Amaqanda enkukhu amhlophe, ansundu, aluhlaza: Uyini umehluko?

Sebenzisa isigaba seqanda sesitolo sokudla noma imakethe yabalimi, futhi uzobona amabhokisi amaqanda ahlukaniswe abe mhlophe futhi ansundu, kwesinye isikhathi amaqanda aluhlaza noma aluhlaza okwesibhakabhaka. Kepha lapho sebefikile epuletini, mhlawumbe, noma babhakwe ikhekhe, kunzima ukutshela umehluko. Eqinisweni, umehluko muni phakathi kwamaqanda ngamagobolondo wemibala ehlukene?

Lokhu akuyona ufulawa noma isimo selayisi. Amaqanda ansundu awawenzi "ngokwemvelo," futhi amaqanda amhlophe nawo awanciphiwe nge-bleach. Zombili lezi zinhlobonhlobo zenzeka ngokwemvelo ngokwemvelo, njengoba kwenza amaqanda enkukhu aluhlaza okwesibhakabhaka. Kepha empeleni, wonke amaqanda enkukhu ayafana ngaphakathi. Ngakho-ke yini ebangela imibala yeqanda ehlukile phakathi kohlobo olufanayo lwenyoni?

UDkt. Justin Fowler, uprofesa eMnyangweni Wesayensi Yezinkukhu yase-University of Georgia, ukhanya ukukhanya ezintweni. "Imibala ehlukene, noma ukuba khona kwamabala noma ukuceba, yehlela ezakhiweni zenyoni," kusho yena.

"Izinkukhu zeLeghorn (ezakha iningi lemboni yeqanda lezentengiselwano e-US) zibeka amaqanda amhlophe, kuyilapho ama-orphingtons noma amadwala ePlymouth azolala amaqanda ansundu," kuchaza. "Uhlobo lwe-Ameraucana lune-pigment ekwazi ukuhlanganisa lonke igobolondo leqanda futhi lenze amaqanda anemibala eluhlaza okwesibhakabhaka enemibala ngaphakathi nangaphandle kwegobolondo."

Ufuna ukwazi ukuthi inkukhu ethile izophuma iqanda elimhlophe noma iqanda elinemibala? Hlola i-earteb yenkukhu. (Isimanga, izinyoni zine-amabili! Futhi kaningi kunalokho, izinkukhu ezinezimpaphe ezilula zawo zangaphambi kwezimpaphe, futhi ngaleyo ndlela amaqanda amhlophe, ngenkathi labo abanezimpaphe ezinemibala kanye nezimpaphe ezinemibala nokukhiqiza amaqanda anemibala.

Uqhamukaphi lombala? Nakhu lapho ukuqonda ukuthi iqanda liqala kanjani ukubalulekile. Inkukhu Yelks, noma i-OVA, ifomu kuma-ovari enkukhu. I-ovum eyenziwe ngokuphelele izoshiya i-ovary futhi ibekwe ku-oviduct. Le ngxenye yohlelo lokuzala lwenkukhu inezigaba ezinhlanu ezihlukile ezihambisana nalo i-yolk idlula lapho iye ezweni langaphandle, kepha yilesine - indlala yegobolondo - ethinta umbala weqanda. Yilapho amagobolondo azungeza i-ovum.

"Igobolondo lawo wonke amaqanda enkukhu enziwe nge-calcium carbonate, ikristalu emhlophe ngombala," kusho uFowler. "Ngakho-ke wonke amaqanda akhona, okungenani ekuqaleni, emhlophe. Noma yini thina esibona ukuthi eminye imibala iye yaba ne-oviduct, ngemuva kokuthi i-White Shell Shell yayifakiwe. Ungabona Lokhu uma uvula iqanda elinsundu bese ubheka ingaphakathi legobolondo, lizoba mhlophe. "

Imibala emibili inesibopho sombala weqanda lenkukhu. Izithunzi zemifino kanye ne-blues zibangelwa yi-piliverdin ye-pigment, kuyilapho i-protoporphyrin ibhekele ama-purdish-brown.

Inqubo efanayo yokufaka imibala yeqanda ibamba lazo zonke izinyoni ezinamaqanda anemibala. Amaqanda aseMelika e-American American (ngokwesibonelo, anombala oluhlaza okwesibhakabhaka. Amaqanda abunjwe ngopharele weMurre (Uriya Aalge) angadlala i-hue eluhlaza okwesibhakabhaka, aqhekeze noma afake imithambo yensundu.

Ingabe amaqanda enkukhu kufanele agcinwe aqandisiwe noma emazingeni okushisa asekamelweni? Kuya ngokuthi uhlala ezweni (Australia, Japan nase-United States, ngokwesibonelo) esidinga amaqanda akhiqizelwe ukuthengiswa kwezentengiselwano. Le nqubo ivikela ngokumelene ne-salmonella, kodwa futhi isusa i-waxy shell coating evikela ngokwemvelo ukuvikela amaqanda ngokumelene nama-microorganisms, ngaleyo ndlela kudinge isiqandisi.

Ngaphezu kwalokho, uma unentshisekelo ephepheni lesikebhe lesikebhe e-EVA noma i- EVA SUP Pad & Eva Traction Pad , sicela ukhululeke ukuxhumana nathi.

Iqembu le-Hellors

2018.03.20

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