scholarly journals Die subletale effekte van die organochloriede dieldrien en lindaan op groei en voortplanting van Eudrilus eugeniae en Eisenia fetida (Oligochaeta)

1994 ◽  
Vol 13 (1) ◽  
pp. 21-24 ◽  
Author(s):  
Editorial Office

Experimental exposure of the earthworm species Eudrilus eugeniae to organochlorines showed that dieldrin causes damage to sperm ultrastructure when viewed electronmicroscopically. Worms containing concentrations of 7,27 mg/kg dieldrin and higher showed more than 10% sperm damage. Exposure of Eisenia fetida to sublethal concentrations of lindane did not result in sperm damage but demonstrated an increase in growth and reproductive activity. It is argued that quantification of sperm damage and correlation with pesticide concentration could provide a useful tool for evaluating environmental quality. Furthermore, the effects of sublethal concentrations of pesticides that manifest themselves in increased growth and reproductive activity could affect ecological balances.

2014 ◽  
Vol 27 ◽  
pp. 54-60 ◽  
Author(s):  
Sharanappa Padashetty ◽  
Murali Jadesh

A preliminary survey on earthworm species from north Karnataka region, Gulbarga district, Karnataka state, India, has been conducted from January 2012 to December 2013. Survey was conducted in three regions of Gulbarga district i.e. Afzalpur, Chittapur, and Sedam taluk. Six species of earthworms were identified belonging to four families namely lumbricidae, Octochaetidae, Megascolecidae and Eudrilidae. Eisenia fetida belonging to family lumbricidae, Dichogaster bolaui belong to family Octochaetidae, Polypheretima elongate, Perionyx sansibaricus and Perionyx excavates belong to family Megascolecidae and Eudrilus eugeniae belonging to family Eudrilidae. Among the species, Eudrilus eugeniae does not occur naturally and are produced from external sources for vermicomposting units.


2010 ◽  
Vol 2010 ◽  
pp. 1-13 ◽  
Author(s):  
Swati Pattnaik ◽  
M. Vikram Reddy

Major nutrient status of vermicompost of vegetable market waste (MW) and floral waste (FW) processed by three species of earthworms namely,Eudrilus eugeniae, Eisenia fetida, andPerionyx excavatusand its simple compost were assessed across different periods in relation to their respective initiative substrates. Their physical parameters—temperature, moisture, pH, and electrical conductivity—were also recorded. The nutrients—nitrogen, phosphorus, potassium, calcium, and magnesium—increased in the vermicompost and compost while the organic carbon, C/N and C/P ratios decreased as the composting process progressed from 0 to 15, 30, 45, and 60 days. The nutrient statuses of vermicomposts of all earthworm species produced from both the wastes were more than that of the compost and that of their respective substrates. Moreover, the vermicompost produced byE. eugeniaepossessed higher nutrient contents than that ofE. fetida, P. excavatus, and compost. The MW showed higher nutrient contents than the FW. Thus, vermicomposting is the paramount approach of nutrient recovery of urban green waste.


2020 ◽  
Vol 23 (2) ◽  
pp. 99-104
Author(s):  
Agus Mulyadi Purnawanto ◽  
Yugi R. Ahadiyat ◽  
Achmad Iqbal ◽  

AbstractThe objective of this study was to determine the capacity of Lumbricus rubellus, Eisenia fetida and Eudrilus eugeniae earthworms in vermicompost production utilizing mushroom waste substrate based on weight; number and weight loss of earthworms; temperature; pH; moisture content of media; and C/N ratio. The results showed that, by using 42 g of E. eugeniae, E. fetida and L. rubellus earthworms, there was an increase in weight of earthworms and vermicompost by more than 300% and 75%, respectively. In general, these three species of earthworms were able to produce vermicompost in compliance with quality standards, showing C/N ratio lower than 20.


2013 ◽  
Vol 5 (2) ◽  
pp. 451-454
Author(s):  
N. Kannadasan ◽  
Nirmala Natarajan ◽  
N. Anbusaravanan ◽  
P. Sekar ◽  
R. Krishnamoorthy

The present work has assessed sustainable vermiconversion of aquatic weed water hyacinth (Eichornia crassipes). The garden soil, water hyacinth and cow dung were taken in the following the combinations of 1: 2 : 1, 2: 1: 1 and 1 : 1: 2. Two species of earthworms Eudrilus eugeniae and Eisenia fetida was used for the experiment. The total nitrogen (0.18% in control and 1.68% in earthworm treated) and phosphate (0.63 % in control and 1.64 % in earthworm treated) levels were increased and toxic heavy metals zinc (7.66 ppm in control and 2.58 ppm in earthworm treated) and copper (6.68 ppm in control and 1.15 ppm in earthworm treated) were significantly decreased. The earthworm enriches the compost with various nutrients for plant and microbial growth. Plant growth studies were conducted in all the combination of water hyacinth, maximum growth of root length (8.9cm and 7.2 in control) and shoot length (21.6cm and 16.2 in control) observed compare to control. Gut microbial analysis revealed that Bacillus cereus, Micrococcus luteus were predominantly present in the earthworm. The study recommended that the aquatic weed compost was suitable of agricultural usage.


Geoderma ◽  
2019 ◽  
Vol 335 ◽  
pp. 88-93 ◽  
Author(s):  
Yali Wang ◽  
Hao Tang ◽  
Cory Matthew ◽  
Jiangping Qiu ◽  
Yinsheng Li

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