Journal of Food, Agriculture and Environment

Effects of tillage method, seed rate and microelement spraying time on grain yield and yield components of rapeseed (Brassica napus) in warm dryland condition

Author(s):

S. Fooladi Vanda, A. Aynehband ^*, F. Naraki

Recieved Date: 2009-05-17, Accepted Date: 2009-10-09

Abstract:

An experiment was conducted to investigate the effects of different tillage systems (conventional and conservation tillage), seed rate and spraying time on the grain yield and yield components of rapeseed in dryland conditions, this experiment was performed at Agriculture Education Center in Gachsaran during 2007-2008 growing season by RCBD design and strip split plot with 3 replications. Main plots included tillage methods: 1) no-tillage, 2) chisel plow + disk harrow, 3) disk harrow + disk harrow, 4) conventional-till seed drilling, 5) mould board + disk harrow. Sub plots included seed rate with 3 levels, namely 5, 7 and 9 kg/ha, and finally microelements spraying time with 3 levels, namely no spraying, spraying before stem elongation and spraying after flowering. During the growing season yield and yield components of rape seed were recorded. Our results showed that conventional till seed drilling treatment had the highest positive effects on canola yield among treatments. In seed rate treatments, 5 kg/ha exhibited lower yield compared with 7 and 9 kg/ha. There was significant difference between two times spraying (spraying before stem elongation and after flowering) and no spraying on the canola yield. The highest yields were achieved by conventional till seed drilling with 7 kg/ ha seed rate treatment (2957 kg/ha), conventional till seed drilling and spraying before stem elongation treatment (2936 kg/ha) and 7 kg/ha seed rate and spraying before stem elongation (3046 kg/ha), respectively. The least grain yield was recorded in no-tillage treatment with 5 kg/ha seed rate (1317 kg/ha), no-tillage without spraying (1234 kg/ha) and in 5 kg/ha seed rate without spraying (1168 kg/ha), respectively. Generally, planting with conventional-till seed drill device, 7 kg/ha seed rate and spraying before stem elongation were better than the other treatments.

Keywords:

Conservation tillage, seed rate, microelement, rapeseed

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Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 3&4
Category: Agriculture
Pages: 627-633

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