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Table 1 Nitrate-N response in stream water and lower root zone soil drainage water to fertilisation with urea

From: Nitrogen leaching losses from forests in New Zealand

Site details

Fertiliser application rate (kg N ha-1)

Nitrate-N response

Time after application for maximum effect (weeks)

Lysimeter depth (m)

Reference

Location

Soil Group

Stand age at fertilisation (years)

 

Mean nitrateconcentration prior to fertiliser application (mg L-1)1

Mean nitrate concentration after fertiliser application (mg L-1)

Increase in mean nitrateconcentration due to fertiliser(mg L-1)

Maximum nitrateconcentration after fertiliser application (mg L-1)1

Fertiliser N lost to stream or drainage water (kg ha-1)1

   

Stream water

Kinleith Central NI

Pumice

Immature

230

< dl2

-

 

1.2

< 1 (0.33%)

6

 

Leonard (1977)

Motueka Nelson

Brown

Not known

92

0.32-0.56

-

 

0.72

(<0.1%)

2

 

Neary and Leonard (1978)

Motueka Nelson

Brown

Not known

92

0.19-0.26

-

 

0.79

(<0.1%)

7

 

Neary and Leonard (1978)

Lower root zone soil drainage water

Kaingaroa Central NI

Pumice

13

200

< dl

< dl

0

< dl

0 (0%)

-

2.7

Worsnop and Will (1980)

Bottle Lake Canterbury

Recent Coastal sand

2

150

0-2.5

-

-

24

54 (36%)

-

 

Thomas and Mead (1992)

Woodhill Auckland

Recent Coastal sand

03

4507

1.48

8 8

6.6

188

269 (6%)

38

0.6

Smith et al. (1994)

Woodhill Auckland

Recent Coastal sand

04

4507

2.98

128

9.1

258

369 (8%)

98

0.6

Smith et al. (1994)

Woodhill Auckland

Recent Coastal sand

05

4507

1.18

88

6.9

248

289 (6%)

30

0.6

Smith et al. (1994)

Woodhill Auckland

Recent Coastal sand

06

4507

0.88

128

11.2

468

459 (10%)

120

0.6

Smith et al. (1994)

TikitereBay of Plenty

Pumice

9

200

3.14

3.34

0.2

6.15

11.5 (5.7%)

56

1.0

Davis et al. (2012)

Mamaku Bay of Plenty

Podzol

7

200

0.08

2.79

2.71

3.83

28.4 (14.2%)

48

1.0

Davis et al. (2012)

Tarawera Bay of Plenty

Recent

9

200

0.06

0.25

0.19

0.53

1.7 (0.8%)

-

1.0

Davis et al. (2012)

Waimarino Wanganui

Allophanic

8

200

0.03

1.44

1.41

2.54

12.1 (6.0%)

37

0.9

Davis et al. (2012)

Karioi Wanganui

Allophanic

8

200

0.04

0.03

-0.01

0.05

0 (0%)

-

1.0

Davis et al. (2012)

Bulls Manawatu

Brown Coastal sand

8

200

2.00

37.31

35.31

81.0

90.8 (45.4%)

29

1.0

Davis et al. (2012)

Ashley Canterbury

Pallic

9

200

0.32

11.20

10.88

39.3

15.2 (7.6%)

10

0.8

Davis et al. (2012)

Eyrewell Canterbury

Brown

7

200

3.19

2.70

-0.49

2.70

0.2 (0.1%)

17

0.6

Davis et al. (2012)

Otago Coast

Brown

8

200

0.05

0.14

0.09

0.43

0.2 (0.2%)

-

1.0

Davis et al. (2012)

Catlins Otago

Brown

8

200

0.18

3.73

3.55

6.47

10.3 (5.1%)

21

1.0

Davis et al. (2012)

  1. 1Total fertiliser N lost as a percentage of added N is shown in parenthesis.
  2. 2 Less than detection limit.
  3. 3 stem only harvest.
  4. 4 stem only harvest, double slash returned.
  5. 5 whole tree harvest.
  6. 6 whole tree harvest and forest floor removed.
  7. 7 50 kg ha-1, 3-monthly for two years.
  8. 8values estimated from graphs in Smith et al. (1994).
  9. 9values estimated assuming drainage equals one third of precipitation.