Te ahua o te mahi me te whanaketanga o te glyphosate

Ko te Glyphosate he momo patupatu phosphine pararopi me te tuāwhiorangi whakamomori. Ko te Glyphosate te nuinga o nga paanga ma te aukati i te koiora o te waikawa amino kakara, ara te biosynthesis o te phenylalanine, tryptophan me te tyrosine ma te ara waikawa shikimic. He mana aukati i runga i te 5-enolpyruvylshikimate-3-phosphate synthase (EPSP synthase), ka taea te whakakorikori i te huringa i waenga i te shikimate-3-phosphate me te 5-enolpyruvate phosphate ki te 5-enolpyruvylshikimate-3-phosphate (EPSP), na reira ka pokanoa te glyphosate. me tenei biosynthesis o nga tauhohenga enzymatic, ka puta te kohi waikawa shikimic i roto i te vivo. I tua atu, ka taea e te glyphosate te pehi i etahi atu momo whakaipoipo tipu me te mahi aa kararehe. He tino puhoi te paopaotanga o te glyphosate i roto i nga tipu teitei, a kua whakamatauria ko tana metabolite he waikawa aminomethylphosphonic me te waikawa amino acetic methyl. Na te kaha o te mahi, te paheketanga puhoi, me te nui o te paitini o te tipu o te glyphosate i roto i te tinana o nga tipu, ka kiia te glyphosate he momo tino pai ki te whakahaere i nga otaota otaota. me te painga pai o te taru, ina koa ki te waahi nui o te maara o nga hua transgenic glyphosate-tolerant, kua noho hei patu patupatua i te ao.

E ai ki te aromatawai PMRA, karekau he whakaraeraetanga o te glyphosate, he iti ake te tupono ki te mate pukupuku ki te tangata. Karekau he morearea ki te hauora o te tangata e tika ana na roto i nga aromatawai whakamaarama kai (kai me te wai) e pa ana ki te whakamahi glyphosate; Whaia nga tohutohu tapanga, kaore he take e maaharahara mo te momo mahi ma te whakamahi i te glyphosate, te tupono ranei ki nga kainoho. Karekau he morearea ki te taiao ina whakamahia i runga i te tapanga kua whakahouhia, engari me tuku he parepare rehu hei whakaiti i te tupono o te rehu ki nga momo karekau e arohia ana (nga otaota, ngaa haretare wai me nga ika kei te takiwa o te waahi tono).

E kiia ana ko te whakamahinga o te glyphosate i te ao ka 600,000 ~ 750,000 t i te tau 2020, me te 740,000 ~ 920,000 t i te tau 2025, e whakaatu ana i te piki tere.