THE CONTENTS AND METHODS OF STUDYING3.1. The basis of reasoning3.1.1. The concept of vegetable safetya) safe vegetables?The fresh vegetable products (includes all vegetable tubers, stem, leaf, flower, fruit) have the same characteristics as the quality of it, the content of toxic chemicals and pollution levels harmful organisms below the standard, ensuring safety for consumers and the environment , shall be considered as vegetables to ensure food safety, known as RAT (decision No. 67-1998/QD-BNN-SCIENCE date 28/4/1998 of the Ministry of AGRICULTURE & RURAL DEVELOPMENT).According to the Research Institute of vegetables and HO CHI MINH CITY. In 1994, the RAT is the vegetables does not contain pesticide at a level that can cause any harmful effects for the health of humans and animals. Or in other words is the pesticide residues in vegetables do not exceed the "maximum residue level".b) the conditions of producing RATSoils: the high ground, the appropriate drainage with growth and development of the vegetable. Suitable for the production of vegetables for meat or mixed sandy soil is slight or ground meat an average cultivation floor thickness of 20-30 cm. vegetable growing region in quarantine areas with industrial waste, the hospital at least 2 km and the city waste at least 200 m. the land grow vegetables not have hazardous chemicals.Watering: need clean water to irrigate vegetables. If condition should use the water wells for the production of vegetables eaten raw as salads, vegetables, aromatic: vegetables, spices etc. Can be used in ponds or rivers, water pollution to water the vegetables. For fruit trees can use water pumped from ponds and ditches to irrigate the furrows in the early stages.
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