2. 1 Experimental Site On the basis of the potentiality, the experiment had been done at Navogram Farm in Mannan Nagar union which is situated at sadar upazila in, Noakhali 2019 that is fall under the Agroecological Zone (AEZ) 18 i.e. Young Meghna Estuarine Floodplain, annually inundated and fertilized by silt deposit from the Meghna estuary. As it was located in the tropical climatic zone where the average annual temperature is 25.6°C and about 2980 mm precipitation falls annually. The average maximum temperature during September to December is 28.1°C which was suitable for cucumber production at that region in Bangladesh. (Table 1) .The soil of the experimental plots was sandy loam in texture, medium high land and it was moderately alkaline with pH value 7.3 - 8.3 with salinity >2 dS/m, Organic matter 0.64%, Nitrogen 0.04%, Phosphorus 27.27%, Potassium 0.18% individually. Physical and Chemical characteristics of soil in research plots were noted from Soil Resource and Development Institute (SRDI).
2.2 Experimental Materials The material used in the research was Alavy Green variety of cucumber which was collected from the Bangladesh Agricultural Research Institute (BARI). For mulching certainly three types such as black plastic, water hyacinth, rice straw were used. Organic and inorganic fertilizer, pesticide and other materials were collected from Dotterhat Seed Ghor in Noakhali.
2.3 Experimental Design and Treatment The experiment was arranged in Randomized Complete Block Design (RCBD) with three replications. In this experiment, four treatments were considered as following T0 (Control): No mulching T1: Black plastic mulching. T2: Water hyacinth mulching. T3: Rice straw mulching.
2.4 Land Preparation The selected land for the experiment was ploughed at first day of September in 2019 than it was kept open to sun for 4 days prior to further ploughing. Eventually, the land was prepared well by ploughing and cross ploughing followed by well laddering .The unit plots were prepared by keeping l m spacing in between two plots and 50 cm draining channel was dug around the land. There were three pits in every plot. The length and breadth of each pit was 30 cm and 30 cm respectively. Pits were 20 cm depth and 45 cm distance from the border of the plots.
2.5 Seed Sowing and Fertilizers Application The seeds were sown directly in the pit where three seeds were sown in each pit at 2 to 3 cm depth. Different mulching materials were applied after 10 days of seed emergence. Manures and fertilizers applied uniformly in the experimental plots and pits as per following doses in accordance with the recommended dose.
2.6 Intercultural Operations Weeding was done whenever necessary to keep the crop free from weeds. When the seedlings were established, staking was given to each plant. For proper growth and development of the plants the vines were managed upward by hand and with the help of iron rope and nylon net. Light over-head watered were provided with a watering can to the plots immediately after germination of seedlings. The un-mulched plot had to be watered more frequently than the mulch plots.
2.7 Data Collection Length of main vine, no. of lateral branches/ plant, no. leaves/ plant, no. tendrils/plant, no. of flowers/plant, no. of fruits/plant, individual fruit weight, fruit length parameters data were recorded from the experimental plot (from the plant with: Black plastic mulching, Water hyacinth mulching, Rice straw mulching, No mulching and pruning).
2.8 Experimental Design The experiment was laid in the Randomized Complete Block Design (RCBD) with one variety and 4 treatments and the experiment was replicated 3 times.
2.9 Statistical Analysis The recorded data on the different parameters of the study were analyzed statistically using Analysis of Variance (ANOVA) procedure by F test (Gomez & Gomez, 1984) P<0.05 was considered statistically significant.