The positive effect of plastic mulch
①Increase the soil temperature-the effective accumulated temperature increases, the growth period is relatively prolonged, and the yield is increased (different colors have different warming effects, the colorless plastic film has the best warming effect, and the silver gray basically does not warm up)
② Maintain soil moisture (maintain moisture) and reduce the waste of water resources
③Maintain the soil structure (cover the surface with plastic film, protect the topsoil, and reduce the erosion of wind and water)
④Keep the soil loose (film mulching will reduce rainwater slapping and prevent soil compaction)
⑤Improve the light conditions (the mulch film and the water droplets under the film reflect sunlight)
⑥Prevent pests and diseases
⑦Improve soil fertility. After mulching, the loss of nitrogen fertilizer in the soil in volatile form is greatly reduced, so that nitrogen fertilizer can be maintained. As the ground temperature rises, microbial activity increases, increasing soil organic matter
⑧Improve crop quality, achieve early maturity and increase income
⑨ Drought and flood prevention
⑩Suppressing weeds (black mulching film works best)
The negative effects of plastic mulch
①Plastic film is difficult to degrade and remains in the soil causing pollution
② Although the mulching film has the effect of retaining water, it also prevents external precipitation from entering the ridge. If it encounters continuous rainfall, it will cause serious water damage, which will deteriorate the permeability of the soil and hinder the evaporation of water.
③Affect soil moisture infiltration, water content, and air permeability
④Hinder the movement of water and fertilizer
⑤Remaining film leads to soil compaction
⑥ It causes difficulties in the growth and development of crop roots and affects normal growth and development.
