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1.重施有机肥有机肥不会导致蔬菜硝酸盐污染,使蔬菜耐贮存,品质好。有机肥应经高温堆沤腐熟,杀死病菌、虫卵后施用。沼气废渣液肥效高,经常施用,病虫少,可减少农药用量提高蔬菜产量。2.禁施硝态氮硝酸铵、硝酸钙、硝酸钾及含硝态氮的复合化肥容易使蔬菜积累硝酸盐,菜地不宜施用。碳酸氢铵、硫酸铵、酰铵态氮、尿素等应控制用量,并深施盖土。
1. Re-organic fertilizer organic fertilizer will not lead to nitrate pollution in vegetables, vegetables resistant to storage, good quality. Organic fertilizer should be high-temperature reactor 沤 composting, killing bacteria, eggs after the application. Biogas waste liquid fertilizer efficiency, frequent applications, fewer pests and diseases, reduce the amount of pesticides to increase vegetable production. 2. Forbidden nitrate nitrate ammonium nitrate, calcium nitrate, potassium nitrate and nitrate compound fertilizer easily make nitrate accumulation in vegetables, vegetable should not be applied. Ammonium bicarbonate, ammonium sulfate, ammonium nitrogen, urea, etc. should control the amount, and deep soil cover.