Effects of naphthalene acetic acid on yield attributes and yield of two varieties of rice (Oryza sativa L.) (original) (raw)
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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 (V1) and BRRI dhan-50 (V2). 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.
COMPARATIVE GROWTH ANALYSIS OF TWO VARIETIES OF RICE FOLLOWING NAPHTHALENE ACETIC ACID APPLICATION
A pot experiment showed that 100 and 200 ppm naphthalene acetic acid (NAA) plant height, number of leaves per plant and number of tillers per plant were found to increase due to 100 ppm NAA only in BRRI dhan-29 (V1) and varied significantly at 60 DAS. Total dry matter (TDM) was found to increase up to harvest due to both the treatments in V1, whereas, in BRRI dhan-50 (V2) also increased at 15 and 30 DAS and the variation was non-significant. There was an increasing tendency in leaf area per plant due to T1 treatment in both the varieties except at 45 DAS in V2. Significant variations were observed at 15 and 30 DAS only in V1. Relative growth rate (RGR) was maximum at early stage of growth and then declined in both the varieties. RGR was significant during 0 to15 and 45 to 60 DAS in case of V1. Net assimilation rate (NAR) was non-significantly affected and found to increase during 15 to 30 DAS following both the treatments in V1, but in V2 due to T2 treatment only. Out of the two concentrations 100 ppm NAA produced better stimulation.
EFFECTS OF NAPHTHALENE ACETIC ACID ON NUTRIENT UPTAKE BY TWO VARIETIES OF RICE (ORYZA SATIVA L.)
An experiment was conducted to find out the responses of two varieties of rice to NAA on nitrogen (N), phosphorus (P), and potassium (K) uptake by straw and root at three different stages and NPK concentrations in grains. Nitrogen, P and K uptake by both straw and root were found to increase and decrease depending on the concentration of NAA and also on the stages of development. Uptake of NPK were recorded higher at the tillering stage and at harvest with a few exceptions, whereas, lower uptake at the flowering stage in most cases. However, NPK concentrations in grains were favourly influenced by 200 ppm NAA in both the varieties except K concentration of BRRI dhan‐29 (V1). Variations among the treatments were non‐significant in the majority of cases. Out of the two varieties BRRI dhan‐29 (V1) showed comparatively more positive response to NAA that BRRI dhan‐50 (V2).
Effects Of Naphthalene Acetic Acid On Nutrient Uptake By Two Varieties Of Rice (Oryza Sativa L.)
Dhaka University Journal of Biological Sciences, 2012
An experiment was conducted to find out the responses of two varieties of rice to NAA on nitrogen (N), phosphorus (P), and potassium (K) uptake by straw and root at three different stages and NPK concentrations in grains. Nitrogen, P and K uptake by both straw and root were found to increase and decrease depending on the concentration of NAA and also on the stages of development. Uptake of NPK were recorded higher at the tillering stage and at harvest with a few exceptions, whereas, lower uptake at the flowering stage in most cases. However, NPK concentrations in grains were favourly influenced by 200 ppm NAA in both the varieties except K concentration of BRRI dhan?29 (V1). Variations among the treatments were non?significant in the majority of cases. Out of the two varieties BRRI dhan?29 (V1) showed comparatively more positive response to NAA that BRRI dhan?50 (V2). DOI: http://dx.doi.org/10.3329/dujbs.v21i1.9740 DUJBS 2012 21(1): 9-15
1-Naphthaleneacetic Acid in Rice Cultivation
Current Science
Rice is consumed by half of the world's population. It is a model monocotyledonous crop. In this communication, the effect of 1-naphthaleneacetic acid (NAA) on the growth, yield attributes and yield is elaborated. Results show that NAA, a synthetic auxin, when applied in spray influences the life cycle of rice via metabolic processes to manifest beneficially through translocating assimilates from source to sink, and hence the yield.
Changes In Biochemical Components Of Rice Following Naa Application
Journal of the Asiatic Society of Bangladesh, Science, 2014
An investigation on the effect of Naphthalene acetic acid (NAA) on the changes of biochemical components of two varieties of rice (Oryza sativa L.), BRR1 dhan 29 and BRRI dhan 50 was carried out. Two concentrations of NAA, 100 and 200 ppm were used as foliar spray. In BRRI dhan 29, significant increases in chlorophyll a and chlorophyll b contents of leaf were observed due to both the treatments at the flowering stage, whereas, carotenoids at the grain filling stage only. But in BRRI dhan 50, the total leaf pigments decreased at the flowering and grain filling stage, but was significant in case of chlorophyll a at the flowering stage. Significant increases in protein content of leaf were recorded at the tillering and flowering stage of BRRI dhan 29 following 100 ppm NAA treatment. In BRRI dhan 50, the only significant increase was recorded at grain filling stage due to 200 ppm NAA treatment. In both the varieties carbohydrates, protein, fat, and energy content of grain increased due to both the treatments and the maximum increase in all the cases was recorded due to 100 ppm NAA treatment. Ash and moisture content of grain reduced following both the treatments in both the varieties, the maximum reduction was due to 100 ppm NAA treatment.
Sarhad J. Agric, 2011
It was noted that plant height, productive tillers, 1000-grain weight, paddy yield, and harvest index were maximum at 90 ml followed by 60 and 120 ml ha-1 and minimum in control during both years. Where as in phosphorus levels maximum plant height, productive tillers, 1000-grain weight, paddy yield and harvest index were recorded at 100 kg P 2 O 5 ha-1 followed by 150,200 and 50 kg P 2 O 5 ha-1. The treatments interactive effects of plant growth regulator and phosphorus levels were maximum in 90 ml NAA x 100kg P 2 O 5 ha-1 and minimum in control plots during both years.
Effect of naphthaleneacetic acid on root and plant growth and yield of ten irrigated wheat genotypes
Pakistan Journal of Botany, 2018
Plant growth regulators (PGRs), such as 1-naphthaleneacetic acid (NAA), gibberellins, cytokinins, abscisic acid, and ethylene have become commercialized in some countries to increase the productivity of field crops and to fortify the value of horticultural crops. However, very limited research has been conducted in Bangladesh on root growth, plant biomass and yield of wheat (Triticum aestivum L.) using NAA. In this context, an experiment was conducted over two consecutive seasons, from November to April, in the research field of the Wheat Research Center (WRC) (under Old Himalayan Piedmont Plain), Dinajpur-Bangladesh. Treatments consisted of the application of 25 mg/l NAA in five temporal regimes: 1) NAA applied at 20, 35 and 50 days after emergence (DAS); 2) NAA applied at 20 and 35 DAS; 3) NAA applied at 20 and 50 DAS; 4) NAA applied at 35 and 50 DAS; 5) a control (without NAA). Treatments were applied to 10 irrigated spring wheat genotypes i.e.
SAARC Journal of Agriculture, 2017
Aromatic rice possess high potential to draw attention rice consumer of the world for its aroma, fragrance, grain morphology, quality and other desirable traits. The production of aromatic fine rice is profitable due to its prices up to 10 times more than common rice on international market (Chaudary et al., 2001). In Bangladesh, a number of fine rice cultivars are grown by the farmers specially Kataribhog, Chinisagar, Badshabhog, Kalizira, Tulsimala, Dulabhog, Basmati, Banglamoti (BRRI dhan50), BRRI dhan34, BRRI dhan37 and BRRI dhan38. Liming is a normal agronomic practice to manage acid sulfate soils for crop production. In Malaysia, some areas of acid sulfate soils have been reclaimed for rice cultivation using lime. In the acid sulfate soils of the Muda Agricultural Development Authority (MADA) granary areas in Kedah-Perlis coastal plains (northwest coast of Peninsular Malaysia), for instance, rice yield improved significantly after applying 2.5 tons of ground magnesium limestone (GML) ha-1. However, over liming may reduce crop yields due to lime induced P and micronutrient deficiencies (Fageria, 1984). Plant growth regulators (PGRs) are organic compounds, other than nutrients that modify plant physiological processes and also called biostimulants or bioinhibitors that act inside plant cells to stimulate or inhibit specific enzymes or enzyme systems and thus regulate plant metabolism. Recently, there has been global realization of the important role of PGRs in agriculture for better growth and yield of crop (Prasad and Paudel, 1994). These (PGRs) are being used as an aid to enhance yield. Naphthalene Acetic Acid (NAA) is one of the growth promoting hormones, which may play significant role to change growth characters and yield in BRRI dhan28.