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Prispevek k optimizaciji gnojenja koruze (Zea mays L.) na Sorškem polju : visokošolska diplomska naloga = Contribution to optimization of fertilization of maize (Zea mays L.) in Sorško polje : graduation thesisOblak, StankoNa Sorškem polju smo v letu 1997 postavili gnojilni poskus s koruzo (Zea mays L.), cv. Mirna. Postavili smo 6 različnih variant v 4 ponovitvah: 1. kontrola brez gnojenja, 2. brez gnojenja ob setvi + ... dognojevanje z N junija po analizi tal (dog. N), 3. hlevski gnoj tik pred setvijo (HG) + dog. N, 4. HG + 30 kg N/ha + dog. N, 5. HG + 80 kg N/ha, 80 kg P2O5/ha, 250 kg K2O/ha + dog. N, 6. HG + 30 kg N/ha, 80 kg P2O5/ha, 250 kg K2O/ha + dog. N. Proučevali smo dinamiko mineralnega N v tleh ter primerjali hitre teste na N za določanje potreb po dognojevanju koruze (klorofilomer, hitri talni nitratni test) z laboratorijsko določitvijo Nmin. Spremljanje gibanja Nmin nam je pokazalo optimalni čas za dognojevanje koruze, to je v drugi polovici junija, ko koruza zelo bujno raste in potrebuje veliko N. Hitri talni nitratni test in pennsylvanska metoda (klorofilomer) dasta primerljiv napotek za dognojevanje z N, laboratorijska Nmin metoda pa manjšega, predvsem kjer smo ob setvi gnojili z mineralnim N. Učinkovitost gnojenja smo ugotavljali z meritvami pridelka in vsebnosti hranil v silaži. Negnojena varianta je dala 9,4 t s.s. silaže/ha (odvzem N s pridelkom je 58 kg/ha). Samo dognojevanje z N je pridelek skoraj podvojilo, (17,2 t s.s./ha). Neto mineralizacija N iz HG je bila 48 kg N/ha (20% N iz HG). Največji pridelek je omogočilo gnojenje s HG in N80PK gnojilom ob setvi in dognojevanje po analizi tal in sicer 21,2 t s.s./ha. Pri podatku P in K k osnovnemu gnojenju koruze ob setvi nismo dobili večjega pridelka kot pri gnojenju le z N in HG, izboljšala pa se je kakovost silaže: več storžev ter večja vsebnost P in K v silaži.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [S. Oblak], 1999Language - slovenianCOBISS.SI-ID - 2639737
Author
Oblak, Stanko
Other authors
Lobnik, Franc, 1942- |
Leskošek, Mirko, 1923-2007
Topics
gnojenje |
gnojilni poskus |
koruza |
Zea mays L. |
dušik |
fosfor |
hitri talni nitratni test |
analize tal |
N-tester |
Nmin |
dinamika dušika |
analize pridelka |
Sorško polje |
Sorško polje
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Agronomy, Ljubljana | Ljubljana | BFAGR |
outside loan 1 cop.
reading room 1 cop. |
Shelf entry
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Lobnik, Franc, 1942- | 00952 |
Leskošek, Mirko, 1923-2007 | 00327 |
Source: Personal bibliographies
and: SICRIS
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