Table 2

Effects of NM-103 in the earthworm reproduction test

Test and test start

Test concentration (mg/kg sdm)

Mortality (%)

Biomass per vessel at test start (g) ± SD

Biomass per vessel at test end (g) ± SD

Increase in biomass (%)

Number of juveniles per test vessel ± SD

SD (%)

Effect on reproduction (%)


Test 1 - April 2010

0 (control)

0

3.86 ± 0.22

5.55 ± 0.27

44

365 ± 43

11.8

-

50

0

3.86 ± 0.22

5.51 ± 0.50

44

338 ± 20

5.9

7.4

100

0

3.83 ± 0.27

5.73 ± 0.58

52

372 ± 57

15.3

-1.9a

200

0

3.78 ± 0.38

5.70 ± 0.27

56

343 ± 34

9.9

6.0

Test 2 - January 2011

0 (control)

0

3.65 ± 0.22

5.65 ± 0.26

55

223 ± 15

6.7

-

50

0

3.67 ± 0.33

5.68 ± 0.15

55

240 ± 31

12.9

-7.6a

100

0

3.47 ± 0.27

5.77 ± 0.30

67

252 ± 42

16.7

-13.0a

200

0

3.45 ± 0.13

5.71 ± 0.48

66

233 ± 40

17.2

-4.5a

400

0

3.61 ± 0.22

5.98 ± 0.40

66

237 ± 38

16.0

-6.3a


aNegative values indicate stimulation. sdm, soil dry matter; SD, standard deviation.

Schlich et al. Environmental Sciences Europe 2012 24:5   doi:10.1186/2190-4715-24-5

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