A saline-alkali grassland management method based on ecological rotation and land sharing

Abstract

The present invention discloses a saline-alkali grassland management method based on ecological rotation and land sharing. The target plot is first divided into multiple grid areas. Soil samples are collected from different grid areas to determine the soil pH and total nitrogen content. Then, based on the measured soil pH and total nitrogen content, the area is divided into an ecological restoration area, a forage production area, and an economic plant area. Salicornia and Sesbania are planted in the ecological restoration area, alfalfa and Leymus chinensis are planted in the forage production area, and Isatis indigotica and Perilla are planted in the economic plant area. Crops are rotated in the three areas on a two-year cycle. The above design can reduce fertilization requirements and increase soil remediation speed through the complementarity of plant communities. It can achieve multi-subject land sharing grassland rotation management through the complementarity of ecological functions, effectively improve land use efficiency, take into account the "three lives" of grassland production, ecology, and life, and promote the sustainable development of saline-alkali grassland.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural ecological resource management, and more specifically to a management method for achieving sustainable utilization of saline-alkali grassland through plant community optimization and multi-agent collaborative rules. Background Art

[0002] Grasslands are one of my country's most important terrestrial ecosystems. Saline-alkali grasslands are primarily distributed in northern China, often within areas typically sensitive to climate change and ecologically fragile. Traditional saline-alkali grassland management methods are relatively simple, primarily relying on grazing or mowing, resulting in low resource utilization efficiency. Long-term, single-use land use can easily lead to land degradation, resulting in high costs and long-term ecological restoration, creating a vicious cycle. Summary of the Invention

[0003] In view of this, the present invention provides a saline-alkali grassland management method based on ecological rotation and land sharing, which realizes grassland rotation management of multi-subject land sharing through ecological function complementarity, can effectively improve land use efficiency, take into account the "three lives" functions of grassland production, ecology and life, and promote the sustainable development of saline-alkali grassland.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A saline-alkali grassland management method based on ecological rotation and land sharing includes the following steps:

[0006] Step 1: Divide the target plot into multiple grid areas, collect soil samples from different grid areas to measure soil pH and total nitrogen content;

[0007] Step 2: Divide the area into ecological restoration area, forage production area and economic plant area based on the measured soil pH and total nitrogen content;

[0008] Step 3: Plant Suaeda salsa and Sesbania sesbania in the ecological restoration area, plant alfalfa and Leymus chinensis in the forage production area, and plant Isatis indigotica and Perilla frutescens in the economic plant area;

[0009] Step 4: Rotate crops in the three areas on a two-year cycle.

[0010] Preferably, in step 1, the grid method is used for division, and 6m*6m is a grid area.

[0011] Preferably, the specific partitioning method in step 2 is:

[0012] pH ≥ 8.5 is the ecological restoration zone, and pH < 8.5 is the economic production zone; the economic production zones are then sorted from small to large based on soil total nitrogen, with the first 2 / 3 being forage production zones and the last 1 / 3 being economic plant zones.

[0013] Furthermore, when individual partitions are too dispersed, fine-tuning can be done with other adjacent partitions to facilitate operations.

[0014] Preferably, in step three, Suaeda salsa and Sesbania sesbania, alfalfa and Leymus chinensis, Radix Isatidis and Perilla frutescens are all planted in a strip intercropping form with a width ratio of 1:1, and the planting strip width of each plant is 1.2-1.5m.

[0015] Preferably, the specific rotation mechanism in step 4 is:

[0016] After two years, the ecological restoration area will rotate with the economic plant area, while the forage production area will remain unchanged;

[0017] After four years, the forage production area will rotate with the ecological restoration area, while the economic plant area will remain unchanged;

[0018] After six years, the ecological restoration area will rotate with the economic plant area, while the forage production area will remain unchanged;

[0019] After eight years, the forage production area will rotate with the ecological restoration area, while the economic plant area will remain unchanged;

[0020] After ten years, the ecological restoration area will rotate with the economic plant area, while the forage production area will remain unchanged;

[0021] Repeat this cycle.

[0022] It can be seen from the above technical solutions that, compared with the prior art, the present invention provides a saline-alkali grassland management method based on ecological rotation and land sharing, which has the following beneficial effects:

[0023] The technical solution of the present invention adopts a zoning rotation mechanism, wherein, in the ecological restoration area, salsa and sesbania are planted. On the one hand, the salt-alkali tolerant pioneer species salsa can improve the soil saline-alkali environment, and on the other hand, the green manure plant sesbania can fix nitrogen and improve soil fertility; in the forage production area, alfalfa and chinensis are planted. On the one hand, the nitrogen fixation function of alfalfa provides a source of nitrogen fertilizer for the production of chinensis, and on the other hand, the adaptability of chinensis is strong, which can ensure the normal growth and yield of forage; in the economic plant area, isatis root and perilla are planted. Isatis root can collect nectar during the flowering period and collect roots for medicinal use in the mature stage. Perilla can collect leaves during the growing period and collect seeds in the mature stage to bring economic income. The above design can reduce the demand for fertilization and improve the speed of soil remediation through the complementarity of plant communities. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the rotation cycle of the present invention;

[0026] Figure 2 This is the regional division diagram of Example 1;

[0027] Figure 3 This is a diagram showing the biomass and economic benefits after the implementation of Example 1;

[0028] Figure 4 This is a graph of soil total nitrogen content and soil pH after the implementation of Example 1. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] The method of the present invention is specifically:

[0031] 1. Grassland Zoning

[0032] In mid-to-late April, soil samples were collected from different grassland plots using a 6m*6m grid method to measure soil pH and total nitrogen content.

[0033] The ecological restoration zone is defined as pH ≥ 8.5, and the economic production zone is defined as pH < 8.5. The economic production zones are then sorted from small to large based on total soil nitrogen. The first 2 / 3 are forage production zones, and the last 1 / 3 are economic plant zones. When individual zones are too scattered, they can be fine-tuned with other adjacent zones to facilitate operations.

[0034] 2. Plant Function Combination

[0035] Planting Suaeda salsa and Sesbania sesbania in ecological restoration areas;

[0036] Planting alfalfa and sheepgrass in forage production areas;

[0037] Planting Isatis indigotica and Perilla in the economic plant area;

[0038] Suaeda salsa and Sesbania sesbania, alfalfa and Leymus chinensis, Isatis indigotica and Perilla frutescens were planted in strip intercropping with a width ratio of 1:1, and the planting strip width of each plant was 1.3m.

[0039] 3. Ecological Rotation Design

[0040] The "three-zone rotation" is carried out on a two-year cycle. The specific rotation mechanism is as follows:

[0041] After two years, the ecological restoration area will rotate with the economic plant area, while the forage production area will remain unchanged;

[0042] After four years, the forage production area will rotate with the ecological restoration area, while the economic plant area will remain unchanged;

[0043] After six years, the ecological restoration area will rotate with the economic plant area, while the forage production area will remain unchanged;

[0044] After eight years, the forage production area will rotate with the ecological restoration area, while the economic plant area will remain unchanged;

[0045] This cycle is carried out, see the attached Figure 1 shown.

[0046] 4. Implementation Effect Monitoring

[0047] Grassland yield, economic benefits, soil pH and total nitrogen content are measured every year to monitor the improvement of production functions and ecological restoration effects.

[0048] Example 1

[0049] The implementation was carried out in the saline-alkali grassland of Songyuan City, Jilin Province. The target plots were planned and zoned as follows: Figure 2 As shown, it is recorded as group A.

[0050] Comparative Example 1

[0051] The difference from Example 1 is that no regional division is performed, and alfalfa is directly planted in the target plot, which is recorded as Group B.

[0052] Comparative Example 2

[0053] The mice recovered naturally and were designated as group C.

[0054] Experimental example

[0055] The implementation results are as attached Figure 3-4 As shown, compared with alfalfa planting (B) and natural recovery (C), the total biomass of Example 1 (A) increased by 76.88% and 104.30% in the first year, 77.70% and 132.66% in the third year, and 90.97% and 183.87% in the fifth year, respectively. The economic benefits of Example 1 (A) increased by 92.91% and 143.33% in the first year, 129.81% and 274.36% in the third year, and 131.92% and 276.25% in the fifth year, respectively, compared with B and C.

[0056] After five years of implementation, the soil total nitrogen content of this method increased by 65.87% and 496.90% compared with B and C, and the soil pH decreased by 10.25% and 13.83%.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in this field, 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 will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A saline-alkali grassland management method based on ecological rotation and land sharing, characterized in that: The following steps are involved: Step 1: Divide the target plot into multiple grid areas, collect soil samples from different grid areas to measure soil pH and total nitrogen content; Step 2: Based on the measured soil pH and total nitrogen content, the area is divided into ecological restoration area, forage production area and economic plant area. The specific zoning method is as follows: pH ≥ 8.5 is designated as ecological restoration area, and pH < 8.5 is designated as economic production area. The economic production areas are then sorted from lowest to highest soil total nitrogen, with the top 2 / 3 designated as forage production area and the bottom 1 / 3 designated as economic plant area. Step 3: Plant Suaeda salsa and Sesbania sesbania in the ecological restoration area, plant alfalfa and Leymus chinensis in the forage production area, and plant Isatis indigotica and Perilla frutescens in the economic plant area; Step 4: Rotate crops in the three areas over a two-year cycle. The specific rotation mechanism is as follows: After two years, the ecological restoration area will rotate with the economic plant area, while the forage production area will remain unchanged; After four years, the forage production area will rotate with the ecological restoration area, while the economic plant area will remain unchanged; After six years, the ecological restoration area will rotate with the economic plant area, while the forage production area will remain unchanged; After eight years, the forage production area will rotate with the ecological restoration area, while the economic plant area will remain unchanged; After ten years, the ecological restoration area will rotate with the economic plant area, while the forage production area will remain unchanged; Repeat this cycle.

2. The saline-alkali grassland management method based on ecological rotation and land sharing according to claim 1, characterized in that: In step 1, the grid method is used for division, and 6m*6m is a grid area.

3. The saline-alkali grassland management method based on ecological rotation and land sharing according to claim 1, characterized in that: In step three, the planting of Suaeda salsa and Sesbania sesbania, the planting of alfalfa and Leymus chinensis, and the planting of Isatis indigotica and Perilla frutescens are all planted in a strip intercropping form with a width ratio of 1:1, and the planting strip width of each plant is 1.2-1.5m.

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