Document Type : Research Paper


Instructor, Department of Agronomy, Faculty of Agriculture, Sari Agricultural Sciences and Natural Resources University, Sari, Iran


In order to evaluate row spacing and microelements spraying on yield and some morphological traits of
peppermint, a split plot experiment was conducted based on randomized complete block design with four
replications in Sari Agricultural Sciences and Natural Resources University during 2010-2011. Three
levels of row spacing (50 × 10, 50 × 20 and 50 × 30 cm) and two levels of microelements (no spraying
and spraying) were evaluated on peppermint at two harvesting time. The results showed that the first
harvesting had significant effect on plant height, oil yield and dry matter. Maximum oil yield (19.1 lit.ha1)
and dry matter (1121.3 kg.ha-1) was obtained in the first harvesting time. Microelements had significant
effect on wet matter (3321.3 kg.ha-1), dry matter (987.7 kg.ha-1) and oil yield (19.63 lit.ha-1). Maximum
dry matter (1015.5 kg.ha-1) and oil yield (20.31 lit.ha-1) was obtained in (50 × 20 cm) row spacing with
spraying. 50 × 20 cm row spacing with spraying recommended, because of maximum oil yield in


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