M. M. A. Mondal
Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh 2202, Bangladesh
A. B. Puteh
Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia
M. A. Malek
Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh 2202, Bangladesh
Institute of Tropical Agriculture, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia
M. R. Ismail
Institute of Tropical Agriculture, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia
M. Y. Rafii
Institute of Tropical Agriculture, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia
M. A. Latif
Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor, Malaysia
Plant Pathology Division, Bangladesh Rice Research Institute, Joydebpur, Gazipur, Bangladesh
Seed yield, Mungbean, Growth and Developmental
Experimental field of Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh
Crop-Soil-Water Management
The experiments were carried out at the experimental field of Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh (24°8′ N 90°0′ E), Bangladesh in Kharif-I (February-May) season of 2010 and 2011. Six mungbean varieties of which three high (BARImung-4, BINAmung-7, and BUmung-1) and three low (BARImung-6, BINAmung-6, and BUmung-2) yielding varieties were used as planting material. The soil of the experimental area is silty loam having a total of 0.065% nitrogen, 1.17% organic matter, 18.5 ppm available phosphorus, 0.30 meq/100g exchangeable potassium, 20 ppm sulphur and 6.8 pH. The experiments were laid out in a randomized complete block design with three replicates in both the years. Urea, triple superphosphate, muriate of potash, and gypsum were used as a source of nitrogen, phosphorus, potassium, and sulphur at the rate of 40, 120, 80, and 30 kg ha−1, respectively at the time of final land preparation. Seeds were sown on 10 and 14 March for the year of 2010 and 2011, respectively. A unit plot size of 20 m2 (5 m × 4 m) with plant spacing of 3 0 c m × 1 0 c m was used. Cultural practices were the same in both the seasons. Seeds were sown in line, and two weeks after germination, the plants were thinned to a density of 30 plants m−2. First weeding was done followed by thinning at about 20 days after sowing (DAS). A single irrigation was given at 21 DAS at both years. Insecticide (Ripcord 50 EC at 0.025%) was sprayed at flowering and fruiting stage (45 and 55 DAS) to control shoot and fruit borer.
To study ontogenetic growth characteristics, a total of five harvests were taken in both years. The second and third rows of each plot were used for sampling. The first crop sampling was done at 25 DAS, and continued at an interval of ten days up to 65 DAS, that is, till attaining physiological maturity. From each sampling, a unit area of 0.3 m2 in two adjacent rows of 0.5 m (10 plants) was randomly selected from each plot and uprooted for collecting necessary parameters. The plants were separated into roots, stems, leaves, and pods, and the corresponding dry weight was recorded after oven-drying at 8 0 ± 2°C for 72 hours. The leaf area of each sample was measured by automatic leaf area meter (Model: LICOR 3000, USA). The growth analyses like crop growth rate (CGR), relative growth rate (RGR), and net assimilation rate (NAR) were carried out following the formulae of Hunt. The number of opened flowers plant−1 was recorded from 15 randomly selected pants, that is, five from each plot. The opened flowers were counted daily. Reproductive efficiency (per cent pod set to opened flowers) was calculated as follows: (number of pods plant−1 ÷ number of opened flowers plant−1) × 100. The yield contributing characters were recorded at harvest from ten competitive plants of each plot. The seed yield was recorded from five rows of each plot (1 . 5 0 m × 3 . 0 m) and converted into seed weight plant−1 by dividing the plant number. Harvest index was calculated from the collected data using formula: (economic yield plot−1 ÷ biological yield plot−1) × 100.
Data were analyzed statistically as per the design used following the analysis of variance (ANOVA) technique and the mean differences were adjusted with DMRT at 5% level of significance using the statistical computer package programme, MSTAT-C following Russell.
The Scientific World Journal, Volume 2012 (2012), Article ID 425168, 7 pages
Journal