KR102254919B1 - Soil conditioner in pellet form containing bamboo biochar and condensed molasses soluble, and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a pellet-shaped soil improving agent including bamboo biochar and molasses concentrate, and a method for manufacturing the same. The soil improving agent according to the present invention is added to the soil to reduce methane emission from the soil, and accordingly it reduces the generation of methane, which is a greenhouse gas, thereby contributing to the prevention of global warming. In addition, in addition to the effect of reducing methane in the soil, the soil improving agent can also effectively improve soil quality by stabilizing the soil as a soil organic material, thereby contributing to an increase in agricultural productivity.

Description

Soil conditioner in pellet form containing bamboo biochar and condensed molasses soluble, and manufacturing method thereof

The present invention relates to a soil conditioner in the form of a pellet comprising bamboo bio-tea and molasses concentrate, and a method for producing the same.

Rice is one of the most important food sources grown on about 11% of the world's arable lands (de Miranda et. al. , American Journal of Plant Sciences , 6:2009-2018, 2015). Since rice production systems are usually grown in paddy fields, they generally require more water than other crops. _{However, these cultivation systems affect climate by releasing methane (CH 4} ), a major greenhouse gas that causes climate change, into the atmosphere (Wu et. al. , Environmental Pollution , 253:1038-1046, 2019), and methane is It is known that the greenhouse effect is 25 times higher than that of carbon dioxide (CO _{2 ).} Methane (CH ₄ ) in rice fields is produced by decomposition of organic matter by methane-producing bacteria under anaerobic conditions, and is affected by soil temperature, redox potential, and soil properties. According to FAO (2009), rice is consumed by more than half of the world's population, so it has been reported that rice production needs to be increased by 40% by 2030 to meet the demand for population growth. In particular, rice farming in Asia is very important socioeconomically. Accordingly, cultivation management to reduce methane while stably increasing production is urgent.

As such, agriculture is a major source of greenhouse gas emissions, and rice paddies in particular are known as a major source of methane. Accordingly, there is a need for a technology capable of reducing methane while maintaining rice productivity.

On the other hand, fertilizers are substances applied to the soil to nourish plants and aid plant growth. In particular, inorganic fertilizers are widely used to increase rice yield and to secure stable rice productivity because of their high convenience and effectiveness. However, excessive use of inorganic fertilizers in farmland results in an imbalance of nutrients in the soil and lowers the content of organic matter in the soil, thereby reducing soil fertility.

Biochar is a carbon-rich solid material produced by pyrolysis of various biomass in an oxygen-limited environment (Kim et. al. , Geoderma , 232-234:341-351, 2014). Biotea is an excellent tool to reduce greenhouse gases in the atmosphere and has been reported to act as a soil conditioner that can increase soil fertility (Jindo et. al. , Bioresource Technology , 110:396-404, 2012). There are a variety of biochas depending on the type of biomass used. However, despite these advantages, since the fertilizer content is generally low, there is a limit to use for continuous crop production (Shin et. al. , Journal of Environmental Management , 244:92-98, 2019).

Under this background, the present inventors have conducted intensive research to develop a soil conditioner to efficiently reduce methane production and stable production of rice.As a result, a soil conditioner in the form of pellets produced by mixing bamboo-derived biochar with molasses concentrate. In addition to the effect of reducing methane in the soil, the present invention was completed by stabilizing the soil as soil organic matter to effectively improve soil quality.

de Miranda et. al., American Journal of Plant Sciences, 6: 2009-2018, 2015 Wu et. al., Environmental Pollution, 253:1038-1046, 2019 Kim et. al., Geoderma, 232-234:341-351, 2014 Jindo et. al., Bioresource Technology, 110:396-404, 2012 Shin et. al., Journal of Environmental Management, 244:92-98, 2019

One object of the present invention is to develop a soil conditioner for stable production of rice and efficiently reduce the amount of methane generated, and to provide a method for producing a soil conditioner in the form of pellets including bamboo biotea and molasses concentrate.

In addition, it is to provide a soil conditioner in the form of a pellet comprising the bamboo bio-tea and molasses concentrate prepared by the above manufacturing method.

In order to achieve the above object, the present invention comprises the steps of: a) pulverizing biochar obtained by pyrolyzing dried bamboo; b) preparing a mixture of bio-tea and molasses concentrate by mixing the bio-tea with molasses concentrate; And c) preparing the mixture in the form of pellets; containing, a method for preparing a soil conditioner in the form of pellets including bamboo bio-tea and molasses concentrate.

In addition, the present invention provides a soil conditioner in the form of a pellet comprising the bamboo bio-tea and molasses concentrate prepared by the above manufacturing method.

In the present invention, a soil conditioner in the form of pellets produced by mixing bamboo-derived biochar produced by pyrolysis of bamboo at 500°C to 700°C for 1 to 7 hours with molasses concentrate is added to the soil to produce methane in the soil. By reducing the amount of emissions, it can contribute to the prevention of global warming by reducing the generation of methane, which is a greenhouse gas. In addition, in addition to the effect of reducing methane in the soil, the soil modifier according to the present invention stabilizes the soil as soil organic matter, thereby effectively improving soil quality, thereby contributing to the increase of agricultural productivity.

1 is a diagram showing a biochar manufacturing apparatus and a pellet manufacturing apparatus used in an embodiment of the present invention.
2 is a diagram showing an average daily precipitation and temperature during rice cultivation. Here, Max. is the maximum temperature, Min. is the minimum temperature, and Ave. is the average temperature.
3 is a diagram schematically showing a process of manufacturing bamboo bio-tea pellets according to the present invention. Here, Grinding refers to the step of crushing bamboo bio tea, Supplement refers to the step of blending by adding molasses concentrate used as a binder to the pulverized bio tea, and Extrusion refers to mixing bamboo bio tea and molasses concentrate and then using an extrusion device. And the extruding step, and Production refers to the step of producing bamboo bio-tea pellets.
4 is a diagram showing the change in _{methane (CH 4} ) emission during the rice cultivation period (cropping season) and the fallow season (fallow season). Here, Control is a control group (no treatment group), IF is an inorganic fertilizer treatment group, and BC_PT is a bamboo biotea pellet treatment group. Error bars represent standard deviation (n=3).

The present invention relates to a soil conditioner in the form of a pellet comprising bamboo bio-tea and molasses concentrate, and a method for producing the same.

In one aspect, the present invention comprises the steps of: a) pulverizing biochar obtained by pyrolyzing dried bamboo; b) preparing a mixture of bio-tea and molasses concentrate by mixing the bio-tea with molasses concentrate; And c) preparing the mixture in the form of pellets; containing, a method for preparing a soil conditioner in the form of pellets including bamboo bio-tea and molasses concentrate.

As used herein, the term "biochar" is a compound word of biomass and char, which is a material made to have an intermediate property between organic matter and charcoal. It is a solid material with high carbon content that can be obtained through pyrolysis.

As used herein, the term "biomass" refers to a living or dead biological material that can be used in industrial production, and in particular, bamboo is used as biomass in the present invention.

As used herein, the term "soil conditioner" is a drug used to improve the growth of crops and increase productivity by improving physical, chemical, and biological conditions of the soil. In the present invention, bamboo biotea and It contains molasses concentrate as an active ingredient.

As used herein, the term "condensed molasses soluble (CMS)" is processed by condensing and refining the residual medium produced as a by-product after microbial fermentation using raw sugar or molasses as a raw material. It is called. Molasses concentrate, a by-product of lysine production through molasses fermentation, contains a large amount of organic matter and nitrogen. In the present invention, molasses concentrate is included as an active ingredient of a soil conditioner, and contains a lot of beneficial ingredients for crops such as sugars and amino acids, so it can be used as a nutrient source for soil and plants.

The bio-tea used in one embodiment of the present invention is not limited thereto, but may be a by-product generated by pyrolysis of bamboo at 500°C to 700°C, 550°C to 650°C, or 600°C in step a).

The pyrolysis in step a) is not limited thereto, but may be performed for 1 hour to 7 hours, 2 hours to 6 hours, 3 hours to 5 hours, or 4 hours.

In one embodiment of the present invention, the bamboo biotea obtained by pyrolysis was pulverized using a grinder and a roller, and obtained by passing through a sieve having a pore size of 200 μm. The contents of C, H, O, N, and S in the bamboo biotea prepared through the pyrolysis were found to be 87.2%, 2.79%, 9.63%, 0.54% and 0.01%, respectively.

In step b), the bio-tea: molasses concentrate may be mixed in a weight ratio of 9 to 1: 1 to 9, for example, in a weight ratio of 9:1, 8:2, 6:4, 4:6, 2:8. It may be mixed, but is not limited thereto.

The molasses concentrate mixed with the bio-tea in step b) is not limited thereto, but may be used by diluting 5 times to 15 times, 7 to 13 times, 9 to 11 times, or 10 times by weight with distilled water.

In step c), a soil conditioner in the form of pellets may be prepared using a commercially available pellet maker using the bio-tea and molasses concentrate mixed in a predetermined weight ratio in step b).

0.05 cm 내지 0.5 cm,

0.08 cm 내지 0.4 cm,

0.1 cm 내지 0.3 cm, 또는

0.2 cm 크기일 수 있다. 상기 펠렛은 토양개량제로 사용하기에 적절한 크기로 제조될 수 있다. The pellet of step c) is not limited thereto, but the diameter

0.05 cm to 0.5 cm,

0.08 cm to 0.4 cm,

0.1 cm to 0.3 cm, or

It can be 0.2 cm in size. The pellets may be prepared in a size suitable for use as a soil conditioner.

In addition, although not limited thereto, the pellet prepared in step c) may be further dried using a dry oven after step c).

As another aspect, the present invention provides a soil conditioner in the form of a pellet comprising a bamboo bio-tea and molasses concentrate prepared by the above manufacturing method.

In the present invention, each of the "bio tea", "molasses concentrate" and "soil conditioner" is as described above.

The soil conditioner according to this embodiment contains bamboo biotea pellets composed of C, H, O, N and S, and has the effect of a slow-acting fertilizer that slowly and continuously elutes fertilizer urea.

In one embodiment of the present invention, when the soil modifier is treated on the soil, the soil pH was 5.48 to 5.51, and the soil organic carbon (SOC) content was 5.95 to 5.97 g kg ^-1 . In addition, the total nitrogen (TN) content was 0.72 to 0.77 g kg ^-1 , and the effective P ₂ O ₅ content was 32.2 to 33.3 mg kg ^-1 . Meanwhile, the cation exchange capacity (CEC) was 5.90 to 5.95 cmol _c kg ^-1 . In addition, it was confirmed that _{methane (CH 4} ) emissions were reduced when the soil modifier was treated on the soil.

Therefore, the soil conditioner in the form of pellets containing bamboo bio-tea and molasses concentrate according to the present invention, in addition to the effect of reducing methane in the soil, stabilizes the soil as soil organic matter, effectively acting on improving the soil quality and contributing to the increase of agricultural productivity. Could know.

The soil modifier of the present invention may contain an agriculturally acceptable carrier, and fillers, solvents, excipients, surfactants, suspending agents, spreaders, adhesives ), antifoaming agents, dispersing agents, wetting agents, drift reducitng agents, auxiliary agents, adjuvants, or mixtures thereof.

The soil conditioner of the present invention is the soil conditioner alone or other agricultural preparations, for example, pesticides, insecticides, acaracides, fungicides, bactericides, herbicides, antibiotics, antibacterial agents, sterilization agents. Nematocides, rodenticides, insect pathogens, pheromones, attractants, plant growth regulators, plant hormones, insect growth regulators, chemosterilants, microbial pest control agents, repellents, viruses, phagostimulents, plant nutrients, plant fertilizers and biological control agents, or used sequentially. I can. Examples of the insecticide include carbamate, organic phosphate, organic chlorine insecticide, phenylpyrazole, pyrethroid, neonicotinoid, spinosin, avermectin, milbemycin, larval hormone analogue, alkyl halide, organic Tin compounds, nereistoxin analogues, benzoylurea, diacylhydrazine, METI insecticides of acaricides, chloropicrin, pymetrozine, flonicamid, clopentezine, hexythiazox, ethoxazole , Diafenthiuron, proparzit, tetradifon, chlorfenapyr, DNOC, buprofezin, cyromazine, amitraz, hydramethylnon, acequinosyl, fluacrypyrim, rotenone, or derivatives thereof Pesticides can be used. As the plant nutrient, a commonly used plant nutrient fertilizer may be used. In addition, as the fertilizer, organic fertilizers, complex fertilizers, nitrogen fertilizers, phosphoric acid fertilizers, calcium fertilizers, lime fertilizers, lactic acid fertilizers, sulfuric acid fertilizers, magnesium fertilizers, trace element fertilizers, organic fertilizers, manure fertilizers, and the like may be used. At this time, a specific example of the agricultural formulation is obvious to those of ordinary skill in the art, and can be easily obtained.

Hereinafter, the configuration and effects of the present invention will be described in more detail through examples. These examples are for illustrative purposes only, and the scope of the present invention is not limited by these examples.

Preparation Example 1. Manufacture of Bamboo Bio Tea

Dried bamboo as raw feedstock was used to produce biochar. Biotea was produced through pyrolysis using anaerobic conditions by injecting N _{2 gas in a continuous flow.} At this time, the pyrolysis was performed for 4 hours at 600°C temperature condition. The yield of bamboo biochar (BB) was 28.8%, and the pH was 10.1. In addition, C, H, O, N, and S of BB were 87.2%, 2.79%, 9.63%, 0.54% and 0.01%, respectively. Table 1 below shows the characteristics of the bio-tea produced as described above.

* BET SA: Brunauer, Emmett and Teller equation applied surface area

Preparation Example 2. Soil preparation

The soil used for field cultivation was collected from rice paddies in Seoncheon, Korea. The particle size distribution of the collected soil was sand 34.6%, soil 50.5%, and clay 14.9%. Soil pH and EC (electrical conductivity) were 5.64 and 0.24 dS m ^-1 , respectively, 5.64 g kg ^-1 soil organic carbon (SOC), 0.74 g kg ^-1 total nitrogen (TN), 38.0 mg kg ^-1 effective phosphate (effective P ₂ O ₅ ), 0.09 cmol _c kg ^-1 K, 4.24 cmol _c kg ^-1 Ca, 0.44 cmol _c kg ^-1 Mg, and 5.71 cmol _c kg ^-1 cation exchange capacity ( cation exchange capacity, CEC). The properties of the condensed molasses soluble (CMS) before the start of the experiment were pH 4.43, organic matter (OM) 56.6%, total nitrogen (TN) 6.54%, total phosphorus (TP) 0.18%, and potassium ( K) 0.31%.

Preparation Example 3: Preparation of Bamboo Bio Tea Pellets

In Preparation Example 1, bamboo biochar prepared through pyrolysis at 600° C. for 4 hours was pulverized with a grinder and roller, and passed through a sieve having a pore size of 200 μm before the start of the experiment. The pulverized bio-tea passed through a sieve was selected as a soil amendment, blended with condensed molasses soluble (CMS) and further processed to prepare a biochar pellet (BC_PT). . At this time, the molasses concentrate was used as a binder, and was diluted 10 times with distilled water.

0.2 cm이었다. 상기 혼합한 원료는 교반기를 사용하여 10분 동안 완전히 혼합하였다. 대나무 바이오차와 결합제를 혼합한 후 압출 장치를 통해 대나무 바이오차 펠렛을 생산하는 과정은 도 3에 나타낸 바와 같다. 상기와 같이 제조한 펠렛은 최종적으로 드라이 오븐에 넣고 건조한 후 사용하였다. The bamboo bio-tea and the 10-fold diluted molasses concentrate used as a binder were mixed at a combination ratio of 9:1 (w/w), and the size of the bamboo bio-tea pellets (BC_PT) prepared by putting in an extrusion device was

It was 0.2 cm. The mixed raw materials were thoroughly mixed for 10 minutes using a stirrer. The process of producing bamboo bio-tea pellets through an extrusion device after mixing the bamboo bio-tea and the binder is as shown in FIG. 3. The pellets prepared as described above were finally put in a dry oven and dried before use.

Experimental Example 1: Bamboo bio-tea pellet treatment and rice crop sampling (sampling)

In order to confirm the effect of the bamboo bio-tea pellet prepared in Preparation Example 3 on stable production of rice and reduction of methane emissions, an inorganic fertilizer (IF) and a biochar pellet (BC_PT) were tested as experimental. plot; length (L) 1 m × width (W) 1 m × height (H) 0.5 m), the present invention was carried out at Suncheon National University from 2016 to 2017. This region is greatly affected by the sea climate, but the annual temperature fluctuation is not large. The average annual precipitation in this area was 1249 mm, and the average temperature for two years was 13.4°C (Fig. 2). Each experimental group was divided into a control group, an inorganic fertilizer treatment group (IF, NPK = 90-45-57 kg ha ^-1 ) and a bamboo bio tea pellet treatment group (BC_PT, 1000 kg ha ^{-1 ).} At this time, the bamboo biotea pellet treatment group was applied to the soil by hand and cultivated 14 days before planting.

Dongjin rice ( Oryza sativa , Joponica type) was selected as a raw crop, and it was transplanted on May 25, 2016 and May 24, 2017 at 20 cm intervals in each compartment, and on September 28, 2016 and September 2017. Each was harvested on the 27th of month. Soil samples of each treatment group were collected after rice harvesting. In addition, growth characteristics including plant height, number of tillers, seeds per panicle, weight of 1000 seeds, and grain yield of harvested plant samples were investigated.

Experimental Example 2: Methane (CH ₄ ) monitoring

CH ₄ flux monitoring was performed using a static chamber. Gas sampling was performed on a pot scale between 10 am and 11 am every 7 days. The _{gas for CH 4} measurement was collected using a syringe at 0, 15 and 30 minutes after chamber closure. CH ₄ measurements were simultaneously analyzed by gas chromatograph (GC-2014, Shimadzu) using a flame ionization detector (FID) as described in the GC manual. The temperature of the gas analysis equipment was controlled to 55°C for the column, 100°C for the injector, and 230°C for the FID detector. A gas mixture of argon and methane was used as the carrier gas for _{CH 4.} The CH ₄ flux was calculated using the following equation:

F = ρ×(V/A)×(Δc/Δt)×(273/T)

Where F is the CH ₄ flux, ρ is the _{density of CH 4} , V is the volume of the chamber (m ³ ), A is the area of the chamber (m ² ), Δc/Δt is the average increase in gas concentration, and T is the 273+ chamber. Is the average temperature (°C).

_{The total CH 4} flux for all rice cultivation was determined by Kang et. al. Calculated as described in (2016):

Total CH ₄ flux =

Here, Ri is the CH ₄ emission rate of the sampling interval, Di is the number of days of the sampling interval, and n is the number of sampling intervals.

Experimental Example 3: Soil Analysis

Soil analysis was performed as described in NIAST (2000). Briefly, after harvesting rice, soil samples were collected from the surface layer (15 cm depth) in each treatment group, air-dried, and passed through a 2 mm mesh. The chemical properties of the sieved soil were analyzed by various standard methods. Specifically, the soil pH was measured in a soil-water ratio of 1:5 after shaking the mixture for 30 minutes. In addition, organic matter (OM) and total nitrogen (TN) analysis were performed using the Tyurin method and the Kjeldahl method, respectively. The available phosphorus (effective P ₂ O ₅ ) was performed by the Lancaster method, and the exchangeable cations in the soil were extracted with _{1N-NH 4 OAc.}

Example 1: Rice productivity analysis

The results of the investigation related to the components of the rice yield after application of fertilizers and biotea are shown in Table 2 below. The overall change in the composition of the rice yield was found to be similar or better in 2017 compared to 2016, excluding the control group. It was confirmed that the rice yield component was affected by the application of biotea pellets. Specifically, it was confirmed that the average value of the plant height and the number of tiller was higher in 2016, although it was not significant in all treatment groups among the components of rice yield. In addition, the rice yield component of the inorganic fertilizer (IF) treatment group was slightly better than that of the bamboo bio tea pellet (BC_PT) treatment group in 2016, but no significant difference was observed in the application of fertilizer and bio tea in 2017. Moreover, the rice yield component of the BC_PT treatment group in 2017 showed improved growth compared to the BC_PT treatment group in 2016. Considering the ingredients of rice yield, the rate of increase of 1000 seeds and grain yield also increased.

Specifically, in Table 2 below, the growth characteristics of rice according to various conditions and periods of bio-tea treatment are summarized and shown. In conclusion, it was confirmed that the growth and production of rice are stable because bamboo biotea pellets have the effect of slow-release fertilizer.

^a) Control: Control (no treatment group)

^b) IF: mineral fertilizer treatment group

^c) BC_PT: Bamboo bio tea pellet treatment group

¹ Other letters in the same column indicate significant differences between treatment groups, as determined by Tukey's test with p <0.05.

² ns represents an insignificant difference, and *, ** and *** represent a significant difference at the levels of 5, 1 and 0.1%, respectively.

Example 2: Analysis of chemical properties of soil

It was confirmed that the overall change in the chemical properties of the soil during rice cultivation after application of fertilizer and biotea was remarkably different (Table 3). In particular, compared to 2016, it was confirmed that the soil chemical properties of the bio-tea application in 2017 were more effective than the control and IF treatment groups. Considering these results, the chemical properties of the soil and the rice yield components applied with bio-tea showed similar trends. Regardless of the sampling year, the range of chemical properties of the soil after rice harvesting was as shown in Table 3 below, respectively, when the bio-tea was untreated and treated. Specifically, when biocar was not treated and treated, the soil pH was 5.14-5.24 and 5.48-5.51, respectively, and the soil organic carbon (SOC) content was 5.22-5.56 and 5.95-5.97 g kg ^-1 . In addition, the total nitrogen (TN) content was 0.67-0.79 and 0.72-0.77 g kg ^-1 , and the effective P ₂ O ₅ content was 28.7-32.8 and 32.2-33.3 mg kg ^-1 . Meanwhile, the cation exchange capacity (CEC) was 5.48-5.64 and 5.90-5.95 cmol _c kg ^-1 .

^a) Control: Control (no treatment group)

^b) IF: mineral fertilizer treatment group

^c) BC_PT: Bamboo bio tea pellet treatment group

¹ Other letters in the same column indicate significant differences between treatment groups, as determined by Tukey's test with p <0.05.

² ns represents an insignificant difference, and *, ** and *** represent a significant difference at the levels of 5, 1 and 0.1%, respectively.

Example 3: Methane (CH ₄ ) Change in emissions

It _{was confirmed that the change in CH 4} emission was significantly different depending on the application of the bio-tea and the sampling period (FIG. 4). CH ₄ emissions increased rapidly due to flooding, and it was confirmed that it peaked in about 2 months after planting between 2016 and 2017. Regardless of the treatment conditions, the CH ₄ emission pattern changed similarly during the rice cultivation period and the fallow period. In addition, regardless of the treatment conditions, the annual CH ₄ flux scale was mostly observed during the rice cultivation period, and it was confirmed that there was little effect during the fallow period (Table 4). In all treatment groups CH ₄ emissions were maintained at 0.65-26.8 mg m ^-2 hr ^-1 range for rice cultivation period, and was maintained at -0.61-3.47 mg m ^-2 hr ^-1 range during fallow period. The bamboo biotea pellet (BC_PT) treatment group showed a relatively low CH ₄ emission rate of ^{6.4-6.6 mg m -2} hr ^-1 on average during the rice cultivation period compared to the inorganic fertilizer (IF) treatment group. In the mineral fertilizer (IF) treatment group, CH ₄ ^{flux was released at 24.4 gm -2} during the rice cultivation period in 2016 and ^{3.48 gm -2} during the fallow period. In addition, the CH ₄ flux was released ^{at 23.3 gm -2} during the 2017 rice cultivation period. In particular, compared with the inorganic fertilizer (IF) treatment group, when bamboo biotea pellets were applied, the CH ₄ flux was significantly reduced to ^{5.0 gm -2} and 3.2 gm ^-2 during the rice cultivation period in 2016 and 2017, respectively.

Specifically, in Table 4 below, the amount of methane generation, that is, the total CH ₄ flux, according to various bio-tea treatment conditions, was measured and shown during the rice cultivation period, the fallow period, and the year. This is the result of confirming the methane generation pattern and the amount of methane produced during the rice cultivation period, and in conclusion, it was confirmed that the bamboo biotea pellet treatment group reduced the amount of methane generation compared to other treatment groups (FIG. 4).

^a) Control: Control (no treatment group)

^b) IF: mineral fertilizer treatment group

^c) BC_PT: Bamboo bio tea pellet treatment group

^* Other letters in the same column indicate significant differences between treatment groups, as determined by Tukey's test with p <0.05.

Summarizing the above series of results, the bamboo biotea of the present invention manufactured by pyrolyzing bamboo, which is biomass under anaerobic conditions, has high nutrient retention and improves soil fertility to maintain a healthy paddy environment, but lacks nutrients and has its effect. Did not last. On the other hand, molasses concentrate contains a large amount of organic matter and nitrogen, so it can be used as a nutrient source for soil and plants, and can be used as a pellet binder for bio-tea in terms of efficient recycling of resources and environmental preservation. Accordingly, it was confirmed that when pellets were prepared by mixing molasses concentrate with bamboo bio-tea lacking nutrients, it was not only a continuous source of nutrients for rice in rice cultivation, but also reduced methane generation, which was advantageous for the rice cultivation environment.

Therefore, through the above series of results, it was confirmed that a mixture of bamboo bio-tea and molasses concentrate can be made into pellets to reduce methane production and stable production of rice during the rice cultivation period, and this can be used as a useful soil conditioner. Could know.

Claims (8)

a) pulverizing biochar obtained by pyrolyzing the dried bamboo;
b) preparing a mixture of bio-tea and molasses concentrate by mixing the bio-tea with molasses concentrate in a weight ratio of 9 to 8: 1 to 2; And
c) preparing the mixture in the form of pellets; comprising, a method for producing a soil conditioner in the form of pellets containing bamboo bio-tea and molasses concentrate,
The molasses concentrate in step b) is a method for preparing a soil conditioner in pellet form, characterized in that the molasses concentrate is diluted 5 to 15 times by weight with distilled water.
The method of claim 1, wherein the pyrolysis in step a) is performed at 500°C to 700°C.
The method according to claim 1, wherein the pyrolysis in step a) is carried out for 1 to 7 hours.
delete delete The method of claim 1, wherein the pellet of step c) has a diameter

0.05 cm to 0.5 cm.
A soil improver in the form of pellets comprising bamboo biotea and molasses concentrate prepared by the method of any one of claims 1 to 3 or 6, wherein the soil improver increases crop productivity and reduces methane generation. It is a soil conditioner. delete

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