EFFECTS OF SURFACE DRAINAGE AND DIFFERENT RATES OF NITROGEN FERTILIZER ON OIL PERCENTAGE, PROTEIN AND GRAIN YIELD OF RAPESEED

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SALAHSHOOR DELIVAND F.; HOSEINZADE DALIR A.; FAKHERIFARD A.; KAVOSI M.; YAZDANI M.R.; DAVATGAR N.

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Journal: JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH Year:2007 | Volume:8 | Issue:2 Page(s): 119-134

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Title

EFFECTS OF SURFACE DRAINAGE AND DIFFERENT RATES OF NITROGEN FERTILIZER ON OIL PERCENTAGE, PROTEIN AND GRAIN YIELD OF RAPESEED

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Keywords

NITROGEN FERTILIZERQ3

OILQ3

RAPESEEDQ3

SURFACE DRAINAGEQ3

Abstract

This field experiment was conducted in order to investigate drainage and NITROGEN FERTILIZER effects on grain yield and OIL percentage of RAPESEED. The split-plot method in a randomized block design (RCBD) with variety of Hyola 308 in three replications was employed in the paddy field at the north of Iran (Rasht - Rice Research Institute of Iran). Treatments were included three drainage levels (without drain, surface drain with 2m spacing and average depth of 15cm, surface drain with 4m spacing and average depth of 15cm vertical ditches of 1m spacing and average depth of 7cm) and four NITROGEN FERTILIZER levels (0, 150, 200 and 250kgN/ha that split as 1/3, 1/3, 1/3). The results indicated that, drainage increased grain yield, OIL percentage, nitrogen uptake, nitrogen recovery efficiency. Agronomy efficiency 94.33-97.82%, 2.47-3.88%, 96.55-103.50%, 88.01-125.30% and 104.69-167.18% respectively, but reduces protein percentage 4.21-9.76%. Also, NITROGEN FERTILIZER increases grain yield, protein percentage and nitrogen uptake 199.08-239.60%, 5.31-7.60% and 233.26-292.44% respectively but reduces OIL percentage, nitrogen recovery efficiency and agronomy efficiency 0.74-3.35%, 10.24-24.77% and 11.39-21.84% respectively. In general considering all phenomena involved in the paddy fields (environmental problems, soil condition, operational suitability, costs, ...) surface drain with 4m spacing along with NITROGEN FERTILIZER of at least 150kgN/ha can be suggested.

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