Experimental Site
The experiment site was the farm of Olericulture Division, Bangladesh Agricultural Research Institute (BARI) during November 2019 to March 2020. The field was at 23.99020"N Latitude and 90.41025"E Longitudes, while the elevation was 8.2 m from sea level and situated under the agro-ecological zone (AEZ) 28. The site was situated in the sub-tropical climatic zone with scanty rainfall during the time. The average maximum and minimum temperature were 28.30C and 18.40C and the average relative humidity varied from 54.20% to 74.60%. The soil was sandy clay loam having a pH around 6.0.
Treatments and Plant Materials
Three types of much paper viz., Silver over black (M1), Black (M2), No much-Control (M3) and 4 types of vegetables viz., tomato (BARI Tomato-15), brinjal (BARI Hybrid Begun-4), capsicum (BARI Mistimorich-1) and broccoli (BARI Broccoli-1) were planted under UV stabilized polyethylene film net house. The Experiment was laid out with three replications.
Land Preparation and Fertilization
The unit plot size was 3.0 × 1.00 m in a RCBD (Randomized Complete Block Design) with three replications. Row to row and plant to plant distance was maintained with standard practice. The land was fertilized with organic fertilizer-N-P-K-S-Zn-B @ 10,000-170-50-125-18-4.3-1.70 kg/ha, respectively. One third of the organic fertilizer and half of TSP and full of gypsum, zinc and borax were applied during final land preparation. Rest of organic fertilizer and TSP and 1/3 of MoP were applied as basal in pit. After land preparation, the land was covered with mulch paper. Then the proper sized seedlings were transplanted with proper distance. One third of urea and MoP were applied in liquid form after 20 days of transplanting in the hole where the plant is standing. Rest of urea and MoP was applied in equal two installments at flowering and fruiting condition.
Data Recorded
Different types of yield and yield contributing data of 4 types of vegetables viz., tomato, brinjal, capsicum and broccoli were collected from 5 randomly selected plant from each of replication.
For tomato the traits were—plant height (cm), days to first flowering, days to first harvest, fruit length (cm), fruit breadth (cm), number of fruits/plants, average fruit weight (g), yield/plant (kg), yield (t/ha) and TSS (%).
For brinjal the traits were—plant height (cm), days to first flowering, days to first harvest, fruit length (cm), fruit breadth (cm), number of fruits/plants, average fruit weight (g), yield/plant (kg) and yield (t/ha).
For capsicum the traits were—days to first harvest, fruit length (cm), fruit breadth (cm), number of fruits/plants, average fruit weight (g), yield/plant (kg) and yield (t/ha).
For broccoli the traits were—days to 50% curd initiation, days to curd harvest, curd length (cm), curd breadth (cm), whole plant weight (kg), only curd wt. (g), marketable curd wt. (g), marketable curd yield (t/ha).
Statistical Analysis
The recorded data for different characters were analyzed statistically using MSTAT-C program to find out the variation among the different genotypes by F-test. Treatment means were compared using Tukey’s test and standard error and coefficient of variation (CV %) were also estimated for each character.