iindaba

Igama elithi "organic" lithwala ulindelo olunzulu lwabathengi malunga nokutya okucocekileyo. Kodwa xa izixhobo zovavanyo lwaselabhoratri zivuliwe, ngaba loo mifuno ineelebhile eziluhlaza ngokwenene ayinakulunga njengoko ucinga? Ingxelo yamva nje yokujonga umgangatho welizwe lonke kwiimveliso zezolimo eziphilayo idiza ukuba phakathi kweebhetshi ezingama-326 zemifuno ephilayo ethathwe iisampulu, malunga ne-8.3% yafunyanwa inomkhondo.iintsalela zezitshabalalisi. Le datha, njengelitye eliphoswe echibini, ibangele i-ripples kwimarike yabathengi.

有机蔬菜

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.


Ixesha lokuposa: Mar-12-2025