CN103723833A - Construction method of heat-preservation ecological shallow trench for reinforcing reduction of farmland non-point source pollution in winter - Google Patents
Construction method of heat-preservation ecological shallow trench for reinforcing reduction of farmland non-point source pollution in winter Download PDFInfo
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Abstract
The invention discloses a construction method of a heat-preservation ecological shallow trench for strengthening winter reduction of farmland non-point source pollution. The construction method comprises the following steps: step 1: the ecological shallow trench is constructed by simulating a plate, and is divided into three layers from top to bottom in the longitudinal direction, wherein the upper soil layer is a plant planting area; the middle layer packing layer is a volcanic rock filling area; the lower cushion layer is a gravel filling area, each layer is separated by geotextile, and the ecological shallow trench is divided into 3 compartments by the partition plates along the length direction; step 2: performing heat preservation treatment on the ecological shallow trench: sticking thick foam heat-insulating materials around the shallow trench and on the outer surface of the bottom of the shallow trench; covering a white transparent agricultural film on the periphery of the shallow trench, wherein the agricultural film at the top is 1.2-1.8 m higher than the surface of the shallow trench, and the gap at the contact part of the agricultural film and the ground is compacted by a wood board; and uncovering the agricultural film to ventilate the shallow trench when the temperature is higher at noon every day, covering again after 3 pm, and circulating.
Description
Technical field
The present invention relates to a kind of construction process of shallow ridges, more specifically to a kind of construction process of strengthening the ecological shallow ridges of thermal-insulating type of cutting down farmland pollution of area source winter, belong to water pollution control technical field.
Background technology
Agriculture drainage ditch is carried out to the ecological shallow ridges after ecological reconstruction, it is the important element in rural area spatial texture and Environment-Ecosystem, except undertaking farmland irrigating draining task, also utilize the ecosystem of the formation such as inner soil, microorganism, animals and plants, reach the object of the pollution of area source of cutting down farmland drainage and rainfall formation.But, in the winter time under low temperature due to animals and plants dormancy, the reasons such as microbe population falls sharply, activity decreased, ecological shallow ridges is cut down pollution of area source successful and is reduced, make ecological shallow ridges operating performance in a year unstable, affect it in application and the popularization of cutting down pollution of area source field.Therefore the deficiency and the problem that need the construction process of researching and developing the ecological shallow ridges of a kind of novel heat insulation type to exist to solve current ecological shallow ridges.
Summary of the invention
The object of the invention is to solve the problems and shortcomings that prior art exists, a kind of construction process of strengthening the ecological shallow ridges of thermal-insulating type of cutting down farmland pollution of area source winter is provided, utilize the ecological shallow ridges that the present invention builds can there is in the winter time heat insulation function, strengthen the ecological shallow ridges Governance Ability to farmland pollution of area source in the winter time.
The present invention is achieved by the following technical solutions:
The construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening of the present invention winter, and it comprises the following steps:
Step 1: build ecological shallow ridges with sheet material simulation, be of a size of long 2.5m-3.5m, wide 0.5m-0.8m, high 0.7m-0.9m, is longitudinally divided into three layers, upper layer of soil layer from top to bottom, for plant growing district, thickness, between 150mm-250mm, is adjusted according to different planting plants; Middle filler layer, is volcanized rock fill area, and thickness is 250mm-350mm; Lower floor's bed course, is gravel fill area, and thickness is 100mm-200mm, between every layer of ecological shallow ridges, by geotextile, separate, ecological shallow ridges is divided into 3 compartments with dividing plate along its length, and each compartment length is 0.8m-1.2m, plants successively from left to right evergreen, Canna generalis Bailey and calamus;
Step 2: ecological shallow ridges is incubated to disposal: be pasted on ecological shallow ridges surrounding and bottom outer surface with the thick cellular insulant of 30mm-50mm; In ecological shallow ridges surrounding, with bamboo pole, set up support, the white transparent plastic sheeting for farm use of thickening on cover, top plastic sheeting for farm use exceeds shallow ridges surface 1.2m-1.8m, the gap plank compacting of plastic sheeting for farm use and contact position, ground; When noon every day, temperature was higher, open plastic sheeting for farm use ecological shallow ridges is taken a breath, after at 3 in afternoon, again cover, so circulation.
The construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening of the present invention winter, and its further technical scheme is that described sheet material is PVC sheet material, and described dividing plate is PVC dividing plate.
The construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening of the present invention winter, and its further technical scheme can also be that the particle diameter of described volcanized rock is 20mm-30mm.
The construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening of the present invention winter, and its further technical scheme can also be that described grain size of gravel is 20mm-40mm.
The construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening of the present invention winter, and its further technical scheme can also be that described temperature is 11:30-13:30 at noon when higher.
The construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening of the present invention winter, its further technical scheme can also be that 3 described compartments are established water sampling mouth at the bottom of its packing layer, have 3 water sampling mouths, while investigating Winter protection effect, the water sample balanced mix that three thief holes are gathered.
The construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening of the present invention winter, and its further technical scheme can also be that 3 the described each compartment of compartment upper right corner porous barriers are separated out a little space being convenient to root system of plant, soil and filler collection sampling.
Compared with prior art the present invention has following beneficial effect:
The ecological shallow ridges of thermal-insulating type of the present invention can make upper soll layer temperature remain on more than 10 ℃ in the winter time, (be called for short common ecological shallow ridges with uninsulated ecological shallow ridges, lower same) ratio, plant-growth is relatively active, root system is relatively flourishing, the microbe population at root system of plant place obviously increases, at the trial in section, the ecological shallow ridges of thermal-insulating type rises to 65%, 54%, 44% by 48%, 22%, 33% of common ecological shallow ridges respectively to the clearance of organism, total nitrogen, total phosphorus, and the total plate count concentration at root system of plant place is by 2265000 g
-1rise to 2573000 g
-1.Construction process of the present invention is simple and convenient simultaneously, and the material cost of using is lower, has the fine ability of applying.
Accompanying drawing explanation
Fig. 1-1st, the ecological shallow ridges cross-sectional view of the present invention.
In Fig. 1-1: 1-cellular insulant; 2-dividing plate; 3-water sampling mouth; 4-pedosphere; 5-packing layer; 6-bed course; The evergreen growing area of 7-; 8-Growth of Canna district; 9-calamus growing area; 10-discharge outlet;
Fig. 1-2 is the ecological shallow ridges two dimensional structure of the present invention schematic diagram.
In Fig. 1-2: 1-cellular insulant; 2-dividing plate; 3-water sampling mouth; 11-porous barrier;
Fig. 2 is that the ecological shallow ridges of the present invention and common ecological shallow ridges COD clearance change comparison diagram.
Fig. 3 is that the ecological shallow ridges of the present invention and common ecological shallow ridges TN clearance change comparison diagram.
Fig. 4 is that the ecological shallow ridges of the present invention and common ecological shallow ridges ammonia nitrogen removal frank change comparison diagram.
Fig. 5 is that the ecological shallow ridges of the present invention and common ecological shallow ridges TP clearance change comparison diagram.
Fig. 6 is the ecological shallow ridges of the present invention and common ecological shallow ridges different sites total plate count concentration comparison diagram.
Embodiment
Embodiment 1: the construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening winter, comprises the following steps:
Step 1: ecological shallow ridges is built in simulation take PVC sheet material as starting material, is of a size of long 3m, wide 0.6m, high 0.8m, is longitudinally divided into three floor: pedosphere from top to bottom: plant growing district, thickness is different according to different planting plants, between 150mm-250mm; Packing layer: fill (particle diameter 20mm-30mm) for volcanized rock, thickness is 300mm; Bed course: fill (particle diameter 20mm-40mm) for gravel, thickness is 150mm.For preventing mixing mutually, between every layer of ecological shallow ridges, by geotextile, separate.Ecological shallow ridges is divided into 3 compartments with PVC dividing plate along its length, and each compartment length is 1.0m, plants successively from left to right evergreen, Canna generalis Bailey and calamus.Under suitably illumination, pouring condition, cultivate 40 days, three plant growth are in good condition.
Step 2: under the period in winter, ecological shallow ridges is incubated to disposal: (1) is pasted on ecological shallow ridges surrounding and bottom outer surface with the thick cellular insulant of 40mm; (2) in ecological shallow ridges surrounding, with bamboo pole, set up support, the white transparent plastic sheeting for farm use of thickening on cover, top plastic sheeting for farm use exceeds shallow ridges surface 1.5m, the gap plank compacting of plastic sheeting for farm use and contact position, ground; (3) when every degree/day is higher, (12 noon) opened plastic sheeting for farm use ecological shallow ridges taken a breath, and again covers so circulation at 3 in afternoon.
Fig. 1 is that having of building strengthened the ecological shallow ridges (white transparent plastic sheeting for farm use does not draw) of cutting down farmland pollution of area source effect winter.At the bottom of the packing layer of each compartment, establish water sampling mouth, have 3 water sampling mouths, from left to right number consecutively 1#, 2#, 3#.While investigating Winter protection effect (not considering the impact of different plants), the water sample balanced mix that three thief holes are gathered.Each compartment upper right corner is separated out a little space with porous barrier, is convenient to the collection sampling of root system of plant, soil, filler etc.
Separately build an ecological shallow ridges identical with said apparatus, but be not incubated processing (being common ecological shallow ridges), with same method gather water sample as a comparison.
According to present method, be incubated the ecological shallow ridges of processing and there is good heat insulation effect.Table 1 has been done contrast by ecological to common ecological shallow ridges and thermal-insulating type shallow ridges top layer temperature in the winter time, and result shows, after insulation is processed, and the top layer temperature 10 ℃ of left and right that can raise.
Two kinds of ecological shallow ridges top layer temperature contrasts of table 1
Embodiment 2: strengthen the construction process of the ecological shallow ridges of thermal-insulating type of cutting down farmland pollution of area source winter as embodiment 1, the checking of farmland pollution of area source effect is cut down in the ecological shallow ridges strengthening of the thermal-insulating type of its structure winter, comprises the following steps:
Step 1: apply Pollutant levels in latter second day paddyfield water take base manure and, as foundation, configure the waste water of simulated farmland face source runoff, wherein organic mass volume ratio concentration (in chemical oxygen demand COD, lower same) is 139mgL
-1, the mass volume ratio concentration of total nitrogen (being denoted as TN, lower same) is 118mgL
-1, the mass volume ratio concentration of ammonia nitrogen is 9.2mgL
-1, the mass volume ratio concentration of total phosphorus (being denoted as TP, lower same) is 2.1mgL
-1.
Step 2: get simulated wastewater 0.30m
3disposable joining in ecological shallow ridges carried out static test, and in test, ecological shallow ridges does not add water, not draining.From three thief holes, respectively pick out a root rubber pipe, rubber hose is inserted to sampling jug bottom, every sampling in 72 hours once, by the water sample balanced mix of three sampling jugs, obtain altogether 6 batches of water samples, deposit in refrigerator.
Step 3: use the same method and obtain the water sample of common ecological shallow ridges, adopted potassium dichromate process to measure the COD concentration of water sample in 24 hours.
Fig. 2 has contrasted COD clearance situation over time in two kinds of ecological shallow ridges water outlets.The equal temporal evolution of clearance of COD in two kinds of ecological shallow ridges water outlets and growing steadily, and all higher at the clearance in early stage, main manifestations is first three batch (corresponding to 72h sample time, 144h, 216h).But the COD clearance of the ecological shallow ridges of thermal-insulating type is apparently higher than common ecological shallow ridges, in sample time, during 432h, thermal-insulating type and common ecological shallow ridges are about respectively 65% and 48% to the clearance of COD.
In the winter time, the temperature of common ecological shallow ridges is for a long time 0 ℃ of left and right, and plant is substantially in dormant state, and growth stops.The ecological shallow ridges of thermal-insulating type top layer temperature remains on more than 10 ℃, and plant-growth is relatively active, and branches and leaves are more in great numbers, root system is relatively flourishing, and the oxygen enrichment ability of pedosphere and upper strata filler is strengthened, and microbe population is increased, increased activity is therefore relatively strong to organic degradation capability.
Embodiment 3: strengthen the construction process of the ecological shallow ridges of thermal-insulating type of cutting down farmland pollution of area source winter as embodiment 1, the checking of farmland pollution of area source effect is cut down in the ecological shallow ridges strengthening of the thermal-insulating type of its structure winter, comprises the following steps:
Step 1: apply Pollutant levels in latter second day paddyfield water take base manure and, as foundation, configure the waste water of simulated farmland face source runoff, wherein the mass volume ratio concentration of COD is 139mgL
-1, the mass volume ratio concentration of TN is 118mgL
-1, the mass volume ratio concentration of ammonia nitrogen is 9.2mgL
-1, the mass volume ratio concentration of TP is 2.1mgL
-1.
Step 2: get simulated wastewater 0.30m
3disposable joining in ecological shallow ridges carried out static test, and in test, ecological shallow ridges does not add water, not draining.From three thief holes, respectively pick out a root rubber pipe, rubber hose is inserted to sampling jug bottom, every sampling in 72 hours once, by the water sample balanced mix of three sampling jugs, obtain altogether 6 batches of water samples, deposit in refrigerator.
Step 3: use the same method and obtain the water sample of common ecological shallow ridges, adopted the TN concentration of Waste Water by Alkaline Potassium Persulfate Digestion-UV Spectrophotometric Method in 24 hours.
In two kinds of ecological shallow ridges water outlets, TN clearance changing conditions is shown in Fig. 3.Article two, curve table reveals larger difference, and in the ecological shallow ridges water outlet of thermal-insulating type, TN clearance grows steadily in time, and when 432h, clearance is about 54%; In common ecological shallow ridges water outlet, TN clearance is lower, at the trial between section in occur fluctuation, when 432h, clearance is about 22%.
In ecological shallow ridges, nitrogen existence form is mainly by organic nitrogen (urea), ammonia nitrogen, nitric nitrogen, nitrite nitrogen, N
2the N of O and dissolving
2.The removal mechanism of nitrogen is comparatively complicated, main by volatilization, and the processes such as adsorption by soil, root system of plant absorption and microorganism is nitrated, denitrification are removed.
Temperature is that under the low temperature of 0 ℃ of left and right, plant-growth is stagnated substantially, and microbe population greatly reduces, and temperature is during lower than 12 ℃, and nitrifier is active obviously to decline, temperature is during lower than 0 ℃, the activity of denitrifying bacteria stops, and these factors all can have a negative impact to the removal of TN.The top layer temperature of the ecological shallow ridges of thermal-insulating type is substantially more than 12 ℃, and the receptivity of root system of plant and the efficiencies of nitrogen removal of microorganism all have larger change.
Embodiment 4: strengthen the construction process of the ecological shallow ridges of thermal-insulating type of cutting down farmland pollution of area source winter as embodiment 1, the checking of farmland pollution of area source effect is cut down in the ecological shallow ridges strengthening of the thermal-insulating type of its structure winter, comprises the following steps:
Step 1: apply Pollutant levels in latter second day paddyfield water take base manure and, as foundation, configure the waste water of simulated farmland face source runoff, wherein the mass volume ratio concentration of COD is 139mgL
-1, the mass volume ratio concentration of TN is 118mgL
-1, the mass volume ratio concentration of ammonia nitrogen is 9.2mgL
-1, the mass volume ratio concentration of TP is 2.1mgL
-1.
Step 2: get simulated wastewater 0.30m
3disposable joining in ecological shallow ridges carried out static test, and in test, ecological shallow ridges does not add water, not draining.From three thief holes, respectively pick out a root rubber pipe, rubber hose is inserted to sampling jug bottom, every sampling in 72 hours once, by the water sample balanced mix of three sampling jugs, obtain altogether 6 batches of water samples, deposit in refrigerator.
Step 3: use the same method and obtain the water sample of common ecological shallow ridges, adopted the ammonia nitrogen concentration of nessler reagent water by Spectrophotometry sample in 24 hours.
Fig. 4 has investigated two kinds of ecological shallow ridges ammonia nitrogen removal franks over time.In two kinds of ecological shallow ridges water outlets all there is larger fluctuation in section between at the trial in ammonia nitrogen removal frank, totally sees, the ammonia nitrogen removal successful of the ecological shallow ridges of thermal-insulating type is better than common ecological shallow ridges.
Removal mechanism and the TN of ammonia nitrogen are similar, main by volatilization, and adsorption by soil, root system of plant absorb and the process such as microorganism is nitrated, denitrification is removed, and therefore its removal effect is subject to the receptivity of root system of plant and the impact of microbic activity relation is very large.In certain that test, sample in period (as the 144h in Fig. 4,216h), there is decline phenomenon in ammonia nitrogen removal frank, relevant with the conversion process of organonitrogen, ammonia nitrogen is organonitrogen to the intermediate product in inorganic nitrogen conversion process,, there is the phenomenon that clearance declines in the of short duration accumulation of certain time ammonia nitrogen quantity therefore.
Embodiment 5: strengthen the construction process of the ecological shallow ridges of thermal-insulating type of cutting down farmland pollution of area source winter as embodiment 1, the checking of farmland pollution of area source effect is cut down in the ecological shallow ridges strengthening of the thermal-insulating type of its structure winter, comprises the following steps:
Step 1: apply Pollutant levels in latter second day paddyfield water take base manure and, as foundation, configure the waste water of simulated farmland face source runoff, wherein the mass volume ratio concentration of COD is 139mgL
-1, the mass volume ratio concentration of TN is 118mgL
-1, the mass volume ratio concentration of ammonia nitrogen is 9.2mgL
-1, the mass volume ratio concentration of TP is 2.1mgL
-1.
Step 2: get simulated wastewater 0.30m
3disposable joining in ecological shallow ridges carried out static test, and in test, ecological shallow ridges does not add water, not draining.From three thief holes, respectively pick out a root rubber pipe, rubber hose is inserted to sampling jug bottom, every sampling in 72 hours once, by the water sample balanced mix of three sampling jugs, obtain altogether 6 batches of water samples, deposit in refrigerator.
Step 3: use the same method and obtain the water sample of common ecological shallow ridges, adopted molybdenum-antimony anti-spectrophotometric method to measure the TP concentration of water sample in 24 hours.
In two kinds of ecological shallow ridges water outlets, TP clearance changing conditions is shown in Fig. 5.The equal temporal evolution of clearance of TP in two kinds of ecological shallow ridges water outlets and growing steadily, and all higher at the clearance in early stage, main manifestations is first three batch (corresponding to 72h sample time, 144h, 216h).The TP clearance of the ecological shallow ridges of thermal-insulating type is higher than common ecological shallow ridges, and in sample time, during 432h, thermal-insulating type and common ecological shallow ridges are about respectively 44% and 33% to the clearance of TP.
Phosphorus is mainly removed by processes such as adsorption by soil, root system of plant absorption and biological phosphate-eliminatings, and therefore its removal effect is relevant with the state of root system of plant and microorganism.The more common ecological shallow ridges of root system of the ecological shallow ridges of thermal-insulating type is more flourishing, stronger to the receptivity of phosphorus.What in microorganism, have phosphor-removing effect is polyP bacteria, under low temperature, the growth velocity of polyP bacteria is subject to certain inhibition, but comparatively speaking, low temperature is less than biological removal of nitrogen on the impact of biological phosphate-eliminating, research shows when the low temperature of 8 ℃-9 ℃, still to have comparatively stable phosphor-removing effect.Comprehensive above-mentioned two reasons, common ecological shallow ridges still has certain phosphor-removing effect.
Embodiment 6: strengthen the construction process of the ecological shallow ridges of thermal-insulating type of cutting down farmland pollution of area source winter as embodiment 1, total plate count in root system of plant, soil and the filler of common ecological shallow ridges and the ecological shallow ridges of thermal-insulating type is counted to mensuration, research characteristic of bacteria, comprises the following steps:
Step 1: sample collecting
The each about 80.00g of clip three kind of plant root system, mixes after being shredded with the scissors after sterilizing; Get three kinds of each about 80.00g of planting soil, after being ground with the mortar after sterilizing, mix; Get the about 100.00g of volcanized rock of packing layer, after being ground with the mortar after sterilizing, mix, stand-by.Each sampling spot position, in Table 2, is respectively got 3 batches to two kinds of ecological shallow ridges, interval 72h between each batch.
Step 2: collecting cells
Take the each root system of plant, soil and the each 10.00g of volcanized rock sample that collect, join respectively in the 100mL sterilized water with granulated glass sphere, on biological shaking table with 200rmin
-1speed oscillation 30min, obtain three kinds of bacteria suspensions.With aseptic pipettor, drawing respectively three kinds of bacteria suspension 1.0mL joins in 9.0mL sterilized water separately, obtain diluting the bacteria suspension of 10 times, from then on bacteria suspension is drawn respectively 1.0mL and is joined in 9.0mL sterilized water again, obtain diluting the bacteria suspension of 100 times, with same method, the rest may be inferred, obtains respectively diluting 10
3doubly, 10
4doubly, 10
5doubly, 10
6doubly, 10
7bacteria suspension doubly.
Step 3: microbial culture
The another aseptic pipettor of 1mL of using is from 10 of concentration minimum
7times bacteria suspension starts, get respectively successively 0.5mL bacteria suspension (culture dish is numbered in advance) in corresponding culture dish, then get heating and melting and be cooled to the substratum 15mL of 40 ℃-50 ℃ and be poured in the above-mentioned culture dish that fills bacteria suspension, rotate substratum and bacteria suspension are fully mixed gently, the cooling flat board of making, cultivates 72 hours.
Step 4: bacterial count
On the basis of visual inspection bacterial colony feature, use digital biomicroscope to observe the microbial morphology in culture dish.Adopt counter process to count bacterial colony number, the flat board after cultivating is placed on colony counter, with counting pen, click each bacterium colony, counter carries out accumulated counts to the bacterium colony clicking automatically.And calculate total plate count concentration.
Table 2 sampling spot position
Note: the degree of depth of each sampling spot in ecological shallow ridges: take each growing area soil surface in irrigation canals and ditches as reference surface.
In root system of plant, soil and the filler of thermal-insulating type and common ecological shallow ridges, total plate count concentration determination the results are shown in Figure 6.As seen from the figure: in common ecological shallow ridges, the total plate count concentration at root system of plant place is on a declining curve, in soil, slightly rise, relatively stable in packing layer; In the ecological shallow ridges of thermal-insulating type, root system of plant place total plate count concentration is in rising trend, in soil and all relatively stable in packing layer.In general, the total plate count concentration at the each position of the ecological shallow ridges of thermal-insulating type is all higher than common ecological shallow ridges, and wherein, the average total plate count concentration that root system of plant place is three batches is 2573000 g
-1, apparently higher than 2265000 g of common ecological shallow ridges
-1.
In common ecological shallow ridges, along with temperature reduces, plant-growth is stagnated gradually, improving activity of root system reduces, respiration weakens, and the bacterium at root system of plant place has lost gradually favourable growing environment and started decline, and soil and filler total plate count radix are little, in water sample, nutritive substance is not the restricted condition of bacterial growth, and total plate count is without larger variation.The ecological shallow ridges of thermal-insulating type, top layer temperature remains on more than 10 ℃, and plant-growth is continued, root system region activation recovering, in root system region, total plate count is bred, and quantity starts to increase.
In addition, in two kinds of ecological shallow ridges, in different sites, be root system of plant total plate count concentration maximum, at 1968000 g
-1-2653000 g
-1in scope, be secondly soil, total concentration is 118000 g
-1-173000 g
-1, packing layer is minimum, and total concentration is 17500 g
-1-25000 g
-1.Total plate count presents distribution like this, and reason and ecological shallow ridges build the initial stage, and in root system of plant, soil and filler, total plate count background concentration and phytomass are relevant.
Claims (7)
1. a construction process of strengthening the ecological shallow ridges of thermal-insulating type of cutting down farmland pollution of area source winter, is characterized in that comprising the following steps:
Step 1: build ecological shallow ridges with sheet material simulation, be of a size of long 2.5m-3.5m, wide 0.5m-0.8m, high 0.7m-0.9m, is longitudinally divided into three layers, upper layer of soil layer from top to bottom, for plant growing district, thickness, between 150mm-250mm, is adjusted according to different planting plants; Middle filler layer, is volcanized rock fill area, and thickness is 250mm-350mm; Lower floor's bed course, is gravel fill area, and thickness is 100mm-200mm, between every layer of ecological shallow ridges, by geotextile, separate, ecological shallow ridges is divided into 3 compartments with dividing plate along its length, and each compartment length is 0.8m-1.2m, plants successively from left to right evergreen, Canna generalis Bailey and calamus;
Step 2: ecological shallow ridges is incubated to disposal: be pasted on ecological shallow ridges surrounding and bottom outer surface with the thick cellular insulant of 30mm-50mm; In ecological shallow ridges surrounding, with bamboo pole, set up support, the white transparent plastic sheeting for farm use of thickening on cover, top plastic sheeting for farm use exceeds shallow ridges surface 1.2m-1.8m, the gap plank compacting of plastic sheeting for farm use and contact position, ground; When noon every day, temperature was higher, open plastic sheeting for farm use ecological shallow ridges is taken a breath, after at 3 in afternoon, again cover, so circulation.
2. the construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening according to claim 1 winter, it is characterized in that described sheet material is PVC sheet material, and described dividing plate is PVC dividing plate.
3. the construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening according to claim 1 winter, it is characterized in that the particle diameter of described volcanized rock is 20mm-30mm.
4. the construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening according to claim 1 winter, it is characterized in that described grain size of gravel is 20mm-40mm.
5. the construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening according to claim 1 winter, it is characterized in that when described temperature is higher be 11:30-13:30 at noon.
6. the construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening according to claim 1 winter, 3 compartments described in it is characterized in that are established water sampling mouth at the bottom of its packing layer, have 3 water sampling mouths, while investigating Winter protection effect, the water sample balanced mix that three thief holes are gathered.
7. the construction process of the ecological shallow ridges of thermal-insulating type of farmland pollution of area source is cut down in strengthening according to claim 1 winter, it is characterized in that 3 the described each compartment of compartment upper right corner porous barriers are separated out a little space being convenient to root system of plant, soil and filler collection sampling.
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