Disclosure of Invention
Aiming at the technical current situations that the existing domestic method for planting apocynum in saline-alkali soil has low seed emergence rate, low seedling survival rate and long seedling planting life, the invention aims to provide the apocynum cultivation method suitable for the area with heavy saline-alkali soil, a series of technical means such as nutrient soil preparation, water selection method seed selection, sowing, water spraying, seedling hardening, fertilization, field planting with soil, laying and drip irrigation are adopted, the seed emergence rate is as high as 92.5%, the survival rate of seedlings after being transplanted to a field is up to 95.6%, the apocynum seeding and field planting can be realized in the same year, the seedling planting life is effectively shortened, the apocynum coverage rate in the next year can reach 80%, the plant height is more than 80cm on average, and the method has wide practicability in the technical field of agricultural planting.
The invention aims to realize the technical purpose, provides a apocynum venetum cultivation method suitable for heavy saline alkali areas, and specifically comprises the following steps:
(1) a greenhouse is selected to be provided with ventilation openings, a temperature adjusting and fluorescent lamp device is arranged in the greenhouse, and the top of the greenhouse is made of light-transmitting materials.
(2) Collecting black soil fermented from rotten leaves in ten centimeters of the surface layer of a forest land, stacking and decomposing the excrement of the livestock and poultry, and mixing the black soil and the decomposed excrement with the ratio of 3: 1, and putting into a nutrition pot.
(3) Selecting seeds by a water selection method, primarily selecting full seeds, putting the primarily selected seeds into water with the salt content of 0.2%, standing for 3-5min, removing the seeds floating on the water surface by a 270-mesh screen, and reserving the seeds sinking into the water, wherein the weight of each thousand seeds is required to be 350 mg.
(4) Spraying the soil in the nutrition pots thoroughly before sowing, requiring the soil humidity to reach 90-95%, sowing 5-6 seeds in each nutrition pot, covering soil with thickness of 1cm, spraying water immediately after sowing, spraying the surface soil thoroughly, adjusting the temperature in the greenhouse to 25-30 ℃, and closing the ventilation opening.
(5) Spraying water 4-5 times per day after sowing, wherein the soil humidity is required to be 90-95%, reducing the water spraying frequency when 3-4 pairs of true leaves grow out of apocynum venetum seedlings, spraying water 2-3 times per day, gradually reducing the soil humidity to 60-80%, adjusting the indoor temperature to 20-23 ℃, adjusting the daily illumination time to 3-4h, and performing illumination treatment by using a fluorescent lamp when the sun is insufficient.
(6) After 30 days, when the 5 th to 6 th pairs of true leaves grow out of the apocynum venetum seedlings, carrying out seedling identification treatment, spraying water to the nutrition pots, wetting to be standard, pulling out short seedlings, and keeping 2-3 seedlings in each nutrition pot.
(7) And (3) hardening the seedlings for 5 days, opening a window of the greenhouse, gradually reducing the temperature to room temperature, gradually increasing the time for receiving natural light, and spraying water once in 1-2 days until no water is sprayed in the last day.
(8) After the hardening-seedling is finished, selecting and reserving apocynum venetum seedlings with 5-6 pairs of needles and 8-10cm of plant height.
(9) The land is prepared in a place with wide terrain, sufficient sunlight, loose soil, convenient irrigation and good drainage, and viscous soil is not selected.
(10) Laying a drip pipe belt after land preparation, beginning to drip irrigation, wherein the interval between drip irrigation openings is 1.5m, opening a hole at the drip irrigation position, the diameter of the hole opening is 50cm, the depth of the hole is 50cm, pouring 2kg of fertilizer into the hole, and uniformly mixing the fertilizer with soil, wherein the fertilizer is prepared by mixing black soil and decomposed excrement by 3: 1 by weight ratio.
(11) Removing the nutrition pot, planting with soil, wherein the plant spacing is required to be 1.5-2m, the row spacing is required to be 3-3.5m, and drip irrigation is carried out for 1.5h after planting, wherein the soil humidity is required to reach 40%.
(12) After field planting, carrying out drip irrigation once every 15 days, wherein the drip irrigation time is 2h each time, when the plant height is 20-25cm, preventing spot blight, adding 600 and 800 times of liquid of 50% of bacteria removing agent during drip irrigation, and carrying out drip irrigation for 3 times.
(13) The whole plant is cut off at the position just before the first year of winter, and the root in the soil is reserved for overwintering treatment.
In the invention, the nutrition pot is 10cm high and 10cm in diameter, and a small hole is arranged at the bottom.
In the invention, the temperature range of water is 18-20 ℃ when the water selection method is adopted for seed selection.
In the present invention, preferably, 6 seeds are sown in each nutrition pot. The temperature in the greenhouse was adjusted to 28 ℃.
In the invention, preferably, water is sprayed for 4 times a day after sowing, the soil humidity is required to be 95%, when 3-4 pairs of true leaves grow out of apocynum venetum seedlings, the water spraying frequency is reduced, the water is sprayed for 2 times a day, the soil humidity is gradually reduced to 70%, the indoor temperature is adjusted to be 23 ℃, and the daily illumination time is adjusted to be 4 hours.
In the invention, the field planting with soil requires the plant spacing to be 2m and the row spacing to be 3.5 m.
By implementing the specific invention content of the invention, the following effects can be achieved:
the invention aims to provide a apocynum cultivation method suitable for heavy saline alkali areas, a series of technical means such as nutrient soil preparation, seed selection by a water selection method, sowing, water spraying, seedling hardening, fertilization, field planting with soil, laying and drip irrigation are adopted, the emergence rate of seeds is as high as 92.5%, the survival rate of seedlings after being transplanted to a field is as high as 95.6%, the sowing and field planting of apocynum can be realized in the same year, the seedling field planting age is effectively shortened, the coverage rate of apocynum in the next year can reach 80%, the average height of plants is more than 80cm, and the apocynum cultivation method has wide practicability in the technical field of agricultural planting.
Detailed Description
The present invention will be described below by way of examples, but the present invention is not limited to the following examples.
The raw materials and reagents used in the invention are 50% of sterile and can be purchased from the market.
The apparatus used in the present invention:
in the following description, unless otherwise specified,% refers to m/m mass%, and all reagents, materials and apparatuses used in the present invention are well known and available from the market, but the present invention is not limited thereto, and other reagents and apparatuses well known in the art may be applied to the practice of the following embodiments of the present invention.
The first embodiment is as follows:
the invention provides a apocynum venetum cultivation method suitable for heavy saline alkali areas, which specifically comprises the following steps:
(1) a greenhouse is selected to be provided with ventilation openings, a temperature adjusting and fluorescent lamp device is arranged in the greenhouse, and the top of the greenhouse is made of light-transmitting materials.
(2) Collecting black soil fermented from rotten leaves in ten centimeters of the surface layer of a forest land, stacking and decomposing the excrement of the livestock and poultry, and mixing the black soil and the decomposed excrement with the ratio of 3: 1, and putting into a nutrition pot.
(3) Selecting seeds by a water selection method, primarily selecting full seeds, putting the primarily selected seeds into water with the salt content of 0.2%, standing for 3-5min, removing the seeds floating on the water surface by a 270-mesh screen, and reserving the seeds sinking into the water, wherein the weight of each thousand seeds is required to be 350 mg.
(4) Spraying the soil in the nutrition pots thoroughly before sowing, requiring the soil humidity to reach 90-95%, sowing 5-6 seeds in each nutrition pot, covering soil with thickness of 1cm, spraying water immediately after sowing, spraying the surface soil thoroughly, adjusting the temperature in the greenhouse to 25-30 ℃, and closing the ventilation opening.
(5) Spraying water 4-5 times per day after sowing, wherein the soil humidity is required to be 90-95%, reducing the water spraying frequency when 3-4 pairs of true leaves grow out of apocynum venetum seedlings, spraying water 2-3 times per day, gradually reducing the soil humidity to 60-80%, adjusting the indoor temperature to 20-23 ℃, adjusting the daily illumination time to 3-4h, and performing illumination treatment by using a fluorescent lamp when the sun is insufficient.
(6) After 30 days, when the 5 th to 6 th pairs of true leaves grow out of the apocynum venetum seedlings, carrying out seedling identification treatment, spraying water to the nutrition pots, wetting to be standard, pulling out short seedlings, and keeping 2-3 seedlings in each nutrition pot.
(7) And (3) hardening the seedlings for 5 days, opening a window of the greenhouse, gradually reducing the temperature to room temperature, gradually increasing the time for receiving natural light, and spraying water once in 1-2 days until no water is sprayed in the last day.
(8) After the hardening-seedling is finished, selecting and reserving apocynum venetum seedlings with 5-6 pairs of needles and 8-10cm of plant height.
(9) The land is prepared in a place with wide terrain, sufficient sunlight, loose soil, convenient irrigation and good drainage, and viscous soil is not selected.
(10) Laying a drip pipe belt after land preparation, beginning to drip irrigation, wherein the interval between drip irrigation openings is 1.5m, opening a hole at the drip irrigation position, the diameter of the hole opening is 50cm, the depth of the hole is 50cm, pouring 2kg of fertilizer into the hole, and uniformly mixing the fertilizer with soil, wherein the fertilizer is prepared by mixing black soil and decomposed excrement by 3: 1 by weight ratio.
(11) Removing the nutrition pot, planting with soil, wherein the plant spacing is required to be 1.5-2m, the row spacing is required to be 3-3.5m, and drip irrigation is carried out for 1.5h after planting, wherein the soil humidity is required to reach 40%.
(12) After field planting, carrying out drip irrigation once every 15 days, wherein the drip irrigation time is 2h each time, when the plant height is 20-25cm, preventing spot blight, adding 600 and 800 times of liquid of 50% of bacteria removing agent during drip irrigation, and carrying out drip irrigation for 3 times.
(13) The whole plant is cut off at the position just before the first year of winter, and the root in the soil is reserved for overwintering treatment.
In the embodiment, the nutrition pot is 10cm high and 10cm in diameter, and a small hole is arranged at the bottom.
In the embodiment, the temperature range of water is 18-20 ℃ when the water selection method is adopted for seed selection.
In this embodiment, preferably, 6 seeds are sown in each nutrition pot. The temperature in the greenhouse was adjusted to 28 ℃.
In the embodiment, preferably, water is sprayed for 4 times a day after sowing, the soil humidity is required to be 95%, when 3-4 th paired true leaves grow out of apocynum venetum seedlings, the water spraying frequency is reduced, water is sprayed for 2 times a day, the soil humidity is gradually reduced to 70%, the indoor temperature is adjusted to be 23 ℃, and the daily illumination time is adjusted to be 4 hours.
In this example, field planting with soil requires a plant spacing of 2m and a row spacing of 3.5 m.
By using the method provided by the embodiment, the apocynum venetum can be artificially planted in the heavy saline-alkali wasteland, and the method has important significance for improving saline-alkali soil and promoting ecological construction in arid regions.
Example two:
in 2015 for 3 months, apocynum venetum is planted in Kashshikul dry-weight saline-alkali soil test field No. 1, and a place with wide terrain, sufficient sunlight, loose soil, convenient irrigation and good drainage is selected, instead of viscous soil. The greenhouse is required to be provided with ventilation openings, a temperature adjusting and fluorescent lamp device is arranged in the greenhouse, and the top of the greenhouse is made of light-transmitting materials. Collecting black soil fermented from rotten leaves in ten centimeters of the surface layer of an oasis forest, stacking and decomposing the excrement of livestock and poultry, and mixing the black soil and the decomposed excrement with the ratio of 3: 1, and filling the mixture into a nutrition pot, wherein the nutrition pot is full of eight parts. Selecting seeds by a water selection method, primarily selecting full seeds, putting the primarily selected seeds into water with the salt content of 0.2%, standing for 3min, removing the seeds floating on the water surface by using a 270-mesh screen, and reserving the seeds sinking into the water, wherein the weight of each thousand seeds is required to be 340 mg. And (3) spraying the soil in the nutrition pots thoroughly before sowing, requiring that the soil humidity reaches 90%, sowing 5 seeds in each nutrition pot, covering soil with the thickness of 1cm, spraying water immediately after sowing, spraying surface layer soil thoroughly, adjusting the temperature in the shed to 25 ℃, and closing a ventilation opening. Spraying water 4 times a day after sowing, wherein the soil humidity is required to be 90%, reducing the water spraying frequency when 3-4 pairs of true leaves grow out of the apocynum venetum seedlings, spraying water 2 times a day, gradually reducing the soil humidity to 60%, adjusting the indoor temperature to 20 ℃, adjusting the daily illumination time to 3h, and performing illumination treatment by using a fluorescent lamp when the sun illumination is insufficient. After 30 days, when the 5 th to 6 th pairs of true leaves grow out of the apocynum venetum seedlings, carrying out seedling identification treatment, spraying water to the nutrition pots, wetting to be standard, pulling out short and small seedlings, and keeping 2-3 seedlings in each nutrition pot. And (3) hardening the seedlings for 5 days, opening a window of the greenhouse, gradually reducing the temperature to room temperature, gradually increasing the time for receiving natural light, and spraying water once in 1 day until no water is sprayed in the last day. After the hardening-seedling is finished, selecting and reserving apocynum venetum seedlings with 5-6 pairs of needles and 8-10cm of plant height. Laying a drip pipe belt after land preparation, beginning to drip irrigation, wherein the interval between drip irrigation openings is 1.5m, opening a hole at the drip irrigation position, the diameter of the hole opening is 50cm, the depth of the hole is 50cm, pouring 2kg of fertilizer into the hole, and uniformly mixing the fertilizer with soil, wherein the fertilizer is prepared by mixing black soil and decomposed excrement by 3: 1 by weight ratio. Removing the nutrition pot, planting with soil, wherein the plant spacing is required to be 1.5-2m, the row spacing is required to be 3-3.5m, and drip irrigation is carried out for 1.5h after planting, wherein the soil humidity is required to reach 40%. After field planting, carrying out drip irrigation once every 15 days, wherein the drip irrigation time is 2h each time, when the plant height is 20-25cm, preventing spot blight, adding 600 and 800 times of liquid of 50% of bacteria removing agent during drip irrigation, and carrying out drip irrigation for 3 times. The whole plant is cut off at the position just before the first year of winter, and the root in the soil is reserved for overwintering treatment.
Example three:
in 2015 for 3 months, apocynum venetum is planted in Kashshikul dry-weight saline-alkali soil test field No. 2, and a place with wide terrain, sufficient sunlight, loose soil, convenient irrigation and good drainage is selected, instead of viscous soil. The greenhouse is required to be provided with ventilation openings, a temperature adjusting and fluorescent lamp device is arranged in the greenhouse, and the top of the greenhouse is made of light-transmitting materials. Collecting black soil fermented from rotten leaves in ten centimeters of the surface layer of an oasis forest, stacking and decomposing the excrement of livestock and poultry, and mixing the black soil and the decomposed excrement with the ratio of 3: 1, and filling the mixture into a nutrition pot, wherein the nutrition pot is full of eight parts. Selecting seeds by a water selection method, primarily selecting full seeds, putting the primarily selected seeds into water with the salt content of 0.2%, standing for 4min, removing the seeds floating on the water surface by using a 270-mesh screen, and reserving the seeds sinking into the water, wherein the weight of each thousand seeds is required to be 340 mg. Spraying soil thoroughly in the nutrition pots before sowing, requiring that the soil humidity reaches 92%, sowing 5 seeds in each nutrition pot, covering soil with the thickness of 1cm, spraying water immediately after sowing, spraying surface soil thoroughly, adjusting the temperature in the shed to 28 ℃, and closing the ventilation opening. Spraying water 5 times a day after sowing, wherein the soil humidity is required to be 92%, reducing the water spraying frequency when 3-4 pairs of true leaves grow out of the apocynum venetum seedlings, spraying water 2 times a day, gradually reducing the soil humidity to 75%, adjusting the indoor temperature to 22 ℃, adjusting the daily illumination time to 3.5h, and performing illumination treatment by using a fluorescent lamp when the sun illumination is insufficient. After 30 days, when the 5 th to 6 th pairs of true leaves grow out of the apocynum venetum seedlings, carrying out seedling identification treatment, spraying water to the nutrition pots, wetting to be standard, pulling out short and small seedlings, and keeping 2-3 seedlings in each nutrition pot. And (3) hardening the seedlings for 5 days, opening a window of the greenhouse, gradually reducing the temperature to room temperature, gradually increasing the time for receiving natural light, and spraying water once in 1 day until no water is sprayed in the last day. After the hardening-seedling is finished, selecting and reserving apocynum venetum seedlings with 5-6 pairs of needles and 8-10cm of plant height. Laying a drip pipe belt after land preparation, beginning to drip irrigation, wherein the interval between drip irrigation openings is 1.5m, opening a hole at the drip irrigation position, the diameter of the hole opening is 50cm, the depth of the hole is 50cm, pouring 2kg of fertilizer into the hole, and uniformly mixing the fertilizer with soil, wherein the fertilizer is prepared by mixing black soil and decomposed excrement by 3: 1 by weight ratio. Removing the nutrition pot, planting with soil, wherein the plant spacing is required to be 1.5-2m, the row spacing is required to be 3-3.5m, and drip irrigation is carried out for 1.5h after planting, wherein the soil humidity is required to reach 40%. After field planting, carrying out drip irrigation once every 15 days, wherein the drip irrigation time is 2h each time, when the plant height is 20-25cm, preventing spot blight, adding 600 and 800 times of liquid of 50% of bacteria removing agent during drip irrigation, and carrying out drip irrigation for 3 times. The whole plant is cut at the near place before the first year of winter, and the root in the soil is reserved.
Example four:
in 2015 for 3 months, apocynum venetum is planted in Kashshikul dry-weight saline-alkali soil test field No. 3, and a place with wide terrain, sufficient sunlight, loose soil, convenient irrigation and good drainage is selected, instead of viscous soil. The greenhouse is required to be provided with ventilation openings, a temperature adjusting and fluorescent lamp device is arranged in the greenhouse, and the top of the greenhouse is made of light-transmitting materials. Collecting black soil fermented from rotten leaves in ten centimeters of the surface layer of an oasis forest, stacking and decomposing the excrement of livestock and poultry, and mixing the black soil and the decomposed excrement with the ratio of 3: 1, and filling the mixture into a nutrition pot, wherein the nutrition pot is full of eight parts. Selecting seeds by a water selection method, primarily selecting full seeds, putting the primarily selected seeds into water with the salt content of 0.2%, standing for 5min, removing the seeds floating on the water surface by using a 270-mesh screen, and reserving the seeds sinking into the water, wherein the weight of each thousand seeds is required to be 350 mg. Spraying soil thoroughly in the nutrition pots before sowing, requiring that the soil humidity reaches 91%, sowing 5 seeds in each nutrition pot, covering soil with the thickness of 1cm, spraying water immediately after sowing, spraying surface layer soil thoroughly, adjusting the temperature in the greenhouse to 29 ℃, and closing the ventilation opening. Spraying water 4 times a day after sowing, wherein the soil humidity is required to be 91%, reducing the water spraying frequency when 3-4 pairs of true leaves grow out of the apocynum venetum seedlings, spraying water 3 times a day, gradually reducing the soil humidity to 75%, adjusting the indoor temperature to 22 ℃, adjusting the daily illumination time to 4h, and performing illumination treatment by using a fluorescent lamp when the sun illumination is insufficient. After 30 days, when the 5 th to 6 th pairs of true leaves grow out of the apocynum venetum seedlings, carrying out seedling identification treatment, spraying water to the nutrition pots, wetting to be standard, pulling out short and small seedlings, and keeping 2-3 seedlings in each nutrition pot. And (3) hardening the seedlings for 5 days, opening a window of the greenhouse, gradually reducing the temperature to room temperature, gradually increasing the time for receiving natural light, and spraying water once in 2 days until no water is sprayed in the last day. After the hardening-seedling is finished, selecting and reserving apocynum venetum seedlings with 5-6 pairs of needles and 8-10cm of plant height. Laying a drip pipe belt after land preparation, beginning to drip irrigation, wherein the interval between drip irrigation openings is 1.5m, opening a hole at the drip irrigation position, the diameter of the hole opening is 50cm, the depth of the hole is 50cm, pouring 2kg of fertilizer into the hole, and uniformly mixing the fertilizer with soil, wherein the fertilizer is prepared by mixing black soil and decomposed excrement by 3: 1 by weight ratio. Removing the nutrition pot, planting with soil, wherein the plant spacing is required to be 1.5-2m, the row spacing is required to be 3-3.5m, and drip irrigation is carried out for 1.5h after planting, wherein the soil humidity is required to reach 40%. After field planting, carrying out drip irrigation once every 15 days, wherein the drip irrigation time is 2h each time, when the plant height is 20-25cm, preventing spot blight, adding 600 and 800 times of liquid of 50% of bacteria removing agent during drip irrigation, and carrying out drip irrigation for 3 times. The whole plant is cut at the near place before the first year of winter, and the root in the soil is reserved.
Example five:
in 2015 for 3 months, apocynum venetum is planted in Kashshikul dry-weight saline-alkali soil test field No. 4, and a place with wide terrain, sufficient sunlight, loose soil, convenient irrigation and good drainage is selected, instead of viscous soil. The greenhouse is required to be provided with ventilation openings, a temperature adjusting and fluorescent lamp device is arranged in the greenhouse, and the top of the greenhouse is made of light-transmitting materials. Collecting black soil fermented from rotten leaves in ten centimeters of the surface layer of an oasis forest, stacking and decomposing the excrement of livestock and poultry, and mixing the black soil and the decomposed excrement with the ratio of 3: 1, and filling the mixture into a nutrition pot, wherein the nutrition pot is full of eight parts. Selecting seeds by a water selection method, primarily selecting full seeds, putting the primarily selected seeds into water with the salt content of 0.2%, standing for 5min, removing the seeds floating on the water surface by using a 270-mesh screen, and reserving the seeds sinking into the water, wherein the weight of each thousand seeds is required to be 340 mg. Spraying soil thoroughly in the nutrition pots before sowing, requiring that the soil humidity reaches 95%, sowing 6 seeds in each nutrition pot, covering soil with the thickness of 1cm, spraying water immediately after sowing, spraying surface layer soil thoroughly, adjusting the temperature in the greenhouse to 21 ℃, and closing the ventilation opening. Spraying water 4 times a day after sowing, wherein the soil humidity is required to be 95%, reducing the water spraying frequency when 3-4 pairs of true leaves grow out of the apocynum venetum seedlings, spraying water 3 times a day, gradually reducing the soil humidity to 78%, adjusting the indoor temperature to 21 ℃, adjusting the daily illumination time to 3h, and performing illumination treatment by using a fluorescent lamp when the sun illumination is insufficient. After 30 days, when the 5 th to 6 th pairs of true leaves grow out of the apocynum venetum seedlings, carrying out seedling identification treatment, spraying water to the nutrition pots, wetting to be standard, pulling out short and small seedlings, and keeping 2-3 seedlings in each nutrition pot. And (3) hardening the seedlings for 5 days, opening a window of the greenhouse, gradually reducing the temperature to room temperature, gradually increasing the time for receiving natural light, and spraying water once in 2 days until no water is sprayed in the last day. After the hardening-seedling is finished, selecting and reserving apocynum venetum seedlings with 5-6 pairs of needles and 8-10cm of plant height. Laying a drip pipe belt after land preparation, beginning to drip irrigation, wherein the interval between drip irrigation openings is 1.5m, opening a hole at the drip irrigation position, the diameter of the hole opening is 50cm, the depth of the hole is 50cm, pouring 2kg of fertilizer into the hole, and uniformly mixing the fertilizer with soil, wherein the fertilizer is prepared by mixing black soil and decomposed excrement by 3: 1 by weight ratio. Removing the nutrition pot, planting with soil, wherein the plant spacing is required to be 1.5-2m, the row spacing is required to be 3-3.5m, and drip irrigation is carried out for 1.5h after planting, wherein the soil humidity is required to reach 40%. After field planting, carrying out drip irrigation once every 15 days, wherein the drip irrigation time is 2h each time, when the plant height is 20-25cm, preventing spot blight, adding 600 and 800 times of liquid of 50% of bacteria removing agent during drip irrigation, and carrying out drip irrigation for 3 times. The whole plant is cut at the near place before the first year of winter, and the root in the soil is reserved.
Example six:
in 2015 for 3 months, apocynum venetum is planted in Kashshikul dry saline-alkali soil test field No. 5 (typical heavy saline-alkali soil with average salt content of more than 7.0), and a place with wide terrain, sufficient sunlight, loose soil, convenient irrigation and good drainage is selected, and viscous soil is not selected. The greenhouse is required to be provided with ventilation openings, a temperature adjusting and fluorescent lamp device is arranged in the greenhouse, and the top of the greenhouse is made of light-transmitting materials. Collecting black soil fermented from rotten leaves in ten centimeters of the surface layer of an oasis forest, stacking and decomposing the excrement of livestock and poultry, and mixing the black soil and the decomposed excrement with the ratio of 3: 1, and filling the mixture into a nutrition pot, wherein the nutrition pot is full of eight parts. Selecting seeds by a water selection method, primarily selecting full seeds, putting the primarily selected seeds into water with the salt content of 0.2%, standing for 5min, removing the seeds floating on the water surface by using a 270-mesh screen, and reserving the seeds sinking into the water, wherein the weight of each thousand seeds is required to be 350 mg. Spraying soil thoroughly in the nutrition pots before sowing, requiring that the soil humidity reaches 95%, sowing 6 seeds in each nutrition pot, covering soil with the thickness of 1cm, spraying water immediately after sowing, spraying surface layer soil thoroughly, adjusting the temperature in the greenhouse to 30 ℃, and closing the ventilation opening. Spraying water 5 times a day after sowing, wherein the soil humidity is required to be 95%, reducing the water spraying frequency when 3-4 pairs of true leaves grow out of the apocynum venetum seedlings, spraying water 3 times a day, gradually reducing the soil humidity to 80%, adjusting the indoor temperature to 23 ℃, adjusting the daily illumination time to 4h, and performing illumination treatment by using a fluorescent lamp when the sun illumination is insufficient. After 30 days, when the 5 th to 6 th pairs of true leaves grow out of the apocynum venetum seedlings, carrying out seedling identification treatment, spraying water to the nutrition pots, wetting to be standard, pulling out short and small seedlings, and keeping 2-3 seedlings in each nutrition pot. And (3) hardening the seedlings for 5 days, opening a window of the greenhouse, gradually reducing the temperature to room temperature, gradually increasing the time for receiving natural light, and spraying water once in 2 days until no water is sprayed in the last day. After the hardening-seedling is finished, selecting and reserving apocynum venetum seedlings with 5-6 pairs of needles and 8-10cm of plant height. Laying a drip pipe belt after land preparation, beginning to drip irrigation, wherein the interval between drip irrigation openings is 1.5m, opening a hole at the drip irrigation position, the diameter of the hole opening is 50cm, the depth of the hole is 50cm, pouring 2kg of fertilizer into the hole, and uniformly mixing the fertilizer with soil, wherein the fertilizer is prepared by mixing black soil and decomposed excrement by 3: 1 by weight ratio. Removing the nutrition pot, planting with soil, wherein the plant spacing is required to be 1.5-2m, the row spacing is required to be 3-3.5m, and drip irrigation is carried out for 1.5h after planting, wherein the soil humidity is required to reach 40%. After field planting, carrying out drip irrigation once every 15 days, wherein the drip irrigation time is 2h each time, when the plant height is 20-25cm, preventing spot blight, adding 600 and 800 times of liquid of 50% of bacteria removing agent during drip irrigation, and carrying out drip irrigation for 3 times. The whole plant is cut at the near place before the first year of winter, and the root in the soil is reserved.
Example seven:
taking karshshistol dry saline-alkali soil (average salt content is more than 8.5 of typical heavy saline-alkali soil) as an apocynum venetum growth test area, wherein the test area is 50 mu, planting apocynum venetum in salinized desert land by adopting the method disclosed by the embodiment of the invention, counting the seed emergence rate and the seedling survival rate in a greenhouse in the current year, counting the apocynum venetum coverage rate and the plant height in the next year by plant clumps, and specifically, the following results are obtained:
table 1: index for growing apocynum venetum under different cultivation methods
As can be seen from Table 1, the apocynum venetum is planted in the saline desert land by adopting the method disclosed by the embodiment of the invention, the emergence rate of the seeds reaches more than 92.5%, the survival rate of seedlings after the apocynum venetum is transplanted to a field in the same year is up to 95.6%, the apocynum venetum is sown and planted in the same year, the planting age limit of the seedlings is effectively shortened, the coverage rate of the apocynum venetum in the next year can reach 80%, the height of the plants is more than 80cm on average, and the method has a remarkable technical effect in the technical field of agricultural planting. Therefore, the apocynum venetum cultivation method suitable for the heavy saline alkali area is feasible in technology and has considerable demonstration and popularization prospects.
Through the series of embodiments, a series of technical means such as nutrient soil preparation, water selection method seed selection, sowing, water spraying, seedling hardening, fertilization, field planting with soil, laying and drip irrigation are adopted, the apocynum venetum cultivation method suitable for the heavy saline-alkali area is provided, the apocynum venetum cultivation method is suitable for typical heavy saline-alkali soil with average salt content of more than 8.5, the seedling field planting age is effectively shortened, the coverage rate of the apocynum venetum in the next year can reach 80%, the plant height is more than 80cm on average, and the apocynum venetum cultivation method has a remarkable technical effect in the technical field of agricultural planting.
As described above, the present invention can be preferably implemented, and the above-mentioned embodiments only describe the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various changes and modifications of the technical solution of the present invention made by those skilled in the art without departing from the design spirit of the present invention shall fall within the protection scope defined by the present invention.