Species diversity of insects, soil invertebrates and chemical properties in an organic farm in Hua Ngua village, Kud Sai Jor sub-district, Kantarawichai district, Maha Sarakham province

Abstract

This research aims to study diversity of insects, invertebrates, and  chemical property in soil in agricultural area. Study fieldwork was organic farms in Hua Ngua village, Kud Sai Jor sub-district, Kantara Wichai district, Maha Sarakam province. Information of insects, invertebrates and chemical property were collected once a month from April to December of 2014. Data collected was used to analyze frequency of occurrence, species diversity and evenness index. The result showed that there are two phyla of invertebrates found. The first one was Annelida; 1 class, 1 order and 1 species found. The second one was Arthropoda; 4 class, 13 order, and 43 species found, respectively. The diversity index was 3.33 and evenness index was 0.88. Chemical property analysis showed the number of potentials of Hydrogen ion, percentage of organic matter, percentage of Nitrogen, extracted Phosphorus (ppm) and extracted Potassium (ppm) at 6.22±0.35, 0.83±0.08, 0.04±0.01, 41.11±4.86 and 63.67±7.45, respectively.

   Diversity index of invertebrates raised up to the top at 3.22 in July with numbers of kinds of earthworm, spiders, centipedes, and millipedes found. Chemical property analysis also expressed that organic matter, extracted Phosphorus, and extracted Potassium were all the highest of the 9-months graph in July were 0.86, 48 ppm, and 74 ppm, respectively.