Allelopathic Effect of Three Tree Species of Bauhinia on Some Traditional Crops of Garhwal Himalaya
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Date
2017-07
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College of Forestry, Ranichauri, V.C.S.G. Uttarakhand University of Horticulture and Forestry
Abstract
Agroforestry system has potential to increase the overall yield, it essentially create
competition among the components for resources in addition to presence of allelochemicals in
either of the component which has impact on productivity. The present study entitled “Allelopathic
Effect of Three Tree Species of Bauhinia on Some Traditional Crops of Garhwal Himalaya” was
conducted in Ranichauri, Uttarakhand, India, during 2016 to 2017 to see the allelopathic effect of
three tree species of B. purpurea (Khairwal), B. semla (Semla), and B. variegata (Kachnar) on five
agriculture crops- (i) L. culinaris (Lentil), (ii) E. coracana (Finger millet), (iii) T. aestivum
(Wheat), (iv) V. umbellata (Rice bean) and (v) E. frumentacea (Barnyard millet). The germination
responses in terms of different extracts of leaf and bark of tree species showed that the maximum
average seed germination percent varied to great extent irrespective of different leaf and bark
extracts. In all the leaf extract concentrations, maximum of 100% germination in L. culinaris, V.
umbellata, and MGT of 3.86 days in T. aestivum recoded on B. purpurea. In bark extracts of tree
species, the maximum MGT of 7.45 days in T. aestivum and minimum of 1.28 days in L. culinaris
under 5 % concentrations of B. variegata. Maximum GI of 4.16 in L. culinaris at 5% concentration
of leaf and bark extract of B. variegata. The extracts had different influences on seed germination,
root and shoot growth, MGT and GI of test crops. Overall, allelopathic effects are species specific;
L. culinaris and T. aestivum were most resistant to leaf and bark extract than, V. umbellata, and E.
frumentacea, E. coracana was most sensitive. The current study providing some relevant
information’s of allelopathic effect of three tree species of Bauhinia on five test crops will assist
identify local tree crops with less toxic effects in the soil and recommending suitable species for
agroforestry planting programme for better farm management.
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