A method to promote the germination of upland rice and improve soil physical and chemical properties

Abstract

This invention provides a method for promoting the germination of upland rice and improving soil physicochemical properties, belonging to the field of upland soil improvement technology. This invention adds modified cellulose and biochar to the soil at a mass percentage of 0.55%–0.6%. By applying modified cellulose and biochar in combination, it can increase the biomass of upland rice to a certain extent, reduce soil moisture loss, decrease soil hardness and compaction, and increase the content of nitrate nitrogen, available phosphorus, and available potassium in the soil, showing the potential and trend of increasing soil nutrients. Therefore, the combined application of modified cellulose and biochar can not only significantly increase the germination effect of upland rice but also effectively retain soil moisture and nutrients, which is of great significance for upland soil improvement and alleviating water shortages.

Description

Technical Field

[0001] This invention relates to the field of dryland soil improvement technology, and in particular to a method for promoting the germination of dryland rice and improving the physical and chemical properties of soil. Background Technology

[0002] Rice is one of the world's most important cereal crops, providing a staple food for nearly half the world's population. As rice is a water-intensive crop, its production water consumption accounts for approximately 70% of agricultural water use. While upland rice can be cultivated in dry land, its water requirement is only one-quarter or even less than that of rice, but still slightly higher than crops like corn and wheat. Meanwhile, seed germination refers to a series of ordered physiological and morphological processes that begin with seed imbibition. The germination characteristics and emergence ability of seeds not only determine seedling traits such as uniformity and vigor, but also significantly influence the yield of the later crop. Since seed germination begins with water absorption and swelling, water plays a crucial role in normal seed germination. Therefore, ensuring the germination effect of upland rice seeds in arid regions is of great significance for improving upland rice yield, alleviating water shortages, and coping with drought.

[0003] Furthermore, the retention and utilization rate of soil nutrients are fundamental to sustainable agricultural development and constrain food yield and security. Therefore, there is an urgent need for a method that can both ensure the germination of upland rice seeds in arid regions and improve soil physicochemical properties and retain soil nutrients. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a method for promoting the germination of upland rice and improving the physical and chemical properties of soil. This invention uses modified cellulose and biochar in combination, which can not only significantly increase the germination effect of upland rice, but also effectively maintain soil moisture and nutrients.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for promoting the germination of upland rice and improving the physical and chemical properties of soil involves adding a composition to the soil at a mass percentage of 0.55% to 0.6%, wherein the composition is modified cellulose and biochar.

[0007] Preferably, the modified cellulose is one or more of carboxymethyl cellulose ammonium, carboxymethyl cellulose sodium, and carboxymethyl cellulose potassium.

[0008] Preferably, the distilled water absorption ratio of the ammonium carboxymethyl cellulose is ≥100, the distilled water absorption ratio of the sodium carboxymethyl cellulose is ≥45, and the distilled water absorption ratio of the potassium carboxymethyl cellulose is ≥130.

[0009] Preferably, the biochar is rice straw biochar, which is made from rice straw as raw material through incomplete combustion at 800°C.

[0010] Preferably, the biochar contains nitrogen, phosphorus, and potassium in a ratio of (5-6):(1-2):(17-18), has a pH of 8-9, and a density of 0.30 g / cm³. 3 ~0.35g / cm 3 It contains 60% to 70% carbon.

[0011] Preferably, the weight ratio of the modified cellulose to biochar is (0.5-1):5.

[0012] Preferably, the composition needs to be mixed evenly with the soil at a depth of 0cm to 20cm in the cultivated land.

[0013] Preferably, the composition can be used in conjunction with fertilizer.

[0014] Beneficial Technical Effects: This invention provides a method for promoting the germination of upland rice and improving soil physicochemical properties. The invention adds modified cellulose and biochar to the soil at a mass percentage of 0.55%–0.6%. By applying modified cellulose and biochar in combination, it can increase the biomass of upland rice to a certain extent, reduce soil moisture loss, decrease soil hardness and compaction, and increase the content of nitrate nitrogen, available phosphorus, and available potassium in the soil, demonstrating the potential and trend of increasing soil nutrients. Therefore, the combined application of modified cellulose and biochar can not only significantly increase the germination effect of upland rice but also effectively retain soil moisture and nutrients, which is of great significance for improving dryland soils and alleviating water shortages. Attached Figure Description

[0015] Figure 1 The effects of different treatment groups on the germination of upland rice; among them, Figure 1 A represents the changes in rice seedling height in treatment groups A1, A2, B1, B2, C1, C2, D1, and CK. Figure 1 B represents the changes in rice seedling height in treatment groups A1D1, A2D1, B1D1, B2D1, C1D1, C2D1, and the CK treatment group;

[0016] Figure 2 The effect of different treatment groups on the aboveground biomass of upland rice; different lowercase letters among the different treatment groups indicate significant differences.

[0017] Figure 3 The changes in soil moisture loss among different treatment groups; among them, Figure 3 A represents the changes in soil moisture loss in treatment groups A1, A2, B1, B2, C1, C2, D1, and CK. Figure 3B represents the changes in soil moisture loss in treatment groups A1D1, A2D1, B1D1, B2D1, C1D1, C2D1, and CK. Detailed Implementation

[0018] This invention provides a method for promoting the germination of upland rice and improving the physical and chemical properties of soil, wherein a composition is added to the soil at a mass percentage of 0.55% to 0.6%, and the composition is modified cellulose and biochar.

[0019] In this invention, the modified cellulose is preferably one or more of carboxymethyl cellulose ammonium, carboxymethyl cellulose sodium, and carboxymethyl cellulose potassium. Preferably, the distilled water absorption ratio of the carboxymethyl cellulose ammonium is ≥100, the distilled water absorption ratio of the carboxymethyl cellulose sodium is ≥45, and the distilled water absorption ratio of the carboxymethyl cellulose potassium is ≥130. Modified cellulose is a cross-linked polymer with a unique network structure and hydrophilic functional groups, giving it the ability to absorb and retain water. Furthermore, modified cellulose is one form of straw reuse, derived from natural biological materials, and degrades into soil organic matter, exhibiting good eco-friendliness and sustainable utilization. Simultaneously, the combined application of modified cellulose with fertilizers also has water and fertilizer retention properties, promoting crop yield increase, and is one of the important means to solve water shortages and improve crop yield. However, precisely because of the extremely strong polarity of modified cellulose, it can significantly enhance soil cohesion, easily causing soil compaction, which is detrimental to the rooting and emergence of seedlings. This invention combines modified cellulose with biochar, which can significantly reduce soil compaction caused by the use of modified cellulose.

[0020] In this invention, the biochar is preferably rice straw biochar, which is made from rice straw through incomplete combustion at 800°C; the preferred content ratio of nitrogen, phosphorus, and potassium in the biochar is (5-6):(1-2):(17-18), the preferred pH value is 8-9, and the preferred density is 0.30 g / cm³. 3 ~0.35g / cm 3 The carbon content is preferably 60% to 70%. Due to its unique porous structure, biochar can change the soil nutrient cycle through its own adsorption, improve soil fertility and increase nutrient utilization efficiency, and retain soil moisture for crop use to a certain extent. However, the effect of biochar on soil improvement is uncertain. This invention uses biochar and modified cellulose in combination, which can not only effectively increase the adsorption of water and nutrients, but also make up for the lack of soil loosening and soil bulk density effects of modified cellulose.

[0021] In this invention, the preferred weight ratio of modified cellulose to biochar is (0.5-1):5. By limiting the addition ratio of modified cellulose and biochar, this invention achieves a balance between their adsorption of water and nutrients and their loosening effect on the soil. This avoids the inhibitory effect of soil compaction and excessive compaction on the germination of upland rice, while also improving the physical and chemical properties of the soil and ensuring the water and nutrients required for crop growth.

[0022] In this invention, the composition needs to be evenly mixed with the soil at a depth of 0cm to 20cm in cultivated land. The composition can be directly applied to the soil surface, but it needs to be evenly mixed with the soil to a certain depth through tilling or other means to ensure that the composition can fully exert its effect.

[0023] In this invention, the composition can be used in conjunction with fertilizers; the fertilizers are preferably common rice fertilizers such as nitrogen fertilizer, potassium fertilizer, and phosphorus fertilizer, more preferably urea and / or potassium dihydrogen phosphate; the amount of fertilizer added is preferably 300 kg / ha to 400 kg / ha based on nitrogen, preferably 100 kg / ha to 150 kg / ha based on phosphorus pentoxide, and preferably 55 kg / ha to 65 kg / ha based on potassium. This invention, through the combined application of modified cellulose and biochar in the composition, increases the retention and utilization rate of soil nutrients, effectively reducing the amount of chemical fertilizers used in upland rice cultivation, thus reducing the damage of chemical fertilizers to the soil and lowering costs.

[0024] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments. Unless otherwise specified, the materials, reagents, etc., used in the embodiments and experimental examples of the present invention can be obtained commercially; unless otherwise specified, the methods used in the embodiments and experimental examples of the present invention are conventional methods.

[0025] Example

[0026] 1. Materials and Methods

[0027] 1.1 Test Materials

[0028] (1) Experimental location: Artificial climate greenhouse of the Institute of Wetland Agriculture and Ecology, Shandong Academy of Agricultural Sciences.

[0029] (2) Test Soil: The test soil was collected from the Jinan Experimental Station of the Institute of Wetland Agriculture and Ecology, Shandong Academy of Agricultural Sciences (36°42′21″N 117°4′53″E). The average temperature in this area in 2021 was 14.2℃, and the average annual precipitation was 715 mm, mostly concentrated in June to August. The test soil was collected from the 0cm to 20cm soil layer in this area. Its basic physicochemical properties were: pH 7.81, organic matter 9.21 g / kg, available nitrogen 48.37 mg / kg, available phosphorus 24.81 mg / kg, and available potassium 192 mg / kg.

[0030] (3) Experimental dryland rice variety: Taixuan No. 1.

[0031] (4) Other raw materials: The tested fertilizers were urea (Sinopharm Group, CH4N2O content ≥99.0%) and potassium dihydrogen phosphate (Sinopharm Group, KH2PO4 content ≥99.5%). The tested modified celluloses were developed and provided by the School of Materials Science and Engineering of Beijing Institute of Technology, namely carboxymethyl cellulose ammonium (CMC-NH4, pale yellow flocculent, acidic), carboxymethyl cellulose sodium (CMC-Na, white powder, alkaline) and carboxymethyl cellulose potassium (CMC-K, white flocculent, alkaline), with distilled water absorption ratios of 102.2, 49.7 and 134.9, respectively. The biochar tested was provided by Zhenjiang Zedi Agricultural Biotechnology Co., Ltd., and was made from rice straw through incomplete combustion at 800℃. Its basic properties are as follows: total nitrogen content is 5.21 g / kg, total phosphorus content is 1.12 g / kg, total potassium content is 17.23 g / kg, pH is 8.35, density is 0.325 g / cm3, and carbon content is 69%.

[0032] 1.2 Experimental Design

[0033] The pots used in the potted experiment had an inner diameter of 16.5 cm and a height of 17 cm. The experiment was conducted on January 25, 2022 (day 1 of the experiment). 2 kg of air-dried soil, sieved through a 6 mm sieve, was used to evenly sow 6 upland rice seeds, covering them with approximately 1.5 cm of soil. After sowing, the soil was moistened with 200 mL of distilled water. Watering was then carried out on days 4, 6, 8, 12, and 16 according to the water requirements of the upland rice, with watering amounts of 150 mL, 150 mL, 100 mL, 100 mL, and 100 mL respectively, for a total of 800 mL. Watering was stopped after day 16, and a drought treatment was initiated for 20 days.

[0034] Before the experiment, the concentrations of each experimental material were designed by conducting preliminary experiments and reviewing relevant literature. Ultimately, 14 treatments were determined, with each treatment replicated three times (see Table 1). Each treatment received 0.21 g of urea and 0.08 g of potassium dihydrogen phosphate. Modified cellulose, biochar, fertilizer, and soil were thoroughly mixed and then placed together in flowerpots. The artificial climate greenhouse used for this experiment maintained a temperature of 25℃, a wind speed of 1 m / s, and a light duration of 8 h / d.

[0035] Table 1 Processing Settings

[0036]

[0037] 1.3 Sample Determination

[0038] Plant height was monitored on days 4, 6, 8, 12, 16, and 20 of the experiment. Soil was weighed before and after each irrigation. After all rice seeds had germinated (day 20 of the experiment), the dry weight of the above-ground plant parts was measured (dried at 80℃ to a constant weight). After the drought treatment ended (day 36 of the experiment), soil compaction was determined using a soil compaction meter (STEPS 41010, Germany); the thickness of the soil surface crust was measured using a ruler; soil nitrate nitrogen and ammonium nitrogen were determined using a flow analyzer (Braun and Lübbe, Germany); available phosphorus was determined using the molybdenum-antimony colorimetric method; and available potassium was determined using flame photometry.

[0039] 1.4 Data Analysis

[0040] Data processing was performed using Microsoft Office Excel 2016. Graphs were plotted using Origin 8.5 software. One-way ANOVA using SPSS 20.0 software was used to compare the significance of different amounts of modified cellulose added on soil physicochemical properties. All results are expressed as mean ± standard deviation.

[0041] 2 Results and Analysis

[0042] 2.1 Effects of different treatment groups on the germination of upland rice

[0043] The effects of different treatment groups on the height of upland rice seedlings, such as Figure 1 As shown. By Figure 1A indicates that the CK-treated rice ceased growth after approximately 20 days of growth. Applying only a low concentration of CMC-NH4 to the soil significantly promoted rice germination; however, applying only a high concentration of CMC-NH4 had no significant effect. Similar to CMC-NH4, applying only a low concentration of CMC-Na significantly promoted rice germination, while applying only a high concentration of CMC-Na had no significant effect. Applying CMC-K to the soil had a certain promoting effect on rice germination, but applying only a low concentration of CMC-K was superior to applying only a high concentration. Applying only 0.5% biochar to the soil also had a certain promoting effect on rice germination. Figure 1 As shown in B, the combined application of modified cellulose and biochar can significantly promote the germination of upland rice, while also greatly reducing the differences caused by different concentrations of the same modified cellulose. Overall, when the three types of modified cellulose are applied in combination with biochar, the combination of CMC-NH4 and biochar has the most significant effect on promoting the germination of upland rice, followed by CMC-Na, and lastly CMC-K.

[0044] The effects of different treatment groups on the aboveground biomass of upland rice are as follows: Figure 2 As shown. By Figure 2 It was found that, compared with the control treatment, only treatments A2 and B2 significantly reduced the aboveground biomass of upland rice, decreasing by 37.38% and 30.10% respectively compared to the control group; the remaining treatments significantly increased the aboveground biomass of upland rice to varying degrees, ranging from 18.93% to 224.76%. When only three types of modified cellulose were applied, the aboveground biomass of the low-concentration treatment was higher than that of the high-concentration treatment. Compared with the treatment with high-concentration modified cellulose alone, all treatments with high-concentration modified cellulose combined with biochar significantly increased the aboveground biomass of upland rice, especially treatment A2D1, which was the most significant, reaching 295.35%; while compared with the treatment with low-concentration modified cellulose alone, only treatment A1D1 significantly increased the aboveground biomass of upland rice, reaching 6.70%. Overall, there was also a trend that the aboveground biomass of the low-concentration modified cellulose combined with biochar treatment was higher than that of the high-concentration modified cellulose combined with biochar treatment, with CMC-NH4 being the most significant.

[0045] 2.2 Effects of different treatment groups on soil moisture

[0046] Changes in soil moisture loss in different treatment groups are as follows: Figure 3 As shown. By Figure 3As shown in Figure A, after applying CMC-NH4 to the soil, the soil moisture loss of treatments A1 and A2 was lower than that of the control (CK) treatment at days 4 and 6, while the soil moisture loss of the latter two treatments was higher than that of the CK treatment, especially at day 12. After applying CMC-Na to the soil, the soil moisture loss of treatments B1 and B2 was lower than that of the CK treatment at days 4, 6, and 8, but as time progressed, the soil moisture loss of the latter two treatments was higher than that of the CK treatment, again showing a significant difference at day 12. Similar to CMC-Na, the soil moisture loss of treatments C1 and C2 was only lower than that of the CK treatment at days 4, 6, and 8, while the soil moisture loss of the latter two treatments was higher than that of the CK treatment. The effect of applying biochar to the soil on soil moisture loss was not significant and was basically consistent with that of the CK treatment. When the three modified celluloses were applied in combination with biochar, the soil moisture loss of each treatment at the first 8 days of the experiment was significantly different from that when applied alone. Figure 3 A) The differences were small, but the soil moisture loss in each treatment tended to decrease in the later stages, especially on day 12.

[0047] The cumulative water loss of different treatment groups is shown in Table 2. As can be seen from Table 2, compared with the control group, the application of the three modified cellulose and biochar alone had no significant effect on the cumulative soil water loss (P>0.05); however, the combined application of the three modified cellulose and biochar tended to reduce soil water loss, especially the A2D1, B1D1 and B2D1 treatments, which showed a significant reduction effect of 6.33% to 8.86%.

[0048] Table 2. Cumulative water loss in different treatment groups

[0049]

[0050] Note: Different lowercase letters between different treatment groups indicate significant differences.

[0051] 2.3 Effects of different treatment groups on soil physicochemical properties

[0052] The effects of different treatment groups on the physicochemical properties of the soil after cultivation are shown in Table 3. Table 3 shows that CMC-NH4 alone significantly reduced soil pH by 0.17–0.20 units; while the treatment combining CMC-NH4 and biochar increased soil pH. CMC-Na alone significantly increased soil pH by 0.32–0.43 units; the treatment combining CMC-Na and biochar also significantly increased soil pH, but had no significant effect compared to the CMC-Na alone treatment. Applying a higher dose of CMC-K significantly increased soil pH by 0.20 units; the treatment combining CMC-K and biochar also significantly increased soil pH, but compared to the CMC-K alone treatment, only the C1D1 treatment showed a significantly higher soil pH than the C1 treatment. Biochar alone also significantly increased soil pH by 0.42 units. After applying CMC-Na alone, the soil hardened and formed clumps, with a significant increase in soil compaction, reaching 99.66%–113.58%. After applying CMC-NH4 alone, the soil surface hardened and formed small clumps, which could also enhance soil compaction to some extent, reaching 13.69%–22.90%. However, applying CMC-K alone and applying biochar alone had no significant effect on soil clumping and soil compaction. Similar to the treatment with CMC-Na alone, the treatment with CMC-Na combined with biochar showed hard soil with clump formation and a significant increase in soil compaction, reaching 69.81%–83.16%. When CMC-NH4 was applied in combination with biochar, only the A2D1 treatment showed relatively hard soil with small clump formation and a significant increase in soil compaction, reaching 8.42%. The treatment with CMC-K combined with biochar had no significant effect on soil clumping and soil compaction. Regardless of whether it was applied in combination with biochar, all three modified cellulose treatments formed a crust on the surface, and the thickness increased with the increase of the modified cellulose application rate. The effect was most significant with the application of CMC-NH4 alone, followed by CMC-Na, while the CMC-K treatment produced the thinnest crust. It was also observed that when the three modified celluloses were applied in combination with biochar, both soil compaction and surface crust thickness were significantly reduced.

[0053] Table 3 Physicochemical properties of soil after cultivation in different treatment groups

[0054]

[0055]

[0056] Note: For the same test item, different lowercase letters between different treatment groups indicate significant differences.

[0057] 2.4 Effects of different treatment groups on nitrogen, phosphorus, and potassium elements in soil

[0058] The effects of different treatment groups on nitrogen, phosphorus, and potassium in the soil are shown in Table 4. Table 4 shows that after applying CMC-NH4 only to the soil, treatment A2 significantly increased the contents of ammonium nitrogen and nitrate nitrogen, reaching 275.84% and 46.88%, respectively; treatments A1 and A2 both significantly increased the contents of available phosphorus, reaching 20.93% and 17.94%, respectively; treatments A1 and A2 also significantly increased the contents of available potassium, reaching 13.33% and 11.33%, respectively. After applying CMC-Na only to the soil, treatments B1 and B2 significantly increased the contents of nitrate nitrogen, reaching 38.35% and 27.08%, respectively; treatments B1 and B2 significantly increased the contents of available phosphorus, reaching 62.46% and 45.68%, respectively; treatments B1 and B2 significantly increased the contents of available potassium, reaching 6.67% and 12.00%, respectively. After applying CMC-K to the soil, treatments C1 and C2 significantly reduced soil ammonium nitrogen content by 51.01% and 53.02%, respectively; treatments C1 and C2 significantly increased soil nitrate nitrogen content by 47.66% and 19.80%, respectively; treatments C1 and C2 also significantly increased soil available phosphorus content by 56.81% and 30.15%, respectively; and treatments C1 and C2 also significantly increased soil available potassium content by 54.00% and 88.67%, respectively. Application of biochar alone also significantly increased soil nitrate nitrogen, available phosphorus, and available potassium content by 12.98%, 28.82%, and 8.00%, respectively. The combined application of CMC-NH4 and biochar significantly increased soil nitrate nitrogen, available phosphorus, and available potassium contents, reaching 22.80%-26.07%, 21.84%-25.25%, and 10.00%-13.33%, respectively; only the A2D1 treatment significantly increased soil ammonium nitrogen content, reaching 48.99%. The combined application of CMC-Na and biochar significantly increased soil nitrate nitrogen, available phosphorus, and available potassium contents, reaching 24.55%-27.15%, 56.31%-64.20%, and 8.00%-14.67%, respectively. The combined application of CMC-K and biochar significantly reduced soil ammonium nitrogen content, reaching 41.61%-45.64%; however, it significantly increased soil nitrate nitrogen, available phosphorus, and available potassium content, reaching 25.16%-34.87%, 43.94%-54.49%, and 61.33%-96.00%, respectively. Compared with the application of modified cellulose alone, the combined application of the three modified cellulose and biochar treatments could increase soil nutrients to some extent, especially the soil nitrate nitrogen content in the A1D1 treatment was significantly higher than that in the A1 treatment; the soil available potassium content in the C1D1 and C2D1 treatments was significantly higher than that in the C1 and C2 treatments, respectively.

[0059] Table 4. Effects of different treatment groups on nitrogen, phosphorus, and potassium levels in soil.

[0060]

[0061]

[0062] Note: For the same test item, different lowercase letters between different treatment groups indicate significant differences.

[0063] In summary, applying low doses of modified cellulose can promote the growth of upland rice seedlings by improving soil nutrients and moisture; applying high doses of modified cellulose can limit crop growth and development; biochar can also promote upland rice development to some extent by improving soil physicochemical properties. The combined application of modified cellulose and biochar can significantly alleviate the problems of soil compaction and excessive compaction caused by applying modified cellulose alone, and also maximizes the soil's response to biochar application, thereby increasing soil nutrient content and upland rice biomass. Therefore, the combined application of modified cellulose and biochar can achieve a "1+1>2" effect, more effectively leveraging the roles of both, and providing a new reference for water-saving agriculture development and increasing crop water and nutrient use efficiency.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for promoting the germination of upland rice and improving soil physical and chemical properties, characterized in that, Combination The material is added to the soil at a mass percentage of 0.55% to 0.6%, and the composition is modified cellulose. and biochar; the modified cellulose is carboxymethyl cellulose ammonium, carboxymethyl cellulose sodium, carboxymethyl cellulose... One or more of the vitamin C and potassium, wherein the biochar is rice straw biochar, which is made from rice straw as the raw material. The material is produced by incomplete combustion at 800°C, wherein the weight ratio of the modified cellulose to biochar is [missing information]. （0.5~1）：5。 2. The method for promoting the germination of upland rice and improving the physical and chemical properties of soil according to claim 1, wherein the method has the following characteristics: The characteristic is that the distilled water absorption ratio of the carboxymethyl cellulose ammonium is ≥100, and the carboxymethyl cellulose... The water absorption ratio of sodium in distilled water is ≥45, and the water absorption ratio of potassium carboxymethyl cellulose in distilled water is ≥130.

3. The method for promoting the germination of upland rice and improving soil physical and chemical properties according to claim 1, wherein the method has the following characteristics: The characteristic is that the content ratio of nitrogen, phosphorus, and potassium in the biochar is (5~6):(1~2): (17~18), pH value 8~9, density 0.30g / cm3~0.35g / cm3, carbon content 60%~70%.

4. The method for promoting the germination of upland rice and improving soil physical and chemical properties according to claim 1, wherein the method has the following characteristics: The characteristic is that the composition needs to be mixed evenly with the soil at a depth of 0cm to 20cm in the cultivated land.

5. The method for promoting the germination of upland rice and improving soil physical and chemical properties according to claim 1, wherein the method has the following characteristics: The characteristic is that the composition is used in conjunction with fertilizer.

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