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2022, vol. 47, br. 3, str. 87-100
Proučavanje sečiva noževa rotacione kosačice i njihovi efekti na proizvodnju zelene mase
Agricultural Engineering Research Institute, Dokki, Giza, Egypt

e-adresaebaily_m@yahoo.com
Ključne reči: kosačica sa bubnjem; habanje; mašina za sitnjenje stočne hrane
Sažetak
Egipatska detelina (Trifolium alexandrinum) je glavna i najstarija gajena zimska krmna leguminoza u Egiptu. Zauzima oko jedne trećine obradivih površina sa prosekom od 1,63 miliona fedana (feddan=4.200 m2 ), a procenjenim prinosom od oko 42,03 miliona tona zelene mase [7]. Poslednjih godina mašina za kondicioniranje zelene mase u Egiptu je kosačica sa vertikalnim rotacionim bubnjevima sa noževima, koja se uspešno koristi za košenje deteline. Srednji ciljevi trenutnog istraživanja su procenjeni na novim i istrošenim noževima kosačice postavljenih na vertikalne rotacione bubnjeve Takođe, proučen je uticaj novih i istrošenih rotacionih noževa na prinos zelene stočne hrane u lokalnim uslovima. Trenutno istraživanje sprovedeno u istraživačkoj stanici Sakha, Egipat u toku perioda 2016/2017. Kosačica je agregatirana na traktor i obavljeno je košenje egipatske deteline Berseem (tip Sacha-4) sa tri različita sadržaja vlage 65,4%, 57,3 i 46,2% (w.b.). Urađeno je drugo košenje deteline tipa Berseem (Trifolium alexandrinum). Rezultati su pokazali da je prosečna maksimalna vrednost prinosa iznosila 4,96 tona u poređenju sa 2,42 tone za Alfalfa sa sadržajem vlage od 56,3 %. Ovaj rezultat je pokazao da staro sečivo rotacionog noža zbog istrošenosti, habanja smanjuje produktivnost za 49,9%. Prosečna najveća vrednost potrošnje goriva iznosila je 23,04 L/fad za košenje deteline tipa Trifolium alexandrinum, u poređenju sa 15,4 L/fad za egipatsku detelinu Berseem (tip Sacha-4) sa sadržajem vlage 65,7 %. Rezultat ukazuje da staro sečivo ili nož ima manje vrednosti potrošnje goriva u L/Fed, kao i da staro sečivo ili nož zbog habanja smanjuje dobijenu snagu izlaznog vratila PTO. Prosečne vrednosti zahtevane snage traktora (KS) za košenje deteline bile su 28,83; 24,9 i 25,0 za stari nož pri 65,7 % sadržaju vlage, u poređenju sa 47,67; 39,8 i 38,27 za novo sečivo i sadržaj vlage 65.7 %, 57.3 % i 46.2 % respektivno.. Cilj ovog istraživanja je procena performansi novih i istrošenih noževa postavljenih na rotacione bubnjeve kosačice. Takođe, proučavan je uticaj novih i starih noževa na prinos zelene stočne hrane u lokalnim uslovima.
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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.5937/PoljTeh2203087E
primljen: 06.01.2021.
revidiran: 22.08.2022.
prihvaćen: 25.08.2022.
objavljen u SCIndeksu: 09.09.2022.

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