Response of poplar clones to different soil types and growth regulator at nursery stage
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Date
2014
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Punjab Agricultural University, Ludhiana
Abstract
In present investigation the response of two types of soils (Sandy loam and Sandy clay loam
soil) and foliar application of growth regulator i.e. Triacontanol at three levels (0ppm, 3ppm,
5ppm) was investigated on nine poplar clones (PL-1, PL-2, PL-3, PL-4, PL-5, PL-6, PL-7, L47/88,
L-48/89) at nursery stage, conducted at Research farm area of department of Forestry
and Natural Resources, Punjab Agricultural University, Ludhiana. Various attributes like
growth characteristics, physiological parameters and nutrient content in leaves were recorded
at different interval of growth. The results of the study revealed that Triacontanol showed non
significant and soil types showed significant results for morphological characters Viz. Plant
height, collar diameter, no. of branches/plant, no. of leaves/plant, leaf area. Sandy clay loam
soil showed good response than sandy loam soil for all morphological characters. For
physiological characters like chlorophyll content, soil types showed non significant results
and growth regulator showed significant results. Triacontanol at 5ppm concentration showed
higher chlorophyll content during July and October 2013 by 30.88 and 36.21 SPAD units,
respectively. For nutrient content analysis like nitrogen, phosphorus and potassium in leaves
of poplar clones, growth regulator and different soil types showed significant results. After
critical analysis it was concluded that PL-7, PL-4, PL-2 and PL-1 were better clones among
all other clones studied for morphological characters. PL-1, PL-4 and PL-7 showed higher
growth characters in sandy loam soil and PL-1, PL-5 and PL-7 clones in sandy clay loam soil.