The Effect of Organic Biomass Application to Diversity of Detritus Arthropods and Natural Enemies in Rice Field

摘要

The aims of this research are to describe the effect of adding organic biomass (which are Azolla, straw and organic fertilizer) to the diversity of detritus arthropods and natural enemies, and to analyze the dissimilarity of habitat in each treatment's field and to define the improvement of agro-ecosystem toward treatments. Fieldwork was conducted in Watugede of Singosari, Malang regency. Four areas of the rice field were chosen from an overlay as the site for each treatment. We used both direct sampling and baiting to collect arthropods. For baiting, pitfall trap was used. For direct sampling, we take soil samples then placed in berlesse-tullgren funnel. Data converted to a and p diversity. Analysis of variance was used to ensure any improvement between habitats. The results show that adding certain biomass at the beginning of the agricultural system will enhance the population and diversity of detritus arthropods. It's also enhancing natural enemy's diversity. Adding organic fertilizer has the biggest impact. There was an improvement of habitat in the treatments fields. The improvement conies from the higher possibility to gain ecological services. Adding biomass also enhances agro-ecosystem health according to the occurrence of richness-dominance covariance.