Effects of Tillage Systems on Maize Yield and Porosity of the Irrigated Chernozem Ploughing Layer
Uticaj sistema obrade na prinos kukuruza i poroznost oraničnog sloja navodnjavanog černozema
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Author
Kresovic, Branka
Tolimir, Miodrag
Keywords
tillageyield
total porosity
irrigated chernozem
obrada
prinos
ukupna poroznosti
navodnjavani černozem
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Show full item recordAbstract
With the aim to create favourable conditions for the plant development, the
studies on effects of different tillage systems on maize yield and porosity changes of the
irrigated chernozem ploughing layer were performed. The objective of the studies was
conventional tillage (disc harrow, plough, seedbed conditioner), reduced tillage (rotary
shredder) and direct drilling (direct drill seeder).
The analysis of variance performed for the yield shows significant differences
among observed tillage systems carried out on chernozem. The highest yield of
12.39 t•ha-1 was obtained by conventional tillage. Yields obtained by reduced tillage and
direct drilling were lower and amounted to 11.03 t•ha-1 and 10.03 t•ha-1, respectively. The
conventional tillage system provided the most favourable porosity with the average
value of 51.08%. With no statistical significant differences, the porous to solid phase
ratio was somewhat less favourable in soil tilled by the rotary shredder (50.47 vol.%),
while it was significantly lower in the variant of direct drilling (48.12 vol.%). U cilju stvaranja povoljnih uslova za razviće biljke, obavljena su proučavanja
uticaja različitih sistema obrade na prinos kukuruza i ukupnu poroznost oraničnog sloja
navodnjavanog černozema. Predmet istraživanja bila je konvencionalna obrada
(tanjirača, plug, setvospremač), redukovana (rotositnilica) i direktna setva (sejalica za
direktnu setvu).
Analiza varijanse prinosa pokazuje signifikantne razlike između proučavanih
sistema obrade černozema. Najbolji rezultati prinosa ostvareni su konvencionalnom
obradom-12,39t/ha, zatim redukovanom-11,03t/ha i najniži direktnom setvom-10,03t/ha.
Konvencionalna obrada obezbedila je najpovoljniju ukupnu poroznost sa prosečnom
vrednosti 51,08%. Bez statistički značajne razlike, odnos porozne i čvrste faze je bio
nešto nepovoljniji kod zemljišta obrađenog rotositnilicom-50,47zap%, a značajno manji
pri direktnoj setvi-48,12zap.%.