除草剂的类型 1、灭生性的:对所有植物不加区别,全部杀死。如五氯酚钠、百草枯。 2.选样性的:对杂草有选择地杀灭,对作物的影响也不尽相同,如2,4-D。 3、内吸性的:这种除草剂可通过草的茎、叶或通过根部吸收,起到破坏内部结构、破坏生理平衡的作用,从而使植物死亡。由茎、叶吸收的如草甘膦,通过根部吸收的,如西马津。 4.触杀性的:除草剂只杀死直接接触的 Herbicide type 1, extinct: indiscriminate to all plants, all killed. Such as sodium pentachlorophenate, paraquat. 2. Selectable: Selective killing of weeds, the impact of crops are also different, such as 2,4-D. 3, systemic: This herbicide through the grass stems, leaves or through the roots to absorb, play a role in undermining the internal structure, destroy the physiological balance, so that plants die. Absorbed by the stems, leaves, such as glyphosate, absorbed through the roots, such as Si Ma Jin. 4. Contactable: Herbicide kills only direct contact