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危害原因;本市南郊红星公社引用凉水河污水灌溉小麦,连续两年发生小麦急性中毒事件,造成大面积减产。小麦受害主要是农药污水中的三氯乙醛,其次是活性氯危害的结果。三氯乙醛危害小麦的典型症状:麦苗矮化、滋生分蘖、叶片卷扭老化、茎基部变粗、次生根短粗、死苗等。危害小麦的临界浓度是1毫克/升,急性中毒的浓度为5-1.0毫克/升,安全浓度在0.5毫克/升左右。三氯乙醛灌溉水质标准,暂定为0.5毫克/升。
Hazard reasons; the southern suburbs of Hongxing commune cited Liangshui River sewage irrigation wheat, wheat acute poisoning for two consecutive years, resulting in large-scale production. The main victims of wheat are pesticide wastewater in the chloral, followed by the results of active chlorine hazards. Chloraldehyde harm the typical symptoms of wheat: wheat dwarf, breeding tillers, leaf curl aging, stem base thicker, secondary root stubby, dead seedlings and so on. The critical concentration of hazardous wheat is 1 mg / L, the acute poisoning concentration is 5-1.0 mg / L and the safe concentration is about 0.5 mg / L. Chloral hydrate irrigation water quality standards, tentatively 0.5 mg / liter.