In arid regions, the development of agriculture has a wide range of applications for mulching technology, because mulching has a significant effect on warming and water retention, and it also allows crops to increase yield and maturing. However, the technology of mulching film also has certain pollution problems, mainly because the materials are more difficult to degrade and the residual soil can cause soil pollution. In the field of corn planting in Daejeon, corn yield, soil fertility factor, hydrothermal status and nutrient status under plastic film were analyzed. Through analysis, it provides a reference for the application of plastic film cover technology in dry farming areas, with a view to increase corn production in dry areas, increase farmers' income, and promote the sustainable development of dry farming. Soil moisture changes under mulching can be measured using a soil moisture temperature measurement instrument.
During the spring maize growing season in the northern arid area, the soil temperature at the same depth and at the same depth at the same time in the plastic film-covered land was different. The bare soil level was the lowest and the ridge film type was the highest. The same depth at different times in 1d. The difference in soil temperature varies, from high to low at 14:00, 20:00, and 7:00. The surface soil moisture content of mulch film coverage was significantly higher than that of bare soil, and the ridge film cultivar was higher than that of the whole film. The reason was that ridge film cultivar cultivation techniques not only had strong conservation ability, but also had better ability to collect ineffective rainfall than the whole film. Coverage, while at the same time during the growth of corn, the difference between the harvest of corn and the end of the test after the corn's harvest decreased; with the increase of soil depth, the moisture content of the film-covered soil drastically decreased, and the soil moisture in the middle and lower layers was lower than the control.
After analyzing the soil water and heat through the soil moisture temperature quick-measuring device, it was found that the mulching has good water retention effect, and the mulching film mainly shows the increase of the surface soil water content, and the deep soil moisture appears to be depleted. This is mainly due to the The poor mulching of the mulching film affects the supplement of soil water by precipitation. During the corn growing period, the temperature of all soil layers in the mulching film was significantly higher than that of bare soil. It was also consistent with most research results. Especially in the winter, the temperature of film-covered soil was significantly higher than that of no-film coverage, and the daily variation was relatively small. It can be seen that the significant warming effect of mulching film is precondition, that is, it can only be fully expressed under the high solar radiation intensity, while under the condition of low temperature and short sunshine in winter, the mulching effect of mulching film is limited. There are also research results showing that the mulching film has a cooling effect in the hot season.
The leaves of corn are affected by factors such as light and hot water, and different treatment methods have great influence on these factors, and also have a direct impact on the growth of leaf area. Through the analysis of soil moisture temperature and temperature measuring instrument, the mulching film can accelerate the degradation of organic matter in the surface layer to a certain extent. The coverage of mulching film increases the content of soil organic matter and nutrients. The reasons for this need to be further analyzed and verified.
During the spring maize growing season in the northern arid area, the soil temperature at the same depth and at the same depth at the same time in the plastic film-covered land was different. The bare soil level was the lowest and the ridge film type was the highest. The same depth at different times in 1d. The difference in soil temperature varies, from high to low at 14:00, 20:00, and 7:00. The surface soil moisture content of mulch film coverage was significantly higher than that of bare soil, and the ridge film cultivar was higher than that of the whole film. The reason was that ridge film cultivar cultivation techniques not only had strong conservation ability, but also had better ability to collect ineffective rainfall than the whole film. Coverage, while at the same time during the growth of corn, the difference between the harvest of corn and the end of the test after the corn's harvest decreased; with the increase of soil depth, the moisture content of the film-covered soil drastically decreased, and the soil moisture in the middle and lower layers was lower than the control.
After analyzing the soil water and heat through the soil moisture temperature quick-measuring device, it was found that the mulching has good water retention effect, and the mulching film mainly shows the increase of the surface soil water content, and the deep soil moisture appears to be depleted. This is mainly due to the The poor mulching of the mulching film affects the supplement of soil water by precipitation. During the corn growing period, the temperature of all soil layers in the mulching film was significantly higher than that of bare soil. It was also consistent with most research results. Especially in the winter, the temperature of film-covered soil was significantly higher than that of no-film coverage, and the daily variation was relatively small. It can be seen that the significant warming effect of mulching film is precondition, that is, it can only be fully expressed under the high solar radiation intensity, while under the condition of low temperature and short sunshine in winter, the mulching effect of mulching film is limited. There are also research results showing that the mulching film has a cooling effect in the hot season.
The leaves of corn are affected by factors such as light and hot water, and different treatment methods have great influence on these factors, and also have a direct impact on the growth of leaf area. Through the analysis of soil moisture temperature and temperature measuring instrument, the mulching film can accelerate the degradation of organic matter in the surface layer to a certain extent. The coverage of mulching film increases the content of soil organic matter and nutrients. The reasons for this need to be further analyzed and verified.
- Hopper: used to store biomass pellets.
- Main body of vaporization chamber: biomass particle fuel gasification in gasification chamber
- Fire mouth (fire mouth): divided into inner tube and outer tube, the inner tube emits combustion gas.
- Grate: The middle position of the door of the vaporization chamber, used for air distribution when the particles are burned and vaporized.
- Ash door: The burner must open the door every 2-8 hours of work to clean the ash on the grate. When opening the door, be sure to stop the blower for more than 10 minutes and stand on the side of the door and keep it for more than 2 meters. The safe distance, after the blower stops running, open with a long iron. There is no flame and the combustible gas can be ejected before the door can be cleaned.
- Blower: Distribution of air for combustion and gasification.
- Wind box: used to adjust the air volume and air pressure.
- Bottom wind: From the bottom of the grate.
- Secondary air: Mezzanine distribution between the inner and outer tubes of the fire vent, and the secondary combustion of combustible gas in the combustion flaring.
- Feeding motor: screw rod used to drive feeding system.
- Feeding system: Feed biomass pellets into the combustion chamber.
- Casters: For short-distance movement of the burner (use a forklift away from the distance to avoid damage to the rigid vibrating refractory layer).
- Fuel: Pure woody biomass pellet fuel, diameter 8-10MM, length less than 30mm, heating value above 3500KCal, ash content less than 3% (large tonnage burner can burn 30MM biomass briquette fuel).
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