Gawo ziweto ulimi dziko

The ulimi padziko lonse, komanso kulima mbewu, ziweto pafupifupi konsekonse ofala. Pankhaniyi, meadows ndi msipu zatenga malo a dongosolo la dziko katatu lalikulu kuposa olimapo. Mbali yaikulu ya mankhwala nyama kupereka dziko ili zoni Nyengo. Choyamba madera ziweto lonse kutumikira zinthu kuwayika ziweto. The otsogolera anachita chitukuko cha Boma atatu a ziweto: ng'ombe kuswana, komanso nkhumba ndi nkhosa.

Pali kusiyana kwakukulu mu chitukuko cha ulimi nyama m'mayiko osauka ndi olemera. Mu maiko otukuka, voliyumu ya ulimi ziweto umalamulira ulimi ndi mtundu tima ya ulimi izo. Ambiri m'mayiko osauka, ziweto ndi makampani sekondale ndipo pokhala kwambiri. M'mayiko otukuka, bwino chakudya mafakitale ndi kusankha ziweto zinachititsa chakuti akwaniritsa pikhabuluka mwamphamvu ake. Chifukwa, ziweto akukumana mu mavuto ofanana, komanso ulimi - pali overproduction. Choncho, maboma a m'mayiko amenewa amakakamizidwa kutsata lamulo containment ndi kuchepetsa zokolola.

Ng'ombe (mu dziko mutu wake biliyoni 1.3) amapereka pafupifupi yopanga onse a mkaka ndi oposa theka la zokolola za nyama. Khalidwe mkaka kwambiri m'madera amene kuli anthu a North America ndi ku Ulaya, ali mu nkhalango steppe mabacteria wa woyendera nthambi kotentha. Ng'ombe ndi ng'ombe za mkaka ndi wamba osati m'madera amene pali tima ulimi, komanso m'madera ambiri louma kumene kuli anthu oti. Ng'ombe ng'ombe analandira chitukuko chachikulu m'madera louma la mabacteria subtropical ndi kotentha. zimayambitsa zoterozo za kufala kwa kumabungwe ena ziweto anatsimikiza osati ndi zinthu nyengo komanso ndi kukhalapo kwa chuma chakudya kupanga ziweto.

The Boma kwambiri wochitachita wa ziweto masiku ano ndi nkhumba. Mu dziko lero pali nkhumba kuposa 800 miliyoni. Kupita patsogolo chitukuko cha ulimi nkhumba zinachititsa chakuti mtengo wa nkhumba ndi zosakwana mtengo wa ng'ombe. Nkofunika kuti nkhumba n'zotheka osati m'madera ng'ombe ikudya chachitika, koma nthawi zambiri chaka chonse mu makola ndi kunja chakudya ndi adzasowa chakudya zinyansi. Komabe, odyetserako nkhumba pa malo okwanira dziko anayala pang'ono chifukwa chakuti pankhani zimenezi zambiri zopindulitsa kukhala makampani ziweto monga kuswana ng'ombe ndi nkhosa. Kuwonjezera nkhumba pafupifupi kwina dziko Muslim zifukwa zachipembedzo.

Kawirikawiri nkhumba uli pafupi ndi kumene anthu ndi kumadera intensively anayamba mbatata ndi mafakitale ena kukula mankhwala chakudya. Pafupifupi theka la chiwerengero cha nkhumba mu dziko imagwera pa ku Asia, makamaka China. kumabungwe ena a ziweto, makamaka nkhosa, komanso ndi ofala m'madera pali msipu kwambiri. Kumadera kumene nyengo louma, komanso pokhala ndi maholide a chipululu ndi msipu steppe zambiri kukhala bwino fleeced nkhosa. Kumadera kumene nyengo bata ndipo bwino aziwapatsa chinyezi chimapambana nkhosa mjasosherstnyh. padziko lonse lapansi malo a nkhosa - ndi theka chipululu ndi zigawo steppe la Australia.