GB/T 42812-2023General technical specification for improvement of soil with continuous cropping obstacles (English PDF)

3.1 Continuous cropping obstacle soil

Due to the ecological imbalance and deterioration of physical and chemical properties caused by the continuous planting of the same or closely related crops, continued planting of the crops often leads to aggravation of diseases and insect pests,

Soils with abnormal growth and development, reduced yield and poor product quality.

Note: It is divided into ecological imbalance type, physical and chemical property deterioration type and compound type. The main manifestation of ecological imbalance is that the ecological balance of soil microorganisms and animals is destroyed, and the ecological balance of soil microorganisms and animals is destroyed.

The soil-borne diseases and insect pests of crops are significantly aggravated; the deterioration of physical and chemical properties is mainly manifested in the deterioration of soil physical and chemical properties, abnormal growth and development of continuous cropping crops; complex Type is a mixture of the above two types.

3.2 Perishable biomass

Organic matter formed directly or indirectly through photosynthesis of green plants and perishable in the soil environment.

Note: Mainly includes agricultural and agricultural product processing residues, green manure, weeds, seaweed, cake fertilizer, livestock and poultry manure, leaves, twigs, sawdust, edible and feed agricultural products, etc.

3.3 Reductive soil disinfestation by solarization

In sunny and hot seasons, first spread perishable biomass into the soil, then cover the soil surface with a film when the soil is moist, and continue to expose it to the sun to improve cultivation.

It is a method to improve the continuous cropping barrier soil by increasing the soil temperature and forming an anaerobic reducing environment.

3.4 Reductive soil disinfestation by flooding

This is a method of improving continuous cropping barrier soil by first spreading perishable biomass into the soil and then continuing to flood it to form an anaerobic reducing environment.

3.5 Planned fallow

Arrange annual or seasonal fallow in a planned manner, during which deep plowing and plowing are carried out so that the soil in the cultivated layer can withstand low-temperature freezing and thawing, sun exposure, and rainwater erosion.