In agricultural production,chemical fertilizers play an irreplaceable role,but their excessive application is one of important reasons for worsening problem of agricultural non-point source pollution.A mechanized technology and equipment for layered fertiliza-tion in root zone of facility vegetables was studied and tested.Application of this technology and equipment can meet working conditions of greenhouse narrow spaces.Design of a Y-shaped rotary tiller could better break through soil,and depth of rotary tillage could reach more than 20 cm.At the same time,a layered fertilization mechanism could be designed to form a cylindrical fertilizer area in soil cul-tivation layer of 3 to18 cm,effectively reducing amount of fertilizer used in facility vegetable cultivation,avoiding impact of side fertil-ization and crop root fertilization on vegetable root growth,and ensuring continuous supply of fertilizer to plants nearby,improving fer-tilizer efficiency,and achieving goal of reducing application and increasing efficiency.This machine has been tested and demonstrated in cultivation of green radish,with a 54.3%improvement in spraying efficiency compared to traditional manual operations,a 37.8%re-duction in fertilizer usage,and a slight increase in green radish yield and nutrient content.
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