iindaba

I. I "Gray Zone" ye-Organic Standards

Ukuvula "iMithetho yokuPhunyezwa kweSiqinisekiso seMveliso yeMveliso," iSiqendu sesi-7 seSahluko sesi-2 sibonisa ngokucacileyo iindidi ezingama-59 zezityalo kunye nemvelaphi yezimbiwa ezivunyelwe ukusetyenziswa. I-Biopesticides ezifana ne-azadirachtin kunye ne-pyrethrins zibandakanyiwe ngokugqithiseleyo. Nangona ezi zinto zikhutshwe kwizityalo zendalo zichazwa "njengetyhefu ephantsi," ukutshiza okugqithisileyo kusenokukhokelela kwiintsalela. Eyona nto ixhalabisayo kukuba imigangatho yoqinisekiso ibeka ixesha lokucocwa komhlaba kwiinyanga ezingama-36, kodwa i-glyphosate metabolites esuka kwimijikelo yangaphambili yokufama isengafunyanwa kumanzi aphantsi komhlaba kwezinye iziseko ezikuMntla we-China Plain.

Amatyala eichlorpyrifosintsalela kwiingxelo zovavanyo isebenza njengesilumkiso. Isiseko esinye esiqinisekisiweyo, esimelene nefama yesiNtu, sichaphazeleke kungcoliseko lokubulala izitshabalalisi ngexesha leemvula, okukhokelele ekubhaqweni kwe-0.02 mg/kg yentsalela ye-organophosphorus kwiisampulu zesipinatshi. Oku "kungcoliseka okuzenzekelayo" kubhentsisa ukungonelanga kwenkqubo ekhoyo yoqinisekiso ekubekeni iliso okuguquguqukayo kwemekobume yokulima, kukrazula ukucoceka kolimo oluphilayo.

II. INyaniso Yatyhilwa KwiiLebhu

Xa usebenzisa i-gas chromatography-mass spectrometry, ochwephesha babeka umda wokufumanisa iisampuli kwinqanaba le-0.001 mg / kg. Idatha ibonisa ukuba i-90% yeesampulu ezilungileyo zazinamanqanaba entsalela kuphela i-1/50 ukuya kwi-1/100 yemifuno eqhelekileyo, elingana nokulahla amathontsi amabini e-inki kwidama lokudada eliqhelekileyo. Nangona kunjalo, ukuqhubela phambili kwitekhnoloji yokufumanisa yale mihla kwenze ukuba kubanjwe iimolekyuli kwinqanaba le-billion-in-a-billion, okwenza ukuba "intsalela eyiziro" ibe ngumsebenzi ongenakwenzeka.

Ukuntsokotha kwamatyathanga okungcoliseka okunqamlezayo kungaphaya kokucinga. Ungcoliseko lwesitora ngenxa yezithuthi zothutho ezingacocwanga ngokupheleleyo lubalelwa kuma-42% emilinganiselo yeziganeko, ngelixa ungcoliseko loqhagamshelwano olubangelwa kukubekwa kwezinto ezixubeneyo kwiishelufa zevenkile enkulu kubalelwa kuma-31%. Ngobuqhophololo ngakumbi, amayeza okubulala iintsholongwane axutywe kwezinye izixhobo ze-organic fertilizer ekugqibeleni angena kwiiseli zemifuno ngokusebenzisa i-bioaccumulation.

III. INdlela eQingqiweyo yoKwakha kwakhona iTrasti

Ukujongana nengxelo yovavanyo, umlimi ophilayo ubonise "inkqubo ecacileyo yokulandela umkhondo": Ikhowudi ye-QR kwiphakheji nganye ivumela ukubuza umlinganiselo womxube we-Bordeaux osetyenzisiweyo kunye neengxelo zokuvavanya umhlaba kwiikhilomitha ezintathu ezijikelezileyo. Le ndlela yokubeka iinkqubo zemveliso kwindawo evulekileyo ivuselela ukuzithemba kwabathengi.

Iingcali zokhuseleko lokutya zincoma ukuba zamkele "indlela yokucoca kathathu": ukucwiliswa emanzini e-baking soda ukubola i-fat-soluble pesticides, usebenzisa i-ultrasonic cleaner ukususa i-adsorbates yomhlaba, kunye ne-blanching imizuzwana emi-5 kwi-100 ° C ukuze ingasebenzi i-enzymes ye-biological. Ezi ndlela zinokuphelisa i-97.6% yeentsalela zomkhondo, okwenza umgca wokukhusela impilo ube namandla ngakumbi.

Idatha yovavanyo lwaselabhoratri akufuneki isebenze njengesigwebo esikhanyela ixabiso lezolimo eziphilayo. Xa sithelekisa i-0.008 mg / kg ye-chlorpyrifos eseleyo kunye ne-1.2 mg / kg efunyenwe kwi-celery eqhelekileyo, sinokubona ukusebenza okubalulekileyo kweenkqubo zokuvelisa izinto eziphilayo ekunciphiseni ukusetyenziswa kwe-pesticide. Mhlawumbi ubunyulu bokwenyani abukho ku-zero ngokupheleleyo, kodwa ekusondeleni ku-zero ngokuqhubekayo, nto leyo efuna abavelisi, abalawuli, kunye nabathengi ukuba baluke ngokudibeneyo uthungelwano oluluqilima lomgangatho.