Effects of naphthalene acetic acid on yield attributes and yield of two varieties of rice (<i>Oryza sativa</i> L.)

Abstract

Effects of 100 and 200 ppm of naphthalene acetic acid (NAA) on yield attributes and yield of two varieties of rice during 2009 -2010 Boro season were evaluated. The highest plant height was observed due to 200 ppm in both BRRI dhan-29 (V 1 ) and BRRI dhan-50 (V 2 ). Number of tillers per plant were found to increase due to 100 ppm NAA only in BRRI dhan-29 and varied non-significantly. Yield attributes, viz. number of branches per panicle, number of grains per panicle and filled grains per panicle increased in BRRI dhan-29, following both 100 and 200 ppm NAA, whereas, most of the yield parameters decreased in BRRI dhan-50. Due to 100 and 200 ppm NAA, grain yield per plant increased by 27.67 and 6.85%, respectively in BRRI dhan-29 though not statistically significant. However, in BRRI dhan-50 grain yield per plant decreased by 26.54% due to 100 ppm and 27.67% due to 200 ppm. Out of the two concentrations 100 ppm NAA produced better stimulation.The use of growth regulators is considered as one of the way of increasing yield. NAA, a synthetic growth regulator has proved its potentiality that in appropriate concentration NAA affects the growth and yield of a number of plants viz. tomato (Chhonker and Singh 1959), bitter gourd (Jahan and Fattah 1991) and cowpea ( Ullah et al. 2007). Reports regarding the growth and yield aspect with NAA on cereal plants including rice are available in other countries (Misra and Sahu 1957, Chaudhuri et al.1980, Singh and Gill 1985, Grewal and Gill 1986, Muthukumar et al. 2005. In Bangladesh very limited research has been done on growth and yield aspects on cereal crops with NAA. Therefore, the present investigation was undertaken to study the effect of NAA on yield attributes and yield of two varieties of rice.The pot experiment was conducted in the garden of the Department of Botany, University of Dhaka during the period from November, 2009 to April, 2010. Each pot (about 30 cm in diameter at the top) was filled with 9.0 kg air dried soil. Cow-dung was mixed uniformly during pot preparation and 2 g of gypsum was also added in each pot (equals to 444 kg/ha). The experiment was laid out in a randomized complete block design (RCBD) with three replications. Plant materials were collected from Bangladesh Rice Research Institute (BRRI), Joydebpur, Gazipur. BRRI dhan-29 is a high yielding variety released in 1994 and BRRI dhan-50 is an aromatic variety released in 2008. Seeds were sterilized by 0.5% calcium hypochlorite solution and were sown on November 7, 2009. Seedlings were transplanted to pots at 5-leaf stage at 36 days after sowing. Five hills were placed in each pot, each hill containing one seedling. Thinning was done in such way that a healthy seedling of uniform size and vigour was allowed to grow. Irrigation was done as per necessity. Weeding was done twice on 25 and 45 day after transplanting (DAT). Split applications of urea were applied twice at the rate of 1 g per pot (equals to 222 kg/ha) at 20 DAT and at 50 DAT. There were three treatments as follows; T 0 = distilled...

Growth Yield and Yield Attributes of Tomato (Lycopersicon esculentum Mill.) as Influenced by Indole Acetic Acid

“…On the other hand, the lowest length of fruit was produced by Manik with 0 ppm IAA treated plots (4.57 cm) which was followed by the treatment combinations of BARI Tomato-7 × 0 ppm IAA (4.72 cm) and Ratan × 200 ppm IAA (4.83 cm). Abdel et al (1996) showed that due to application of IAA and GA 3 increased flux seed yield due to increased length of fruit, this result also supported by Adam et al (2011) who also found that the naphthalene acetic acid increased yield of two varieties of rice (Oryza sativa L.) for increasing length of caryopsis.…”

“…Abdel et al (1996) showed that due to application of IAA and GA 3 increased flux seed yield and their metabolic constituents. Adam et al (2011) also found that the naphthalene acetic acid increased yield of two varieties of rice (Oryza sativa L.). Sanyal (1995) also found that application of plant growth regulator at vegetative stage increased fruit yield per hectare of tomato.…”

“…On the other hand, the lowest diameter of fruit was attained by Ratan (3.83 cm) at control condition followed by Manik with 0 ppm IAA treated plots (3.90). Abdel et al (1996), Adam et al (2011) and Singh and Singh (2005) showed that due to application of IAA and GA 3 the yield of tomato increased due to increasing the length and diameter of fruit.…”

Effect of Plant Revitalization Hormone and Foliar Fertilization on Growth and Yield of Boro Rice

“…This might help to increase the productivity of tillers. Another report also showed that, tiller production did not significantly differ using 100 ppm and 200 ppm NAA plant hormone (Adam et al, 2011).…”

Changes In Biochemical Components Of Rice Following Naa Application

“…In Bangladesh, reports regarding the effect of NAA on growth, yield and yield attributes of rice are available. Adam and Jahan (2011) reported that in BRRI dhan 29, yield and yield attributes increased following 100 and 200 ppm NAA application, whereas, most of the yield parameters decreased in BRRI dhan 50. In a comparative growth analysis, Jahan and Adam (2011) observed differences in responses between two varieties of rice and between the two concentrations of NAA where, better stimulation was due to 100 ppm.…”