Pre-sowing treatment and seedling performance for nursery production of Morus laevigata Wall. under Eastern Himalayas
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Date
2021-04-09
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College of Horticulture and Forestry, Central Agricultural University, Pasighat
Abstract
The experiment on potting media was carried out in RBD with 22 treatments and 3 replications each. Based on the growth performance of the seedling - height, collar diameter, number of leaves, number of branches, root length, root spread, root dry weight, shoot dry weight, root/shoot ratio, root coiling and total biomass percentage were recorded every two months from August 2019 – June 2020. T15- Soil+ Cocopeat + FYM @ 1:1:1, in polybag of size 12.5 x 22.5 cm is found to be the best among all treatment combinations, although other treatments too have made a successful contribution in relation to growth parameters of the seedling. Seedlings on polybags tend to develop root coiling. Therefore, to avoid root coiling seedling could be raised in root trainers.
Principal component analysis was done to analyze the variation in the foliar characteristics of the seedlings and the mature tree. The findings on the study shows a significant difference between the juvenile leaves and the mature leaves of the species.
Description
The present study was carried out in the laboratory and research field of Department of Silviculture and Agroforestry, College of Horticulture and Forestry, Pasighat, ArunachalPradesh in the year 2019-2020. The experiment for seed germination parameters in laboratory condition was carried out in CRD with 18 treatments for germination parameters which were replicated 4 times. The maximum germination of 67.28% was recorded in the treatment T11- Macerated seed dipped in Gibberellicacid (0.1%) overnight in lab condition, followed by T9 - Macerated seed dipped in Gibberellic acid (0.025%) overnight (57.76%), T4- Macerated, washed and drying for 2 days (51.52%), T14 -Macerated seeds treated with Boric acid (1000 ppm) for 24 hours (46.75 %), T10- Macerated seed dipped in Gibberellicacid (0.05%) overnight (44.99%), T3- Macerated, washed and sowing fresh (43.13%), and T15- Macerated seeds treated with Boric acid (2000 ppm) for 24 hours (42.26 %), and the minimum germination percentage was recorded in T5- Macerated, washed and drying for 1 week (23.76 %) and T1- Fruits sown without de-pulping (12%). No germination was recorded in T2- fruits dried with pulp.