Cloning fragmentation regulation and control method for bamboo clusters of bamboo forest for clustered bamboo shoots

Abstract

The invention discloses a clone fragmentation regulation and control method of a bamboo forest and a bamboo cluster for clustered bamboo shoots, which comprises the following steps: step 1, in the dormancy period of the bamboo forest, completely cutting bamboos which are 3 years old or more in the bamboo cluster, and removing all old bamboo roots connected with the bamboos; 2, in the emergence period of the bamboo shoots, 8-12 robust bamboo shoots are evenly reserved and cultivated in each cluster; step 3, completely retaining two-year-old bamboo plants in the bamboo jungle as a nutrient supply source of one-year-old new bamboos, and promoting one cluster of bamboos to disintegrate into a plurality of asexual cloning fragments which are only formed by one-year-old bamboos and two-year-old bamboos and grow independently and are separated from one another; 4, 1-2 peripheral robust bamboo shoots are reserved and bred on each clone fragment year by year to serve as mother bamboos, two-year-old bamboo plants are completely reserved, and three-year-old bamboo plants are completely cut. According to the method, reasonable structure adjustment is conducted on the bamboo clusters, the problems that underground stems of the bamboo clusters are lifted year by year, and competition of nutrients, illumination and the like is intense are solved, the growth vigor of bamboos is improved, and high yield, high quality and sustainable development of the bamboo forest for clustered bamboo shoots are achieved.

Description

[0001] The present invention relates to the technical field of bamboo forest cultivation, and particularly to a method for regulating the clonal fragmentation of bamboo clusters in a clumping bamboo forest for shoot production. Background Art

[0002] Clumping bamboo forests for shoot production are widely distributed in southern China and are important economic bamboo forest types. Different from scattered bamboos, the rhizomes of clumping bamboos are sympodial, and the bamboos within the bamboo cluster are closely connected, transmitting nutrients and water to each other through the rhizomes.

[0003] Bamboos are mainly propagated asexually. Therefore, a clumping bamboo forest is actually composed of several relatively independent clonal populations. Each clonal population is in turn composed of several interconnected clonal individuals of different ages. There are obvious differences in physiological functions among individuals of different ages, especially in the growth vigor of lateral buds. Among them, the lateral buds of 1-2-year-old clonal individuals are vigorous and have stronger germination and growth potential, which are the key considerations for cultivation technical operations. However, with the growth of the bamboo forest, the bamboo cluster continuously expands, and the rhizomes gradually intertwine and rise year by year. This not only leads to intensified competition for nutrients and light within the bamboo cluster, affecting the growth quality of bamboo shoots and bamboos, but also causes the rhizomes of the bamboo cluster to rise, making the bamboo roots shallower, reducing the wind resistance of the bamboos, and making them prone to lodging.

[0004] At present, traditional bamboo forest management methods still cannot effectively solve problems such as unreasonable rhizome structure and intense nutrient competition in bamboo clusters, and it is difficult to meet the requirements of the modern bamboo shoot industry for high-yield and high-quality bamboo shoots. Therefore, it is of great practical significance to develop a regulation technology that can optimize the bamboo cluster structure and improve the growth vigor of the bamboo forest based on the characteristics of bamboo clonal fragmentation. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for regulating the clonal fragmentation of bamboo clusters in a clumping bamboo forest for shoot production. By reasonably adjusting the structure of the bamboo cluster, the present invention solves problems such as the annual rise of rhizomes in the bamboo cluster and intense competition for nutrients and light, improves the growth vigor of bamboos, and realizes the high-yield, high-quality and sustainable development of the clumping bamboo forest for shoot production.

[0006] The technical solution of the present invention: A method for regulating the clonal fragmentation of bamboo clusters in a clumping bamboo forest for shoot production, comprising the following steps:

[0007] Step 1: During the dormancy period of the bamboo forest, cut down all bamboos 3 years old and above in the bamboo cluster, and remove all old bamboo stumps connected to them;

[0008] Step 2: During the period when bamboo shoots emerge from the ground, evenly retain 8-12 strong bamboo shoots per cluster;

[0009] Step 3: retain all the two-year-old bamboo plants in the bamboo clump as a source of nutrients for the one-year-old new bamboo, so as to promote the disintegration of a bamboo clump into a number of mutually separated and independently growing asexual clone fragments consisting of only one-year-old and two-year-old bamboos;

[0010] Step 4: After that, each clone fragment retains 1-2 healthy bamboo shoots from the periphery as mother bamboos year by year, retains all 2-year-old bamboo plants, and cuts down all 3-year-old bamboo plants.

[0011] In the above-mentioned method for regulating clonal fragmentation of bamboo clumps in bamboo forests for bamboo shoots, in step 1, the whole felling operation is carried out during the winter dormancy period from December to February of the following year.

[0012] In the aforementioned method for regulating clonal fragmentation of bamboo clumps in bamboo forests for growing bamboo shoots, in step 1, the old bamboo baskets after full felling need to be completely removed to a depth of 30 cm below the ground surface.

[0013] In the aforementioned method for regulating clonal fragmentation of bamboo clumps in bamboo forests for growing bamboo shoots, in step 2, when retaining strong bamboo shoots at the periphery, bamboo shoots within a range of 20-50 cm from the edge of the bamboo clump are selected for retention.

[0014] The aforementioned cloning fragmentation regulation method for bamboo clumps in bamboo forests for growing bamboo shoots, wherein the robust bamboo shoots retained for cultivation need to meet the growth indicators of a diameter of ≥4 cm and a height of ≥50 cm.

[0015] In the aforementioned clonal fragmentation regulation method for bamboo clumps in bamboo forests for bamboo shoots, in step 4, organic fertilizer is applied to the bamboo forest 1-2 months before the sprouting of bamboo shoots in late spring each year, with an application rate of 1.5-2.5 tons per hectare.

[0016] In the aforementioned method for regulating clonal fragmentation of bamboo clumps in bamboo forests for growing bamboo shoots, the spacing between cloned fragments after the bamboo clumps are disintegrated is maintained at 1-3 meters to ensure the balance of light and nutrient distribution.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Optimize bamboo clump structure: By felling all old bamboos and removing old bamboo baskets, the underground interconnected structure of the bamboo clump is disintegrated, reducing the competition for nutrients and light within the bamboo clump, and providing a good growth space for new clone fragments.

[0019] 2. Solve the problem of underground stem lifting: avoid the problems of bamboo roots becoming shallower and wind resistance weakened due to the underground stems of bamboo clumps rising year by year, and enhance the stability and stress resistance of bamboo.

[0020] 3. Improve the growth vitality of bamboo: Retaining healthy bamboo shoots and two-year-old bamboos on the periphery can achieve nutrient complementarity between new and old bamboos, promote the healthy growth of bamboo, significantly improve the growth vitality of bamboo, and thus improve the yield and quality of bamboo shoots.

[0021] 4. Simple and easy to operate: The operation steps of the regulation method of the present invention are clear, without the need for complex equipment and technologies, facilitating popularization and application in vast bamboo growing areas, and having good economic and ecological benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram showing one clump of bamboo is presented.

[0023] Figure 2 A schematic diagram showing the clonal fragmentation of the bamboo clump is presented.

[0024] Figure 3 A schematic diagram showing the difference in bamboo shoot yield after regulation in Example 2 is presented.

[0025] Figure 4 A schematic diagram showing the difference in bamboo breast height after regulation in Example 2 is presented.

[0026] Figure 5 A schematic diagram showing the difference in bamboo height after regulation in Example 2 is presented. DETAILED DESCRIPTION OF THE INVENTION

[0027] The present invention will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present invention.

[0028] Example 1: A method for regulating the clonal fragmentation of a clump of bamboo in a clump bamboo shoot forest, comprising the following steps:

[0029] Step 1: Completely cut down bamboos over 3 years old and remove all old bamboo stumps connected thereto. The complete cutting operation is selected to be carried out during the winter dormancy period (December to February of the following year) every year. At this time, the physiological activities of bamboos are relatively weak, and the impact on the overall growth of the bamboo forest is relatively small. After complete cutting, the old bamboo stumps are promptly cleared. The old bamboo stumps need to be completely removed to a depth of 30 cm below the ground surface to avoid the old bamboo stumps occupying space and consuming nutrients, promoting the disintegration of the underground interconnected structure of the bamboo clump and creating conditions for the formation of new clonal fragments.

[0030] Step 2: Evenly retain 8 - 12 strong bamboo shoots on the periphery of each clump. During the emergence period of bamboo shoots, strong bamboo shoots within a range of 20 - 50 cm from the edge of the bamboo clump are selected for retention. The strong bamboo shoots need to meet the growth indicators of a diameter ≥ 4 cm and a height ≥ 50 cm to ensure the uniform distribution of the retained bamboo shoots. Let these bamboo shoots naturally grow into complete bamboo plants to form the backbone part of the new clonal fragment.

[0031] Step 3: Retain all 2-year-old bamboo plants in the bamboo clump as the nutrient supply source for the 1-year-old new bamboo, prompting one bamboo clump to disintegrate into several mutually separated and independently growing asexual clone fragments composed only of 1-year-old and 2-year-old bamboos. The spacing between the clone fragments is maintained at 1-3 meters to ensure the balance of light and nutrient distribution. 2-year-old bamboos have strong photosynthesis ability and nutrient accumulation ability, and can provide sufficient nutrient sources for the growth of 1-year-old new bamboos. By retaining 2-year-old bamboos, the nutrient complementarity between the new and old bamboos is realized, and the robust growth of 1-year-old bamboos is promoted.

[0032] Step 4: Each clone fragment after the disintegration of the bamboo clump retains 1-2 robust bamboo shoots on the periphery as mother bamboos year by year, retains all 2-year-old bamboo plants, and fells all 3-year-old bamboo plants.

[0033] Further, after the regulation of bamboo clump fragmentation is completed, organic fertilizer is applied to the bamboo forest. The fertilization amount is 1.5-2.5 tons per hectare, and the fertilization time is at the end of spring every year, 1-2 months before the bamboo shoots germinate. Organic fertilizer can provide long-term and comprehensive nutrients for the growth of clone fragments, improve the soil structure, increase the soil fertility, and promote the growth of bamboos.

[0034] Through the operations of the above steps, the competition for nutrients and light among these clone fragments is reduced, they grow independently, and the defect that the underground rhizomes of the bamboo clump are gradually raised year by year is avoided, significantly improving the growth vitality of the bamboos. Figure 1 shows a schematic diagram of one bamboo clump, Figure 2 shows a schematic diagram of bamboo clump fragmentation.

[0035] Example 2: Based on the method in Example 1, in this example, in a 50-acre moso bamboo clump shoot-use bamboo forest in Xiazhang Village, Shajian Town, Hua'an County, Fujian Province, the bamboo forest is treated during the winter dormancy period. Fell all bamboos over 3 years old and remove all the old bamboo stumps connected to them. During the bamboo shoot emergence period of the following year, observe each bamboo clump, select robust bamboo shoots within the range of 20-50 cm from the edge of the bamboo clump, and evenly retain 8 bamboo shoots per clump. At the same time, retain all 2-year-old bamboo plants. Before the bamboo shoots germinate in spring, apply organic fertilizer to the entire bamboo forest. The fertilization amount is 2 tons per hectare. After one year of growth, the bamboo clump successfully disintegrates into multiple mutually separated asexual clone fragments. Thereafter, each clone fragment retains 1-2 robust bamboo shoots on the periphery as mother bamboos year by year, retains all 2-year-old bamboo plants, and fells all 3-year-old bamboo plants. After 5 years of cultivation, the newly grown bamboos grow robustly, the bamboo shoot yield increases year by year, the breast diameter of the bamboos increases year by year, the height of the bamboos increases year by year, and the bamboo shoots have excellent quality, with a larger diameter and more tender flesh.

[0036] Example 3: Based on the method in Example 1, this example is operated in a 30-mu green-skinned bamboo forest for bamboo shoots in Fengtian Village, Gushui Town, Guangning County, Zhaoqing City, Guangdong Province, according to the same technical steps. In winter, all bamboos over 3 years old are cut down and old bamboo baskets are removed. The next year, 10 outer strong bamboo shoots are evenly retained in each clump, all 2-year-old bamboos are retained, and 1.5 tons of organic fertilizer are applied per hectare before the bamboo shoots sprout in spring. After the implementation of the control technology, the growth condition of the bamboo forest has improved significantly. The bamboo's wind resistance has been enhanced, and there was no bamboo lodging caused by strong winds that year. The yield of bamboo shoots increased by 15%, and the height and breast diameter of the new bamboo increased significantly, and the economic benefits were significantly improved.

[0037] In summary, the present invention solves the problems of the underground stems of bamboo clumps rising year by year, fierce competition for nutrients and light, etc. by making reasonable structural adjustments to the bamboo clumps, thereby improving the growth vitality of bamboo and achieving high-yield, high-quality and sustainable development of clumped bamboo forests for bamboo shoots.

Claims

1. A method for regulating the clonal fragmentation of bamboo clumps in a clumping bamboo forest for shoot production, characterized in that: It includes the following steps: Step 1: During the dormant period of the bamboo forest, cut down all the bamboo plants that are 3 years old or above in the bamboo clump, and remove all the old bamboo stumps connected to them; Step 2: During the period when bamboo shoots emerge from the ground, evenly retain 8 - 12 strong bamboo shoots per clump; Step 3: Retain all the 2-year-old bamboo plants in the bamboo clump as the nutrient supply source for the 1-year-old new bamboo, promoting the disintegration of one bamboo clump into several mutually separated and independently growing asexual clone fragments composed only of 1-year-old and 2-year-old bamboo; Step 4: Thereafter, each clone fragment annually retains 1 - 2 strong bamboo shoots on the periphery as mother bamboo, retains all the 2-year-old bamboo plants, and cuts down all the 3-year-old bamboo plants.

2. The method for regulating the clone fragmentation of bamboo clumps in a bamboo forest for multiple bamboo shoots according to claim 1, wherein: In Step 1, the cutting-down operation is selected to be carried out during the winter dormant period from December to February of the following year.

3. The method for regulating the clonal fragmentation of bamboo clusters in bamboo forests for multiple bamboo shoots according to claim 1, wherein: In Step 1, the old bamboo stumps after cutting down need to be completely removed to a depth of 30 cm below the ground surface.

4. The method for regulating the clonal fragmentation of bamboo clumps in a bamboo forest for growing clustered bamboo shoots according to claim 1, characterized in that: In Step 2, when retaining the strong bamboo shoots on the periphery, select the bamboo shoots within the range of 20 - 50 cm from the edge of the bamboo clump for retention.

5. The method for controlling cloning and fragmentation of bamboo clumps in bamboo forests for growing bamboo shoots according to claim 3, characterized in that: The retained strong bamboo shoots need to meet the growth indicators of diameter ≥ 4 cm and height ≥ 50 cm.

6. The clonal fragmentation regulation method of the bamboo clump for shoot production according to claim 1, characterized in that: In Step 4, 1 - 2 months before the emergence of bamboo shoots at the end of each spring, apply organic fertilizer to the bamboo forest, and the fertilization amount is 1.5 - 2.5 tons per hectare.

7. The method for regulating the cloning fragmentation of bamboo clumps in the bamboo forest for producing clustered bamboo shoots according to claim 1, characterized in that: The spacing between the clone fragments after the disintegration of the bamboo clump is maintained at 1 - 3 meters to ensure the balance of light and nutrient distribution.

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