Effect of Biogas Effluent from Durian Shell and Seed Combined with Chicken Manure on Soil Chemical Property, Growth and Nutrient Concentrations of Marigolds (Tagetes erecta)
The objective of this research was to study the effects of biogas effluent from durian shell and seed combined with chicken manure on soil chemical property, growth and nutrient concentration of marigolds. The experimental design was a Completely Randomized Design with six treatments and 4 replications consisted of water (T1), biogas effluent: water ratio of 1:9 (T2), biogas effluent: water ratio of 1:7 (T3), biogas effluent: water ratio of 1:5 (T4), biogas effluent: water ratio of 1:3 (T5) and the recommended chemical fertilizer rate (T6). The experiment was conducted at the Faculty of Agricultural Technology in Rambhai Barni Rajabhat University. The data on plant height, stem diameter, bush diameter and SPAD were collected every week. The number, diameter, fresh and dry weights of marigold flowers at the time of blooming were monitored daily. The pH and electrical conductivity (EC) of soil, chlorophyll concentration of leaves, fresh and dry weights of roots, branches and leaves and nutrients concentrations of plant were measured at the end of the experiment.
