the salt concentration is divided into two groups, 0 percent (control group) and 1 percent (experimental group) of the trichoderma viride TV41 microbial inoculum prepared in the example 3 are respectively added in mass percent, and the potted landscape after 30 days of planting the tomatoes is shown in figure 7.

The results of the above-ground fresh weight and the underground fresh weight of the tomato are shown in fig. 8 and fig. 9, the trichoderma can obviously promote the above-ground and underground parts of tomato plants in the soil with 0-0.8% of NaCl concentration, and the higher the NaCl concentration is, the more obvious the promotion effect is.

Example 6 growth promoting action of Trichoderma viride TV41 microbial inoculum and Bacillus amyloliquefaciens BS211 microbial inoculum on pepper in salinized soil

Taking plough layer soil, adding NaCl until the NaCl concentration in the soil is 0.8%, and dividing the treatment into four treatments: the method comprises the steps of (1) adding no fungicide (CK), preparing 1% of bacillus amyloliquefaciens BS211 fungicide by mass percent in the addition example 4 (control group 1), preparing 1% of trichoderma viride TV41 fungicide by mass percent in the addition example 3 (control group 2), simultaneously adding 1% of BS211 fungicide by mass percent and 1% of TV41 fungicide by mass percent (experimental group), and planting pepper for 30 days, wherein the pot culture scene is shown in figure 10.

The results of the aboveground fresh weight and underground fresh weight of the pepper are shown in fig. 11, and the pepper plants treated by the aseptic agent have extremely poor growth and high mortality rate. The BS211 microbial inoculum and the TV41 microbial inoculum which are independently applied have better growth promotion effect on pepper plants, the BS211 microbial inoculum and the TV41 microbial inoculum are applied in a compounding way, the effect is best, the growth promotion effect on the pepper plants is very obvious, and the death rate is low.

Example 7 application in greenhouse amaranth soil

Uniformly mixing 90kg of traditional Chinese medicine residue organic fertilizer, 10kg of charcoal, 0.5kg of trichoderma viride TV41 microbial inoculum and 0.5kg of bacillus amyloliquefaciens BS211 microbial inoculum to prepare the soil conditioner.

Selecting a greenhouse with green vegetables in a sky, blue and earth green vegetable production base in a tin-free urban area, wherein the service life of the greenhouse is more than 8 years. The experiment set up 2 treatments: conventional treatments and soil conditioner treatments. Each processing 3 repeated cells with a cell area of 6m²And are randomly arranged. The conventional treatment of 15-15-15 compound fertilizer is 30 kg/mu, and the soil conditioner treatment conditioner is 300 kg/mu. And (5) uniformly spreading the amaranth seeds on the soil surface, fully ploughing, watering until the maximum water holding capacity of the field is reached, and planting the amaranth seeds after keeping moisture for 10 days. The results are shown in tables 1 and 2.

Table 1 shows that the soil conditioner has the effect on the yield of amaranth and the salt content of soil

The results in table 1 show that, compared with the conventional control, the soil conditioner can significantly reduce the content of soluble salt in soil by 17.1% and increase the yield of amaranth by 17.5%.

TABLE 2 influence of soil conditioners on the number of bacteria, number of fungi, number of beneficial bacteria, microbial activity and microbial diversity in facility amaranth soil

The results in Table 2 show that the number of bacteria increased by 18.9% and the number of fungi decreased by 15.6% for the soil conditioner treatment, indicating that the soil conditioner inhibited soil mycosis and increased the bacteria fraction. In addition, the conditioner treated trichoderma increased by 4.75 × 10²CFU/g, the number of bacillus increased by 0.77X 10⁶CFU/g, which indicates that the application of conditioner is beneficial for increasing the number of soil-beneficial microorganisms. Biolog carbon source utilization detection of AWCD values can be a sensitive indicator of microbial activity. Therefore, the conditioner also has a remarkable promoting effect on the activity and the microbial diversity of soil microorganisms. The increase of beneficial microorganisms in the soil is beneficial to promoting plants to absorb nutrients, so that the salt content of the soil is reduced, and healthy disease-inhibiting soil is formed.

Example 8 application in greenhouse Chinese little greens soil

90kg of straw organic fertilizer, 10kg of charcoal, 0.5kg of trichoderma viride TV41 microbial inoculum and 0.5kg of bacillus amyloliquefaciens BS211 microbial inoculum are mixed uniformly to prepare the soil conditioner.

Selecting a greenhouse with the service life of more than 10 years in the vegetable production base of the longevity river in the Wuxi city mountainous area. The experiment set up 2 treatments: conventional treatments and soil conditioner treatments. Each processing 3 repeated cells with a cell area of 6m²And are randomly arranged. The conventional treatment of 15-15-15 compound fertilizer is 30 kg/mu, and the soil conditioner treatment conditioner is 300 kg/mu. And (3) uniformly spreading the water on the soil surface, fully ploughing, watering until the maximum water holding capacity of the field is reached, and planting the Chinese little greens after keeping moisture for 10 days. The results are shown in tables 3 and 4.

TABLE 3 soil conditioner on Chinese little greens yield and soil salinity

The results in table 3 show that, compared with the conventional control, the soil conditioner can significantly reduce the content of soluble salt in soil by 13.3% and increase the yield of the Chinese little greens by 24.5%.

TABLE 4 influence of soil conditioners on the number of bacteria, number of fungi, number of beneficial bacteria, microbial activity and microbial diversity in the soil of greenhouse salsola gallica

The results in table 4 show that the soil biological properties can be significantly improved by applying the soil conditioner. The soil conditioner treatment significantly increased the number of bacteria, trichoderma and bacillus, and inhibited soil mycosis compared to the conventional control. In addition, the soil conditioner treatment microbial activity and microbial diversity were also higher than the conventional controls.

Example 9 application in solar greenhouse tomato soil

80kg of traditional Chinese medicine residue organic fertilizer, 20kg of charcoal, 1kg of trichoderma viride TV41 microbial inoculum and 1kg of bacillus amyloliquefaciens BS211 microbial inoculum are uniformly mixed to prepare the soil conditioner.

Selecting a facility tomato greenhouse with the service life of more than 8 years in the vegetable production bases of Shuzhou suining county, Shuichouzhen village. The experiment set up 2 treatments: conventional treatments and soil conditioner treatments. Each treated 3 repeat cells, with a cell area of 0.25 mu, randomly arranged. Spreading 15-15-15 compound fertilizer on the ridges in the conventional treatment mode, wherein the using amount is 50 kg/mu. The conditioner is spread on the soil conditioner treatment ridges, and the dosage is 500 kg/mu. And uniformly spreading on the upper surface of the ridge, fully ploughing, watering until the maximum water holding capacity of the field is reached, and planting the tomatoes after keeping moisture for 10 days. The results are shown in tables 5 and 6.

TABLE 5 soil conditioner on tomato yield, tomato disease and soil salinity

The results in Table 5 show that compared with the conventional control, the soil conditioner can obviously reduce the content of soluble salt in the soil by 28.1 percent, reduce the incidence rate of leaf mold by 75.1 percent and increase the tomato yield by 51.3 percent.

TABLE 6 influence of soil conditioners on the number of bacteria, number of fungi, number of beneficial bacteria, microbial activity and microbial diversity in tomato soil of a facility

The results in Table 6 show that the soil conditioner treatment increased the number of bacteria and Trichoderma by 38.5% and 80.4%, respectively, and the fungus decreased by 22.9%, as compared to the conventional control. In addition, conditioner treatments may also increase soil microbial activity (FDAH enzyme) and microbial diversity.

In specific implementation, the low-salt organic fertilizer can be a commercial product of Chinese medicine residue organic fertilizer (come fertilizer industry ltd. good in Jiangsu province), mushroom residue organic fertilizer (Nanjing Ning grain bio-fertilizer company) and straw organic fertilizer (Nanjing Mingzhu fertilizer ltd. company), or an organic fertilizer which is prepared by taking Chinese medicine residue, mushroom residue and straw as raw materials and fully decomposed through high-temperature fermentation and after-ripening fermentation, as long as the low-salt organic fertilizer meets the following technical indexes: the organic content (calculated on a dry basis) is more than or equal to 45 percent; the content (calculated on a dry basis) of nitrogen, phosphorus pentoxide and potassium oxide is more than or equal to 5 percent; the water content is less than or equal to 30 percent; the pH value is 6.5-8.5, and the aim of the invention can be achieved.

The biochar can be selected from a commercially available product, and can also be prepared by crushing a solid product obtained by carbonizing agricultural production organic waste (such as at least one of corn straw, corncob, wheat straw, rice hull and soybean straw) at 600 ℃ and sieving the crushed solid product with a 40-mesh sieve.

Claims

1. A biologically active conditioner for improving soil salinization in facilities, comprising the following raw materials, in terms of mass percentage, biochar accounts for 10-20%, Trichoderma viride TV41 bacterial agent accounts for 0.5-1%, Bacillus amyloliquefaciens BS211 The bacterial agent accounts for 0.5-1%, and the balance is low-salt organic fertilizer; the bacterial content of the Trichoderma viride TV41 bacterial agent is greater than 2×10 ⁹ CFU/g; the bacterial content of the Bacillus amyloliquefaciens BS211 bacterial agent More than 4×10 ⁹ CFU/g.

2 . The biologically active conditioner for improving soil salinization in a facility according to claim 1 , wherein the biochar is obtained by the following method: a solid product obtained by carbonizing agricultural organic waste at 300-600° C. 3 . , the biochar is obtained after crushing to 40 meshes; the organic waste in agricultural production includes at least one of corn straw, corn cob, wheat straw, rice straw, rice husk, and soybean straw.

3. the biologically active conditioner of improving facility soil salinization according to claim 1, is characterized in that, described Trichoderma viride TV41 microbial inoculum is obtained by the following method:

a) Inoculate Trichoderma viride TV41 into potato dextrose agar medium and cultivate at 28°C for 3 days; then transfer Trichoderma viride strain into potato dextrose liquid medium with a liquid volume of 80m1/250m1, and then at 28 Cultivated in a shaker for 3-4 days at a temperature of 160 rpm to obtain a primary culture product of Trichoderma viride TV41;

b) The primary medium of Trichoderma viride TV41 was placed in the bran straw with a moisture content of 60% after sterilization at 10% inoculum, and cultured at 28±2°C for 5-7 days to obtain Trichoderma viride TV41 culture product;

c) The Trichoderma viride TV41 culture product is naturally air-dried or dried at 30°C, and pulverized through a 10-mesh sieve to obtain the Trichoderma viride TV41 inoculum.

4. The biologically active conditioner for improving facility soil salinization according to claim 1, wherein the Bacillus amyloliquefaciens BS211 microbial inoculum is obtained as follows:

a) Bacillus amyloliquefaciens BS211 was inoculated into beef extract peptone agar medium, cultured at 32°C for 3 days, and then transferred to beef extract peptone liquid medium with a liquid volume of 80m1/250m1, and then shaken at 32°C The bed is cultured for 3-5 days, and the rotating speed of the shaker is 160rpm to obtain the primary culture product of Bacillus amyloliquefaciens BS211;

b) Insert the primary culture product of Bacillus amyloliquefaciens BS211 into bran straw with a moisture content of 60% after sterilization at 10% inoculum, and cultivate at 32±2°C for 3-5 days to obtain Bacillus amyloliquefaciens BS211 culture product;

c) Naturally air-drying the cultured product of Bacillus amyloliquefaciens BS211 or drying at 40° C., and pulverizing it through a 10-mesh sieve to obtain the Bacillus amyloliquefaciens BS211 inoculum.

5. The application of the bioactive conditioner for improving the salinization of facility soil according to any one of claims 1-4 in improving the soil of salinization facility.

6. application according to claim 5, it is characterised in that concrete steps are as follows: evenly spread the biologically active conditioner in the facility soil, the dosage is 300-500kg/mu, and water to the maximum water holding capacity in the field after fully ploughing , the soil is moistened for 10-15 days before planting vegetables, that is, the improvement of the soil of the salinization facility is completed.

7 . The application according to claim 6 , wherein the facility soil refers to solar greenhouse soil or greenhouse soil with a salt content of 2.0-6.0 g/kg. 8 .