Design And Development of Biodegradable Sawdust Nursery Trays

Abstract

The objectives of this research are 1) to study the process of forming seedling trays from sawdust using wet starch glue as a binding material 2) to design seedling trays suitable for use 3) to produce seedling trays. Seedlings must be in accordance with community industrial product standards. A total of 6 experimental methods were used in different mixing ratios by weight. Formed using a hydraulic press. Study the physical characteristics of the seedling trays after being removed from the mold. Study properties and test for deterioration The method of collecting data was from a sample of 12 farmers who produced seedlings in Hankha District, Chainat Province, and in-depth interviews with a sample of 5 entrepreneurs using a specific random sampling method. Using statistics to analyze the data, it was found that 1) the molding process for experimental set A06, which had a mixture ratio of wet starch glue : sawdust 60 : 40, was the most moldable. Can be formed into full leaves. 2) Entrepreneurs have a need for nursery trays of standard rectangular shape and size and when considering the chemical characteristics of the raw materials It has an appropriate pH value for plant growth. 3) Physical characteristics and properties according to community industrial product standards were found to be durable, harmonious, not cracked, have a smooth, uniform brown surface, and have a size of 5 cm at the top and 5 cm at the bottom. 4 centimeters, height 5 centimeters, thickness 0.5 centimeters, weight 246.66 grams and has a humidity value of 25.94 ±1.43, a water absorption value of 66.79±5.56%, a swelling value of 7.38±0.85%, a porosity value of 6.46±1.66%. Able to absorb water well It has the slowest deterioration.