A K M Ariful Hoque
Scientific Officer
Regional Horticulture Research Station, Bangladesh Agricultural Research Institute (BARI), Shibpur, Narsingdi-1602, Bangladesh
Quazi Maruf Ahmed
Scientific Officer
Regional Horticulture Research Station, Bangladesh Agricultural Research Institute (BARI), Shibpur, Narsingdi-1602, Bangladesh
Md. Moshiur Rahman
Senior Scientific Officer
Regional Horticulture Research Station, BARI, Shibpur, Narsingdi-1602, Bangladesh
Md. Ashraful Islam
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.
Flower initiation, Napthalene acetic acid, Specific leaf weight, Medium styled flower, Brinjal
Regional Horticulture Research Station, Shibpur, Narsingdi
Crop-Soil-Water Management
The experiment was conducted at the research field of Regional Horticulture Research Station, Shibpur, Narsingdi during the rabi season (October to March) of 2016-2017. The experiment was laid out in Randomized Complete Block Design (RCBD) with five treatments NAA (NAPTHALENE ACETIC ACID ) was sprayed days after transplanting (DAT) and also considering the flower initation stage (FIS) of brinjal viz.T0 = Distilled water spray (control), T1 = Spraying at 15 DAT days interval after transplanting, T2 = Spraying at 15 DAT and at 1st FIS. T3= Spraying at 15 DAT and then thrice spray at 15 days interval starting from 1st FIS, T4 = One spray before 7 days of first FIS and thrice spary at 7 days interval starting from 1st FIS, T5 = One spray before 15 days of 1st FIS and thrice spray at 15 days interval starting from 1st FIS. The used concentration of NAA was 40 ppm. The unit plot size consisted of two plots each measuring 5.6 m2 (5.6 m x 1.0 m) with 8 plants. Therefore, each unit plot occupied 16 plants. Forty two day old seedlings (4 leaf stages) were transplanted on 05 December, 2016 with spacing 100 cm row to row and 70 plant to plant distances. Cowdung, Urea, TSP, MoP, Sulphur, Boron and magnesium were applied @ 15 t, 375, 150, 250, 10, 1.5, 2 kg/ha. The entire quantity of cowdung, TSP, sulphur, and half of MoP were applied during land preparation The remaining half of MoP and eatire urea were applied in three equal installments at 20,40 and 60 days after transplanting. Insecticides were sprayed when required. Irrigation was given to the plant at 15 days interval after transplanting. Weeding was done as and when necessary. Fruit harvest started at March 03, 2017 and continued to June 14, 2017. The data were recorded on plant height at last harvest, number of leaves/plant, leaf area/plant, specific leaf weight, chlorophyll content index (CCI), Fv/Fm, percent of long styled flower, percent of medium styled flower, dry matter accumulation of plant, number of fruits/plant, fruit set percent, single fruit weight, fruit yield/plant. The yield of/plot was converted ton per ha. Data on CCI (Chlorophyll Content Index) was taken by Chlorophyll Content Meter (Model: CCM-200, Opti-sciences,USA) at 50 days after planting at the third leaf from tip. Leaf area (cm2) was measured by Leaf Area Meter, CL-202, CID, INC. The changes in fluorescence yield reflect changes in photochemical efficiency and heat dissipation. The polyphasic rise of fluorescence transients was measured by an ADC Infrared Gas Analysis plant Efficiency Analyzer (PEA, Handsatech Instruments Ltd.,King’s Lynn, UK). The leaf discs were previously adapted to the dark for 20 minutes. The fluorescence data were collected at 10.00 a.m to 2.00 p.m at 50 days after transplanting. F0 is the amount of light absorbed initially to raise the fluorescence from a low level to maximum value Fm after dark adaptation. Fv = Fm-F0 which is the variable. Ratio of Fv/Fm is a dark adapted test used to determine maximum quantum yield. This ratio is also an estimate of the maximum portion of absorbed quanta used in PS II reaction centers. Collected data were statistically analyzed (Gomez and Gomez, 1983) and means were separated by DMRT by using MSTAT-C program.
Res. Agric. Livest. Fish. Vol. 5, No. 2, August 2018 : 151-155
Journal