CN106836108A - A kind of southern sloping upland turf water channel spatial niche Optimal Configuration Method - Google Patents

Abstract

The invention relates to a method for optimizing the ecological niche configuration of the turf waterway space on the southern slope cultivated land, comprising the following steps: S1: demarcating the waterway area; S2: adjusting the surface slope and the size and shape of the constructed waterway; S3: selecting a waterway suitable for the local climate Forage species construct grass belts, increase planting density, and apply organic fertilizers as base fertilizers; S4: Determine the community construction plan: select herbaceous plant species and adjust the population distribution area according to the optimal configuration plan, and the grass belts must be planted in the same ditch. Uniform and continuous; S5: cover grass bags or non-woven fabrics after sowing and manage manually to prevent the invasion and human destruction of other plant species, control pests and diseases, and ensure the stability of the ecological buffer zone of the ditch; and S6: mow the grass belt.

Description

A method for optimal allocation of ecological niches for turf waterways on southern slope cultivated land

technical field

The invention relates to the field of farmland non-point source pollution control, in particular to a method for constructing a turf waterway by optimizing the spatial niche configuration of grass seeds to prevent and control agricultural non-point source pollution of cultivated land on a southern slope.

Background technique

Due to the unique natural conditions in the southern red soil hilly area, such as staggered mountains and hills, large terrain fluctuations, concentrated rainfall, heavy rainstorm intensity, strong weathering, high population density, and prominent human-land conflicts, etc., provide favorable conditions for the occurrence of water and soil erosion. condition.

According to statistics, ¹² % of the cultivated land in the southern red soil hilly area, about 33,000 km2, belongs to the sloping cultivated land reclaimed along the slope, which is very widely distributed. Due to the large slope of cultivated land, thin soil layer, and poor soil, farmers use excessive chemical fertilizers and pesticides in order to increase the yield of food crops. Under the influence of southern climate and rainfall conditions, soil erosion increases year by year, directly resulting in a large amount of nitrogen, phosphorus, and sediment. Into the water body, thereby causing serious agricultural non-point source pollution.

Faced with such a serious problem of farmland non-point source pollution, countries have also adopted corresponding prevention and control measures, mainly including pollution source control and runoff process control. Among them, the most important technologies related to the control of pollution sources are ecological agriculture and ecological fertilization, etc.; and the control of runoff process mainly includes the establishment of suitable artificial ponds, artificial wetlands and various types of vegetation buffer zones, etc., to intercept runoff and sediment the goal of.

Existing studies have shown that planting strips of vegetation between fields and on both sides of rivers can effectively intercept and retain sediment and reduce the load of pollutants such as nitrogen and phosphorus into the river, which is usually called a vegetation buffer zone. This is a low-cost and effective ecological engineering measure. Vegetation buffer technology has been applied in Europe since the 15th and 16th centuries, and was recommended by the United States as a best management practice in 1978.

According to the type of vegetation, the buffer zone can be divided into many types, including grassland buffer zone, shrub buffer zone, forest buffer zone and composite buffer zone composed of more than two types of vegetation. Grassland buffer strips are generally more than 3m wide and are most commonly used because of their ease of management and low investment costs, and they have the most significant effect on removing nitrogen, phosphorus pollutants and runoff sediment from farmland surfaces.

As a link between the farmland and the downstream receiving water body, the turf waterway is in the form of a turf-covered farmland drainage channel, so that the farmland wastewater such as storm runoff and irrigation runoff through the turf waterway can be absorbed by soil, absorbed by plants, and biodegraded. A series of functions can reduce the nitrogen, phosphorus, and sediment content entering the receiving water body. It is not only a safe drainage channel for slope farmland, but also can be used as an ecological buffer to prevent and control farmland non-point source pollution.

In order to maximize the effect of turf waterways on preventing and controlling farmland non-point source pollution, it is necessary to optimize the spatial niche allocation of plants in the buffer zone. The so-called ecological niche is the characteristic of a species, which refers to the sum of a species and its surrounding environment (including physical environment and biological relationship). It is precisely because of the differences in ecological niches of various species that many species can live in an ecosystem. Therefore, when constructing turf waterways, it is necessary to use the ecological niche theory, according to the layered layout of the aboveground and underground parts of different plant populations, and use multi-level spatial ecological niches to make rational use of limited light, air, heat, water, fertilizer and other resources. Avoid direct competition and crowding out of populations to establish a stable and efficient ecosystem.

Therefore, it is very necessary to develop an optimal allocation scheme for turf water channel space niche suitable for the prevention and control of non-point source pollution in cultivated land on southern slopes.

Contents of the invention

According to the characteristics of climate and rainfall, vegetation growth habits and farmland non-point source pollution characteristics of sloping cultivated land in red soil and hilly areas in the south, the present invention provides a method for optimally configuring the spatial ecological niche of turf waterways in sloping cultivated land in the south.

The technical solution adopted by the present invention: a method for optimizing the spatial niche configuration of turf waterways on southern slopes, including the following steps: S1: Delineate the waterway area, and select a land area that is at least 3 meters away from the outlet of the diversion waterway as a channel buffer zone S2: Adjust the surface slope and size and shape of the constructed waterway, that is, adjust the slope of the constructed waterway to less than 10°, adjust the cross-section of the water passage to a parabolic section, and the width of the cross-section of the water passage is 1- 2m, the horizontal length of the slope is greater than or equal to 4:1 to the vertical length, and the internal environment of the soil layer in the construction area will not be changed; S3: Select forage varieties suitable for the local climate to build a grass belt, increase the planting density, and apply Organic fertilizer is used as the base fertilizer; S4: Determine the community construction plan: select the herbaceous plant species and adjust the population distribution area according to the optimal configuration plan, and the grass strips must be uniform and continuous when planted in the same ditch; S5: After sowing, cover the grass bag or Non-woven fabrics and manual management to prevent the invasion of other plant species and man-made damage, control pests and diseases, and ensure the stability of the ecological buffer zone of the ditch; and S6: Mow grass belt.

The effect of this technical solution is: the method has low construction investment cost, simple method, strong operability, simple maintenance and operation, and will not affect the original farmland ecosystem; and does not change the ecological structure and function of the original farmland, It not only increases species diversity and surface coverage, but also efficiently intercepts farmland non-point source pollution, reducing the load of water and soil erosion on river pollution.

Further, in steps S1 and S2, when the adjusted channel slope is 1-5°, the land area extending 3-10 meters from the outlet of the water diversion channel is selected as the construction area of the channel buffer zone.

Further, in steps S3 and S4, in the construction area, Bahia grass and Bermudagrass that account for 30% of the total area of the entire waterway area are mixed at the waterway inlet, waterway, sides and slopes, and the seeding amount is : Bermudagrass 0.6g/m ² , bahia grass 8.7g/m ² ; mix tall fescue and white clover in the remaining 70% of the total area of the waterway area, the mixed sowing ratio is 3:1, and the sowing should be along non-parallel Mixed seeding in the direction of the waterway, uniform and continuous.

Further, in steps S1 and S2, when the adjusted channel slope is 5-10°, the land area extending 10-30 meters from the outlet of the water diversion channel is selected as the construction area of the channel buffer zone.

Further, in steps S3 and S4, in the construction area, Bahia grass and Bermudagrass that account for 30% of the total area of the entire waterway area are mixed at the waterway inlet, waterway, sides and slopes, and the seeding amount is : Bermudagrass 0.6g/m ² , Bahia grass 8.7g/m ² ; Bahia grass, tall fescue, bermudagrass and white clover are mixed in the remaining 70% of the total area of the waterway area, and the mixing ratio is 1: 1:1:1, when sowing, it should be mixed in a direction not parallel to the waterway, evenly and continuously.

Further, in steps S1 and S2, when the adjusted channel slope is 10-30°, the land area extending more than 30 meters from the outlet of the water diversion channel is selected as the construction area of the channel buffer zone.

Further, in steps S3 and S4, in the construction area, Bahia grass and Bermudagrass that account for 30% of the total area of the entire waterway area are mixed at the waterway inlet, waterway, sides and slopes, and the seeding amount is : Bermudagrass 0.6g/m ² , Bahia grass 8.7g/m ² ; Bahia grass, tall fescue, bermudagrass and white clover are mixed in the remaining 70% of the total area of the waterway area, and the mixing ratio is 1: 1:1:1, when sowing, it should be mixed in a direction not parallel to the waterway, evenly and continuously.

Further, in steps S1 and S2, when the slope of the channel cannot be adjusted to less than 10°, anti-scour dams are built at intervals of 3 or 5 meters in the water channel, and bahia grass is mixed on the anti-scour dams With Bermudagrass, sowing rate: Bermudagrass 0.6g/m ² , Bahia Grass 8.7g/m ² .

Description of drawings

Fig. 1 is a flow chart of a method for optimal configuration of ecological niches for turf waterways in southern slope cultivated land provided by the present invention.

Fig. 2 shows the top view of the ecological buffer zone of the turf waterway of the first kind of the present invention, wherein, a, bahia grass, b, bermudagrass, c, tall fescue, d, white clover.

Fig. 3 shows the top view of the second kind of turf waterway ecological buffer zone of the present invention, wherein, a, bahia grass, b, bermudagrass, c, tall fescue, d, white clover.

Fig. 4 is a side view of the turf waterway ecological buffer zone of the present invention, wherein θ is the angle between the slope of the waterway and the horizontal plane.

detailed description

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

Please refer to FIG. 1 , which is a flow chart of a method for optimizing the ecological niche configuration of a southern slope cultivated land turf waterway space provided by the first embodiment of the present invention, which mainly includes the following steps:

S11: Delineate the waterway area: select the land area 3-10 meters away from the outlet of the diversion waterway as the construction area of the channel buffer zone. The best location for the waterway area is a depression or a natural drainage ditch. If there is no natural drainage in the field Drainage ditches need to be excavated;

S12: Adjust the slope of the constructed waterway to 1-5°, adjust the cross-section of the water passage to be a parabolic cross-section, with a width range of 1-2m, and the slope should be 4:1 (horizontal length to vertical length) or more gentle, Please refer to Fig. 4, and do not change the internal environment of the soil layer in the construction area (the parabolic section of the waterway is convenient for mowing grass, and is also conducive to the passage of farm machinery);

S13: Choose forage varieties suitable for the local climate to build grass belts, increase planting density, and apply organic fertilizers as base fertilizers;

S14: Determine the community construction plan: select herbaceous plant species and adjust the population distribution area according to the optimal configuration plan, and the grass strips must be uniform and continuous when planted in the same ditch, specifically:

Please refer to Figure 2 at the same time. In the construction area, Bahia grass a and Bermudagrass b, which account for 30% of the total area of the water channel area, are mixed at the water inlet, water outlet, sides and slopes, and the sowing amount is: Bermudagrass 0.6g/m ² , bahiagrass 8.7g/m ² ; mixed perennial gramineous tall fescue c and perennial leguminous white-flowered clover d in the remaining 70% area of the waterway, the mixed sowing ratio is 3:1, and the sowing should be along the Mixed seeding parallel to the direction of the waterway, uniform and continuous;

S15: After sowing, cover with straw bags or non-woven fabrics and conduct manual management to prevent the invasion and man-made destruction of other plant species, control pests and diseases, and ensure the stability of the ecological buffer zone of the ditch;

S16: Mowing the grass belt not only brings certain economic benefits, but also avoids secondary pollution caused by the decomposition of plant residues.

The second embodiment of the present invention provides a method for optimizing the spatial ecological niche configuration of turf waterways on southern slope cultivated land, which mainly includes the following steps:

S21: Delineate the waterway area: select the land area 10-30 meters away from the outlet of the diversion waterway as the construction area of the channel buffer zone;

S22: Adjust the slope of the constructed waterway to 5-10°, adjust the cross-section of the water to be a parabolic cross-section, with a width range of 1-2m, and the side slope should be 4:1 (horizontal length to vertical length) or more gentle, Please refer to Figure 4, and do not change the internal environment of the soil layer in the construction area;

S23: Choose pasture varieties adapted to the local climate to build grass belts, increase planting density, and apply organic fertilizers as base fertilizers;

S24: Determine the community construction scheme: select herbaceous plant species and adjust the population distribution area according to the optimal configuration scheme, and the grass strips must be uniform and continuous when planted in the same ditch, specifically:

Please refer to Figure 3. In the construction area, the water inlet, water outlet, both sides and slopes are mixed with bahia grass a and bermudagrass b, which account for 30% of the total area of the waterway area, and the seeding rate is 0.6g bermudagrass /m ² , bahiagrass 8.7g/m ² ; in the remaining 70% area of the waterway, mix the perennial grasses bahiagrass a, bermudagrass b, tall fescue c and the perennial leguminous herb white clover d, the mixed sowing ratio 1:1:1:1, when sowing, it should be mixed in a direction that is not parallel to the waterway, evenly and continuously;

S30: Cover grass bags or non-woven fabrics and manage them manually during sowing to prevent the invasion and man-made destruction of other plant species, control pests and diseases, and ensure the stability of the ecological buffer zone of the ditch;

S26: Mowing the grass belt not only brings certain economic benefits, but also avoids secondary pollution caused by the decomposition of plant residues.

The third embodiment of the present invention provides a method for optimizing the spatial ecological niche configuration of turf waterways on southern slope cultivated land, which mainly includes the following steps:

S31: Delineate the waterway area: select the land area that is more than 30 meters away from the outlet of the diversion waterway as the construction area of the channel buffer zone;

S32: When the slope of the original land for constructing the waterway is 10-30°, and the adjusted slope is greater than 10°, the slope should be minimized as much as possible, and the cross-section of the water should be adjusted to a parabolic cross-section, with a width range of 1- 2m, the slope should be 4:1 (horizontal length to vertical length) or more gentle, please refer to Figure 4, but do not change the internal environment of the soil layer in the construction area;

S33: Choose forage varieties suitable for the local climate to build grass belts, increase planting density, and apply organic fertilizers as base fertilizers;

S34: Determine the community construction scheme: select herbaceous plant species and adjust the population distribution area according to the optimal configuration scheme, and the grass strips must be uniform and continuous when planted in the same ditch, specifically:

Please refer to Figure 3. In the construction area, the water inlet, water outlet, both sides and slopes are mixed with bahia grass a and bermudagrass b, which account for 30% of the total area of the waterway area, and the seeding rate is 0.6g bermudagrass /m ² , bahiagrass 8.7g/m ² ; in the remaining 70% area of the waterway, mix the perennial grasses bahiagrass a, bermudagrass b, tall fescue c and the perennial leguminous herb white clover d, the mixed sowing ratio 1:1:1:1, when sowing, it should be mixed in a direction that is not parallel to the waterway, evenly and continuously;

S35: Cover grass bags or non-woven fabrics and manage them manually to prevent the invasion and man-made destruction of other plant species, control pests and diseases, and ensure the stability of the ecological buffer zone of the ditch;

S36: Mowing the grass belt not only brings certain economic benefits, but also avoids secondary pollution caused by the decomposition of plant residues.

In step S32, when the slope of the original ditch land is 10-30° and the slope cannot be adjusted to below 10°, a cascaded earth valley square group (scour protection dam) is built every 3 or 5 meters in the water channel, and Mix bahiagrass a and bermudagrass b (sowing rate: 0.6g/m ² , 8.7g/m ² ) on the small valley to intercept the surface runoff of sloping farmland in sections and shorten the flow line on the slope , reduce runoff erosion on the slope, play a role in preserving soil fertility, protecting water and soil resources, sedimentation and flood detention.

In this way, the method for optimizing the ecological niche configuration of the turf waterway space on the southern slope cultivated land provided by the present invention is low in construction investment cost, simple in method, strong in operability, simple in maintenance and operation, and will not affect the original farmland ecosystem; and does not change the original With the ecological structure and functions of farmland, it not only increases species diversity and surface coverage, but also can efficiently prevent and control farmland non-point source pollution and reduce farmland water and soil erosion.

Based on the construction of grassland waterways, the present invention screens and determines the functional type of drought and waterlogging resistance, strong purification ability and good landscape effect from the local dominant plants in view of the influence of factors such as climate and rainfall characteristics, topography and landform, and soil physical and chemical properties in the region. Plants, specifically bahia grass, tall fescue, bermudagrass, white clover.

Bahia Grass a is a warm-season perennial Gramineae, clustered and erect herb, the upright part on the ground is 15-80cm high, and the root system is about 80-100cm long. In terms of vertical distribution, more than 50% of the roots are concentrated in the top soil layer 30cm . Bermudagrass b is a warm-season perennial Gramineae, rhizome-type, creeping herb, the upright part on the ground is 10-30cm high, and the root system is mainly distributed in the 0-15cm deep soil layer. Tall fescue c is a cool-season perennial Gramineae, clustered herb, the upright part on the ground is 50-120cm high, and the root system is mainly distributed in the 20-50cm deep soil layer. White-flowered clover d is a cool-season perennial leguminous, cluster-growing herb, the upright part on the ground is 10-30cm high, and the root system is mainly distributed in the 0-15cm deep soil layer.

At the same time, the present invention takes enhancing the effect of preventing and controlling non-point source pollution as the main purpose, taking into account the water and soil conservation ability, and optimizes the spatial ecological niches of various grass species.

Specifically, the present invention mixes the gramineous bahiagrass a and bermudagrass b at the water inlet, water outlet, both sides of the ditch, slope or Tugufang, the sowing rate is: bermudagrass 0.6g/m ² , 100 Pleasant grass 8.7g/m ² . From the perspective of ecological niche, the mixed sowing of bahiagrass a and bermudagrass b realized the optimal configuration of bio-ecological space, which is not only the combination of erect herbs and creeping herbs, but also the combination of deep-rooted herbs and shallow-rooted herbs. For the aboveground part of the turf, the waterway roughness coefficient is increased through the combination of erect herbs and creeping herbs, reducing the water flow velocity and enhancing soil erosion resistance; in the underground part, the soil shear resistance is enhanced through deep root anchorage and shallow root reinforcement, Increase soil cohesion; appropriate seeding rate can balance soil permeability and anti-slip ability even under heavy rainfall conditions.

In the present invention, the gramineous herbs Bahia grass a, Bermudagrass b, tall fescue c and the leguminous herb white flower clover d are mixed in the middle of the waterway, and the mixed sowing ratio is 1:1:1:1, that is, the mixed sowing ratio of the gramineous herb and the leguminous herb 3:1. The mixed sowing of grasses and legumes can improve the nitrogen nutrient balance of the grassland ecosystem through the nitrogen fixation of leguminous herbs, and give full play to the advantages of varieties. It is to increase green manure and fresh grass, root biomass, activate and accumulate soil nutrients, and accumulate soil Organic matter and effective measures to improve soil physical properties. Summarizing the mixed sowing ratio of leguminous and non-grass grasses at home and abroad, the best mixed sowing ratio of small-seeded grasses and leguminous herbs is 3:1, and the turf buffer zone under this ratio has a great impact on the nutrients such as nitrogen and phosphorus in farmland runoff and seepage water. And the removal effect of particulate matter is better. According to the principle of ecological niche, considering the niche differentiation of various grass species in horizontal space, vertical space and underground root system, the mixed sowing of grass species with different ecological niches is beneficial to improve the stability of turf ecosystem. The optimal configuration of the ecological niche of grass species in the horizontal/vertical space, such as the combination of clustered and erect herb bahia grass, clustered herb tall fescue, white flower clover with rhizome type and creeping herb bermudagrass, can make rational use of light , air, heat, water, fertilizer and other resources, increase the turf coverage of waterways, and establish a stable and efficient grassland ecosystem. The optimal allocation of underground root ecological niches, such as the combination of deep-rooted herbs Bahia grass and tall fescue and shallow-rooted herbs Bermudagrass, can enhance soil shear resistance and cohesion, and improve the erosion resistance of waterways.

According to the principles of landscape ecology, the mixed sowing of cool-season herbs tall fescue, white-flowered clover and warm-season herbs bahia grass and bermudagrass can make up for the lack of greenness in the dry season of plants by using their different growth periods, so as to avoid the lack of green in autumn and winter or winter. During the dry season, the turf turns yellow, which improves the ornamental value.

The present invention carries out mixed sowing along the direction not parallel to the waterway during sowing (the sowing method can be selected as drill sowing, broadcast sowing, or mechanical spray sowing according to the situation), uniform and continuous, and the straw bags or non-woven fabrics covered after sowing are built and developed on the turf. Protected initially as a good mulch.

The waterway turf of the present invention should be mowed several times per season to promote the regeneration of plants and control weeds, which not only brings certain economic benefits, but also avoids the secondary pollution of nitrogen and phosphorus caused by the decomposition of plant residues.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (8)

1. a kind of southern sloping upland turf water channel spatial niche Optimal Configuration Method, it is characterised in that comprise the following steps：

S1：Delimit water channel region, the land area of at least 3 meters of chosen distance diversion water channel outlet extension, as raceway groove buffer strip Structure region；

S2：The adjustment surface slope and size shape for building water channel, that is, adjust the gradient of the structure water channel to being less than 10 °, it is parabolic-shaped section to cross water adjustment of cross-section, and it is 1-2m to cross water cross section width range, and the horizontal length of side slope is than hanging down Straight length is more than or equal to 4:1, and do not change the soil layer internal environment in the structure region；

S3：The herbage variety that selection is adapted to local climate builds straw cord, increases planting density, and application of organic fertilizers is the bottom of used as Fertilizer；

S4：Determine community hight scheme：Herbaceous plant species and adjustment Species structure region are selected by configuration scheme, and The straw cord must be uniformly and continuous when being planted in same raceway groove；

S5：After planting cover straw bag or non-woven fabrics and carry out labor management, prevent the invasion and artificial destruction of other plant species, Disease and pest control, it is ensured that the stabilization of raceway groove ecology buffer strip；And

S6：Cradle straw cord.

2. south sloping upland turf water channel spatial niche Optimal Configuration Method as claimed in claim 1, it is characterised in that：Step In rapid S1 and S2, when be adjusted rear fall of channel for 1-5 ° when, then the land of 3-10 meters of chosen distance diversion water channel outlet extension Ground region as raceway groove buffer strip structure region.

3. south sloping upland turf water channel spatial niche Optimal Configuration Method as claimed in claim 2, it is characterised in that：Step In rapid S3 and S4, in the structure region, the whole water channel is accounted in water channel water inlet, delivery port, both sides and side slope mixed seeding The paspalum notatum and Bermuda grass of the region gross area 30%, application rate：Bermuda grass 0.6g/m², paspalum notatum 8.7g/m²；In remaining 70% institute State in the gross area region of water channel region mixed seeding Festuca Arundinacea and spend clover, Bromus inermis 3 in vain:1, should be along being not parallel to water during sowing Road direction carries out mixed seeding, uniform and continuous.

4. south sloping upland turf water channel spatial niche Optimal Configuration Method as claimed in claim 1, it is characterised in that：Step In rapid S1 and S2, when be adjusted rear fall of channel for 5-10 ° when, then 10-30 meters of chosen distance diversion water channel outlet extension Land area as raceway groove buffer strip structure region.

5. south sloping upland turf water channel spatial niche Optimal Configuration Method as claimed in claim 4, it is characterised in that：Step In rapid S3 and S4, in the structure region, the whole water channel is accounted in water channel water inlet, delivery port, both sides and side slope mixed seeding The paspalum notatum and Bermuda grass of the region gross area 30%, application rate：Bermuda grass 0.6g/m², paspalum notatum 8.7g/m²；In remaining 70% institute State in the gross area region of water channel region mixed seeding paspalum notatum, Festuca Arundinacea, Bermuda grass and to spend clover, Bromus inermis in vain be 1:1:1:1, Mixed seeding should be carried out along water channel direction is not parallel to during sowing, it is uniform and continuous.

6. south sloping upland turf water channel spatial niche Optimal Configuration Method as claimed in claim 1, it is characterised in that：Step In rapid S1 and S2, when be adjusted rear fall of channel for 10-30 ° when, then more than 30 meters of chosen distance diversion water channel outlet extension Land area as raceway groove buffer strip structure region.

7. south sloping upland turf water channel spatial niche Optimal Configuration Method as claimed in claim 6, it is characterised in that：Step In rapid S3 and S4, in the structure region, the whole water channel is accounted in water channel water inlet, delivery port, both sides and side slope mixed seeding The paspalum notatum and Bermuda grass of the region gross area 30%, application rate：Bermuda grass 0.6g/m², paspalum notatum 8.7g/m²；In remaining 70% institute State in the gross area region of water channel region mixed seeding paspalum notatum, Festuca Arundinacea, Bermuda grass and to spend clover, Bromus inermis in vain be 1:1:1:1, Mixed seeding should be carried out along water channel direction is not parallel to during sowing, it is uniform and continuous.

8. south sloping upland turf water channel spatial niche Optimal Configuration Method as claimed in claim 1, it is characterised in that： In step S1 and S2, fall of channel cannot be adjusted during to less than 10 °, then build erosion control at 3 or 5 meters of positions in water channel Dam, and mixed seeding paspalum notatum and Bermuda grass, application rate on the erosion-control dam：Bermuda grass 0.6g/m², paspalum notatum 8.7g/m²。