Method for planting Chinese herbaceous peony under moso bamboo forest

Abstract

The invention relates to the technical field of paeonia lactiflora planting. The invention provides a method for planting Chinese herbaceous peony under a moso bamboo forest, which comprises the following steps: (1) dividing a planting plot into a strip-shaped planting area and a spacing area, cutting all moso bamboos in the planting area, cleaning bamboo stumps, and finishing to be horizontal; (2) the moso bamboos in the spacing areas are partially cut down; (3) planting Chinese herbaceous peony seedlings in the planting area, and performing fertilization management after planting; and (4) harvesting fresh peony roots. The ecological environment under the moso bamboo forest is used for providing proper temperature and humidity conditions for the growth of the Chinese herbaceous peony, and the canopy density and the light transmittance under the forest reach the range suitable for the growth of the Chinese herbaceous peony by controlling the standing bamboo degree of the moso bamboo. By setting a reasonable planting bag specification, planting depth and a fertilization method, competition of phyllostachys edulis rhizome and root on the growth of Chinese herbaceous peony is avoided, an annular fertilization method is applied to induce the root system to find nutrients and promote root system expansion, fertilizers with different growth promoting effects are accurately and efficiently applied in different periods, and rhizome growth and medicinal component accumulation are promoted.

Description

Technical Field

[0001] The invention relates to the technical field of peony planting, and in particular to a method for planting peony under a bamboo forest. Background Art

[0002] Moso bamboo (Phyllostachys edulis) belongs to the genus Phyllostachys of the Poaceae family. It is a monoaxial, scattered, evergreen, arbor-like bamboo plant with a wide distribution area and high yield, and has important economic value. However, in recent years, the price of bamboo products has continued to decline, labor costs have continued to rise, and the economic benefits of bamboo forests have continued to decline, which has seriously affected the management enthusiasm of bamboo farmers, and bamboo forests have been abandoned and mismanaged. Effectively utilizing the space under the bamboo forest and developing the moso bamboo forest economy has become an important means to solve the bottleneck problem of bamboo industry development and promote the high-quality and sustainable development of the bamboo industry. At present, the forest economy has formed a variety of formats such as forest medicine, forest fungi, and forest poultry, but there are still problems such as low technical level, low level of intensiveness, and single function. The single replication of the existing bamboo forest compound management model will cause an oversupply of products, reduce economic benefits, and dampen the production enthusiasm of bamboo farmers. Therefore, it is urgent to explore a new bamboo forest compound management model and develop high-yield and efficient cultivation technology based on the interaction mechanism between moso bamboo and forest crops.

[0003] Peony (Paeonia lactiflora Pall.) is a perennial herbaceous plant belonging to the genus Paeonia in the family Ranunculaceae. Its root can be used as medicine and is called white peony. It has analgesic and menstrual regulating effects and is a major medicinal material. Its flowers are large and colorful, with good ornamental value, and have important economic and landscape value. Peony likes light and can tolerate semi-shade, likes fertilizer and tolerates drought. It has low requirements for soil conditions and grows well in loose sandy loam. It can be planted on a large scale under the forest. However, there is currently no technical method for planting peonies under bamboo forests. The underground whip roots of bamboo and the shading on the ground inhibit the growth of the aboveground parts and root system of peonies, making the yield of planting under the forest lower than that of planting in the field.

[0004] Therefore, there is an urgent need to develop technology for planting peonies under bamboo forests based on the shade tolerance, fertilizer requirement and root growth characteristics of bamboo and peony to increase peony root yield. Summary of the invention

[0005] The purpose of the present invention is to provide a method for planting peony under a bamboo forest, which can significantly increase the fresh root yield of peony.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The present invention provides a method for planting peonies under a bamboo forest, comprising the following steps:

[0008] (1) Divide the planting plot into strip-shaped planting areas and interval areas, cut down all the bamboos in the planting area, clean up the bamboo stumps, and level the planting area;

[0009] (2) Partially fell the bamboo in the interval area;

[0010] (3) Planting peony seedlings in the planting area and carrying out fertilization management after planting;

[0011] (4) Harvest fresh peony roots.

[0012] Preferably, the widths of the planting area and the spacing area in step (1) are independently 38 to 42 cm, and the felling in step (1) is carried out from November to December.

[0013] Preferably, the partial felling in step (2) is carried out from November to December, and the method of the partial felling is as follows: removing all bamboos of degree 4 and above and part of bamboos of degree 3; after the partial felling, the standing bamboo density of the bamboo forest is 75 to 85 plants per mu, and after the partial felling, the ratio of the number of bamboos of degree 1, degree 2 and degree 3 in the interval area is 2:2:1 to 2, and the forest understory density is 0.32 to 0.42.

[0014] Preferably, the method for obtaining the peony seedlings in step (3) is: selecting 4-year-old peony rhizomes for division, retaining 2 to 3 buds and fibrous roots per plant, and the rhizome length is 12 cm to 15 cm.

[0015] Preferably, the planting method in step (3) is:

[0016] A. Mix the soil and decomposed fertilizer and fill them into the peony planting bag;

[0017] B. Place the peony planting bags in the planting area with a standard spacing of 38 to 42 cm;

[0018] C. Dig a hole 13 to 17 cm deep in the peony planting bag and place the buds of the peony seedlings vertically upward in the hole;

[0019] D. Backfill the soil and cover the peony seedlings with 1 to 3 cm of soil.

[0020] Preferably, the peony planting bag in step A is a non-woven bag with an inner diameter of 38 to 42 cm and a height of 40 to 50 cm.

[0021] Preferably, the soil in step A is soil in the soil layer within 30 cm under the bamboo forest, the decomposed fertilizer is decomposed sheep manure or cow manure, and the mass ratio of the soil to the decomposed fertilizer is 110-130:1.

[0022] Preferably, the planting density of the peony seedlings in step (3) is 1890 to 2300 plants per mu, and the planting time is from early November to late November.

[0023] Preferably, the fertilization method in step (3) is as follows: from March to May each year, 1.2 to 1.3 g of urea is applied to each peony planting bag every month; from June to September, 4.5 to 5.5 g of superphosphate is applied to each peony planting bag every month; from October to February of the following year, 1.5 to 2.5 g of compound fertilizer is applied to each peony planting bag every month, and the mass ratio of N, P2O5 and K2O in the compound fertilizer is 3 to 4:1 to 2:3 to 4;

[0024] When applying fertilizer in step (3), the fertilizer is evenly spread around the seedlings at a distance of 8 to 12 cm from the seedlings, and the soil is turned 4 to 6 cm after fertilization.

[0025] Preferably, the harvesting time in step (4) is September to October of the 3rd to 4th year after the peony seedlings are planted.

[0026] The present invention provides a method for planting peony under a bamboo forest, comprising the following steps: (1) dividing a planting plot into a strip-shaped planting area and an interval area, cutting down all the bamboo in the planting area, cleaning up the bamboo stumps, and arranging the planting area to a horizontal level; (2) partially cutting down the bamboo in the interval area; (3) planting peony seedlings in the planting area, and performing fertilization management after planting; (4) harvesting fresh peony roots. The present invention utilizes the special ecological environment under the bamboo forest to provide suitable temperature and humidity conditions for the growth of peony, and creates a forest canopy density and light transmittance range suitable for the growth of peony by regulating the bamboo standing degree and age ratio. Under this condition, the chlorophyll content of peony leaves and the nutrient element content related to photosynthesis are significantly improved, which can effectively promote the assimilation of photosynthetic products and the accumulation of photosynthetic products in rhizomes, and finally increase the rhizome yield of peony. This method uses the root growth and fertilizer-driving characteristics of peony to set reasonable planting bag specifications, planting depth and fertilization methods, avoiding the competition of bamboo whip roots on peony growth, providing appropriate and sufficient soil space for peony root growth, and inducing the root system to forage for nutrients through the circular fertilization method, effectively promoting root expansion. According to the growth strategy and fertilizer requirements of peony at different growth stages, fertilizers with different growth-promoting effects are accurately and efficiently applied at different times to promote rhizome growth and accumulation of medicinal ingredients. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the planting area and the planting area. DETAILED DESCRIPTION

[0028] The present invention provides a method for planting peonies under a bamboo forest, comprising the following steps:

[0029] (1) Divide the planting plot into strip-shaped planting areas and interval areas, cut down all the bamboos in the planting area, clean up the bamboo stumps, and level the planting area;

[0030] (2) Partially fell the bamboo in the interval area;

[0031] (3) Planting peony seedlings in the planting area and carrying out fertilization management after planting;

[0032] (4) Harvest fresh peony roots.

[0033] In the present invention, the widths of the planting area and the spacing area in step (1) are preferably independently 38 to 42 cm, and more preferably 40 cm. The felling time in step (1) is preferably from November to December.

[0034] In the present invention, the time for partial felling in step (2) is preferably from November to December, and the method for partial felling is preferably: removing all bamboos of degree 4 and above and part of bamboos of degree 3; the density of standing bamboos in the interval area after partial felling is preferably 75-85 plants / mu, more preferably 80 plants / mu, the ratio of the number of bamboos of degree 1, degree 2 and degree 3 in the interval area after partial felling is 2:2:1-2, more preferably 2:2:1, and the forest understory density is preferably 0.32-0.42, more preferably 0.37.

[0035] In the present invention, the method for obtaining the peony seedlings in step (3) is preferably: selecting 4-year-old peony rhizomes for division, retaining 2 to 3 buds and fibrous roots per plant, and the rhizome length is 12 cm to 15 cm. It is further preferably: selecting 4-year-old peony rhizomes for division, retaining 3 buds and fibrous roots per plant, and the rhizome length is 13 to 14 cm.

[0036] In the present invention, the planting method in step (3) is:

[0037] A. Mix the soil and decomposed fertilizer and fill them into the peony planting bag;

[0038] B. Place the peony planting bags in the planting area with a standard spacing of 38 to 42 cm;

[0039] C. Dig a hole 13 to 17 cm deep in the peony planting bag and place the buds of the peony seedlings vertically upward in the hole;

[0040] D. Backfill the soil and cover the peony seedlings with 1 to 3 cm of soil

[0041] In the present invention, the peony planting bag in step A is preferably a non-woven bag with an inner diameter of 38 to 42 cm and a height of 40 to 50 cm, and more preferably a non-woven bag with an inner diameter of 40 cm and a height of 45 cm.

[0042] In the present invention, the soil in step A is preferably soil in the soil layer within 30 cm under the bamboo forest, the decomposed fertilizer is preferably decomposed sheep manure or cow manure, and the mass ratio of the soil to the decomposed fertilizer is preferably 110-130:1, and more preferably 120:1.

[0043] In the present invention, the plant spacing in step B is preferably 40 cm, and the thickness of the covering soil in step D is preferably 2 cm.

[0044] In the present invention, the planting density of the peony seedlings in step (3) is preferably 1890 to 2300 plants / mu, more preferably 2080 plants / mu, and the planting time is preferably early November to late November, more preferably mid-November.

[0045] In the present invention, the fertilization method in step (3) is preferably: from March to May each year, 1.2 to 1.3 g of urea is applied to each peony planting bag every month; from June to September, 4.5 to 5.5 g of superphosphate is applied to each peony planting bag every month; from October to February of the following year, 1.5 to 2.5 g of compound fertilizer is applied to each peony planting bag every month, and further preferably: from March to May each year, 1.25 g of urea is applied to each peony planting bag every month; from June to September, 5 g of superphosphate is applied to each peony planting bag every month; from October to February of the following year, 2 g of compound fertilizer is applied to each peony planting bag every month, and the mass ratio of N, P2O5 and K2O in the compound fertilizer is preferably 3 to 4:1 to 2:3 to 4;

[0046] When applying fertilizer in step (3), it is preferred that the fertilizer be evenly spread around the seedlings at a distance of 8 to 12 cm from the seedlings, and the soil be turned 4 to 6 cm after fertilizer application. It is further preferred that the fertilizer be evenly spread around the seedlings at a distance of 10 cm from the seedlings, and the soil be turned 5 cm after fertilizer application.

[0047] In the present invention, the time of harvesting in step (4) is preferably September to October of the 3rd to 4th year after the peony seedlings are planted.

[0048] The technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0049] Example 1

[0050] A method for planting peony under a bamboo forest, comprising the following steps:

[0051] (1) A bamboo forest of 1 mu was selected in Moganshan Town, Deqing County, Zhejiang Province, with a sunny slope of 20°. The bamboo forest was arranged in a stepped manner into strips with alternating planting areas and spacing areas, and the width of the planting area and the spacing area was 40 cm.

[0052] (2) All bamboos in the planting area will be felled, bamboo stumps will be cleared, and the planting area will be leveled; some bamboos in the spacing area will be felled; the felling time is from November to December, and all bamboos of 4 degrees and above and some bamboos of 3 degrees will be removed during the felling process; the standing bamboo density is 80 plants / mu, the ratio of 1 degree, 2 degree, and 3 degree bamboos is 2:2:1, and the forest understory density is 0.37.

[0053] (3) Place peony planting bags in the planting area with a spacing of 40 cm. The peony planting bag is a non-woven bag with an inner diameter of 40 cm and a height of 45 cm. Mix soil and decomposed fertilizer and fill them into the peony planting bag; the soil is the soil layer within 30 cm under the bamboo forest, and the fertilizer is decomposed sheep manure. The mass ratio of the soil to the fertilizer is 120:1.

[0054] (4) Select 4-year-old peony rhizomes for division, retain 3 buds and fibrous roots per plant, and the rhizome length is 13 cm. Peony seedlings were planted in peony planting bags in mid-November, with one seedling per planting bag. A 15 cm deep hole was dug in the peony planting bag, and the buds of the peony seedlings were placed vertically in the hole. The seedlings were covered with 2 cm of soil. The planting density of peony seedlings was 2080 plants / mu.

[0055] (5) From March to May of each year, 1.25 g of urea was applied to each peony planting bag every month; from June to September, 5 g of superphosphate was applied to each peony planting bag every month; from October to February of the following year, 2 g of compound fertilizer was applied to each peony planting bag every month, and the mass ratio of N, P2O5 and K2O in the compound fertilizer was 7:3:7. Each time fertilizer was applied, the fertilizer was evenly spread around the seedling at a distance of 10 cm from the seedling, and the soil was turned 5 cm after fertilization.

[0056] (4) Peony root fresh harvest in October, fresh root yield is 1972.7 kg / mu.

[0057] Example 2

[0058] A method for planting peony under a bamboo forest, comprising the following steps:

[0059] (1) A bamboo forest of 1 mu was selected in Moganshan Town, Deqing County, Zhejiang Province, with a sunny slope of 20°. The bamboo forest was arranged in a stepped manner into strips with alternating planting areas and spacing areas, and the width of the planting area and the spacing area was 38 cm.

[0060] (2) All bamboos in the planting area will be felled, bamboo stumps will be cleared, and the planting area will be leveled; some bamboos in the spacing area will be felled; the felling time is from November to December, and all bamboos of 4 degrees and above and some bamboos of 3 degrees will be removed during the felling process; the standing bamboo density is 75 plants / mu, the ratio of 1 degree, 2 degree, and 3 degree bamboos is 2:2:1, and the forest understory density is 0.32.

[0061] (3) Place peony planting bags in the planting area with a spacing of 38 cm. The peony planting bag is a non-woven bag with an inner diameter of 38 cm and a height of 40 cm. Mix soil and decomposed fertilizer and fill them into the peony planting bag; the soil is the soil layer within 30 cm under the bamboo forest, and the fertilizer is decomposed sheep manure. The mass ratio of the soil to the fertilizer is 120:1.

[0062] (4) Select 4-year-old peony rhizomes for division, retain 3 buds and fibrous roots for each plant, and the rhizome length is 13 cm. Peony seedlings are planted in peony planting bags in mid-November, with one seedling per planting bag. A 15 cm deep hole is dug in the peony planting bag, and the buds of the peony seedlings are placed vertically in the hole. The seedlings are covered with 2 cm of soil. The planting density of peony seedlings is 2300 plants / mu.

[0063] (5) From March to May of each year, 1.25 g of urea was applied to each peony planting bag every month; from June to September, 5 g of superphosphate was applied to each peony planting bag every month; from October to February of the following year, 2 g of compound fertilizer was applied to each peony planting bag every month, and the mass ratio of N, P2O5 and K2O in the compound fertilizer was 7:3:7. Each time fertilizer was applied, the fertilizer was evenly spread around the seedling at a distance of 8 cm from the seedling, and the soil was turned 5 cm after fertilization.

[0064] (6) Peony root fresh harvest in October, fresh root yield is 1851.5 kg / mu.

[0065] Example 3

[0066] A method for planting peony under a bamboo forest, comprising the following steps:

[0067] (1) A bamboo forest of 1 mu was selected in Moganshan Town, Deqing County, Zhejiang Province, with a sunny slope of 20°. The bamboo forest was arranged in a stepped manner into strips with alternating planting areas and spacing areas, and the width of the planting area and the spacing area was 40 cm.

[0068] (2) All bamboos in the planting area will be felled, bamboo stumps will be cleared, and the planting area will be leveled; some bamboos in the spacing area will be felled; the felling time is from November to December, and all bamboos of degree 3 and above and some bamboos of degree 2 will be removed during the felling process; the standing bamboo density is 85 bamboos / mu, the ratio of bamboos of degree 1, degree 2, and degree 3 is 2:2:1, and the forest understory density is 0.42.

[0069] (3) Place peony planting bags in the planting area with a spacing of 40 cm. The peony planting bag is a non-woven bag with an inner diameter of 40 cm and a height of 45 cm. Mix soil and decomposed fertilizer and fill them into the peony planting bag; the soil is the soil layer within 30 cm under the bamboo forest, and the fertilizer is decomposed sheep manure. The mass ratio of the soil to the fertilizer is 120:1.

[0070] (4) Four-year-old peony rhizomes were selected for division, and three buds and fibrous roots were retained for each plant. The rhizome length was 13 cm. Peony seedlings were planted in peony planting bags in mid-November, with one seedling per planting bag. A 15 cm deep hole was dug in the peony planting bag, and the buds of the peony seedlings were placed vertically upward in the hole. The seedlings were covered with 2 cm of soil. The planting density of peony seedlings was 2080 plants / mu.

[0071] (5) From March to May of each year, 1.2 g of urea was applied to each peony planting bag every month; from June to September, 5.5 g of superphosphate was applied to each peony planting bag every month; from October to February of the following year, 1.5 g of compound fertilizer was applied to each peony planting bag every month, and the mass ratio of N, P2O5 and K2O in the compound fertilizer was 7:3:7. Each time fertilizer was applied, the fertilizer was evenly spread around the seedling at a distance of 10 cm from the seedling, and the soil was turned 5 cm after fertilization.

[0072] (4) Peony root fresh harvest in October, fresh root yield is 1872.6 kg / mu.

[0073] Example 4

[0074] A method for planting peony under a bamboo forest, comprising the following steps:

[0075] (6) A bamboo forest of 1 mu was selected in Moganshan Town, Deqing County, Zhejiang Province. The slope of the sunny slope was 20°. The bamboo forest was arranged in a stepped manner into strips with alternating planting areas and spacing areas. The width of the planting area and the spacing area was 42 cm.

[0076] (7) All bamboos in the planting area shall be felled, bamboo stumps shall be cleared, and the planting area shall be leveled; some bamboos in the spacing area shall be felled; the felling time shall be from November to December, and all bamboos of degree 3 and above and some bamboos of degree 2 shall be removed during felling; the standing bamboo density shall be 81 bamboos / mu, the ratio of bamboos of degree 1, degree 2 and degree 3 shall be 1:1:1, and the forest understory canopy density shall be 0.37.

[0077] (8) Place peony planting bags in the planting area with a spacing of 42 cm. The peony planting bag is a non-woven bag with an inner diameter of 42 cm and a height of 50 cm. Mix soil and decomposed fertilizer and fill them into the peony planting bag; the soil is the soil layer within 30 cm under the bamboo forest, and the fertilizer is decomposed sheep manure. The mass ratio of the soil to the fertilizer is 120:1.

[0078] (9) Four-year-old peony rhizomes were selected for division, and three buds and fibrous roots were retained for each plant. The rhizome length was 14 cm. Peony seedlings were planted in peony planting bags in mid-November, with one seedling per planting bag. A 17 cm deep hole was dug in the peony planting bag, and the buds of the peony seedlings were placed vertically upward in the hole. The seedlings were covered with 2 cm of soil. The planting density of peony seedlings was 1890 plants / mu.

[0079] (10) From March to May of each year, 1.25 g of urea was applied to each peony planting bag every month; from June to September, 5.5 g of superphosphate was applied to each peony planting bag every month; from October to February of the following year, 2 g of compound fertilizer was applied to each peony planting bag every month, and the mass ratio of N, P2O5 and K2O in the compound fertilizer was 7:3:7. Each time fertilizer was applied, the fertilizer was evenly spread around the seedling at a distance of 12 cm from the seedling, and the soil was turned 5 cm after fertilization.

[0080] (4) Peony root fresh harvest in October, fresh root yield is 1776.9 kg / mu.

[0081] Comparative Example 1

[0082] (1) A bamboo forest of 1 mu was selected in Moganshan Town, Deqing County, Zhejiang Province. The slope of the sunny slope was 20°. No step-by-step land preparation was performed on the bamboo forest, and only 15 cm of tillage was performed.

[0083] (2) In November, some 4th degree bamboos were felled; the standing bamboo density was 220 plants / mu, and the forest canopy density was 0.72.

[0084] (3) Four-year-old peony rhizomes were selected for division, with two buds and fibrous roots retained for each plant, and the rhizome length was 13 cm. Peony seedlings were directly planted in the soil under the bamboo forest in mid-November. A 15 cm deep hole was dug, and the buds of the peony seedlings were placed vertically upward in the hole. The seedlings were covered with 5 cm of soil. The peony seedlings were planted with a spacing of 20 cm and a row spacing of 80 cm. The planting density was 4160 plants / mu. Before planting, 1000 kg of decomposed sheep manure was spread on the soil surface.

[0085] (4) In April, August and December each year, 20 kg of compound fertilizer was spread, and the mass ratio of N, P2O5 and K2O in the compound fertilizer was 15:15:15.

[0086] (4) In October, fresh peony roots were harvested, with a fresh root yield of 936 kg / mu.

[0087] As can be seen from the above embodiments, the present invention provides a method for planting peony under a bamboo forest, comprising the following steps: (1) dividing the planting plot into a strip-shaped planting area and an interval area, cutting down all the bamboo in the planting area, cleaning the bamboo stumps, and arranging the planting area to a horizontal level; (2) partially cutting down the bamboo in the interval area; (3) planting peony seedlings in the planting area, and performing fertilization management after planting; (4) harvesting fresh peony roots. The present invention utilizes the special ecological environment under the bamboo forest to provide suitable temperature and humidity conditions for the growth of peony, and creates a forest canopy density and light transmittance range suitable for the growth of peony by regulating the bamboo standing degree and age ratio. Under this condition, the chlorophyll content of peony leaves and the nutrient element content related to photosynthesis are significantly improved, which can effectively promote the assimilation of photosynthetic products and the accumulation of photosynthetic products in rhizomes, and finally increase the rhizome yield of peony. This method sets reasonable planting bag specifications, planting depth and fertilization methods according to the root growth and fertilizer-driving characteristics of peony, avoids the competition of bamboo whip roots on peony growth, provides appropriate and sufficient soil space for peony root growth, and induces the root system to forage for nutrients through the circular fertilization method, effectively promoting root expansion. According to the growth strategy of peony at different growth stages and the demand characteristics for nutrient elements, fertilizers with different growth-promoting effects are accurately and efficiently applied at different times to promote rhizome growth and accumulation of medicinal ingredients. The application of the above method can greatly increase the fresh root yield of peony.

[0088] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for planting peony under a bamboo forest, characterized in that: The steps include: (1) Divide the planting plot into strip-shaped planting areas and interval areas, cut down all the bamboos in the planting area, clean up the bamboo stumps, and level the planting area; (2) Partial felling of bamboos in the interval area; (3) Planting peony seedlings in the planting area and carrying out fertilization management after planting; (4) Harvest fresh peony roots.

2. The method according to claim 1, characterized in that The widths of the planting area and the spacing area in step (1) are independently 38 to 42 cm, and the felling time in step (1) is from November to December.

3. The method according to claim 2, characterized in that The time for the partial felling in step (2) is from November to December, and the method for the partial felling is: removing all the bamboos of degree 4 and above and part of the bamboos of degree 3; after the partial felling, the standing bamboo density of the bamboo forest is 75 to 85 plants / mu, the number ratio of bamboos of degree 1, degree 2 and degree 3 in the interval area after the partial felling is 2:2:1 to 2, and the forest understory density is 0.32 to 0.

42.

4. The method according to claim 3, characterized in that: The method for obtaining the peony seedlings described in step (3) is: select 4-year-old peony rhizomes for division, retain 2 to 3 buds and fibrous roots for each plant, and the rhizome length is 12 cm to 15 cm.

5. The method according to claim 4, characterized in that The method of planting in step (3) is: A. Mix the soil and decomposed fertilizer and fill them into the peony planting bag; B. Place the peony planting bags in the planting area according to the standard spacing of 38 to 42 cm; C. Dig a hole 13 to 17 cm deep in the peony planting bag and place the buds of the peony seedlings vertically upward in the hole; D. Backfill the soil and cover the peony seedlings with 1 to 3 cm of soil.

6. The method according to claim 5, characterized in that The peony planting bag described in step A is a non-woven bag with an inner diameter of 38 to 42 cm and a height of 40 to 50 cm.

7. The method according to claim 6, characterized in that The soil in step A is soil in the soil layer within 30 cm under the bamboo forest, the decomposed fertilizer is decomposed sheep dung or cow dung, and the mass ratio of the soil to the decomposed fertilizer is 110-130:

1.

8. The method according to claim 4, characterized in that The planting density of the peony seedlings in step (3) is 1890 to 2300 plants per mu, and the planting time is from early November to late November.

9. The method according to claim 8, characterized in that The fertilization method in step (3) is as follows: from March to May of each year, 1.2 to 1.3 g of urea is applied to each peony planting bag every month; from June to September, 4.5 to 5.5 g of superphosphate is applied to each peony planting bag every month; from October to February of the following year, 1.5 to 2.5 g of compound fertilizer is applied to each peony planting bag every month, and the mass ratio of N, P2O5 and K2O in the compound fertilizer is 3 to 4:1 to 2:3 to 4; When applying fertilizer in step (3), the fertilizer is evenly spread around the seedlings at a distance of 8 to 12 cm from the seedlings, and the soil is turned 4 to 6 cm after fertilization.

10. The method according to any one of claims 1 to 9, characterized in that: The harvesting time in step (4) is September to October of the 3rd to 4th year after the peony seedlings are planted.

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