Corn stalks are good for returning waste to waste.

Now is the season of corn harvesting. Occasionally, the smog is filled, and the straw that is being burned in the farmland is being burned by the wind. Because the smoke is too strong, I can't see the opposite vehicles and pedestrians. I have to turn on the lights during the day. Straw burning has caused a lot of inconvenience to passing pedestrians, and safety accidents may occur at any time.

Straw returning to the field has been called for many years. It is a treasure for improving soil quality, increasing organic value and improving soil fertility. Farmers in many places have seen the tangible benefits brought by straw returning to them, but there are still many The peasants, who did not realize this, were spared for a while and burned. Practice has proved that burning straw is more harmful than profit, so it is necessary to remind farmers friends here.

First, when burning straw, a lot of smoke is generated, which affects road traffic and aviation safety. The visibility of air caused by smoke is reduced, and the visible range is reduced, which directly affects the normal operation of civil aviation, railways and highways, which is likely to cause traffic accidents and affect personal safety.

Secondly, burning straw directly causes air pollution and endangers human health. Straw when incinerated, the atmosphere of sulfur dioxide, nitrogen dioxide pollution index peaked, wherein the concentration of sulfur dioxide 1 times higher than usual, the concentration of nitrogen dioxide 3 times higher than usual. When the concentration of inhalable particles reaches a certain level, the part of the human eye, nose and throat that contains mucous membranes is more irritating, which may cause cough, chest tightness, and tearing, which may cause bronchitis in severe cases.

In addition, the way straw can destroy the soil structure, resulting in a decline in farmland quality. When the straw is incinerated, it generates a lot of heat. When it enters the ground, the microorganisms on the surface are burnt to death. The humus and organic matter are mineralized. The burning of straw in the field destroys the balance of the biological system, changes the physical properties of the soil, and aggravates the soil. The knots, which destroyed the ground force, exacerbated the drought and affected the growth of crops.

It can be said that in addition to saving trouble, the burning of straw is not a benefit, and how to return the straw to the field is a big way to deal with soil and air problems !

Stacking and returning to the field: Straw stacking and returning to the field is to make the crop straw into compost and manure, and apply it to the soil after decomposing. According to the water content, the fertilizer is returned to the field and the compost is returned to the field. When the straw is piled up, the composting mineralization accelerates, releasing nutrients, degrading harmful organic acids, polyphenols, etc., killing parasite eggs, pathogens and weed seeds, but the nitrogen is easy to be lost, and laborious, time-consuming, and less utilized. .

Returning the abdomen to the field: returning the abdomen to the field means that the straw is fed into the soil after the livestock is fed, and the economic and ecological benefits are obvious. Straw is an important source of ruminant livestock roughage. The nutrients absorbed by animals are converted into meat and milk, which improves economic benefits and achieves resource recycling. The ring is used, but the ratio is only 25% to 35% . There are differences in straw nutrients.

Turning back to the field: refers to the way in which the front stalks are ploughed into the soil before sown or transplanted after harvesting, and a large amount of straw can be treated in time to avoid rot and incineration. The key is to turn the straw into the soil and break it down. However, the amount of field is large, the decomposition of straw and the seedlings are easy to compete for nutrients, and the soil is loose after the straw is pressed back to the field, which affects the germination of the seeds, and the eggs and the bacteria cannot be killed, and it is not suitable for continuous cropping.

Covering the field: refers to the technology of covering the soil surface with more than 30% of the straw when planting crops , which can improve soil organic matter and regulate soil temperature and humidity. The method in two ways: First artificial mulching, i.e., a period of growth of crop (e.g., before sowing, wheat up - before jointing) covering the straw between the lines; second crop stubble residues interplanted cover, i.e. generally before harvest 15 ~ 20d will be planted in the row between the rows, when harvesting, leave 茬 0. 15 ~ 0. 20m , after emergence, planing 1 ~ 2 times, the roots spread on the surface.