Md. Moshiur Rahman Riaj
Department of Agronomy, Patuakhali Science and Technology University. Dumki, Patuakhali-8602, Bangladesh.
Md. Emran Hossain
Department of Agronomy, Patuakhali Science and Technology University. Dumki, Patuakhali-8602, Bangladesh.
S. M. Zahid Hassan
Department of Agronomy, Patuakhali Science and Technology University. Dumki, Patuakhali-8602, Bangladesh.
Md. Tariqul Islam
Department of Agronomy, Patuakhali Science and Technology University. Dumki, Patuakhali-8602, Bangladesh.
Akhinur Shila
Department of Agricultural Botany, Patuakhali Science and Technology University. Dumki, Patuakhali-8602, Bangladesh.
A. S. M. Iqbal Hussain
Department of Agronomy, Patuakhali Science and Technology University. Dumki, Patuakhali-8602, Bangladesh.
Nitrogen, Boron, Yield, Mustard
Agronomy Research Field of Patuakhali Science and Technology University (PSTU), Dumki, Patuakhali-8602.
Crop-Soil-Water Management
Nitrogen, Boron, Mustard
The experiment was conducted at the Agronomy Research Field of Patuakhali Science and Technology University (PSTU), Dumki, Patuakhali-8602. The field experiment was conducted during the period from November 2015 to February 2016. The experimental area belongs to the non-calcareous clay soil under the Agro-ecological Zone of the Ganges Tidal Floodplain. The soil of the experimental land belongs to the Barisal series of non-calcareous clay soil but they became more silty in the east and usually have a buried peat layer in the west under the Ganges Tidal Floodplain (AEZ-13). The land was clay loam in texture having a soil pH value of 6, moderate in organic matter content. November 2015 to February 2016 with an air temperature of 15.50 to 30.40 °C with 80 to 87% relative humidity and 9 to 23 mm rainfall. BARI sarisha-14 was used as a plating material in this experiment. BARI sarisha-14 is a new high-yielding variety of mustard developed by the Bangladesh Agricultural Research Institute, Joydebpur, Gazipur. The seeds were collected from the BARI, Joydebpur, Gazipur. The experiment consisted of two factors. Factor- A: Nitrogen (N) doses: 4 doses (N0= Without Nitrogen, N1= 60 kg/ha, N2=90 kg/ha, N3=120 kg/ha). Factor-B: Boron (B) doses: 3 doses, B0= Without Boron, B1=1 kg/ha, B2= 2kg/ha. There were 12 (3 × 4) treatment combinations such as N1B0, N2B1, N0B0, N1B1, N2B0, N3B0, N1B2, N3B1, N0B1, N2B2, N0B2 & N3B2. The experiment was laid out following a randomized complete block design with three replications. An area of 370 m2 (43.5 m × 8.5 m) was divided into three equal blocks and each block was divided into 12 plots for the distribution of 12 treatments randomly. There were 12 unit plots with the size of each unit plot being 3.0 m × 1.5 m. The experimental plot was opened on 5th November 2015, with a power tiller and left exposed to the sun for a week. After one week the land was harrowed, plowed, and cross-plowed three times followed by laddering to obtain good tilth. Weeds and stubbles were removed and finally obtained a desirable tilth of the soil. Finally, the land was prepared on 14th November 2015. The total amount of urea and boron were applied as per treatments recommended and triple superphosphate, muriate of potash, and borax were applied as recommended by FRG, 2012. Bangladesh Agricultural Research Council (BARC) at the time of final land preparation. Urea was applied in three splits. The first dose of urea fertilizer was applied at the time of final land preparation, second and third doses of urea fertilizer were applied at 20 and 45 days after sowing respectively. The seeds of mustard were sown on November 17, 2015, in solid rows in the furrows having a depth of 2-3 cm and as per treatment of plant density. Thinning was done two times; the first thinning was done at 8 days after seedling DAS (Days after seeding) and the second at 15 DAS to maintain optimum plant population in each plot as per the treatment of plant density. Irrigation was provided three times after seed sowing, 20 days before flowering, and 50 days after sowing for pod development for all experimental plots equally. The crop field was weeded before providing irrigation. At the early stage of growth few worms (Agrotis ipsilon) infested the young plants and at a later stage of growth pod borer (Maruca testulalis) invaded the plant. Ripcord 10 EC (cypermethrin; BASF Bangladesh Limited) was sprayed at the rate of 1 mm with 1-liter water two times at 15 days intervals after seedlings germination to control the insects. Five plants from each treatment were randomly selected and marked with a sample card. Plant height, branches plant-1 and leaf area index were recorded from selected plants at an interval of 10 days started from 30 DAS to 60 DAS and at harvest. Harvesting was done when 90% of the siliqua became brown in color. The matured pods were collected by handpicking from each plot. The plant height was measured at 30, 45, 50 and 60 DAS and at harvest with a meter scale from the ground level to the top of the plants and the mean height was expressed in cm. The number of branches plant-1 was counted at 30, 45, 50, and 60 DAS and at harvest from selected plants. The average number of branches plant-1 was determined and recorded. Numbers of a total siliqua of selected plants from each plot were counted and the mean numbers were expressed on a plant-1 basis. Data were recorded as the average of 5 plants selected at random from the inner rows of each plot. The number of seeds siliqua-1 was recorded from randomly selected 10 siliquae at the time of harvest. Data were recorded as the average and expressed in siliqua-1. One thousand cleaned, dried seeds of mustard were counted from each harvest sample and weighed by using a digital electric balance and weight was expressed in gram (g). The seeds collected from 4.5 (3 m ×1.5 m) square meters of each plot were sun-dried properly. The weight of seeds was taken and converted to the yield in t ha-1. The stover collected from 4.5 (3 m ×1.5 m) square meters of each plot was sun-dried properly. The weight of stover was taken and converted to the yield in t ha-1. Harvest index (HI) was calculated from the seed and stover yield of mustard and expressed in percentage. Economic yield (seed weight)/Biological yield (Total dry weight) × 100. The data obtained for different parameters were statistically analyzed to find out the effect of variety and plant density on seed yield and seed quality of mustard. The mean values of all the characters were calculated and analysis of variance was performed by R 3.3.1 with the software package Agricolae. The significance of the difference among the treatment means was separated by Honestly Significant Difference (HSD) at 0.05 level of probability.
International Journal of Natural and Social Sciences, 2018, 5(4): 54-64
Journal