Grow Better Blackberries with Haifa products

Leaf analysis standards

Sample: 50 recently-matured leaves with petiols

Timing: initial flowering

Excess

Normal

Deficiency

Nutrient

>4%

3-4%

2.3-2.49%

N

>0.5%

0.3-0.5%

0.2-0.29%

P

>3.5%

2.5-3.5%

1-1.49%

K

>1.5%

0.5-1%

0.6-0.79%

Ca

>0.4%

0.3-0.4%

0.25-0.29%

Mg

>0.6%

0.3-0.6%

<0.29%

S

 

Excess

Normal

Deficiency

Nutrient

>50 ppm

50 ppm

<50 ppm

Fe

>50 ppm

50 ppm

<50 ppm

Mn

>20 ppm

20 ppm

<20 ppm

Zn

>7 ppm

7 ppm

<7 ppm

Cu

>50 ppm

30-50 ppm

<50 ppm

B

 

Nutrients consumption dynamics of blackberries

 

K application rates

General guidelines for K application by fertigation

Multi-K Kg/ha

Recommended rate ( K2O kg/ha)

Share of K2O at stage (%)

Stage

65

30

15

Leaf emerence

87

40

20

Flowering

109

50

25

Fruit set

109

50

25

Fruit growth

65

30

15

Fruit maturation

435

200

100

 

 

N deficiency

 

 

Deficiency symptoms

Nutritional requirements 

Estimated yield

(ton/ha)

N

P

K

Ca

Mg

S

Fe

Cu

Mn

Zn

B

kg/ha

g/ha

5

29

6

34

11

15

12

86

20

191

41

60

10

57

12

68

21

29

24

171

40

382

81

120

15

86

18

102

32

44

35

257

60

573

122

180

20

114

24

136

42

59

47

342

80

764

161

240

 

N, P and K demand throughout the season, blackberry var. Tupi under intensive production (Oseguera and Sánchez, Mexico, 2015)   

Growth stage

Nitrogen 

phosphorus

Potassium

----------------------  %  -----------------------

Vegetative - before defoliation

18

12

16

After defoliation - sprouting

23

22

24

Sprouting - flowring

4

24

26

flowring - fructification

55

42

34

Total

100

100

100