Enrichment of growing media using biochar, compost, and nanosilica for the cultivation of Oryza sativa L.

E. Widiasri¹, R.R. Maulani¹, D. Nofitasari¹, K. Lambangsari¹, R. Manurung¹ and M.Y. Abduh¹²*

¹School of Life Sciences and Technology, Institut Teknologi Bandung, Jalan Ganesha 10, ID40132 Bandung, Indonesia
²University Center of Excellence for Nutraceuticals, Bioscience and Biotechnology Research Center, Institut Teknologi Bandung, Jalan Ganesha 10, ID40132 Bandung, Indonesia
*Correspondence: yusuf@sith.itb.ac.id

Abstract:

This study investigated the effect of growing media composition on the growth and productivity of Oryza sativa var. Inpago 7 cultivated in polybags at Sumedang, West Java, Indonesia, for 126 days. A randomized block design was applied with nine combinations of growing media. Each treatment consisted of five polybags and was replicated three times. Plant height, number of leaves, and tillers were measured at 15, 30, and 45 days after transplanting to observe the growth parameters. While, for estimation of productivity were recorded the weight of dry grain harvest (DGH), the weight of dry milled grain (DMG), and the weight of 100 grains (g) were recorded for each treatment for estimation of productivity. The results showed that the highest number of panicles (24 panicles per plant), the weight of dry harvested grain (21.74 g per plant), and weight of dry milled grain (17.83 g per plant) were obtained when cultivated with a growing medium containing soil, biochar, synthetic fertilizer, urea and sprayed with nano-silica. The growing media composition did not influence the weight of 100 grains because it is more influenced by genetic characteristics. An appropriate combination of soil, biochar, synthetic fertilizer, urea, and sprayed with nano-silica is recommended as a growing media for cultivating O. sativa L. var. Inpago 7.

Key words:

biochar, growing media, nanosilica, Oryza sativa

Analysis of heritability and genetic variability of agronomically important traits in Oryza sativa x O. rufipogon cross

K.K. Sabu ¹*, M.Z. Abdullah², L.S. Lim¹ and R. Wickneswari¹

¹ School of Environmental and Natural Resource Sciences, Faculty of Science and Technology,
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.
² Gene Bank, MARDI Seberang Perai, PO Box 203, 13200 Kepala Batas, Pulau Pinang,
Malaysia.
* Corresponding author; Present address: Tropical Botanic Garden and Research Institute,
Thiruvananthapuram 695562, India. Email: krishnan.sabu@gmail.com

Abstract:

Heritability is a measure of possible genetic advancement under selection. Estimation of variance components could imply partitioning of genetic variability over different sources of variation. This article describes statistical methods applied and some of the observations made on results of heritability and analysis of environmental variances of grain yield and related traits of progenies derived from a cross between wild and cultivated rice. The study shed light on the genetic information of grain yield and related traits such as their heritability, genetic and environmental effects in the F1 progenies of a cross between O. sativa and O. rufipogon. A considerable amount of additive genetic variation was found in these families. The traits with high heritability, considerable phenotypic correlation and low seasonal variability can be used in further improvement of the F1 progenies. The results obtained were highly promising and can be utilized to develop new rice cultivars.

Key words: