Ngakhale kuti metamine fumigants-sodium metam ndi potaziyamu metam-atsimikizira kuti ndi odalirika kwambiri poletsa udzu, matenda, ndi nematode m'minda ya mbatata kwa zaka zopitirira makumi anayi, zomwe zapezedwa posachedwapa zatsimikizira kuti pali ntchito zina zingapo pa mankhwalawa. kukulitsa luso.
Zatsopano zokhudzana ndi kayendedwe ka metames m'nthaka pambuyo pa ntchito ndizo "zatsopano". Ambiri amaganiza kuti kusuntha kwa zinthu mmwamba, pansi ndi m'mbali kudzakhala kofanana pamtunda wa mainchesi 6 mpaka 12. Lingaliro lina lofala linali lakuti mankhwalawo adzakhalabe m’nthaka, kupondereza tizirombo mosasamala kanthu za mmene nthaka ilili.
Mu 2017, wolemba nkhaniyi adayamba kudabwa zomwe zikuchitika m'nthaka pambuyo pa kugwiritsa ntchito metham, pamene akatswiri angapo a anyezi a Washington anayamba kudabwa ngati mankhwalawa akutaya mphamvu. Sanapeze zotsatira zomwe ankayembekezera. Wolemba nkhaniyi adagula miniRAE photoionization detector (PID) ataphunzira za teknoloji kuchokera kwa ofufuza m'mayunivesite akuluakulu ndipo anayamba maulendo opita kukayezetsa kukhalapo kwa metham pa kuya kwa nthaka kwa maola ndi masiku pambuyo pa ntchito.
Pambuyo pazaka zitatu zafukufuku, kusonkhanitsa zitsanzo za nthaka zoposa 40 zomwe zimatengedwa m'mikhalidwe yosiyanasiyana, tinapeza zosiyana zazikulu zisanu.
Timazitcha kuti Mizati Isanu ya kayendedwe ka methamu m'nthaka. Malingaliro atsopanowa ndi ofunikira pakukulitsa mphamvu ya metham fumigant m'nthaka.
Kusunga chinyezi
Sungani chinyezi cha 80% m'nthaka yonse kuyambira masiku 30 musanabzala komanso mukatha kuthira ngati n'kotheka. Nthaka yonyowa imathandizira kuyenda kwa metames, imathandizira kupuma kwa tizirombo, komanso imathandizira kusunga mankhwalawo. Chinyontho cha nthaka chikatsika kufika pa 50 peresenti chifukwa cha kutentha, mphepo, kapena kusuntha kwa nthaka kwadzaoneni, zowerengera zidzatha pakangotha maola, osati masiku. Ndi chidziwitso ichi, tsopano tikumvetsa kufunikira kofunikira konyowetsa.
Njira yoyika
Poyerekeza ndi zofukiza zina, mphamvu ya nthunzi ya zinthu za methamu ndi yochepa. Samangofalikira mpaka kapena mofanana monga momwe anthu omwe akhala akugwiritsa ntchito kwa zaka zambiri amaganizira. Yesani nthaka kuti mumvetse bwino komwe kuli tizilombo. Kenako ikani mankhwala anu a metam pafupi ndi tizirombo tomwe tikusaka ndi chemigation, kuvula kapena kuvula mozama.
Zida
Musapeputse kusintha kwakung'ono kwa zida zomwe mumagwiritsa ntchito pokonza nthaka, kuyikapo, ndi kugwirizanitsa ntchitoyo. N'zotheka kumasula nthaka pang'ono ngati simukuwumitsa ndikusiya mankhwala pamtunda kapena pafupi ndi nthaka.
Mpweya wowononga
Zogulitsa za Metam zimakhala zogwira mtima kwambiri ngati mbewu za udzu, matenda ndi nematode zikupuma komanso kuchita bwino musanagwiritse ntchito. Dothi louma kwambiri limakhudza kupuma kwa tizirombo. Ngati simungathe kuganiza kuti mbewu za udzu zimakula bwino pamalo enaake, ndiye kuti sizitero, ndipo zimakhala zovuta kuziletsa.
Dothi
Kusuntha kwazinthu kumatha kuchepetsedwa ndi dothi louma, lopindika kapena labuluu. Pewani kugwiritsa ntchito mankhwalawo pamalo oundana kwambiri. Chilichonse chomwe mungachite kuti nthaka isaume ndi yofunika kwambiri.
Zotsatira zathu zikuwonetsa kuti zinthu za Metam ndizothandiza monga kale. Palibe chomwe chasintha pakuchita bwino kwa mankhwalawo. Koma pamene kusintha kwapangidwa ku njira zogwiritsira ntchito, pogwiritsa ntchito mizati isanu monga chitsogozo, zowoneka bwino zimatheka. Iliyonse mwa mizati isanuyo ndi yofunika kwambiri, ndipo tsopano tili ndi deta yoyikira kumbuyo.