CN109874435B - Method for improving saline-alkali soil by using red clover and oleaster - Google Patents
Method for improving saline-alkali soil by using red clover and oleaster Download PDFInfo
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Abstract
The invention relates to the technical field of soil improvement, in particular to a method for improving saline-alkali soil by using red clover and oleaster. The invention comprises the following steps: (1) deeply ploughing and plowing the saline-alkali soil, and applying decomposed organic fertilizer as a base fertilizer; (2) sowing red clover seeds, and inoculating rhizobia and arbuscular mycorrhizal fungi; (3) after the red clover is harvested, the overground part and the main root of the red clover are removed, furrows are opened on the surface of soil, and oleaster seeds are sown. After the improvement method disclosed by the invention is used, the salt content and the pH value of the saline-alkali soil are both obviously reduced, the content of soil nutrients such as organic matters, nitrogen, phosphorus and potassium is increased, the growth of red clover and elaeagnus angustifolia is better, the economic value of the saline-alkali soil is improved while the saline-alkali soil is improved, and the improvement method has certain practical significance in production.
Description
Technical Field
The invention relates to the technical field of soil improvement, in particular to a method for improving saline-alkali soil by using red clover and oleaster.
Background
The saline-alkali soil is a general term of various saline-alkali soil, alkaline earth, salinized soil and alkalized soil, can be generally divided into 3 types of mild, moderate and severe saline-alkali soil according to the content of the saline-alkali soil in the soil, and is used as an important land resource, and the regional ecological environment and the grain production are seriously influenced by the salinization of the soil. According to the incomplete statistics of the combined country's textbook organization and the grain and agricultural organization, the global saline-alkali land area reaches 9.55 hundred million hm2And the total area of the saline-alkali soil in China is about 9914 kilohm2And 3 rd bit in the world. Saline-alkali soil mainly shows viscosity in wet condition and poor air permeability; when dry, the water permeability is hard and poor, and salt substances can seep out from the serious ground surface to directly cause withering and death of plants. The salinization of the soil can not effectively utilize large-area land, and the agriculture is seriously affectedThe industrial production and the living standard of farmers are improved. At present, due to the fact that the areas of saline-alkali soil are distributed differently, geological conditions are different, climate differences and other factors, different physicochemical characteristics of the saline-alkali soil are caused. Among many saline-alkali soil improvement measures, methods such as water conservancy engineering measures, agricultural cultivation measures, chemical modifiers and the like are generally applied, but the effect is not ideal. Chemical improvement measures can quickly change the soil structure, but can also bring about secondary pollution; agricultural measures require the expenditure of a large amount of manpower, material resources and financial resources.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a method for improving saline-alkali soil by utilizing red clover and oleaster, which comprises the steps of planting red clover in one season, inoculating rhizobia and arbuscular mycorrhizal fungi, leaving developed fibrous roots with rhizobia and mycorrhiza in soil after the red clover is harvested, taking away partial salt, and planting the oleaster, so that the survival rate and the growth amount of the oleaster can be improved, and the improvement of the saline-alkali soil is further promoted.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for improving saline-alkali soil by using red clover and oleaster comprises the following steps:
(1) deeply ploughing and plowing the saline-alkali soil, and applying decomposed organic fertilizer as a base fertilizer;
(2) sowing red clover seeds, and inoculating rhizobia and arbuscular mycorrhizal fungi;
(3) after the red clover is harvested, the overground part and the main root of the red clover are removed, furrows are opened on the surface of soil, and oleaster seeds are sown.
Further, the decomposed organic fertilizer in the step (1) comprises the following components in parts by weight: 20-40 parts of cow dung, 10-30 parts of straw, 10-30 parts of sludge, 1-10 parts of bean dregs, 1-10 parts of vinasse, 1-5 parts of tea seed cakes, 1-5 parts of bacillus subtilis and 1-5 parts of bacillus licheniformis.
Further, the sowing mode of the red clover seeds in the step (2) is broadcasting or drilling, and the row spacing of drilling is 20-40 cm.
Furthermore, the sowing quantity of the red clover seeds is 750-1000 g/mu, and the sowing depth is 1-2 cm.
Further, the inoculation method of the rhizobia in the step (2) is to dilute the rhizobia agent and then mix the diluted rhizobia agent with seeds.
Further, the inoculation method of the arbuscular mycorrhizal fungi in the step (2) is to uniformly spread the arbuscular mycorrhizal fungi inoculant on the ground and cover the ground with soil.
Preferably, the arbuscular mycorrhizal fungi is more than one of glomus terrestris, glomus intraradicans and glomus mosseae.
Further, the sowing row spacing of the narrow-leaved oleaster seeds in the step (3) is 25-30cm, and the planting spacing is 10-15 cm.
Further, after the Elaeagnus angustifolia seedlings emerge from the soil in the step (3), mint is planted among the rows, planting holes are formed at the plant spacing of 10-15cm, and 1-2 mint seedlings are planted in each hole.
Compared with the prior art, the invention has the following beneficial effects:
(1) the saline-alkali soil deep-ploughing and deep-ploughing can loosen the plough layer, break the plough bottom layer, reduce capillary action, improve the water permeability and water retention performance of soil, accelerate salt leaching of the soil, inhibit evaporation of soil water and underground water, and prevent salt accumulation on the surface layer caused by upward running of the salt of the bottom layer.
(2) After deep ploughing, decomposed organic fertilizer is applied as a base fertilizer to improve the physical structure of soil, increase porosity, accelerate the speed of salt discharge and salt washing, improve the contents of nitrogen, phosphorus and potassium and organic matters in the soil, promote the growth of crops, inhibit the adverse effect of salts on the growth of plants, reduce the evaporation capacity of soil moisture, and the bacillus subtilis and the bacillus licheniformis can improve the resistance of the crops and reduce the occurrence rate of diseases.
(3) The red clover is rich in nutrition and high in protein content, and is good leguminous forage. The root system is developed, the main root reaches 1-1.5m and has a plurality of fibrous roots, the ground coverage is large, the water and soil can be kept, and the evaporation of the water in the saline-alkali soil can be reduced. After the rhizobia is inoculated, the lateral roots of the red clover can generate a plurality of root nodules, 150kg of nitrogen can be added to the soil per hectare, and the application amount of the nitrogen fertilizer is greatly reduced, so that the deepening of the soil salinization degree is reduced. The inoculation of arbuscular mycorrhizal fungi can promote the generation of the root nodule, and can generate mycorrhiza at the root of the red clover to change the morphological structure of the root. Because the mycorrhiza has a large specific surface area, the water and nutrient absorption of the red clover can be greatly promoted, the salt absorption is promoted, and the soil alkalinity is reduced.
(4) The red clover can be mown for 4-6 times a year, and has extremely high economic value and nutritional value as pasture. After harvesting, the overground part and the main roots of the oleaster are removed, developed fibrous roots with a plurality of rhizomes and mycorrhiza are left, a large amount of organic matters can be left in soil, the survival rate of the planted oleaster can be improved, and the growth amount of the oleaster can be increased. Compared with the method of directly inoculating mycorrhizal fungi to the elaeagnus angustifolia, the method has the advantages that the content and the activity of the mycorrhizal fungi in the soil with the residual red clover stubble are higher, the planting of the elaeagnus angustifolia on the soil can accelerate the formation of mycorrhizal infection, the seedlings of the elaeagnus angustifolia are stronger, the absorption and the metabolism of the elaeagnus angustifolia to mineral elements can be improved, the content of sodium ions and chloride ions in the elaeagnus angustifolia is changed, and the element balance in the body is promoted. The method has the advantages that the permeability adjustment capability of the oleaster tissues is improved, the oleaster is more suitable for survival in saline-alkali soil, the number and activity of soil animals and microorganisms are increased through root system activity, and the activity of urease, protease, cellulase and catalase in the soil is improved, so that the content of quick-acting phosphorus and quick-acting potassium in the soil is increased, and the improvement speed of the saline-alkali soil is accelerated.
(5) After the seedlings of the narrow-leaved oleaster come out of the soil, mint is planted among rows, and the strong aromatic smell of the mint can repel adults of common narrow-leaved oleaster pests, such as longicorn, oyster scale, psylla and the like. Can also attract a plurality of beneficial insects such as bees, aphid flies, predatory bees, earthworms and the like. For example, the mint can attract parasitic wasps such as the apis cerana and the like to parasitize larvae or pupae of elaeagnus angustifolia, elaeagnus angusta and elaeagnus angustifolia, and attract small black ladybug and chrysopa perla to prey on elaeagnus angustifolia, elaeagnus angustifolia and the like, so that the occurrence of the insect damage to the elaeagnus angustifolia is greatly reduced. The mint interspecific planting of the oleaster can not only reasonably utilize the land, but also improve the total value of crops, reduce the damage of the traditional pesticide to saline-alkali soil and crops, has obvious ecological benefit and economic benefit,
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The red clover seeds, oleaster seeds, mint seedlings, rhizobium inoculant and arbuscular mycorrhizal fungi inoculant used in the following examples are all commercially available; cow dung, straws, bean dregs, vinasse and tea seed cakes in the decomposed organic fertilizer are waste materials in agricultural or industrial production, sludge is from municipal sewage treatment plants, and bacillus subtilis and bacillus licheniformis are commercially available.
Example 1
A method for improving saline-alkali soil by using red clover and oleaster comprises the following steps:
(1) deeply ploughing and loosening saline-alkali soil, and applying a decomposed organic fertilizer as a base fertilizer, wherein the decomposed organic fertilizer comprises the following components in parts by weight: 20 parts of cow dung, 25 parts of straws, 20 parts of sludge, 1 part of bean dregs, 5 parts of vinasse, 1 part of tea seed cakes, 2 parts of bacillus subtilis and 5 parts of bacillus licheniformis;
(2) sowing red clover seeds, wherein the sowing mode is broadcast sowing, the sowing quantity is 850 g/mu, the sowing depth is 1cm, and inoculating rhizobia and arbuscular mycorrhizal fungi, the inoculation method of the rhizobia is to dilute the rhizobia and mix the seeds, the inoculation method of the arbuscular mycorrhizal fungi is to uniformly spread an arbuscular mycorrhizal fungi inoculant on the ground and cover the ground with soil, and the arbuscular mycorrhizal fungi are glomus terrestris.
(3) The method comprises the steps of removing the overground part and the main root of the red clover after harvesting, ditching on the surface of soil, sowing oleaster seeds, planting mint in rows after the oleaster seedlings come out of the soil, opening planting holes with the row spacing of 10cm, and planting 1 mint seedling in each hole, wherein the row spacing is 30cm, and the plant spacing is 15 cm.
Example 2
A method for improving saline-alkali soil by using red clover and oleaster comprises the following steps:
(1) deeply ploughing and loosening saline-alkali soil, and applying a decomposed organic fertilizer as a base fertilizer, wherein the decomposed organic fertilizer comprises the following components in parts by weight: 25 parts of cow dung, 20 parts of straws, 10 parts of sludge, 5 parts of bean dregs, 10 parts of vinasse, 2 parts of tea seed cakes, 4 parts of bacillus subtilis and 1 part of bacillus licheniformis;
(2) sowing red clover seeds, wherein the sowing mode is broadcast sowing, the sowing quantity is 900 g/mu, the sowing depth is 2cm, and inoculating rhizobia and arbuscular mycorrhizal fungi, the inoculation method of the rhizobia is to dilute the rhizobia and mix the seeds, the inoculation method of the arbuscular mycorrhizal fungi is to uniformly spread an arbuscular mycorrhizal fungi inoculant on the ground and cover the ground, and the arbuscular mycorrhizal fungi are ascomyceliophthora radicata.
(3) The method comprises the steps of removing the overground part and the main root of the red clover after harvesting, ditching on the surface of soil, sowing oleaster seeds, wherein the sowing row spacing is 30cm, the plant spacing is 10cm, after the oleaster seedlings come out of the soil, interplanting mint between rows, opening planting holes with the plant spacing of 15cm, and planting 2 mint seedlings in each hole.
Example 3
A method for improving saline-alkali soil by using red clover and oleaster comprises the following steps:
(1) deeply ploughing and loosening saline-alkali soil, and applying a decomposed organic fertilizer as a base fertilizer, wherein the decomposed organic fertilizer comprises the following components in parts by weight: 30 parts of cow dung, 15 parts of straws, 30 parts of sludge, 10 parts of bean dregs, 1 part of vinasse, 3 parts of tea seed cakes, 3 parts of bacillus subtilis and 3 parts of bacillus licheniformis;
(2) sowing red clover seeds, wherein the sowing mode is broadcast sowing, the sowing quantity is 950 g/mu, the sowing depth is 1cm, and inoculating rhizobia and arbuscular mycorrhizal fungi, the inoculation method of the rhizobia is to dilute the rhizobia and mix the seeds, the inoculation method of the arbuscular mycorrhizal fungi is to uniformly spread an arbuscular mycorrhizal fungi inoculant on the ground and cover the ground, and the arbuscular mycorrhizal fungi are Sphaerotheca moschata.
(3) The method comprises the steps of removing the overground part and the main root of the red clover after harvesting, ditching on the surface of soil, sowing oleaster seeds, wherein the sowing row spacing is 25cm, the plant spacing is 15cm, interplanting mint between rows after the oleaster seedlings come out of the soil, planting holes are opened at the plant spacing of 15cm, and 1 mint seedling is planted in each hole.
Example 4
A method for improving saline-alkali soil by using red clover and oleaster comprises the following steps:
(1) deeply ploughing and loosening saline-alkali soil, and applying a decomposed organic fertilizer as a base fertilizer, wherein the decomposed organic fertilizer comprises the following components in parts by weight: 35 parts of cow dung, 20 parts of straws, 25 parts of sludge, 5 parts of bean dregs, 5 parts of vinasse, 4 parts of tea seed cakes, 4 parts of bacillus subtilis and 3 parts of bacillus licheniformis;
(2) sowing red clover seeds, wherein the sowing mode is broadcast sowing, the sowing quantity is 1000 g/mu, the sowing depth is 2cm, and inoculating rhizobia and arbuscular mycorrhizal fungi, the inoculation method of the rhizobia is to dilute the rhizobia and mix the seeds, the inoculation method of the arbuscular mycorrhizal fungi is to uniformly spread the arbuscular mycorrhizal fungi inoculant on the ground and cover the ground, and the arbuscular mycorrhizal fungi are glomus earth surface and glomus intraradicis.
(3) The method comprises the steps of removing the overground part and the main root of the red clover after harvesting, ditching on the surface of soil, sowing oleaster seeds, wherein the sowing row spacing is 25cm, the plant spacing is 10cm, interplanting mint between rows after the oleaster seedlings come out of the soil, planting holes are opened at the plant spacing of 10cm, and 2 mint seedlings are planted in each hole.
Example 5
A method for improving saline-alkali soil by using red clover and oleaster comprises the following steps:
(1) deeply ploughing and loosening saline-alkali soil, and applying a decomposed organic fertilizer as a base fertilizer, wherein the decomposed organic fertilizer comprises the following components in parts by weight: 40 parts of cow dung, 10 parts of straws, 15 parts of sludge, 10 parts of bean dregs, 1 part of vinasse, 5 parts of tea seed cakes, 5 parts of bacillus subtilis and 1 part of bacillus licheniformis;
(2) sowing red clover seeds in a manner of drilling, wherein the row spacing of drilling is 20cm, the sowing amount is 850 g/mu, the sowing depth is 1cm, and inoculating rhizobia and arbuscular mycorrhizal fungi, wherein the inoculation method of the rhizobia is to dilute the rhizobia and mix the rhizobia, the inoculation method of the arbuscular mycorrhizal fungi is to uniformly spread the arbuscular mycorrhizal fungi inoculant on the ground and cover the ground, and the arbuscular mycorrhizal fungi are glomus terrestris and glomus mosseae.
(3) The method comprises the steps of removing the overground part and the main root of the red clover after harvesting, ditching on the surface of soil, sowing oleaster seeds, wherein the sowing row spacing is 25cm, the plant spacing is 15cm, after the oleaster seedlings come out of the soil, interplanting mint between rows, opening planting holes with the plant spacing of 10cm, and planting 1 mint seedling in each hole.
Example 6
A method for improving saline-alkali soil by using red clover and oleaster comprises the following steps:
(1) deeply ploughing and loosening saline-alkali soil, and applying a decomposed organic fertilizer as a base fertilizer, wherein the decomposed organic fertilizer comprises the following components in parts by weight: 30 parts of cow dung, 30 parts of straws, 25 parts of sludge, 1 part of bean dregs, 10 parts of vinasse, 4 parts of tea seed cakes, 1 part of bacillus subtilis and 5 parts of bacillus licheniformis;
(2) sowing red clover seeds in a drill mode, wherein the row spacing of the drill is 30cm, the sowing amount is 800 g/mu, the sowing depth is 2cm, and inoculating rhizobia and arbuscular mycorrhizal fungi, wherein the inoculation method of the rhizobia is to dilute the rhizobia and mix the rhizobia with the seeds, the inoculation method of the arbuscular mycorrhizal fungi is to uniformly spread the inoculant of the arbuscular mycorrhizal fungi on the ground and cover the ground, and the arbuscular mycorrhizal fungi are ascomyces radicis and saccaromyces mosissima.
(3) The method comprises the steps of removing the overground part and the main root of the red clover after harvesting, ditching on the surface of soil, sowing oleaster seeds, wherein the sowing row spacing is 30cm, the plant spacing is 10cm, after the oleaster seedlings come out of the soil, interplanting mint between rows, opening planting holes with the plant spacing of 15cm, and planting 2 mint seedlings in each hole.
Example 7
A method for improving saline-alkali soil by using red clover and oleaster comprises the following steps:
(1) deeply ploughing and loosening saline-alkali soil, and applying a decomposed organic fertilizer as a base fertilizer, wherein the decomposed organic fertilizer comprises the following components in parts by weight: 35 parts of cow dung, 15 parts of straws, 20 parts of sludge, 5 parts of bean dregs, 1 part of vinasse, 3 parts of tea seed cakes, 2 parts of bacillus subtilis and 3 parts of bacillus licheniformis;
(2) sowing red clover seeds in a drill mode, wherein the row spacing of the drill is 40cm, the sowing amount is 750 g/mu, the sowing depth is 1cm, and inoculating rhizobia and arbuscular mycorrhizal fungi, wherein the inoculation method of the rhizobia is to dilute the rhizobia and mix the rhizobia with the seeds, the inoculation method of the arbuscular mycorrhizal fungi is to uniformly spread the arbuscular mycorrhizal fungi inoculant on the ground and cover the ground, and the arbuscular mycorrhizal fungi are glomus earth surface, glomus intraradicans and glomus mosseas.
(3) The method comprises the steps of removing the overground part and the main root of the red clover after harvesting, ditching on the surface of soil, sowing oleaster seeds, wherein the sowing row spacing is 30cm, the plant spacing is 15cm, interplanting mint between rows after the oleaster seedlings come out of the soil, planting holes are formed at the plant spacing of 15cm, and 1 mint seedling is planted in each hole.
Comparative example 1 is saline-alkali soil in which only red clover was planted.
Comparative example 2 is saline-alkali soil in which oleaster is only planted.
Comparative example 3 is saline-alkali soil for growing red clover inoculated with rhizobia and arbuscular mycorrhizal fungi.
Comparative example 4 is saline-alkali soil in which elaeagnus angustifolia was planted and arbuscular mycorrhizal fungi were directly inoculated.
Comparative example 5 is a blank control.
The soil data after each treatment was measured separately and recorded as follows:
TABLE 1 saline-alkali soil data changes under different treatments
From the data in the table, in general, the salt content and the pH value of the saline-alkali soil can be reduced by using 7 embodiments of the technical scheme of the invention, and the contents of organic matters, total nitrogen, available phosphorus and quick-acting potassium in the soil can be increased. Specifically, the organic matter of the soil is obviously increased after the decomposed organic fertilizer is used as a base fertilizer, and the contents of available phosphorus and available potassium are obviously increased; when the sowing method is used for planting the red clover, the larger the sowing amount of the red clover is, the lower the salt content and the pH value of the soil are, and the higher the organic matter content is; when the drill seeding method is used for planting the red clover, the salt content and the pH value of the soil have no obvious difference, and the drill seeding effect is not good when the seeding amount is the same. Analysis shows that when red clover is planted by the same method, the larger the seeding amount is, the more the number of rhizobia and mycorrhiza is, and the better the effect of repairing the saline-alkali soil is; the effect of improving the soil by broadcasting is better than that by drilling when the red clover is planted by different methods under the same seeding rate. The best results were obtained from the overall analysis of example 4.
TABLE 2 Elaeagnus angustifolia growth changes under different treatments
The data in the table show that compared with the oleaster which is not inoculated with the arbuscular mycorrhizal fungi, the germination rate of the oleaster inoculated with the arbuscular mycorrhizal fungi is obviously improved, the plant height and the main root length are increased, the diameter is thickened, the number of lateral roots is increased, and the mycorrhizal infection rate is also obviously increased. The germination rate, growth amount and mycorrhizal infection rate of the oleaster under the condition of direct inoculation are not as good as the effects of the oleaster planted on the soil containing the red clover stubble in the invention, wherein the three treatments of single inoculation of the mosses sacculus mildew, mixed inoculation of the earth surface sacculus mildew and the root inner sacculus mildew, and mixed inoculation of the root inner sacculus mildew and the mosses sacculus mildew are better. Comprehensive analysis shows that the method is more beneficial to the growth of elaeagnus angustifolia, thereby being beneficial to the improvement of saline-alkali soil.
TABLE 3 Elaeagnus angustifolia Pest incidence rates under different treatments
The data in the table show that compared with the oleaster which is not inoculated with the arbuscular mycorrhizal fungi, the incidence rate of five common insect pests of the oleaster after being inoculated with the arbuscular mycorrhizal fungi is reduced, because the mycorrhiza can induce the generation of signal substances in the plant body after being formed, so that the expression of genes resistant to diseases and insect pests and related defense genes can be regulated and controlled, the oleaster mycorrhizal infection rate of the arbuscular mycorrhizal fungi which is directly inoculated is low, and the corresponding insect pest resistant effect is not obvious. In examples 1 to 7, the oleaster mycorrhiza infection rate of the soil containing the red clover stubble is high, and mint is planted among the oleaster rows, and biological control is performed through the insect repelling effect and the effect of attracting natural enemies of pests of the mint, so that the incidence rate of the oleaster pests is remarkably reduced.
In conclusion, the saline-alkali soil with the improvement method provided by the invention has the advantages that the salt content and the pH value are both obviously reduced, the content of soil nutrients such as organic matters, nitrogen, phosphorus and potassium is increased, the growth of red clover and elaeagnus angustifolia is better, the incidence rate of elaeagnus angustifolia pests is low, the improvement speed of the saline-alkali soil is accelerated, the economic value of the saline-alkali soil is improved, and the method has certain practical significance in production.
Claims (10)
1. A method for improving saline-alkali soil by using red clover and narrow-leaved oleaster is characterized by comprising the following steps:
(1) deeply ploughing and plowing the saline-alkali soil, and applying decomposed organic fertilizer as a base fertilizer;
(2) sowing red clover seeds, and inoculating rhizobia and arbuscular mycorrhizal fungi;
(3) after the red clover is harvested, the overground part and the main root of the red clover are removed, furrows are opened on the surface of soil, and oleaster seeds are sown.
2. The method for improving the saline-alkali soil by utilizing the red clover and the oleaster as claimed in claim 1, wherein the decomposed organic fertilizer in the step (1) comprises the following components in parts by weight: 20-40 parts of cow dung, 10-30 parts of straw, 10-30 parts of sludge, 1-10 parts of bean dregs, 1-10 parts of vinasse, 1-5 parts of tea seed cakes, 1-5 parts of bacillus subtilis and 1-5 parts of bacillus licheniformis.
3. The method for improving saline-alkali soil by using red clover and narrow-leaved oleaster as claimed in claim 1, wherein the sowing mode of red clover seeds in step (2) is broadcast sowing or drill sowing, and the row spacing of drill sowing is 20-40 cm.
4. The method as claimed in claim 3, wherein the sowing amount of the red clover seeds is 750-1000 g/mu, and the sowing depth is 1-2 cm.
5. The method for improving saline-alkali soil by using red clover and oleaster as claimed in claim 1, wherein the rhizobium inoculation method in step (2) is to dilute the rhizobium inoculant and then dressing the diluted rhizobium inoculant with seeds.
6. The method for improving saline-alkali soil by using red clover and narrow-leaved oleaster as claimed in claim 1, wherein the inoculation method of the arbuscular mycorrhizal fungi in step (2) is to spread the inoculant of the arbuscular mycorrhizal fungi on the ground uniformly and cover the ground with soil.
7. The method for improving saline-alkali soil by using red clover and narrow-leaved oleaster as claimed in claim 6, wherein the arbuscular mycorrhizal fungi is more than one of glomus terrestris, glomus intraradices and glomus mosseae.
8. The method for improving saline-alkali soil by using red clover and elaeagnus angustifolia as claimed in claim 1, wherein the sowing row spacing of the elaeagnus angustifolia seeds in the step (3) is 25-30cm, and the planting spacing is 10-15 cm.
9. The method for improving saline-alkali soil by using red clover and elaeagnus angustifolia as claimed in claim 1, wherein mint is planted between lines after the elaeagnus angustifolia seedlings emerge from the soil in the step (3), planting holes are opened at a plant spacing of 10-15cm, and 1-2 mint seedlings are planted in each hole.
10. The method for improving saline-alkali soil by using red clover and oleaster as claimed in claim 1, comprising the steps of:
(1) deeply ploughing and plowing the saline-alkali soil, and applying decomposed organic fertilizer as a base fertilizer;
(2) sowing red clover seeds in a broadcast mode, wherein the sowing amount is 1000 g/mu, the sowing depth is 2cm, and inoculating rhizobia and arbuscular mycorrhizal fungi, the inoculation method of the rhizobia is to dilute the rhizobia and mix the seeds, the inoculation method of the arbuscular mycorrhizal fungi is to uniformly scatter an arbuscular mycorrhizal fungi inoculant on the ground and cover the ground with soil, and the arbuscular mycorrhizal fungi are glomus terrestris and glomus intraradicis;
(3) the method comprises the steps of removing the overground part and the main root of the red clover after harvesting, ditching on the surface of soil, sowing oleaster seeds, wherein the sowing row spacing is 25cm, the plant spacing is 10cm, planting mint between rows after the oleaster seedlings come out of the soil, planting holes are opened at the plant spacing of 10cm, and 2 mint seedlings are planted in each hole.
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| CN110892845A (en) * | 2019-12-06 | 2020-03-20 | 长江大学 | Method for improving citrus fruit quality by inoculating arbuscular mycorrhizal fungi |
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