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Title:Vpliv inkarnatke (Trifolium incarnatum L.) in italijanske mnogocvetne ljuljke (Lolium multiflorum Lam.) na gospodarjenje z dušikom v kolobarju s koruzo (Zea mays L.)
Authors:Caf, Simona (Author)
Kramberger, Branko (Mentor) More about this mentor... New window
Podvršnik, Miran (Co-mentor)
Files:.pdf UNI_Caf_Simona_2013.pdf (712,78 KB)
 
Language:Slovenian
Work type:Undergraduate thesis (m5)
Organization:FKBV - Faculty of Agriculture and Life Sciences
Abstract:V letih od 2009 do 2011 smo v SV Sloveniji izvedli 3 ločene poljske mikroposkuse (naključni bloki v štirih ponovitvah), kjer smo ugotavljali vpliv inkarnatke (Trifolium incarnatum L.) in italijanske mnogocvetne ljuljke (Lolium multiflorum Lam.) na količino akumuliranega dušika, količino simbiotsko vezanega dušika, C : N razmerje v organski snovi dosevka, vpliv dosevka na mineralni dušik v tleh pred setvijo koruze (Zea mays L.) in na navidezni ostanek dušika v tleh (NODT) po spravilu koruze. Ugotavljali smo tudi vpliv dosevka in gnojenja na pridelek koruze in vsebnost dušika v pridelku koruze kot naslednje poljščine v kolobarju. V poskuse so bila vključena naslednja obravnavanja: mnogocvetna ljuljka, inkarnatka 1, kontrola (brez predposevka), po katerih je bila koruza gnojena s 120 kg N ha-1 in inkarnatka 2, po kateri je bila koruza gnojena s 60 kg N ha-1 in kontrolno obravnavanje brez predposevka. Dosevkov nismo gnojili, spravili smo jih na 2 načina: nepokošeno zaorano in pokošeno zaorano. Rezultati so bili združeni v eno statistično analizo. V poskusih je inkarnatka akumulirala signifikantno največ dušika, mnogocvetna ljuljka pa se je bolje izkazala v črpanju mineralnega dušika iz tal. V organski snovi mnogocvetne ljuljke je bilo široko C : N razmerje (50 : 1), kar je vplivalo na manjši pridelek koruze. V obravnavanju, kjer smo koruzo po inkarnatki 2 pridelovali ob zmanjšanem gnojenju z dušikom, je bil pridelek koruze in vsebnost dušika v pridelku koruze statistično na istem nivoju kot v obravnavanju z inkarnatko 1, kjer je bila koruza gnojena s 120 kg N ha-1. Način spravila dosevkov ni imel signifikantnega vpliva na pridelek koruze, vsebnost dušika v pridelku koruze in na navidezni ostanek dušika v tleh. Najmanj navideznega ostanka dušika v tleh je ostalo v obravnavanjih brez predposevka, največ pa pod obravnavanjih z inkarnatko. Inkarnatka se je v primerjavi z mnogocvetno ljuljko in kontrolo brez predposevka pokazala kot zelo dober predposevek koruzi, saj je povečala pridelek koruze in zmanjšala potrebe po gnojenju z dušikom.
Keywords:inkarnatka, mnogocvetna ljuljka, dušik, gnojenje, kolobar, koruza
Year of publishing:2013
Source:Maribor
NUK URN:URN:SI:UM:DK:HCIUVQ1P
Views:1525
Downloads:115
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Categories:FKBV
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Secondary language

Language:English
Title:Effects of crimson clover (Trifolium incarnatum L.) and Italian ryegrass (Lolium multiflorum Lam.) on nitrogen management in field rotation with maize (Zea mays L.)
Abstract:From 2009 to 2011 in the north-eastern part of Slovenia we carried out three field trials (randomised block with four replicates), where we investigated the effect of crimson clover (Trifolium incarnatum L.) and Italian ryegrass (Lolium multiflorum Lam.) on nitrogen accumulation, symbiotic nitrogen fixation, proportion C : N in the organic matter cover crops, the effect of cover crops on the mineral nitrogen in the soil before sowing maize (Zea mays L.) and the apparent nitrogen remaining in the soil after harvest of maize. We also investigated the effect of cover crops and fertilization on yield of maize as well as the nitrogen contents in the yield of maize as the subsequent crop in field crop rotation. Field trials included the following treatments: ryegrass, crimson clover-1, control without winter catch crop, after which the maize was fertilized with 120 kg N ha-1 and crimson clover-2, after which the maize was fertilized with 60 kg N ha-1. The cover crops were not fertilized, they were harvested in two ways: unmoved ploughed and mowed ploughed. The results were pooled into one statistical analysis. In experiments crimson clover accumulated significantly more nitrogen, while ryegrass proved to be better at absorbing mineral nitrogen from the soil. In the organic matter of ryegrass was a wide proportion C : N (50 : 1), which resulted in lower yields of maize. In the treatment, where we grown maize after crimson cower-2 with reduced fertilization with nitrogen, the yield of maize and the nitrogen content in the yield of maize was statistically at the same level as in dealing with crimson cower-1, where maize was fertilized with 120 kg N ha-1. The method of harvesting cover crops had no significant effect on the yield of maize, the nitrogen content in the yield of maize and the apparent residual nitrogen in the soil. The least apparent nitrogen residual in the soil remained in treatment without catch crop and the most remained under treatment with crimson clover. Crimson clover was found to be a very good catch crop in rotation with maze in comparison with ryegrass and control without catch crop. It increased the yield of maize and reduced the need for nitrogen fertilization.
Keywords:crimson cover, Italian ryegrass, nitrogen, fertilization, field rotation, maize


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