IMPACT OF SEED WEIGHT AND PRE-SOWING TREATMENTS ON GERMINATION AND SEEDLING GROWTH OF CALOPHYLLUM INOPHYLLUM L.
Vikas Kumar1, Ajeesh, R. and Jijeesh, C.M.
1Department of Silviculture and Agroforestry, College of Forestry, Kerala Agricultural University, KAU, Thrissur, Kerala (India)
[Corresponding author E-mail1: firstname.lastname@example.org]
Received: 18-06-2015 Accepted: 21-10-2015
In the era of climate change, there is an increasing attention on alternate fuels especially towards biodiesel production. Calophyllum inophyllum L. has been identified as the most suitable feedstock for future generation biodiesel. However, its large scale cultivation is often constrained by the availability of good quality planting stock. The present study evaluated the response of size graded C. inophyllum seeds to different pre-sowing treatment and to evaluate the initial nursery performance of seedlings in the size graded seeds. The seeds were graded into size categories 2-5 (small), 5-8 (medium) and 8-11 g (large) based on their weight. The seeds belonging to different weight classes were subjected five pre-sowing treatments. It indicated that the germination parameters of the size graded seeds significantly influenced by the pre-sowing treatments and the seeds belonging to medium weight class without hard seed coat recorded the highest germination (83.3 %) which was followed by the large weight class. Size grading significantly influenced the seedling growth and biomass production and the performance of the seedlings was in the order large> medium> small. The various physiological, growth analysis and quality indices also supported the higher growth and biomass production of the large seedlings.
Keywords: seed weight, Calophyllum inophyllum, biodiesel, germination, quality indices