01/09/111

Effect of ozone contentration on N、 P 、

K in the soil and wheat plant

Zhang Xian C he n

Yang Zho u U n ive rs ity

01/09/112

Main content

ⅠⅠ .Material and Method.Material and Method

ⅡⅡ .Result.Result1. Effect of ozone contentration on effective N1. Effect of ozone contentration on effective N 、 、

PP 、、 K in the cornfield soilK in the cornfield soil

2. Effect of ozone contentration on N2. Effect of ozone contentration on N 、、 PP 、、 K in the K in the wheat plant before mature periodwheat plant before mature period

3. Effect of ozone contentration on N, P, K in the 3. Effect of ozone contentration on N, P, K in the maturmature wheat plant tissuese wheat plant tissues (not including the root)(not including the root)

01/09/113

Ⅰ.Material and Method Material : winter wheat(扬麦 14) Method : O3-FACE（Ozone-Free Air Concentration

Enrichment） (O3 concentratioan target at 50% above ambient)

Test indexes : effective nitrogen (NO3--N and

NH4+-N) , effective phosphorus, effective

potassium in cornfield soil and the N, P, K in wheat plant.

Sampling time : seedling stage (2009 December 16),jointing stage (2010 March 11), heading stage (2010 April 16), filling stage (2010 May 11) ,maturity stage(2010 June 2)

01/09/114

Ⅱ.Result：1. Effect of ozone contentration on effective N, P, K in the cornfield soil Effect of elevated O3 on

ammonium nitrogen, nitrate

nitrogen in the cornfield soil The nitrogen trend in the soil of FACE is

basically similar with Ambient, Before the filling stage are decreasing. After the ozone treatment, the content of ammonium nitrogen in soil is reduced before maturity,In maturity, the soil content of ammonium nitrogen have increased than no treatment;

By ozone treatment,soil nitrate nitrogen content increased in the seedling stage and the maturity stage, decreased in other stage.

NH4+-N

0

5

10

15

20

(09)12–16 3–11 4–16 5–11 6–7

TIME（month-day）

Conc

entr

ation

mg/k

g

Ambient

FACE

NO3--N

0

5

10

15

20

25

30

35

(09)12–163–11 4–16 5–11 6–7

TIME（month-day）

Conc

entration mg/k

g

Ambient

FACE

01/09/115

Effect of elevated O3 on effective phosphorus, effective potassium in the cornfield soil

1)After ozone treatment, the effective phosphorus were significantly increased. Before the maturity stage, in the treatment and non- treatment phosphorus′ change is similer,In the mature stage, after the ozone treatment, the available phosphorus content of cornfield soil is much higher than the levels of ambient soil.

2) After the ozone treatment,effective potassium content in soil increased in the seedling and jointing stage,;from the heading stage, the content of potassium in soil lower than the non-treatment.

Effective potassium

0

10

20

30

40

50

(09)12–16 3–11 4–16 5–11 6–7

TIME（month-day）

Concentration mg/kg

Ambient

FACE

Effective phosphorus

0

5

10

15

20

25

(09)12–16 3–11 4–16 5–11 6–7

TIME（month-day）

Concentration mg/kg

Ambient

FACE

01/09/116

ⅱ2.Effect of ozone contentration on N, P, K in the wheat plant before mature period

nitrogen (N)1 ） The nitrogen content of wheat

plant changed similer between FACE and Abient. After the ozone treatment, the nitrogen content of wheat plant increased in the three stages 。

N

0

2

4

6

8

10

12

3–11 4–16 5–11

TIME（month-day）

Concentration

mg/kg ■ FAC E

01/09/117

phos phorus ( P)

2) After ozone concentration increase, phosphorus in plant body didn′t have obvious difference 。

potas s ium ( K)

3） After ozone treatment,potassium levels increased in the jointing stage, other stages reduced.

P

0

0.5

1

1.5

2

2.5

3

3–11 4–16 5–11

TIME（month-day）

Concentration

mg/kg

Ambient

FACE

K

0

5

10

15

20

3–11 4–16 5–11

TIME（month-day）

Concentration

mg/kg

Ambient

FACE

01/09/118

3. Effect of elevated O3 on the distribution of N,P,K in mature wheat

plants (not including the root) nitrogen (N) From the graph, after

ozone concentration increased , N content is lower than Ambient in all wheat plant organizations

N

0

2

4

6

8

10

12

straw kernel shell

6-7（month-day）

conc

entr

atio

nmg

/kg Ambient

FACE

01/09/119

phosphorus (P) After ozone concentration

rise,P added in wheat straw and kernel, phosphorus content in wheat shell decreased.

potassium (K) After ozone concentration

rise, K increased in wheat kernel, and achieve high significant level(p < 0.01), decreased in wheat straw and shell.

P

0

0.5

1

1.5

2

2.5

3

straw kernel shell

6-7（month-day）

concentration

mg/kg

Ambient

FACE

K

0

2

4

6

8

10

straw kernel shell

6-7（month-day）

concentration

mg/kg

Ambient

FACE

01/09/1110

THANK YOU!

谢 谢

01/09/1111

01/09/1112

O 3