Production by Lumbricus terrestris (L.)

Lakhani, K. H.; Satchell, J. E.

doi:10.2307/2983

Cited by 75 publications

(26 citation statements)

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“…The life histories of few lumbricid earthworm species have been investigated, and most studies determined the development time of earthworms under laboratory conditions (Andersen 1987;Kale and Bano 1994;Haimi 1990). We are aware of only one study that has investigated the development time of L. terrestris under field conditions (Lakhani and Satchell 1970). Butt et al (1994) found that the time to maturity for L. terrestris hatchlings under optimal laboratory conditions was 30 weeks, while Daniel et al (1996) found L. terrestris grown at 20°C reached maturity in about 10 weeks.…”

Section: Discussionmentioning

confidence: 98%

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Earthworm secondary production and N flux in agroecosystems: a comparison of two approaches

Whalen

Parmelee

2000

Oecologia

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Production was estimated for Aporrectodea spp. and Lumbricus spp. populations in corn agroecosystems with a 5-year history of manure or inorganic fertilizer applications during 1994-1995 and 1995-1996. Earthworm biomass and production were greater in manure than inorganic fertilizer plots, although biomass and production declined by about 50% between 1994-1995 and 1995-1996 due to unfavorable climatic conditions. Production was highest during the spring and autumn when soil temperatures were between 4 and 22°C. Production was higher in Lumbricus spp. than Aporrectodea spp. populations due to greater Lumbricus spp. biomass. Aporrectodea spp. production was 3.47-16.14 g ash-free dry weight (AFDW) m year, while Lumbricus spp. production was 6.09-18.11 g AFDW m year, depending on the fertilizer treatment and the method used to estimate production. However, production estimates from the instantaneous growth rate method were within 27% of the values calculated using the size-frequency method. Nitrogen flux through earthworms was used to estimate efficiency quotients. Net production efficiency (P/A) ranged from 0.64 to 0.76, assimilation efficiency (A/C) ranged from 0.1 to 0.3, and gross production efficiency (P/C) ranged from 0.06 to 0.22. Annual N flux through earthworm populations was higher in manure than inorganic fertilizer plots, and ranged from 2.95 to 5.47 g N m year in 1994-1995 and 1.76 to 2.92 g N m year in 1995-1996. The N flux through earthworms represented an amount equivalent to 16-30% of crop N uptake during 1994-1995 and 11-18% of crop N uptake during 1995-1996. We concluded that the effects of earthworms on N cycling in corn agroecosystems were substantial, and that N flux through earthworms was influenced significantly by fertilizer amendments.

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Section: Discussionmentioning

confidence: 98%

“…The time to maturity for an individual A. tuberculata in the laboratory was estimated to be 300 days (Andersen 1987), while the time to maturity for L. terrestris in a forest ecosystem was estimated to be 2 years (Lakhani and Satchell 1970). We assumed a CPI of 1 for Aporrectodea spp.…”

Section: Lnafdw=lna+b×lnblmentioning

confidence: 99%

Earthworm secondary production and N flux in agroecosystems: a comparison of two approaches

Whalen

Parmelee

2000

Oecologia

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“…For Lumbricus terrestris, growth parameters were estimated from growth curves reported by Butt, Frederickson & Morris (1992 and Butt (1993) ( Table 2). In the field, Lakhani & Satchell (1970) estimated maximum weight at 5-6 25 g; in the laboratory they found values ranging from 8 to 11 g liveweight. Our estimate is inbetween: we use the values obtained at 15'C as a default.…”

Section: Referencementioning

confidence: 98%

“…Since for L. rubellus no values were found, cocoon mortality will be ignored in the model analyses for both species. For L. terrestris juveniles and adults, Lakhani & Satchell (1970) estimated the survival curve under laboratory conditions and found age-dependence. The age-dependent mortality function /t(a) is obtained from the survival function S(a):…”

Section: Mortalitymentioning

confidence: 99%

Assessing the Impact of Pesticides on Lumbricid Populations: An Individual Based Modelling Approach

Baveco¹,

Roos²

1996

The Journal of Applied Ecology

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“…Soil moisture affects the distribution and abundance (Edwards and Lofty 1977), biomass (Lakhani and Satchell 1970), and survival and growth of populations (Dash and Patra 1977;Dash 1978). It is clear from the present results that soil moisture and moisture level at field capacity have direct effects on surface casting.…”

Section: Discussionmentioning

confidence: 99%

Factors affecting the surface cast production by some earthworms of Indian tropics

Krishnamoorthy

1989

Proc. Indian Acad. Sci. (Anim. Sci.)

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Forty one sites in mango gardens located in different districts of southern Karnataka were selected for the study during September 1984. Rate of surface cast production, earthworm density and species composition of each site were recorded and compared in relation to the soil moisture, pH, temperature, organic matter and soil type of each site. Only 19 out of the 41 sites examined showed surface casting. Rate of surface cast production is dependent on soil, pH, temperature, soil type and organic matter content. The bulk density of the soil established a direct linear correlation, and the field capacity of soil, a perfect U-shaped (parabolic) relationship with the rate of surface cast production. Sandy loams had greater species diversity as well as population density than the 'clays, Worms were not found in heavy sands and acid soils. Positive correlations were obtained between organic matter and species diversity or density; other factors were poorly correlated. A positive correlation between the cast output and the relaxed length of the worm was obtained. It is discussed that the field capacity and bulk density of soils are the determining factors for variations in surface cast production.

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Production by Lumbricus terrestris (L.)

Cited by 75 publications

References 0 publications

Earthworm secondary production and N flux in agroecosystems: a comparison of two approaches

Earthworm secondary production and N flux in agroecosystems: a comparison of two approaches

Assessing the Impact of Pesticides on Lumbricid Populations: An Individual Based Modelling Approach

Factors affecting the surface cast production by some earthworms of Indian tropics

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