The earthworm’s diversity and their relationship to the soil physicochemical properties under the stands of perennial plant at the Mount Merapi forest, Yogyakarta, Indonesia

Abstract

Abstract. Minarsih S, Hanudin E, Nurudin M. 2021. The earthworm’s diversity and their relationship to the soil physicochemical properties under the stands of perennial plant at the Mount Merapi forest, Yogyakarta, Indonesia. Biodiversitas 22: 3237-3244. The study was to propose earthworm as bioindicator and its correlation to the soil physicochemical properties underneath some perennial plants. Soil samples and earthworm observation was taken out at a depth of 0-10 cm and 10-20 cm under the stands of Acacia decurrens, coffee, Albizia chinensis, bamboo, snake fruit, and Acacia mangium. Soil moisture, temperature and Physico-chemical properties were measured, such as texture, pH, organic C, mineralized C, total N, mineralized N, available P, and base cations (Ca, Mg, K, Na). The results revealed that the earthworms density underneath of the stands of coffee was 105.4 ind.m-2 > snake fruit 92.6 ind.m-2 > Albizia chinensis 66.7 ind.m-2 > A. decurrens ? bamboo 40.7 ind.m-2 > A. mangium 37.0 ind.m-2. The dominant species of the earthworms found at a depth of 0-10 cm consisted of four species, namely: Pheretima hamayana, Pheretima californica, Eudrillus eugeniae, and Eiseniella tetraeda. Meanwhile, the earthworms diversity underneath the stands of coffee was H’=1.26 > A. mangium H’=1.03 > Albizia chinensis H'=0.69 > ?H'=0.69 > bamboo H'=0.59. The soil physicochemical properties was positively correlated to the earthworms density was C-mineralized (r = 0.823) ? soil moisture (r = 0.585) ? available K (r = 0.529) ? available Ca (r = 0.505) ? available Mg (0.494). The results could be concluded that labile organic carbon, water, and alkaline cations were the important factors in improving soil biological fertility in the active volcano area.

PENGARUH PUPUK AEROBIK KOTORAN KAMBING, KOMPOS DAUN DAN UREA TERHADAP PERKEMBANGAN CACING TANAH (Lumbricus rubellus)

“…Dalam hal lingkungan untuk pemakaian pupuk anorganik jangka panjang dan berlebihan dapat merusak lingkungan khusus nya pada lahan dimana dapat mengurangi produktivitas pada tanah dan dapat menyebabkan tanah menjadi mengeras (Yasmi & Sawir, 2020). Sementara ini pupuk kimia yang masih sering kali digunakan oleh para petani adalah pupuk kimia Nitrogen (Minarsih, 2021). Padahal penggunaan pupuk kimia secara terus menerus dalam waktu berkepanjangan dan berlebihan memiliki dampak yang negatif bagi lingkungan dan tanaman, karena pupuk kimia akan menyisakan efek residu yang mana dapat mempengaruhi dan menyebabkan kualitas tanah yang menurun.…”

A Modified Soil Fertility Assessment Method Using Earthworm Density and Microbial Biomass C at Various Land Uses in Wonogiri, Indonesia

“…The earthworm population density of three land uses had a low value with an average of 47 individuals.m -2 is presumably related to low organic matter content and soil moisture, especially in gardens. According to [28], earthworms are likely found more in the fields with the high availability of organic matter in the soil, which enables the earthworms to obtain more food and transform it to become available nutrients for crops and soil microbes. The high availability of nutrients can stimulate the growth of beneficial microbes faster [29].…”