CN103723833B - 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 strengthening the heat-preservation ecological shallow ridges of farmland non-point source pollution in winter, belong to technical field of water pollution treatment.
Background technology
Agriculture drainage ditch is carried out 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, the ecosystem also utilizing inner soil, microorganism, animals and plants etc. to be formed, reaches the object of the pollution of area source 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 reduces, 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 and cutting down application and the popularization in pollution of area source field.Therefore need the construction process researching and developing the ecological shallow ridges of a kind of novel heat insulation type to solve deficiency and the problem of current ecological shallow ridges existence.
Summary of the invention
The object of the invention is to solve prior art Problems existing with not enough, a kind of construction process strengthening the heat-preservation ecological shallow ridges of farmland non-point source pollution in winter is provided, the ecological shallow ridges utilizing the present invention to build can have heat insulation function in the winter time, strengthens ecological shallow ridges in the winter time to the Governance Ability of agricultural non-point pollution.
The present invention is achieved by the following technical solutions:
The construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter of the present invention, 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, adjusts according to different planting plants; Middle filler layer, be volcanized rock fill area, thickness is 250mm-350mm; Lower floor's bed course, be gravel fill area, thickness is 100mm-200mm, separate by geotextile between ecological shallow ridges every layer, ecological shallow ridges is divided into 3 compartments with dividing plate along its length, and each compartment length is 0.8m-1.2m, plants evergreen, Canna generalis Bailey and calamus from left to right successively;
Step 2: insulation is carried out to ecological shallow ridges and disposes: be pasted on ecological shallow ridges surrounding and bottom outer surface with the thick cellular insulant of 30mm-50mm; Set up support at ecological shallow ridges surrounding bamboo pole, cover thickeies white clear plastic sheeting for farm use, top plastic sheeting for farm use exceeds shallow ridges surface 1.2m-1.8m, the gap plank compacting at plastic sheeting for farm use and earth surface place; Open plastic sheeting for farm use when noon every day, temperature was higher to take a breath to ecological shallow ridges, again cover after at 3 in afternoon, so circulate.
The construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter of the present invention, its further technical scheme is described sheet material is PVC board, and described dividing plate is PVC dividing plate.
The construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter of the present invention, its further technical scheme can also be the particle diameter of described volcanized rock is 20mm-30mm.
The construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter of the present invention, its further technical scheme can also be described grain size of gravel is 20mm-40mm.
The construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter of the present invention, its further technical scheme can also be described temperature higher time be 11:30-13:30 at noon.
The construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter of the present invention, its further technical scheme can also be that 3 described compartments establish water sampling mouth at the bottom of its packing layer, have 3 water sampling mouths, when investigating Winter protection effect, by the water sample balanced mix that three thief holes gather.
The construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter of the present invention, its further technical scheme can also be that 3 described compartment each compartment upper right corner porous barriers are separated out the little space be convenient to root system of plant, soil and filler collection and sampled.
Compared with prior art the present invention has following beneficial effect:
Heat-preservation ecological shallow ridges of the present invention can make upper soll layer temperature remain on more than 10 DEG C in the winter time, (common ecological shallow ridges is called for short 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, heat-preservation ecological shallow ridges 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 used is lower, has and applies ability very well.
Accompanying drawing explanation
Fig. 1-1 is 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 present invention's ecological shallow ridges two dimensional structure 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 that the ecological shallow ridges of the present invention and common ecological shallow ridges different sites total plate count concentrations versus scheme.
Embodiment
Embodiment 1: the construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter, comprises the following steps:
Step 1: be that ecological shallow ridges is built in starting material simulation with PVC board, be of a size of long 3m, wide 0.6m, high 0.8m, be longitudinally divided into three floor from top to bottom: pedosphere: plant growing district, thickness is different according to different planting plants, between 150mm-250mm; Packing layer: for volcanized rock fills (particle diameter 20mm-30mm), thickness is 300mm; Bed course: for gravel fills (particle diameter 20mm-40mm), thickness is 150mm.For preventing mixing mutually, separate by geotextile between ecological shallow ridges every layer.Ecological shallow ridges is divided into 3 compartments with PVC dividing plate along its length, and each compartment length is 1.0m, plants evergreen, Canna generalis Bailey and calamus from left to right successively.Cultivate 40 days under suitable illumination, irrigation conditions, three plant growth are in good condition.
Step 2: under the period in winter, carries out insulation to ecological shallow ridges and disposes: (1) is pasted on ecological shallow ridges surrounding and bottom outer surface with the thick cellular insulant of 40mm; (2) set up support at ecological shallow ridges surrounding bamboo pole, cover thickeies white clear plastic sheeting for farm use, top plastic sheeting for farm use exceeds shallow ridges surface 1.5m, the gap plank compacting at plastic sheeting for farm use and earth surface place; (3) when every degree/day is higher, (12 noon) is opened plastic sheeting for farm use and is taken a breath to ecological shallow ridges, and at 3 in afternoon covers again, so circulates.
Fig. 1 is the ecological shallow ridges (white clear plastic sheeting for farm use does not draw) with strengthening farmland non-point source pollution in winter effect built.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#.During investigation Winter protection effect (not considering the impact of different plant), by the water sample balanced mix that three thief holes gather.Each compartment upper right corner porous barrier is separated out a little space, 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 do not carry out isothermal holding (i.e. common ecological shallow ridges), gather water sample as a comparison with same method.
The ecological shallow ridges carrying out isothermal holding according to present method has good heat insulation effect.Common ecological shallow ridges and heat-preservation ecological shallow ridges top layer temperature have in the winter time been done contrast by table 1, and result shows, and after isothermal holding, top layer temperature can raise about 10 DEG C.
The temperature contrast of two kinds, table 1 ecological shallow ridges top layer
Embodiment 2: the construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter is as embodiment 1, and the checking of the heat-preservation ecological shallow ridges strengthening farmland non-point source pollution in winter effect that it builds, comprises the following steps:
Step 1: apply Pollutant levels in latter second day paddyfield water with base manure and, for foundation, configure the waste water of source, simulated farmland face 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 carries out static test, in test ecological shallow ridges do not add water, not draining.Respectively pick out a root rubber pipe from three thief holes, rubber hose is inserted bottom sampling jug, every sampling in 72 hours once, by the water sample balanced mix of three sampling jugs, obtain 6 batches of water samples altogether, 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 compared for COD clearance situation over time in two kinds of ecological shallow ridges water outlets.In two kinds of ecological shallow ridges water outlets, the clearance of COD changes all in time and grows steadily, and all higher at the clearance in early stage, and main manifestations is first three batch (namely corresponding to 72h sample time, 144h, 216h).But the COD clearance of heat-preservation ecological shallow ridges is apparently higher than common ecological shallow ridges, when 432h sample time, thermal-insulating type and common ecological shallow ridges are about 65% and 48% respectively to the clearance of COD.
In the winter time, the temperature of common ecological shallow ridges is for a long time at about 0 DEG C, and plant is in dormant state substantially, and growth stops.Heat-preservation ecological shallow ridges top layer temperature remains on more than 10 DEG C, and plant-growth is relatively active, and branches and leaves are more in great numbers, root system is relatively flourishing, strengthens, microbe population is increased to the oxygen enrichment ability of pedosphere and upper strata filler, increased activity is therefore relatively strong to organic degradation capability.
Embodiment 3: the construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter is as embodiment 1, and the checking of the heat-preservation ecological shallow ridges strengthening farmland non-point source pollution in winter effect that it builds, comprises the following steps:
Step 1: with Pollutant levels in base manure applying latter second day paddyfield water for foundation, the waste water of configuration source, simulated farmland face 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 carries out static test, in test ecological shallow ridges do not add water, not draining.Respectively pick out a root rubber pipe from three thief holes, rubber hose is inserted bottom sampling jug, every sampling in 72 hours once, by the water sample balanced mix of three sampling jugs, obtain 6 batches of water samples altogether, 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 water outlet of heat-preservation ecological shallow ridges, TN clearance grows steadily in time, and when 432h, clearance is about 54%; In common ecological shallow ridges water outlet, TN clearance is lower, and occur fluctuation in section at the trial, when 432h, clearance is about 22%.
In ecological shallow ridges, nitrogen existence form is primarily of organic nitrogen (urea), ammonia nitrogen, nitric nitrogen, nitrite nitrogen, N
2the N of O and dissolving
2.The cutting mechanisms of nitrogen is comparatively complicated, and mainly through volatilization, the processes such as the absorption of adsorption by soil, root system of plant and microorganism is nitrated, denitrification are removed.
Temperature is that under the low temperature of about 0 DEG C, plant-growth is stagnated substantially, and microbe population greatly reduces, and temperature lower than 12 DEG C time, nitrifier is active obviously to decline, when temperature is lower than 0 DEG C, the activity ends of denitrifying bacteria, these factors all can have a negative impact to the removal of TN.The top layer temperature of heat-preservation ecological shallow ridges is substantially more than 12 DEG C, and the receptivity of root system of plant and the efficiencies of nitrogen removal of microorganism all have larger change.
Embodiment 4: the construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter is as embodiment 1, and the checking of the heat-preservation ecological shallow ridges strengthening farmland non-point source pollution in winter effect that it builds, comprises the following steps:
Step 1: with Pollutant levels in base manure applying latter second day paddyfield water for foundation, the waste water of configuration source, simulated farmland face 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 carries out static test, in test ecological shallow ridges do not add water, not draining.Respectively pick out a root rubber pipe from three thief holes, rubber hose is inserted bottom sampling jug, every sampling in 72 hours once, by the water sample balanced mix of three sampling jugs, obtain 6 batches of water samples altogether, deposit in refrigerator.
Step 3: use the same method and obtain the water sample of common ecological shallow ridges, adopted Berthelot spectrophotometry to measure the ammonia nitrogen concentration of water 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 ammonia nitrogen removal frank at the trial between all there is larger fluctuation in section, totally see, the ammonia nitrogen removal successful of heat-preservation ecological shallow ridges is better than common ecological shallow ridges.
Cutting mechanisms and the TN of ammonia nitrogen are similar, and mainly through volatilization, adsorption by soil, root system of plant absorb and the process such as microorganism is nitrated, denitrification is removed, and to be therefore subject to the impact of the receptivity of root system of plant and microbic activity relation very large for its removal effect.(as the 144h in Fig. 4 within certain sampling period of test, 216h), there is decline phenomenon in ammonia nitrogen removal frank, relevant with the conversion process of organonitrogen, ammonia nitrogen is that organonitrogen is to the intermediate product in inorganic nitrogen conversion process, therefore in the middle of, there is the phenomenon that clearance declines in the of short duration accumulation of certain time ammonia nitrogen quantity.
Embodiment 5: the construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter is as embodiment 1, and the checking of the heat-preservation ecological shallow ridges strengthening farmland non-point source pollution in winter effect that it builds, comprises the following steps:
Step 1: with Pollutant levels in base manure applying latter second day paddyfield water for foundation, the waste water of configuration source, simulated farmland face 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 carries out static test, in test ecological shallow ridges do not add water, not draining.Respectively pick out a root rubber pipe from three thief holes, rubber hose is inserted bottom sampling jug, every sampling in 72 hours once, by the water sample balanced mix of three sampling jugs, obtain 6 batches of water samples altogether, 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.In two kinds of ecological shallow ridges water outlets, the clearance of TP changes all in time and grows steadily, and all higher at the clearance in early stage, and main manifestations is first three batch (namely corresponding to 72h sample time, 144h, 216h).The TP clearance of heat-preservation ecological shallow ridges is higher than common ecological shallow ridges, and when 432h sample time, thermal-insulating type and common ecological shallow ridges are about 44% and 33% respectively to the clearance of TP.
Phosphorus is removed mainly through 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 heat-preservation ecological shallow ridges is more flourishing, stronger to the receptivity of phosphorus.What have phosphor-removing effect in microorganism is polyP bacteria, under low temperature, the growth velocity of polyP bacteria is subject to certain suppression, but comparatively speaking, the impact of low temperature on biological phosphate-eliminating is less than biological removal of nitrogen, research shows, still has comparatively stable phosphor-removing effect when the low temperature of 8 DEG C-9 DEG C.Comprehensively above-mentioned two reasons, common ecological shallow ridges still has certain phosphor-removing effect.
Embodiment 6: the construction process of the heat-preservation ecological shallow ridges of strengthening farmland non-point source pollution in winter is as embodiment 1, carry out counting to total plate count in the root system of plant of common ecological shallow ridges and heat-preservation ecological shallow ridges, soil and filler to measure, 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 each about 80.00g of three kinds of planting soils, mixing after being ground with the mortar after sterilizing; The volcanized rock getting packing layer is about 100.00g, and after being ground with the mortar after sterilizing, mixing, stand-by.Each sampling spot position, in table 2, respectively gets 3 batches to two kinds of ecological shallow ridges, interval 72h between each batch.
Step 2: collecting cells
Take each root system of plant, soil and each 10.00g of volcanized rock sample that collect, join in the 100mL sterilized water of band granulated glass sphere respectively, with 200rmin on biological shaking table
-1speed oscillation 30min, obtain three kinds of bacteria suspensions.Drawing three kinds of bacteria suspension 1.0mL respectively with sterile pipette joins in 9.0mL sterilized water separately, obtain the bacteria suspension of dilution 10 times, from then on bacteria suspension is drawn 1.0mL respectively and is joined in 9.0mL sterilized water again, obtain the bacteria suspension of dilution 100 times, in the same way, the rest may be inferred, obtains dilution 10 respectively
3doubly, 10
4doubly, 10
5doubly, 10
6doubly, 10
7bacteria suspension doubly.
Step 3: microbial culture
Another 1mL sterile pipette from concentration minimum 10
7times bacteria suspension starts, get 0.5mL bacteria suspension (culture dish is numbered in advance) in corresponding culture dish successively respectively, then heating and melting is got and the substratum 15mL being cooled to 40 DEG C-50 DEG C is poured into and above-mentionedly fills in the culture dish of bacteria suspension, rotating gently makes substratum and bacteria suspension fully mix, flat board is made in cooling, cultivates 72 hours.
Step 4: bacterial count
On the basis of visual inspection bacterial colony feature, digital biomicroscope is used to observe the microbial morphology in culture dish.Adopt counter process to count bacterial colony number, be placed on colony counter by the flat board after cultivating, click each bacterium colony with counting pen, counter carries out accumulated counts to the bacterium colony clicked 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: with each growing area soil surface in irrigation canals and ditches for reference surface.
In the root system of plant of thermal-insulating type and common ecological shallow ridges, soil and filler, 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, slightly rises in soil, relatively stable in packing layer; In heat-preservation ecological shallow ridges, 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 each position of heat-preservation ecological shallow ridges is all higher than common ecological shallow ridges, and wherein, the average bacteriological total number density at three batches, root system of plant place 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, the bacterium at root system of plant place lose favourable growing environment gradually and start decline, and soil and filler total plate count radix little, water sample Middle nutrition material is not the restricted condition of bacterial growth, and total plate count is without larger change.Heat-preservation ecological shallow ridges, top layer temperature remains on more than 10 DEG C, and plant-growth is continued, root area activation recovering, and in root area, 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 number density is 118000 g
-1-173000 g
-1, packing layer is minimum, and total number density is 17500 g
-1-25000 g
-1.Total plate count presents distribution like this, and reason and ecological shallow ridges build the initial stage, in root system of plant, soil and filler total plate count background concentration and phytomass relevant.
Claims (1)
1. strengthen a construction process for the heat-preservation ecological shallow ridges of farmland non-point source pollution in winter, it 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, adjusts according to different planting plants; Middle filler layer, be volcanized rock fill area, thickness is 250mm-350mm; Lower floor's bed course, be gravel fill area, thickness is 100mm-200mm, separate by geotextile between ecological shallow ridges every layer, ecological shallow ridges is divided into 3 compartments with dividing plate along its length, and each compartment length is 0.8m-1.2m, plants evergreen, Canna generalis Bailey and calamus from left to right successively;
Step 2: insulation is carried out to ecological shallow ridges and disposes: be pasted on ecological shallow ridges surrounding and bottom outer surface with the thick cellular insulant of 30mm-50mm; Set up support at ecological shallow ridges surrounding bamboo pole, cover thickeies white clear plastic sheeting for farm use, top plastic sheeting for farm use exceeds shallow ridges surface 1.2m-1.8m, the gap plank compacting at plastic sheeting for farm use and earth surface place; Open plastic sheeting for farm use when noon every day, temperature was higher to take a breath to ecological shallow ridges, again cover after at 3 in afternoon, so circulate;
The particle diameter of wherein said volcanized rock is 20mm-30mm; Described grain size of gravel is 20mm-40mm; 3 described compartments establish water sampling mouth at the bottom of its packing layer, have 3 water sampling mouths, when investigating Winter protection effect, by the water sample balanced mix that three thief holes gather; 3 described compartment each compartment upper right corner porous barriers are separated out the little space be convenient to root system of plant, soil and filler collection and sampled; Described sheet material is PVC board, and described dividing plate is PVC dividing plate; Be 11:30-13:30 at noon when described temperature is higher.
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