ABSTRACT
Soil, taken from lake bottom and river bed, the selective sources of top soil construction in land reclamation, need to be improved with their properties in general. Biochar can be used to improve some soil quality. In this research, produced five different kinds of straw biochar at corresponding pyrolysis temperatures respectively and used 3 added levels into 2 kinds of soil followed seeding ryegrass to check alteration of soil quality. After the application of biochar, it decreases soil chroma with 1–3 units in sandy soil and 1–4 units in clay soil. Electrical Conductivity (EC) of soil is increased significantly and pH of soil is moderated after 30 days plantation of ryegrass. In the addition of biochar, MSA increases significantly but doesn’t change WSA significantly. Furthermore, ryegrass planted soils was promoted significantly in height. It conclude that the production of different types biochars must be relating to enhancement of soil properties through specific pyrolysis conditions and soil types.
