Abstract
Development of recommendation on appropriate plant spacing is one of
the important agronomic practices to increase the productivity
of lettuce. Therefore, a field experiment was conducted to assess the
response of Tesfa Mekelle lettuce variety to different inter and intra
row
spacing in 2014 cropping season at Illala. The experiment was arranged
in a factorial combination of three levels of intra row spacing (30, 40
and 50cm) and two levels of inter row spacing (60 and 70 cm) in
randomized complete block design (RCBD) with three replications. The
result
revealed that plant spacing showed significant effects on leaf number
per plant, plant width and fresh biomass yield per hectare. Conversely,
the treatment combinations did not significantly affect plant height and
leaf length. The highest number of leaves per plant was recorded at 50 x
60 cm intra and inters row spacing and the lowest was obtained from 30 x
60cm intra and inters row spacing respectively. The highest biomass
yield (53.6 ton ha-1) was recorded at 40 x 60cm and no
further increases was observed when intra spacing increase to 50 cm nor
inter row
spacing increase up to70cm. The lowest was recorded in spacing 50×70cm.
Therefore, it is vital to demonstrate the best treatment (40x60cm)
under farmer’s conditions.
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