Planting method for interplanting green bristlegrass and radix bupleuri in arid region

Abstract

The invention belongs to the technical field of plant cultivation, and particularly relates to a planting method for interplanting green bristlegrass with radix bupleuri in an arid region, which comprises the following steps: early-stage preparation: selecting a land with higher terrain and good drainage, deeply ploughing, watering, fertilizing, leveling and finely raking, and making a flat furrow with the width of 1.2-1.5 m; the radix bupleuri is sown in the first ten days of May, drilling is adopted, the line spacing is 25-30 cm, the ditch depth is 1-2 cm, and soil covering and pressure clearing are conducted after sowing; seedling emergence, thinning, final singling and topdressing of radix bupleuri in the middle of June; the green bristlegrass is sown while the radix bupleuri is sown, broadcast sowing is adopted, the sowing row is located between two rows of the radix bupleuri, the row spacing is consistent with that of the radix bupleuri, the ditch depth is 1-2 cm, and soil covering and light pressing are conducted after sowing; thinning after setaria viridis seedlings emerge, and cutting off upper stem leaves; harvesting green bristlegrass: harvesting seeds when the green bristlegrass is mature at the end of July and the beginning of August; harvesting the radix bupleuri: harvesting the radix bupleuri after the radix bupleuri grows for 2-3 years. By adopting the method, wind prevention and sand fixation in the arid region are realized, and convenient conditions are provided for growth of radix bupleuri in the arid region.

Description

Technical Field

[0001] This invention belongs to the field of plant cultivation technology, specifically relating to a planting method of intercropping Bupleurum chinense with Setaria viridis in arid regions.

[0002] Bupleurum is a general term for various plants in the genus Bupleurum of the Apiaceae family, including Northern Bupleurum and Southern Bupleurum. Its dried root is used medicinally, possessing the effects of harmonizing the exterior and interior, soothing the liver, and raising yang. It is used for colds with fever, alternating chills and fever, malaria, liver qi stagnation, chest and rib pain, rectal prolapse, uterine prolapse, and irregular menstruation. Bupleurum is widely used clinically and is a commonly used bulk Chinese medicinal herb. It originates in relatively dry mountain slopes, prefers cool climates, and is drought-tolerant.

[0003] Arid regions are typically characterized by strong sunlight, strong winds, low temperatures, and rapid soil moisture evaporation. Although Bupleurum chinense (especially Bupleurum chinense var. chinensis) is cold- and drought-resistant, it is very fragile in its seedling stage, and its survival rate is extremely low when directly exposed to such an environment.

[0004] Foxtail grass, an annual herbaceous plant belonging to the genus Setaria of the Poaceae family, gets its name from its resemblance to a dog's tail. Foxtail grass is cold-hardy, drought-tolerant, and tolerant of poor soil. With a short growing season and strong adaptability, it is an excellent plant for windbreak, sand fixation, and soil and water conservation.

[0005] In existing technologies, there are reports of intercropping Bupleurum with conventional corn or rapeseed. However, the emergence period of Bupleurum coincides with the rainy season. Corn / rapeseed has large roots and leaves, which can significantly interfere with the growth of Bupleurum seedlings. The large leaves can easily cause the Bupleurum seedlings under the leaves to die from wilt disease, commonly known as "covering the seedlings," and the effect is not satisfactory. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention proposes a planting method for intercropping Bupleurum with Setaria viridis in arid regions. This invention not only achieves windbreak and sand fixation in arid regions but also provides convenient conditions for the growth of Bupleurum in arid areas.

[0007] This invention manages and controls the height and density of foxtail grass, turning foxtail grass, which is originally a weed, into a "protector" of Bupleurum chinense, ultimately improving the survival rate and quality of Bupleurum chinense.

[0008] The present invention discloses a method for intercropping Bupleurum chinense with Setaria viridis in arid regions, comprising the following steps: (1) Preliminary preparation: Select land with high terrain and good drainage, deep plow, water, fertilize, level and harrow finely, and make flat beds 1.2-1.5 meters wide; (2) Cultivation of Bupleurum: Sow Bupleurum in early May, using row sowing with a row spacing of 25-30 cm and a furrow depth of 1-2 cm. Cover with soil and press down after sowing. Bupleurum seedlings emerge in mid-June. Thin out seedlings, fix seedlings, and apply top dressing. (3) Planting of foxtail grass: Sow foxtail grass by broadcasting. The sowing row is located between the two rows of Bupleurum chinense, and the row spacing is the same as that of Bupleurum chinense. The furrow depth is 1-2 cm. After sowing, cover with soil and press lightly. After the foxtail grass seedlings emerge, thin them out and cut off the upper stems and leaves. (4) Harvesting of foxtail grass: The seeds of foxtail grass are harvested when it matures in late July or early August; (5) Harvesting Bupleurum: Bupleurum is harvested after 2-3 years of growth.

[0009] In step (1), the depth of deep plowing is 25-30 cm. To prevent soil-borne diseases such as root rot, broad-spectrum fungicides such as carbendazim can be used for soil disinfection.

[0010] In step (2), the seed quantity is 0.5-0.8 kg per mu. Thin the Bupleurum seedlings when they are 5-7 cm tall, and finalize the seedlings when they are 10 cm tall, with a plant spacing of 8-10 cm. Reduce watering after emergence, and drain water in time during the rainy season to prevent root rot.

[0011] In step (2), the specific process of topdressing is as follows: First, apply 10-15 kg of nitrogen, phosphorus and potassium compound fertilizer per mu, and water once in conjunction with topdressing when it is dry; 1-2 months later, apply 10-15 kg of phosphorus and potassium fertilizer per mu, reduce nitrogen fertilizer, and avoid excessive growth of stems and leaves.

[0012] In step (3), foxtail grass and bupleurum are sown simultaneously or 7-10 days after bupleurum sowing, so that bupleurum will germinate first. Foxtail grass is sown by broadcasting, mixing the seeds with fine soil or fine sand and scattering them evenly between the rows of bupleurum, using 0.2-0.3 kg of seeds per mu (approximately 0.067 hectares). The purpose is to sparsely cover the grass, rather than densely planting it to form a grassland. In this invention, foxtail grass is particularly resistant to late spring frosts, and it germinates quickly and uniformly, making it suitable for early sowing, which can be done as early as the beginning of May. When foxtail grass seedlings reach 10 cm in height, they are thinned, leaving a plant spacing of 15-20 cm to avoid excessive density and shading. When the foxtail grass plants grow to 30-40 cm in height, the upper stems and leaves are cut off, leaving 15-16 cm at the base to suppress its apical dominance, allowing it to grow low and continuously shade bupleurum without competing for space.

[0013] Bupleurum was planted in early May, a month earlier than traditional planting. Bupleurum seedlings emerged in mid-June. During the long germination and seedling stages after sowing, foxtail grass provided shade from strong sunlight, conserved soil moisture, and increased air humidity, creating a more temperate growing environment for Bupleurum in its early stages.

[0014] When foxtail grass is harvested in late July or early August, Bupleurum chinense has grown to 3-5 leaves and is 5-8 cm tall, which is exactly the time when it needs to increase photosynthesis. Harvesting the foxtail grass at this time ensures the Bupleurum chinense seedlings receive full sunlight, meeting their growth needs. After harvesting the foxtail grass, promptly remove any remaining plant debris to avoid blocking sunlight for the Bupleurum chinense.

[0015] Around October 1st, Bupleurum stops growing, reaching a height of about 10cm. Its root system is deeper and stronger, which is more conducive to overwintering and rapid growth the following year, allowing for harvesting the following year. The roots are generally dug up after the above-ground parts have withered and turned yellow. After digging, they are washed, sun-dried, or oven-dried.

[0016] The reason why this invention chooses to intercrop foxtail grass with Bupleurum chinense is that: foxtail grass grows quickly and can form a protective layer rapidly; it is also tolerant of poor soil and drought and can grow even in harsh environments; foxtail grass has a moderate plant height, is easy to control by manual cutting, and has a fibrous root system, which is mainly distributed in the shallow layer, thus competing less for resources with the taproot system of Bupleurum chinense.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) Compared with conventional corn or rapeseed, foxtail grass has a smaller plant size and leaves, and a lower shading rate, which can provide moderate shading and help protect the long seedling period of Bupleurum without suffocating the seedlings.

[0018] (2) Foxtail grass germinates and grows quickly, and can quickly form a sparse vegetation cover, providing necessary shade for Bupleurum seedlings that prefer shade and are afraid of sun exposure, avoiding excessive soil surface temperature and seedling burn, and significantly improving the germination rate and survival rate.

[0019] (3) After the foxtail grass grows, its above-ground parts can effectively reduce surface wind speed, reduce wind erosion of soil and seedlings, and reduce water evaporation. Its well-developed underground root system can effectively fix the soil, reduce wind erosion and soil loss, which is especially important in arid areas.

[0020] (4) When Bupleurum needs more sunlight to increase photosynthesis at the end of July, the foxtail grass is also harvested in time. At this time, Bupleurum is in the rapid growth period. However, when intercropped with corn and rapeseed, the corn and rapeseed need a longer growth period, and the shading in the later stage will have an adverse effect on Bupleurum.

[0021] (5) Compared with choosing to lay mulch, foxtail grass seeds are very cheap, almost zero cost, avoid the white pollution of mulch, and are more eco-friendly. Detailed Implementation

[0022] Example 1

[0023] A method for intercropping Bupleurum with Setaria viridis in arid regions includes the following steps: (1) Preliminary preparation: Select land with high terrain and good drainage, deep plow, water, fertilize, level and harrow finely, and make flat beds 1.2-1.5 meters wide; (2) Cultivation of Bupleurum: Sow Bupleurum in early May, using row sowing with a row spacing of 25-30 cm and a furrow depth of 1-2 cm. Cover with soil and press down after sowing. Bupleurum seedlings emerge in mid-June. Thin out seedlings, fix seedlings, and apply top dressing. (3) Planting of foxtail grass: Sow foxtail grass at the same time as sowing Bupleurum. Broadcasting is used. The sowing row is located between the two rows of Bupleurum, and the row spacing is the same as that of Bupleurum. The furrow depth is 1-2 cm. After sowing, cover with soil and press lightly. After the foxtail grass emerges, thin the seedlings and cut off the upper stems and leaves. (4) Harvesting of foxtail grass: The seeds of foxtail grass are harvested when it matures in late July or early August; (5) Harvesting Bupleurum: Bupleurum is harvested after 2-3 years of growth.

[0024] In step (1), the depth of deep plowing is 25-30 cm.

[0025] In step (2), thin the Bupleurum seedlings when they are 5-7 cm tall, and finalize the seedlings when they are 10 cm tall, with a plant spacing of 8-10 cm.

[0026] In step (2), the specific process of topdressing is as follows: First, apply 10-15 kg of nitrogen, phosphorus and potassium compound fertilizer per mu, and water once in conjunction with topdressing when it is dry; 1-2 months later, apply 10-15 kg of phosphorus and potassium fertilizer per mu.

[0027] In step (3), when the foxtail grass seedlings are 10 cm tall, thin them out and keep a plant spacing of 15-20 cm; when the foxtail grass plants grow to 30-40 cm tall, cut off the upper stems and leaves and keep the base 15-16 cm.

Claims

1. A method for intercropping Bupleurum chinense with Setaria viridis in arid regions, characterized in that, Includes the following steps: (1) Preliminary preparation: Select land with high terrain and good drainage, deep plow, water, fertilize, level and harrow finely, and make flat beds 1.2-1.5 meters wide; (2) Cultivation of Bupleurum: Sow Bupleurum in early May, using row sowing with a row spacing of 25-30 cm and a furrow depth of 1-2 cm. Cover with soil and press down after sowing. Bupleurum seedlings emerge in mid-June. Thin out seedlings, fix seedlings, and apply top dressing. (3) Planting of foxtail grass: Sow foxtail grass at the same time as sowing Bupleurum. Broadcasting is used. The sowing row is located between the two rows of Bupleurum, and the row spacing is the same as that of Bupleurum. The furrow depth is 1-2 cm. After sowing, cover with soil and press lightly. After the foxtail grass seedlings emerge, thin them out and cut off the upper stems and leaves. (4) Harvesting of foxtail grass: The seeds of foxtail grass are harvested when it matures in late July or early August; (5) Harvesting Bupleurum: Bupleurum is harvested after 2-3 years of growth.

2. The planting method of intercropping Bupleurum chinense with Setaria viridis in arid areas according to claim 1, characterized in that, In step (1), the depth of deep plowing is 25-30 cm.

3. A planting method for intercropping Bupleurum chinense with Setaria viridis in arid regions according to claim 1, characterized in that, In step (2), thin the Bupleurum seedlings when they are 5-7 cm tall, and finalize the seedlings when they are 10 cm tall, with a plant spacing of 8-10 cm.

4. A planting method for intercropping Bupleurum chinense with Setaria viridis in arid regions according to claim 1, characterized in that, In step (2), the specific process of topdressing is as follows: First, apply 10-15 kg of nitrogen, phosphorus and potassium compound fertilizer per mu, and water once in conjunction with topdressing when it is dry; 1-2 months later, apply 10-15 kg of phosphorus and potassium fertilizer per mu.

5. A planting method for intercropping Bupleurum chinense with Setaria viridis in arid regions according to claim 1, characterized in that, In step (3), when the foxtail grass seedlings are 10 cm tall, thin them out and keep a plant spacing of 15-20 cm; when the foxtail grass plants grow to 30-40 cm tall, cut off the upper stems and leaves and keep the base 15-16 cm.