Imvelo

Lesi sigaba sihlola izindleko zemvelo zezolimo zezilwane ezizolimo ezivame kakhulu ezifihliwe ngemuva kokupakisha okuhlanjululwe kanye nokusetshenziswa okujwayelekile. Lapha, sembula amasistimu okuwohloka kwezemvelo: Ukugawulwa kwamahlandla okukhulu kwamadlelo wedlelo kanye nokuphakelwa kwezilimo, ukungcola kwemifula kanye nenhlabathi enamandla amagesi anamandla njenge-methane ne-nitrous oxide. Le miphumela engahlukaniswanga noma ngengozi - yakhelwe emcabangweni wohlelo oluphatha izilwane njengemikhiqizo kanye neplanethi njengethuluzi.
Ukusuka ekubhujisweni kwezinto eziphilayo ekushiseni komkhathi, ukulima kwezimboni kuphakathi kwezinkinga zethu eziphuthumayo kakhulu zemvelo. Lesi sigaba sikhipha lezi zinto ezilimele ngokugxile ezindikingisweni ezintathu ezihlangene: ukulimala kwemvelo, okubeka isilinganiselo sokubhujiswa okubangelwa ukusetshenziswa komhlaba, ukungcoliswa komhlaba, kanye nokulahleka kwendawo yokuhlala; Imvelo yasolwandle, eveza umthelela omubi wokudonsela ngokweqile nokonakalisa kolwandle; kanye nokusimama kanye nezixazululo, eziveza indlela ekudleni okususelwa kwizitshalo, imikhuba yokuvuselela kabusha, noshintsho oluhle. Ngalezi le asens, siphonsela inselelo umbono wokuthi ukulimala kwemvelo kunezindleko ezidingekayo zentuthuko.
Indlela eya phambili ayigcini nje kuphela - isivele ivela. Ngokubona ukuxhumeka okujulile phakathi kwezinhlelo zethu zokudla, imvelo, kanye nemithwalo yemfanelo yokuziphatha, singaqala ukwakha ubuhlobo bethu nomuntu wemvelo. Lesi sigaba sikumema ukuthi uhlole zombili lezi zixazululo kanye nezixazululo, ukufakaza nokwenza okuthile. Ngokwenza kanjalo, siqinisekisa umbono wokusimama hhayi njengomhlatshelo, kepha njengokwelashwa; Hhayi njengomkhawulo, kepha njengenkululeko - yomhlaba, izilwane nangezizukulwane ezizayo.

Sawubona lapho, abathandi bezilwane nabangane abanolwazi! Namuhla, sizongena esihlokweni esingahle singabi mnandi kakhulu ukudingida, kepha munye obaluleke kakhulu: amapulazi efekthri. Le misebenzi enkulu ayisho nje ukukhiqiza ukudla ngezinga elikhulu - nabo badlala indima enkulu ekusakazeni izifo kanye nokulimala kwemvelo emvelweni. Ake sihlole uhlangothi olumnyama lokulima efektri nokuthi kungani kubalulekile ukubhekana nalezi zinkinga. Ukudluliselwa kwezifo emapulazini efektri kungenye yezinto ezikhathazayo ezinkulu namapulazi efektri yindlela abangaba ngayo izizathu zokuzalela izifo. Bheka lokhu: Izilwane zigcwele ngokuqinile ezikhaleni ezivalekile, okwenza kube lula kakhulu ngezifo ukusakazeka njengomlilo wasendle. Ukusondela kanye nezimo ezicindezelayo zenza buthaka amasosha abo omzimba, kubenza bathambekele kakhulu ekufeni. Lokhu, nakho, kwandisa ubungozi bokudluliselwa kwezifo phakathi kwezilwane epulazini. Yini ngisho ...

Ulwandle luhlanganisa ngaphezulu kwama-70% omhlaba futhi luyikhaya lokuhlekisa ngempilo yasemanzini. Eminyakeni yamuva nje, isidingo sokudla kwasolwandle siholele ekukhuphukeni kwamapulazi olwandle namapulazi ezinhlanzi njengendlela yokudoba okuqhubekayo. Lawa mapulazi, abizwa nangokuthi ama-aquaculture, ajwayele ukubonwa njengesixazululo sokudoba ngokweqile nendlela yokuhlangabezana nesidingo esikhulayo sokudla kwasolwandle. Kodwa-ke, ngaphansi kobuso kukhona iqiniso elimnyama lomthelela lawa mapulazi anawo endalini yemvelo yasemanzini. Ngenkathi zingabonakala njengesixazululo ebusweni, iqiniso ukuthi amapulazi olwandle nama-fish angaba nemiphumela emibi emvelweni nasezilwaneni ezibiza ulwandle ekhaya. Kulesi sihloko, sizokwehla ngokujulile emhlabeni wolwandle kanye nokulima izinhlanzi futhi siveze imiphumela efihliwe esisongela imvelo yethu engaphansi kwamanzi. Ukusuka ekusetshenzisweni kwama-antibiotic nama-pesticides ku ...

Eminyakeni yamuva nje, umqondo wezolimo amaselula, owaziwa nangokuthi inyama ekhule i-Lab-Gown, ithole ukunakwa okubalulekile njengesixazululo esingahle sibe yisixazululo sezinkinga zokudla zomhlaba wonke ezizayo. Le ndlela entsha ifaka ukukhulisa izicubu zezilwane ezilungiselelweni zelebhu, kuqeda isidingo sokulima izilwane zendabuko. Ngenkathi izinzuzo zezemvelo nezokuziphatha zezolimo zeselula zivunywa kabanzi, kuye kwaba nocwaningo olunomkhawulo emithonjeni engaba khona yezempilo yokudla inyama ekhule nge-lab. Njengoba lobu buchwepheshe buqhubeka buqhubekisela phambili futhi bathole ukusebenza kwezentengiso, kubalulekile ukuhlola nokuqonda imiphumela engaba khona yezempilo kubo bobabili abantu nezilwane. Kulesi sihloko, sizokwehla esimweni samanje sezolimo samaselula bese sixoxa ngemithelela engaba khona yezempilo okungenzeka ukuba nayo kubathengi nohlelo lokudla olukhulu. Njengoba ukufunwa kokukhiqizwa kokudla okuqhubekayo nokuziphatha okuhle kukhula, kubalulekile ukuhlola kahle zonke izici zezolimo zamaselula ukuqinisekisa ukuthi ...

Njengoba inani lomhlaba wonke liqhubeka nokwanda futhi isidingo sokudla sanda, imboni yezolimo ibhekene nengcindezi ekhuphuka ingcindezi yokuhlangabezana nalezi zidingo ngenkathi igqugquzela umthelela wayo wezemvelo. Indawo eyodwa yokukhathazeka ukukhiqizwa kwenyama, okuxhunyaniswe neminikelo ebalulekile ekuphumeni kwamagesi abamba ukushisa, ukugawulwa kwamahlathi, nokungcoliswa kwamanzi. Kodwa-ke, isixazululo esithembisayo esithola ukugcwala emphakathini wezolimo sizolimo sezolimo. Lo mkhuba wokulima, osuselwa ezimisweni zokusimama kanye nokulinganisela kwemvelo, ugxile ekwakheni inhlabathi enempilo nokubuyisela izinto eziphilayo. Ngokubeka phambili impilo yenhlabathi, ezolimo zokuvuselela amandla anamandla okuthuthukisa ikhwalithi yokudla ekhiqizwayo, kepha futhi anciphise imithelela emibi yemvelo yokukhiqizwa kwenyama. Kulesi sihloko, sizohlola umqondo wezolimo kabusha kanye namandla ayo okubhekana nezinselelo zezemvelo ezibangelwa ukukhiqizwa kwenyama. Sizokwelulela isayensi ngemuva kwale ndlela yokulima, izinzuzo zayo, ...

I-nitrogen iyinto ebalulekile yokuphila emhlabeni, idlala indima ebalulekile ekukhuleni nasekuthuthukisweni kwezitshalo nezilwane. Kodwa-ke, lapho amanani aphezulu we-nitrogen engena imvelo, angaba nemiphumela elimazayo kwimvelo yemvelo kanye nempilo yabantu. Omunye wabanikeli abaphambili kulolu daba ngumkhakha wezolimo, ngokuqondile ezolimo zezilwane. Ukukhiqizwa kanye nokuphathwa kwemfuyo, okubandakanya izinkomo, izinkukhu nezingulube, zixhunyaniswe namazinga abalulekile ekungcoleni kwe-nitrogen. Le nto yenzeka ikakhulukazi ngokusebenzisa umanyolo nomquba, ocebile eNitrogen, nasekukhuphukeni kwe-ammonia okukhiqizwa imfucuza yezilwane. Njengoba isidingo semikhiqizo yezilwane siyaqhubeka nokukhuphuka emhlabeni jikelele, ngakho-ke ukukhathazeka ngomthelela wezolimo zezilwane ekungcoleni kwe-nitrogen. Kulesi sihloko, sizohlola ukuxhumana phakathi kwezolimo zezilwane nokungcoliswa kwe-nitrogen, sihlolisise izimbangela, imiphumela, kanye nezixazululo ezingaba khona. Ngokuqonda lobu budlelwano obuyinkimbinkimbi, ...

Ukulima efektri, indlela ethuthukile nenqwaba yokukhulisa izilwane ukukhiqizwa kokudla, sekuyinto ebalulekile yemvelo. Inqubo yezilwane ezikhiqiza ngobuningi zokudla ayikhuphuki kuphela imibuzo yokuziphatha ngenhlalonhle yezilwane kodwa futhi inomthelela omubi emhlabeni. Nawa amaqiniso ayi-11 abalulekile mayelana namapulazi efektri kanye nemiphumela yawo yezemvelo: Amapulazi awo angu-1- abamba amanzi aphuma efektri angomunye wabahlinzeki abaholayo ekuphumeni kwamagesi abamba ukushisa abamba ukushisa, ekhulula amanani amakhulu we-methane ne-nitrous oxide emkhathini. Lawa magesi anamandla amakhulu kune-carbon dioxide endimeni yawo ekushiseni komhlaba, nge-methane eneminyaka engaba ngu-28 ephumelela kakhudlwana ekushiseni ukushisa kweminyaka engu-100, futhi i-nitrous oxide cishe ama-298 amahlandla angama-298. Umthombo oyinhloko wokukhishwa kwe-methane epulazini efektri uvela ezilwaneni ezihlubukayo, njengezinkomo, izimvu nezimbuzi, ezikhiqiza inqwaba ye-methane ngesikhathi sokugaya ...

Ukulima efektri, uhlelo oluthuthukile lokukhulisa imfuyo yokukhiqiza ukudla, kube yimikhosi yokushayela ngemuva kokudla komhlaba wonke. Kodwa-ke, ngaphansi kobuso bale mboni esebenza kahle kakhulu futhi enenzuzo kutholakala izindleko ezifihliwe nezibulalayo: Ukungcoliswa komoya. Ukukhishwa okuvela emapulazini asefekthri, kufaka phakathi i-ammonia, i-methane, udaba lokubandakanya, namanye amagesi amabi, kufaka ubungozi obukhulu bezempilo emiphakathini yasendaweni kanye nabantu abaningi. Le ndlela yokuwohloka kwemvelo ivame ukunganakwa, kepha imiphumela yezempilo ifinyelela kude, okuholela ezifweni zokuphefumula, izinkinga zenhliziyo, nezinye izimo zezempilo ezingamahlalakhona. Isilinganiso sokungcoliswa komoya ngamapulazi efektri efektri efektri anesibopho sengxenye enkulu yokungcoliswa komoya. Lezi zikhungo zihlala izinkulungwane zezilwane ezikhaleni ezivalekile, lapho imfucuza inqamula ngamanani amakhulu. Njengoba izilwane zichitha imfucuza, amakhemikhali namagesi akhishwe emoyeni amunwa zombili izilwane kanye nemvelo. Ivolumu enkulu ...

Ukulima efektri, indlela yezolimo ezinamandla zezilwane, sekuyisikhathi eside zihlotshaniswa nezinkinga eziningi zemvelo nokuziphatha okuhle, kodwa enye yezinto ezikhohlisayo futhi ezivame ukunganakwa ukungcoliswa okukhiqizayo emoyeni. Imisebenzi yezimboni evutha izimboni, lapho izilwane zigcinwa khona eziminyene, izimo ezingezinhle, zikhiqiza inqwaba yokungcola komoya okufaka isandla ekuwohlokeni kwemvelo, izinkinga zempilo yomphakathi kanye nokushintsha kwesimo sezulu. Lo mbhalo uhlola indlela ukulima kahle efektri ngqo ebhekene nokungcoliswa komoya kanye nemiphumela emide efinyelela kude empilweni yethu, imvelo kanye nenhlala-kahle yezilwane ezihilelekile. Ukungcola kwamapulazi efektri efektri, noma okuhlanganisiwe kokudla kwezilwane (ama-cafos), izinkulungwane zendlu zezilwane ezikhaleni ezivalekile lapho zikhiqiza khona imfucumfucu. Lezi zindawo zingumthombo obalulekile wokungcoliswa komoya, ekhulula amagesi ahlukahlukene ayingozi kanye nezinkinga ezingena emkhathini. Ukungcola okuvame kakhulu kufaka phakathi: Ammonia (NH3): ...

Ukulima efektri, owaziwa nangokuthi ukulima kwezimboni, kuwumkhuba wanamuhla wezolimo ohlanganisa ukukhiqizwa okujulile kwemfuyo, izinkukhu, kanye nezinhlanzi ezindaweni ezivaliwe. Le ndlela yokulima isiye yanda kakhulu emashumini eminyaka ambalwa edlule ngenxa yamandla ayo okukhiqiza inqwaba yemikhiqizo yezilwane ngentengo ephansi. Kodwa-ke, lokhu kusebenza kuza ngezindleko ezibalulekile kuzo zombili inhlala-kahle yezilwane kanye nemvelo. Umthelela wezolimo efektri ezilwaneni kanye neplanethi kuyinkinga eyinkimbinkimbi futhi ehlukahlukene evuse inkulumompikiswano egcwele kanye nempikiswano eminyakeni yamuva. Kulesi sihloko, sizokwelulwa ngezindlela ezahlukahlukene lapho ukulima efektri kuthinte khona zombili izilwane kanye nemvelo, kanye nemiphumela enakho empilweni yethu kanye nokusimama kweplanethi yethu. Ukusuka ekwelashweni okunonya nangobuntu kwezilwane emiphumeleni elimazayo emhlabeni, wamanzi nomoya, kubalulekile ku ...