Vol. 9, Issue 8 (2020)

Author(s):
Papori Phukan Borpuzari, Manish Kumar Singh and Arindam Dutta

Abstract:
The medicinal and food tree species Parkia timoriana (Faba¬ceae: Mimosoideae) is widespread in north eastern region of India, where it has a strong socio-cultural and economic importance. However, the populations of this species are highly threatened in large parts of its range due to overexploitation and environmental degradation. Thus, attempt has been made to propagate this valuable tree sp. through air-layering method and establishment of multi-location trial for genetic conservation of the species. The objective mainly highlighted the response of wrapped and unwrapped in root regeneration. For regeneration through air layering, two different rooting media were tested during rainy season. Selected branches were treated with 200ppm IBA and the media covered with sand, soil and FYM (in 1:2:2 ratio) with moistened sphagnum moss and wrapped with polythene strips. The covered transparent polythene strips depict best root initiation after six weeks of incubation. Whereas, branches wrapped with coconut husk and without polythene sheet strips shows no roots initiation. The branch treated without hormone also failed in the study. Further, it was observed that branches wrapping for extended period, upright or straight branches were having rotting symptoms. Inclined branches towards the earth respond for better result than the straight one. Cut rooted branches were shift immediately to polybags having 1:1:1 soil: sand: FYM medium and kept under shed to 30 days so for their survival.