Abstract
The experiment was conducted in the Agronomy Laboratory of Agrotechnology Discipline, Khulna University, Khulna from 29th August to 17th September, 2009. The experiment was laid out in a Completely Randomized Design (CRD) with two factors and three replications. The aim of the experiment was to study the efficacy of three osmopriming agents viz ., NaCl, KC1 and CaCb with control on seed germination and seedling growth of three T. aman rice varities viz., BRRI dhan40, BRRI dhan41 and BINA dhan7. Among the chemicals CaCb showed best as osmopriming agents and it enhanced all germination parameters. BRRI dhan41 showed the best performance. Better root length and shoot length were observed in control. Seeds of BRRI dhan41 when treated with NaCl showed the highest germination percentage (98.67%), germination energy (88%), germination speed (96.83%), but vigor index (10.63) was found highest in BRRI dhan40 when it was treated with KC1. BRRI dhan41 produced the largest root (8.56 cm) when seeds were treated with NaCl. BRRI dhan40 (10.51 cm) and BINA dhan7 (10.53 cm) produced the highest shoot length at controlled condition and CaCl2 treated seed, respectively. DOI: http://dx.doi.org/10.3329/jbau.v10i1.12013 J. Bangladesh Agril. Univ. 10(1): 1520, 2012
Highlights
Rice (Oryza sativa L.) is the most important and extensively cultivated cereal crops in Bangladesh
Rice has been considered as staple food of the Bangladeshi people about 80% of the total cultivated lands in Bangladesh are used for rice cultivation and its total production is 31.98 million metric tons (BBS, 2011).Rice supplies more than 70% of calories (Khush, 2008) and more than 50% proteins (Islam, 2009) as well as contributes 95% of the cereals consumed in Bangladesh
Uneven or poor germination and subsequently uneven seedling growth can lead to great financial losses, by reducing crop production or lower prices of uneven plant batches (Ghiyasi et al, 2008a)
Summary
Rice (Oryza sativa L.) is the most important and extensively cultivated cereal crops in Bangladesh. Seed priming treatments can lead to better germination and establishment in many crops such as maize, wheat, rice, canola (Basra et al, 2005; Ghiyasi et al, 2008a, b). In another way seed priming could be defined as controlling the hydration level within seeds so that the metabolic activity necessary for germination can occur but radical emergence is prevented. Different physiological activities within the seed occur at different moisture levels (Taylor, 2007). The last physiological activity in the germination process is radical emergence. The initiation of radical emergence requires high seed water content
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