Buckwheat is sprouted with leaves, and emergence is difficult, and sowing should not be too deep. The depth of sowing directly affects the tidy emergence of the seedlings. It is the key to the whole seedling. Mastering the depth of sowing, one depends on the soil moisture, the water is sufficient, and the water deficiency is deep; the second is to see the planting season, the spring is deep, and the summer is slightly shallow; Third, we must look at the soil, sandy soil and dry land can be more suitable, but not more than 6 cm.
   Field management is an important part of the high yield of buckwheat. There are many tasks in field management. For the key technologies in buckwheat production, scientific management measures are adopted to ensure increased production and stable production.
   Guaranteed seedling
   When planting, the drought should be timely suppressed, broken large soil, solid soil, reduce the gap, so that the soil cultivation layer is virtual, densely inoculated, in order to facilitate the rise of water, the seed should be emerged.
Â Â Â èž wheat leaves are large, the ability to top the soil is poor, the ground panel knot affects the emergence of seedlings, and the farmer's è°šæ›° “èžèžä¸æ¶¸æ±¤(æ¿ç»“), take the cloth bagâ€. As long as it is not knotted, it is easy to seed. Therefore, it is necessary to pay attention to the removal of the surface knot, shallow sputum when the ground is slightly dry after the rain, so as not to damage the seedlings.
   Buckwheat is not wet, and excessive moisture is not good for alfalfa growth, especially at the seedling stage. Field drainage should be done before and after sowing of low-lying and steep buckwheat.
  Cultivating weeding
   The cultivating weeding is carried out after the first leaf is finished, and then depends on the area, soil, seedlings and weeds. Spring èž 2 - 3 times, Xia èž 1 - 2 times, cultivating depth of 3 - 5 cm. While cultivating the alfalfa, the vegetable seedlings and the seedlings are removed, the weak seedlings are removed, the seedlings are crowded, the uniformity of the buckwheat plants and the planting rate are improved, and the soil is cultivated. In general bud before flowering, plant height 20-- when 25 cm earth, promote root growth, reducing the lodging, root absorption capacity and improve drought tolerance.
   Irrigation watering
   Buckwheat is a crop that has weak drought resistance and requires more water. In the whole growth period, the water requirement for flowering and grouting is the highest. Spring buckwheat is grown in dry land and sloping land. It is rainy or uneven, and there is no irrigation condition. Fertility depends on natural rainfall, which has a great impact on buckwheat yield. For plots with conditional irrigation, it is necessary to pay attention to light pouring, and it is better to use irrigation and furrow irrigation.
   Auxiliary pollination
  Sweet medlar is a flowering pollination crop, which is also a two-type flower with a low seed setting rate. Under the same conditions, it is lower than the bitterness of self-pollination. A better way to increase the sweetness of sweet mash is to perform supplementary pollination. Auxiliary pollination is two kinds of bee-assisted pollination and artificial pollination. 1. Bee-assisted pollination: Sweet scent is an insect-borne flower crop, and dense bees and insects can enhance the sweet-scented pollination year. In the field of beekeeping, bee, one of buckwheat is not only to improve the productivity measures, but also conducive to the development of beekeeping career, the specific approach 2 before flowering - 1 day, every 2--3 acres install a bee box. 2. artificial pollination: condition where there is no bee, artificial pollination method is mainly buckwheat flowering every two or three days, at 9 - 11, with a 240--300 cm long, 30 cm wide Each of the two ends of the cloth is tied with a rope. Each of them holds one end and gently pulls along the top of the buckwheat to shake the plant.
Â
Geogrid is divided into plastic geogrid, steel-plastic geogrid, glass fiber geogrid and polyester warp knitting polyester geogrid four categories.
Plastic grille
The tensile direction of the polymer net, which has a square or rectangular shape, can be stretched in one direction and two - way.It is extruded through extruded polymer sheets (mostly polypropylene or hdpe), and then directional stretching under heating conditions.The unidirectional tensile grille is only drawn along the length of the plate.The bidirectional tensile grille continues to stretch the grid of unidirectional stretching in a direction perpendicular to its length.
Due to the rearrangement of polymer polymers in the manufacture of plastic geogrid, the bonding force between the molecular chains is strengthened and the purpose of enhancing the strength is achieved.Its elongation rate is only 10% ~ 15% of the original plate.If the anti-aging materials such as carbon black are added to the geotextile grille, it can have good resistance to acid, alkali resistance, corrosion resistance and aging resistance.
Steel plastic earthwork grille
Steel-plastic geogrid with high-strength steel wire (or other fiber), through special processing, with polyethylene (PE), and add other additives, by extrusion compound high strength resistance to stay with it, and we have rough surface embossing, is for the high strength reinforced belt.From this, the single belt is prepared or sandwiched by a certain spacing, and the welding technology of special strengthening adhesion is welded to the contact point, and it is a reinforced soil grate.
Product features:
Large strength and small deformation;
Creep decreases;
Corrosion resistance and long life: the steel plastic earthwork grille is made of plastic material as protective layer, with various auxiliaries to make it anti-aging, oxidizing property, acid, alkali, salt and other bad environment corrosion.Therefore, the steel and plastic earth grate can meet the requirements of all kinds of permanent works for more than 100 years, and the performance is excellent and the dimension stability is good.
Construction convenient and quick, short cycle, low cost, steel-plastic geogrid laying, easy lap, positioning, leveling, avoids overlapping cross, which can effectively shorten project cycle, engineering cost saving of 10% 50%.
The glass fiber
Glass fiber geogrids is fiber glass material, adoption of a certain mesh structure material made of weaving process, to protect the glass fiber, improve the overall performance, after the Shanghai juji process of special geotechnical composite material.Glass fiber is the main ingredient: silicon oxide, inorganic material, its physical and chemical performance is very stable, and has great strength, high modulus, high wear resistance and excellent cold resistance, no long-term creep;Good thermal stability;The reticular structure allows the aggregate to be interlocked and limited;To improve the bearing capacity of asphalt mixture.Because the surface coating has special modified asphalt, it has two heavy compound properties, which greatly improves the abrasion resistance and shear ability of geogrid grate.
Features of glass fiber earthwork grille:
High tensile strength and low elongation - fiberglass earthwork grille is made of fiberglass and has high resistance to deformation, and the fracture elongation is less than 3%.
No long-term creep - as reinforced material, has the long-term load ability to resist deformation under the condition of the creep resistance is extremely important, creep, glass fiber does not happen this ensures that the product can keep for a long time performance.
Thermal stability, fiber glass melting temperature above 1000 ℃, that ensures that the fiberglass geogrid under thermal stability in the paving operation.
The compatibility with asphalt, fiberglass geogrid in the post-treatment process of coating material for asphalt mixture design, each fiber were coated in full, the compatibility with asphalt has the very high, thus ensuring the fiberglass geogrid are produced in the asphalt layer with asphalt mixture segregation, but strong together.
Physical and chemical stability, after special treatment for coating processing, glass fiber geogrids can resist all kinds of physical abrasion, and chemical erosion, also can resist against erosion and climate change, to ensure its performance is not affected.
Aggregate interlock and limitation - because of the network structure of glass fiber earthwork grille, the aggregate of asphalt concrete can run through it, thus forming mechanical locking.Such restrictions hamper the aggregate movement, the asphalt mixture in the load to be able to achieve better compaction state, higher bearing capacity, better load transfer performance and small deformation.
Polyester fiber warp knitting
Noil product introduction
The warp knitting polyester geogrid is a kind of reinforced embankment of new geotechnical base material with high quality, adopt high-strength polyester fiber as raw material, and after the warp knitting direction detection rubberized coating by the special craft processing and become.
Noil product features
The warp knitted polyester grille has high tensile strength, small elongation, corrosion resistance, aging resistance, strong bite force, light weight and drainage.
Noil product use
Road, railway, municipal road and other road soft soil roadbed reinforced, can effectively improve the strength of roadbed, delay the reflection crack of road;2. Reinforcement and isolation of levees and watercourses in water conservancy projects, strengthen the foundation of soft soil, enhance its protective ability and improve the bearing capacity and stability of the foundation;3. Used for embankment slope reinforcement, retaining wall and reinforcement, enhancing the overall strength.
feature
High strength, small creep, suitable for all kinds of environmental soil, can satisfy the high grade highway high wall to use.
It can effectively improve the embedded lock, occlusion action of the reinforcement load, the bearing capacity of the foundation and the lateral displacement of the soil, and strengthen the stability of the foundation.
Compared with the traditional grille, it is more powerful, bearing capacity, anti-corrosion, anti-aging, large friction coefficient, uniform eye, convenient construction and long service life.
More adapted to the deep sea homework, embankment reinforcement, fundamentally solves the other materials do stone cage by long-term water erosion caused by the low strength, poor corrosion resistance and short service life and so on.
Can effectively avoid the construction damage caused by the crushing and damage during construction
It is applicable to the road base of various roads, railways and airports.
It is applicable to the large parking lot and terminal depot.
Suitable for railway and highway slope protection.
Applicable culvert enhancement.
It is suitable for the second enhancement of the soil slope after the reinforcement of the unidirectional stretching geogrid, and the soil slope is further enhanced to prevent soil erosion.
Reinforcement of mines and tunnels.
Application
Earthwork grille is suitable for all kinds of embankments and roadbed reinforcement, slope protection and wall reinforcement.The large airport, parking lot, wharf and other permanent bearing foundation reinforcement.
Earthwork grille is used to increase the bearing capacity of road base and prolong the service life of road base.
The earthwork grille is used to prevent the surface of the road from collapsing or causing cracks to keep the ground beautiful and orderly.
Earthwork grille is used for construction convenience, save time, save effort, shorten construction period, reduce maintenance cost.
Earthwork grille is used to prevent culvert from producing cracks.
Earthwork grille is used to enhance soil slope to prevent soil erosion.
Earthwork grille is used to reduce cushion thickness and save cost.
Earthwork grille is used to support the stability of the slope planting MATS
Geogrid
Steel Plastic Composite Geogrid,Steel Plastic Geogrids,Steel-Plastic Biaxial Geogrid,Plastic Pp Uniaxial Geogrid
ZHEJIANG BOYA COMTECH CO.,LTD , http://www.zjbytx.com