Moso bamboo stump removing method

Abstract

The invention provides a moso bamboo stump removing method which specifically comprises the following steps that firstly, a plurality of holes are drilled in the surface of a bamboo wall in the vertical direction, and then pretreatment liquid is sprayed to the surface of a bamboo stump; 2, filling the drill holes with compound bacteria liquid, and then spraying a nutrient solution; after 20-25 days, the drill holes are filled with a decay accelerating agent till the bamboo stumps are decayed; 3, after the bamboo stumps are rotted, the bamboo stumps are returned to the field in situ, and a modifier is applied to soil around the bamboo stumps; compared with the prior art, the method can significantly reduce the decay period of the bamboo stump, significantly improve the degradation rate of bamboo fibers and the content of organic matters in soil, and give consideration to ecological safety and economic benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of moso bamboo cultivation, and particularly relates to a method for removing moso bamboo stumps. Background Art

[0002] Moso bamboo grows from bamboo shoots sprouted from underground bamboo rhizomes. After the bamboo is cut down, the remaining bamboo stumps are left. The shape of the bamboo stumps is conical, wider at the top and narrower at the bottom, and sharply shrinks into a tail cone shape at the bottom. The bamboo stumps are connected to the bamboo rhizomes at the tail cone part. The bamboo rhizomes extend horizontally and vertically in the soil, and there are many rhizoid roots on the bamboo rhizomes. There are also many bamboo roots (i.e., stump roots) attached to the outer circle of the bamboo stumps. New bamboo grows from bamboo shoots naturally sprouted from the bamboo rhizomes. After the moso bamboo is cut down, the remaining bamboo stumps must be removed. Otherwise, the dot matrix distribution of the bamboo stumps occupies the underground space, reducing the underground growth space of the bamboo rhizomes and the above-ground growth space of new bamboo, and reducing the quantity and quality of bamboo shoots sprouted from the bamboo rhizomes. The tail cone part of the bamboo stumps connected to the bamboo rhizomes absorbs water and oxygen in the bamboo rhizomes and soil and supplies them to the bamboo stumps. The bamboo roots attached to the bamboo stump body also absorb water and oxygen. Under such conditions, it takes 10 years or more for the bamboo stumps to rot. Moreover, the bamboo stumps contain a high content of bamboo fibers and are not easy to rot, occupying a large amount of bamboo forest soil space, reducing the effective utilization space of the bamboo forest, and seriously affecting the extension of the bamboo rhizomes underground, significantly reducing the regeneration efficiency and economic value of the bamboo forest. The existing methods for removing bamboo stumps are generally physical excavation or chemical treatment, but there are still the following defects: 1. Low efficiency, too long natural decay period, high cost of manual excavation, damage to the soil structure, and high labor intensity. The effect of a single chemical rot inducer (such as strong acid or strong alkali) is limited, it is easy to pollute the soil, and it is difficult to completely decompose bamboo fibers. 2. Risk of ecological damage, physical excavation is easy to damage the bamboo rhizome network, affecting the regeneration and growth of the bamboo forest, and chemical treatment may lead to soil acidification, microbial imbalance, etc. 3. Lack of systematicness, the existing methods mostly focus on the removal of bamboo stumps itself, ignoring subsequent soil restoration and nutrient supplementation, resulting in a long land rejuvenation period.

[0003] Therefore, providing a simple, efficient, green and environmentally friendly method for removing moso bamboo stumps has become an urgent problem to be solved. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a method for removing moso bamboo stumps, which specifically includes the following steps:

[0005] A method for removing moso bamboo stumps, characterized by including the following steps:

[0006] Step 1, drill a number of holes on the surface of the bamboo wall along the vertical direction, and then spray a pretreatment solution on the surface of the bamboo stump;

[0007] Step 2, fill the drilled holes with a compound bacterial solution, and spray a nutrient solution once every 5 - 7 days; after 20 - 25 days, fill the drilled holes with a rot inducer, and fill it once every 8 - 12 days until the bamboo stump rots.

[0008] Step 3: After the bamboo stumps rot, return the bamboo stumps to the field in situ and apply a modifier to the soil around the bamboo stumps.

[0009] Preferably, in Step 1, the drilling diameter is 5 - 8 mm and the depth is 10 - 15 cm.

[0010] Preferably, the dosage of the pretreatment liquid in Step 1 is 200 - 300 mL / stump.

[0011] Preferably, the pretreatment liquid in Step 1 includes urea, sucrose and water, and the mass ratio is 1:2:200.

[0012] Preferably, the dosage of the composite bacterial liquid in Step 2 is 5 - 10 g / hole, the dosage of the nutrient solution is 50 - 100 mL / stump, and the dosage of the decay accelerator is 10 - 20 g / hole.

[0013] Preferably, the composite bacterial liquid in Step 2 includes composite bacterial powder and culture medium, and the mass ratio is 1:100. The nutrient solution is a glucose solution with a mass fraction of 0.1 - 0.2%. The decay accelerator includes carbamide peroxide, ammonium ferric citrate, sodium dodecyl benzene sulfonate, nano-titanium dioxide and water, and the mass ratio is 15:8:2:1:75.

[0014] Preferably, the composite bacterial powder includes freeze-dried powder of white rot fungi and bacillus subtilis powder, and the mass ratio is 4:1. The culture medium is bamboo powder, wheat bran, ammonium sulfate, potassium dihydrogen phosphate, magnesium sulfate heptahydrate, glucose and water, and the mass ratio is 15:10:0.2:0.1:0.05:0.3:100.

[0015] Preferably, the application amount of the modifier in Step 3 is 2 - 3 kg / m 2 , and the application range is 1 - 2 m 2 ~~.

[0016] Preferably, the modifier in Step 3 is activated carbon, humic acid, vermiculite and bentonite, and the mass ratio is 10:1:3:5.

[0017] Preferably, when applying the modifier in Step 3, EM bacterial agent with a mass fraction of 0.2% is additionally applied, and the application amount is 20 - 30 g / m 2 .

[0018] The present invention has the following advantages:

[0019] (1) High nitrogen source (urea) and carbon source (sucrose) activate microbial activity and accelerate the degradation of bamboo fibers. White rot fungi can secrete cellulase to decompose bamboo fibers, and Bacillus subtilis inhibits miscellaneous bacteria and promotes humification. Urea peroxide releases reactive oxygen species to destroy the lignin structure, and titanium dioxide nanoparticles assist in photocatalytic degradation. Through the synergistic action of multi-stage biochemistry, the present invention significantly shortens the decay cycle.

[0020] (2) After the bamboo stumps decay, they are directly returned to the field in situ and transformed into organic matter. The modifier (activated carbon + humic acid) adsorbs harmful substances and improves the water and fertilizer retention capacity of the soil. The supplementary application of EM bacterial agents further balances the soil microbial community, avoids the ecological risks caused by the dominance of single strains, reduces chemical pollution, and improves the sustainable productivity of the soil.

[0021] (3) The honeycomb-shaped drilling increases the penetration area of the bacterial liquid and the decay accelerator, ensuring uniform degradation inside the bamboo stumps. Regular spraying of low-concentration glucose maintains microbial activity, avoids the imbalance of the microbial community caused by overnutrition, reduces resource waste through quantitative filling, reduces costs, scientifically optimizes the process parameters, standardizes the operation, and is applicable to large-scale bamboo forest management.

[0022] (4) The bamboo stumps are returned to the field in situ and transformed into organic fertilizers, supplementing the soil carbon pool. Using bamboo processing waste (bamboo powder) as the culture medium for the bacterial liquid realizes the resource utilization of waste, reduces the input of external resources, and conforms to the concept of circular agriculture. Specific embodiments

[0023] The technical solutions in the embodiments of the invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Example 1

[0025] Step 1, drill a number of holes on the surface of the bamboo wall in the vertical direction. The diameter of the holes is 8 mm, the depth is 12 cm, and then spray the pretreatment liquid on the surface of the bamboo stump, with a dosage of 250 mL / stump. The pretreatment liquid includes urea, sucrose and water, and the mass ratio is 1:2:200.

[0026] Step 2: Fill 10 g / hole of the composite bacterial liquid into the drilled holes, and spray the nutrient solution at a rate of 80 mL / stool every 5 days; after 20 days, fill 15 g / hole of the decay accelerator into the drilled holes, and fill it every 10 days until the bamboo stools rot; the composite bacterial liquid includes composite bacterial powder and culture medium, with a mass ratio of 1:100, the nutrient solution is a 0.1% glucose solution by mass fraction, the decay accelerator includes carbamide peroxide, ammonium ferric citrate, sodium dodecylbenzenesulfonate, nano-titanium dioxide and water, with a mass ratio of 15:8:2:1:75; the composite bacterial powder includes freeze-dried white rot fungus powder and Bacillus subtilis powder, with a mass ratio of 4:1, and the culture medium is bamboo powder, wheat bran, ammonium sulfate, potassium dihydrogen phosphate, magnesium sulfate heptahydrate, glucose and water, with a mass ratio of 15:10:0.2:0.1:0.05:0.3:100.

[0027] Step 3: After the bamboo stools rot, return the bamboo stools to the field in situ, and apply the modifier and EM bacterial agent to the soil around the bamboo stools. The application rate of the modifier is 2.5 kg / m 2 , and the application range is 2 m 2 , the mass fraction of the EM bacterial agent is 0.2%, and the application rate is 25 g / m 2 . The modifier is activated carbon, humic acid, vermiculite and bentonite, with a mass ratio of 10:1:3:5.

[0028] Comparative Example 1

[0029] The traditional physical method is used to remove the bamboo stools, specifically referring to the first two steps of "A Method for Removing Bamboo Stools in a Jute Bamboo Garden", namely Step (1) and Step (2). The application number of "A Method for Removing Bamboo Stools in a Jute Bamboo Garden" is 201610889836.0, and the publication number is CN 106416929 A.

[0030] Comparative Example 2

[0031] The traditional chemical method is used to remove the bamboo stools, specifically referring to the last two steps of "A Method for Removing Bamboo Stools in a Jute Bamboo Garden", namely Step (2) and Step (3). The application number of "A Method for Removing Bamboo Stools in a Jute Bamboo Garden" is 201610889836.0, and the publication number is CN 106416929 A.

[0032] Comparative Example 3

[0033] Completely remove the moso bamboo stools according to the method of "A Method for Removing Bamboo Stools in a Jute Bamboo Garden". The application number of "A Method for Removing Bamboo Stools in a Jute Bamboo Garden" is 201610889836.0, and the publication number is CN 106416929A.

[0034] Test Example 1

[0035] A local moso bamboo forest was selected, and the bamboo stumps of moso bamboo were removed using Example 1 and Comparative Examples 1-3 respectively. 50 bamboo stumps were removed in each group, and indicators such as the decay period, change in soil pH value, increase in organic matter content, bamboo fiber degradation rate, and utilization rate of bamboo powder waste were counted respectively. The specific results are shown in Table 1.

[0036] Index Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Decay period April to June Natural decay > 120 months 18 to 24 months 24 to 48 months Change in soil pH value 6.5～7.0 6.5～7.0 4.5～5.0 6.0～7.5 Increase in organic matter content 25～30％ No obvious change ＜5％ 5～10％ Bamboo fiber degradation rate 95～98％ Natural degradation < 5% 40～50％ 60～70％ Utilization rate of bamboo powder waste ＞95％ 0％ 0％ 0％

[0037] As can be seen from Table 1, compared with the prior art, the present invention can significantly reduce the decay period of bamboo stumps, significantly improve the bamboo fiber degradation rate and soil organic matter content, taking into account both ecological safety and economic benefits.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for removing bamboo stumps, characterized in that: The following steps are involved: Step 1, drilling a plurality of holes on the surface of the bamboo wall along the vertical direction, and then spraying a pretreatment liquid on the surface of the bamboo stump; Step 2: Fill the drill hole with compound bacterial solution and spray the nutrient solution every 5 to 7 days; after 20 to 25 days, fill the drill hole with a decay accelerator every 8 to 12 days until the bamboo stump rots; Step three: After the bamboo stumps have rotted, return them to the field and apply soil conditioners around them.

2. A method for removing bamboo stumps according to claim 1, characterized in that: The diameter of the drill hole in step 1 is 5 to 8 mm and the depth is 10 to 15 cm.

3. A method for removing bamboo stumps according to claim 1, characterized in that: The dosage of the pretreatment liquid in step 1 is 200-300 mL / plant.

4. The method for removing bamboo stumps according to claim 1, characterized in that: The pretreatment liquid in step 1 includes urea, sucrose and water in a mass ratio of 1:2:

200.

5. The method for removing bamboo stumps according to claim 1, characterized in that: In step 2, the dosage of the composite bacterial solution is 5-10 g / well, the dosage of the nutrient solution is 50-100 mL / stump, and the dosage of the accelerator is 10-20 g / well.

6. The method for removing bamboo stumps according to claim 1, characterized in that: The composite bacterial liquid in step 2 includes composite bacterial powder and culture medium in a mass ratio of 1:100, the nutrient solution is a glucose solution with a mass fraction of 0.1-0.2%, and the accelerator includes urea peroxide, ammonium ferric citrate, sodium dodecylbenzene sulfonate, nano titanium dioxide and water in a mass ratio of 15:8:2:1:

75.

7. A method for removing bamboo stumps according to claim 6, characterized in that: The composite fungus powder includes freeze-dried powder of white rot fungi and Bacillus subtilis powder in a mass ratio of 4:1; the culture medium includes bamboo powder, wheat bran, ammonium sulfate, potassium dihydrogen phosphate, magnesium sulfate heptahydrate, glucose and water in a mass ratio of 15:10:0.2:0.1:0.05:0.3:

100.

8. The method for removing bamboo stumps according to claim 1, characterized in that: The application amount of the improver in step 3 is 2-3 kg / m 2 , application range 1~2m 2 .

9. The method for removing bamboo stumps according to claim 1, characterized in that: The improver in step three is activated carbon, humic acid, vermiculite and bentonite, with a mass ratio of 10:1:3:

5.

10. The method for removing bamboo stumps according to claim 1, characterized in that: In step 3, when applying the improver, 0.2% of EM fungus is applied as an auxiliary agent, and the application amount is 20-30g / m 2 .