Method for low-cost restoration of Coerquin sandy land by using zoysia japonica

Abstract

The invention relates to the technical field of sand land restoration, in particular to a method for low-cost restoration of a Coerquin sand land by using zoysia japonica, which specifically comprises the following steps: cultivating grass stems, improving the deep layer of the sand land, improving the surface layer of the sand land, soaking zoysia japonica grass stem bags in thick slurry, then planting the zoysia japonica grass stem bags in straw troughs, backfilling sandy soil and compacting, and watering. The sand land restoration method is stable in restoration effect and high in survival rate, zoysia japonica bark resources are saved, a large amount of labor in the grass stem cultivation period is saved, the restoration cost is low, and sand erosion can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to a method for ecological restoration of sandy land suitable for northern my country, which uses Zoysia knotweed as a restoration plant and agricultural solid waste as an improver, and specifically relates to a method for restoring Horqin sandy land using Zoysia knotweed at low cost. Background Art

[0002] Desertification is one of the most serious ecological problems globally, making its research and control a crucial topic. Zoysia japonica, with its well-developed stolons and rhizomes, is highly drought- and heat-resistant, offering promising applications in the ecological restoration of abandoned mines, saline-alkali land, sandy soils, and areas contaminated by heavy metals.

[0003] The key difficulty in phytoremediation of exposed sandy lands lies in their poor water and fertilizer retention, coupled with their infertile soil. Furthermore, due to their large size, there is insufficient soil available for improvement, making conventional restoration methods difficult to achieve the desired results. However, phytoremediation in sandy lands requires first improving the soil to enhance its water and fertilizer retention capacity, followed by selecting suitable plants and implementing appropriate planting techniques. This approach can achieve twice the result with half the effort. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a method of using agricultural solid waste as a sand amendment and adopting Zoysia japonica asexual reproduction to carry out sand ecological restoration, which not only significantly reduces the cost but also has a long-lasting and stable restoration effect.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a method for low-cost restoration of Horqin sandy land using Zoysia japonica, the method is as follows:

[0006] 1. Grass stem cultivation

[0007] 1.1. Grass stem cultivation time: The seedling cultivation time is from early May to mid-September every year;

[0008] 1.2. Substrate preparation: Take a biodegradable geotextile bag, fill it with raw rice husks and coconut coir in sequence, and then fill it with a mixture of sand and peat soil after compacting;

[0009] 1.3. Cultivation method: Place Zoysia japonica stems evenly on the substrate prepared above, compact them and cover with a layer of raw sawdust;

[0010] 1.4. Bottling method: Take a mineral water bottle, cut off the bottom of the bottle, and make holes at equal distances around the top of the bottle near the bottle mouth. Turn the mineral water bottle upside down and put the entire geotextile bag prepared above into the mineral water bottle;

[0011] 1.5. Connect several prepared mineral water bottle devices and place them in a water container with a depth of 8-10 cm. Place them outdoors for normal growth. Refill water regularly when the container is short of water. After 25-30 days, when the grass stems have taken root and grown 1-2 new leaves, they can be planted in the sand.

[0012] 2. Sandy land improvement:

[0013] 2.1. Deep Sand Improvement: Ditch the sand once, spread raw rice husks in the ditch, and backfill the ditch with sandy soil to cover the raw rice husk layer. Ditch again in the middle of the gap between two adjacent trenches, spread dry corn stalks along the entire length of the ditch, and then backfill the ditch with sandy soil to cover the stalk layer.

[0014] 2.2. Sand surface improvement: Mix sawdust and coconut husks, then spread the mixture on the surface of the deep improved sand. Use a rotary tiller to till the mixture evenly with the top 10-12 cm of sand.

[0015] 3. Zoysia grass planting

[0016] 3.1. Making straw troughs: Weave dried straw into a single-layer straw trough without a cover.

[0017] 3.2. Digging pits and pit bottom treatment: dig pits between the gaps between each adjacent rice husk and straw deep improvement, spread dry rice straw on the pit bottom, make clay into a thin slurry, and pour it into the pit to cover the dry rice straw;

[0018] 3.3. Straw trough treatment: Use clay and water to make thick mud, immerse the processed straw trough into the mud, take it out and place it in the dug pit, so that the upper edge of the straw trough is 4-5cm higher than the pit edge;

[0019] 3.4. Planting with grass stem bags: Soak the cultivated grass stem bags in thick mud, then plant them in the straw trough, with the upper edge of the bag 2-3 cm higher than the edge of the pit, backfill with sand and compact it;

[0020] 3.5. Post-maintenance: If conditions permit, water the plants thoroughly after planting in sandy land. If conditions do not permit, plants can be planted in the rainy season without watering.

[0021] In the above-mentioned method of using Zoysia to repair the Horqin sandy land at low cost, in step 1.2, specifically, a biodegradable geotextile bag with a height of 20-25 cm and a diameter of 10-12 cm is taken, first filled with raw rice husks with a thickness of 5-7 cm, then filled with coconut coir with a thickness of 4-6 cm, and after compacting, 2 cm of a mixture of sand and peat soil in a ratio of 2:1 is added on top.

[0022] In the above-mentioned method for restoring Horqin sandy land using Zoysia japonica at low cost, step 1.3 specifically comprises placing 2-3 sections of Zoysia japonica stems, each with 1-2 nodes, evenly on the above-prepared substrate, compacting them and covering them with a layer of raw sawdust.

[0023] The above-mentioned method for low-cost restoration of Horqin sandy land using Zoysia japonica, in step 1.4, specifically, takes a 1.5L discarded mineral water bottle, cuts off the bottom of the bottle, punches three holes equidistantly around the bottle 2-3cm near the bottle mouth, each hole has a diameter of 0.5cm, inverts the mineral water bottle, puts the entire prepared geotextile bag into the mineral water bottle, with the bag mouth 1-1.5cm higher than the bottle mouth, flips the outer edge of the bag 1-1.5cm higher than the bottle mouth outward and buckles it on the bottle body, leaving a space of 5-6cm between the bottom of the bag and the bottle cap

[0024] The above-mentioned method of using Zoysia to repair Horqin sandy land at low cost, in step 2.1, the first trenching is carried out at intervals of 1-1.2m, the trench depth is 15-20cm, the width is 8-10cm, the thickness of the rice husk is 5-6cm, the second trenching is 20-25cm deep and 8-10cm wide, and two corn stalks are laid.

[0025] In the above-mentioned method for restoring Horqin sandy land using Zoysia japonica at low cost, in step 2.2, the sawdust and coconut chaff are mixed in a ratio of 1:2, and the thickness on the sandy land surface is 5-6 cm.

[0026] In the above-mentioned method for restoring Horqin sandy land using Zoysia japonica at low cost, in step 3.1, the specifications of the straw trough are 15 cm in length × 15 cm in width × 30 cm in height.

[0027] In the above-mentioned method of using Zoysia to repair Horqin sandy land at low cost, in step 3.2, the spacing between the pits is 40-50 cm, the depth of the pits is 25-30 cm, and the width is 15-20 cm. The dry rice straw is 45-50 pieces, cut into 4 sections and laid flat on the bottom of the pit.

[0028] The beneficial effects of the present invention are:

[0029] 1. Stable Restoration Effect: The technology employed in this invention not only effectively avoids the poor water and fertilizer retention characteristics of sandy soil through improvement measures, but also provides nutrients over a long period of time through the slow decomposition of applied agricultural solid waste. This ensures that the nutrients required by Zoysia japonica grass are available from planting to full maturity, eliminating the need for additional fertilizer. As a result, the restoration effect is long-lasting and stable.

[0030] 2. High survival rate and saving of Zoysia turf resources: Seedlings are bred in advance through geotextile bags and substrates, and the seedling bags are directly planted on site during restoration, avoiding the death of Zoysia turf due to drought during the period of bare-root planting, so the survival rate can reach 100%; at the same time, the grass stem propagation method follows the hole planting method, and the subsequent growth and expansion of Zoysia turf through the well-developed runners and rhizomes reaches the mature lawn, thus saving a lot of lawn resources.

[0031] 3. Save a lot of labor during the grass stem cultivation period: During the grass stem cultivation period, the seedling bag is partially immersed in a container filled with water through a mineral water bottle, which can enable the cultivation mechanism to continuously absorb water to supply Zoysia japonica. During the entire cultivation period, the container only needs to be replenished with water once, thus saving a lot of labor.

[0032] 4. Low repair cost: The substrates used in the technology of the present invention are all agricultural solid wastes, which have low purchase costs and realize the recycling of wastes, so the cost is extremely low.

[0033] 5. Avoid wind and sand erosion: By raising the upper edge of the straw trough 4-5cm above the ground surface, the erosion of wind and sand on the zoysia grass before it becomes a lawn can be effectively prevented. DETAILED DESCRIPTION

[0034] The technical solution of this embodiment includes three parts:

[0035] 1. Grass stem cultivation technology

[0036] 1. Grass stem cultivation time: The seedling cultivation time is from early May to mid-September every year.

[0037] 2. Substrate preparation: Take a biodegradable geotextile bag with a height of 20-25 cm and a diameter of 10-12 cm, first fill it with raw rice husks to a thickness of 5-7 cm, then fill it with coconut coir to a thickness of 4-6 cm, compact it, and then add 2 cm of a mixture of sand and peat soil in a ratio of 2:1 on top.

[0038] 3. Cultivation method: Place 2-3 sections of Zoysia knotweed stems evenly on the substrate prepared above, with 1-2 nodes in each section. After compacting, cover with a layer of raw sawdust with a thickness of 1 cm.

[0039] 4. Bottling method: Take a 1.5L discarded mineral water bottle, cut off the bottom of the bottle, and punch three holes equidistantly around the bottle, 2-3cm from the bottle mouth. Each hole is about 0.5cm in diameter. Turn the bottle upside down and place the prepared non-woven bag inside the bottle, with the bag opening 1-1.5cm above the bottle mouth. Turn the bag's outer edge, which is 1-1.5cm above the bottle mouth, outward and buckle it onto the bottle. Leave 5-6cm of space between the bottom of the bag and the bottle cap.

[0040] 5. Cultivation Method: Connect several prepared mineral water bottles and place them in a container filled with water to a depth of 8-10cm. Place the container outdoors for normal growth. Refill the container regularly when it becomes dry. No other cultivation measures are required. After about 25-30 days, when the grass stems have taken root and grown one or two new leaves, it can be planted in sand.

[0041] 2. Sandy Land Improvement Technology

[0042] 1. Deep improvement of sandy land: dig trenches in the sandy land at intervals of 1-1.2m, with a depth of 15-20cm and a width of 8-10cm. Take raw rice husks and spread them in the trenches with a thickness of 5-6cm. Backfill the trenches with sandy soil and cover the raw rice husk layer. Dig a second trench in the middle of the interval between two adjacent trenches with a depth of 20-25cm and a width of 8-10cm. Spread dry corn stalks in the trenches along the entire length of the trench, lay two corn stalks side by side, and then backfill the trenches with sandy soil and cover the straw layer.

[0043] 2. Improvement of the sand surface: Mix sawdust and coconut coir in a ratio of 1:2, and then spread the mixture on the surface of the deep improved sand with a thickness of 5-6 cm. Use a rotary tiller to till it and mix it evenly with the surface 10-12 cm of sand.

[0044] 3. Zoysia grass planting technology

[0045] 1. Make a straw trough: Weave dried rice straw into a single-layer straw trough without a cover. The specifications of the straw trough are 15cm × 15cm × 30cm in length × width × height.

[0046] 2. Digging and Bottom Treatment: Dig pits between adjacent rice husks and straws, with a spacing of 40-50 cm, a depth of 25-30 cm, and a width of 15-20 cm. Cut 45-50 stalks of dry rice straw into four sections and lay them flat on the bottom of the pits. Prepare a thin slurry of clay and pour it into the pits to cover the dry straw.

[0047] 3. Straw trough treatment: Use clay and water to make thick mud, immerse the processed straw trough into the mud, take it out and put it into the dug pit, so that the upper edge of the straw trough is 4-5cm higher than the edge of the pit.

[0048] 4. Planting in bags: Soak the bags of cultivated Zoysia grass in thick mud, then plant them in the straw trough, with the top edge of the bag 2-3cm higher than the edge of the pit. Backfill with sand and compact it.

[0049] 5. Post-maintenance: If conditions permit, water the plants thoroughly after planting in sandy land. If conditions do not permit, plants can be planted in the rainy season without watering.

Claims

1. A method for restoring Horqin sandy land using Zoysia japonica at low cost, characterized in that: Here’s how:

1. Grass stem cultivation 1.

1. Grass stem cultivation time: Seedling cultivation time is from early May to mid-September every year; 1.

2. Matrix preparation: Take a biodegradable geotextile bag, fill it with raw rice husk and coconut bran in turn, and then fill it with a mixture of sand and peat soil after compaction; 1.

3. Cultivation method: Place the stems of Zoysia japonica evenly on the substrate prepared above, compact them and cover them with a layer of raw sawdust; 1.

4. Bottling method: Take a mineral water bottle, cut off the bottom of the bottle, and make holes at equal distances around the top of the bottle near the bottle mouth. Place the entire geotextile bag prepared above into the mineral water bottle after each inversion of the mineral water bottle; 1.

5. Connect several prepared mineral water bottle devices and place them in a water container with a water depth of 8-10 cm. Place them outdoors for normal growth. When the container is short of water, add water regularly. After 25-30 days, when the grass stems take root and grow 1-2 new leaves, they can be planted in the sand; 2. Sand improvement: 2.

1. Deep improvement of sandy land: dig a trench in the sandy land, spread raw rice husks in the trench, and fill the trench with sandy soil to cover the raw rice husk layer; dig a trench twice in the middle of the interval between two adjacent trenches, spread dry corn stalks in the trench along the entire length of the trench, and then fill the trench with sandy soil to cover the stalk layer; 2.

2. Improvement of the sand surface: Mix sawdust and coconut bran, then spread the mixture on the surface of the deep improved sand, and use a rotary tiller to till it evenly with the surface 10-12cm sand; 3. Zoysia grass planting 3.

1. Making straw troughs: Weave dried straw into a single-layer straw trough without a cover. 3.

2. Digging pits and pit bottom treatment: dig pits between the gaps of each adjacent rice husk and straw deep improvement, spread dry rice straw on the bottom of the pit, make clay into a thin mud, pour it into the pit to cover the dry rice straw; 3.

3. Treatment of straw trough: Use clay and water to make thick mud, immerse the processed straw trough into the mud, take it out and put it into the dug pit, so that the upper edge of the straw trough is 4-5cm higher than the pit edge; 3.

4. Planting with grass stem bags: Soak the cultivated grass stem bags in thick mud, then plant them in the straw trough. The upper edge of the bag should be 2-3cm higher than the edge of the pit. Backfill with sand and compact it. 3.

5. Post-maintenance: If conditions permit, water the plants thoroughly after planting in sandy land. If conditions do not permit, plants can be planted in the rainy season without watering.

2. The method for low-cost restoration of Horqin sandy land using Zoysia japonica according to claim 1, characterized in that: In step 1.2, specifically, take a biodegradable geotextile bag with a height of 20-25 cm and a diameter of 10-12 cm, first fill it with raw rice husk with a thickness of 5-7 cm, then fill it with coconut bran with a thickness of 4-6 cm, and then add 2 cm of a mixture of sand and peat soil in a ratio of 2:1 on top after compaction.

3. The method for low-cost restoration of Horqin sandy land using Zoysia japonica according to claim 1 is characterized in that: Step 1.3 specifically includes evenly placing 2-3 sections of Zoysia knotweed stems, each section having 1-2 nodes, on the substrate prepared above, compacting them and covering them with a layer of raw sawdust.

4. The method for restoring Horqin sandy land with low cost using Zoysia japonica according to claim 1, characterized in that: In step 1.4, specifically, take a 1.5L discarded mineral water bottle, cut off the bottom of the bottle, punch three holes equidistantly around the upper part of the bottle 2-3cm near the bottle mouth, each hole has a diameter of 0.5cm, turn the mineral water bottle upside down, put the entire geotextile bag prepared above into the mineral water bottle, the bag mouth is 1-1.5cm higher than the bottle mouth, turn the outer edge of the bag 1-1.5cm higher than the bottle mouth outward and buckle it on the bottle body, leaving a space of 5-6cm between the bottom of the bag and the bottle cap.

5. The method for low-cost restoration of Horqin sandy land using Zoysia japonica according to claim 1, characterized in that: In step 2.1, the first trenching is performed at intervals of 1-1.2 m, the trench depth is 15-20 cm, the width is 8-10 cm, the thickness of the rice husk is 5-6 cm, the second trenching is performed at a depth of 20-25 cm, the width is 8-10 cm, and two strips of corn stalks are laid.

6. The method for low-cost restoration of Horqin sandy land using Zoysia japonica according to claim 1, characterized in that: In step 2.2, the sawdust and coconut bran are mixed in a ratio of 1:2, and the thickness on the sand surface is 5-6 cm.

7. The method for low-cost restoration of Horqin sandy land using Zoysia japonica according to claim 1, characterized in that: In step 3.1, the specifications of the straw trough are length×width×height: 15cm×15cm×30cm.

8. The method for low-cost restoration of Horqin sandy land using Zoysia japonica according to claim 1, characterized in that: In step 3.2, the spacing between the pits is 40-50 cm, the depth of the pits is 25-30 cm, and the width is 15-20 cm. The dry straws are 45-50 pieces, which are cut into 4 sections and laid flat on the bottom of the pits.