The Mexican non-toxic Jatropha curcas is a promising biofuel and food resource that would satisfy energetic demands, however, is not as well known as the toxic genotype.

1. International Conference on JATROPHA CURCAS 2010
Groningen, The Netherlands
November 1-2, 2010
Soil texture effects on development
of non-toxic piñón (Jatropha curcas
L.) seedlings
O. A. Valdés Rodríguez, Sánchez-Sánchez,
Pérez-Vázquez, Ruíz-Bello

2. Contents

Introduction

Jatropha curcas non-toxic



Soil requirements


Origens and distribution
Uses in México
What is promoted
Our research





Objectives
Hypothesis
Methodology
Results
Conclusions

3. Jatropha curcas non-toxic

Origins and distribution
Non-toxic
Toxic
Disemination (Heller, 1996)

4. Piñon manso traditional uses
Live fenses
 Skin deceases
 Traditional dishes


5. Soil texture requirements
What is promoted
 High potential
Sandy
 Sandy-Loam


Low potential

Clay

6. Research
Objective

To determine the effects of different soils over
development and growth of root and shoot of
non toxic J. curcas seedlings.

7. Research

Hypothesis

Ho: Jatropha curcas seedlings growth is the
same in sandy, sandy-loam, and clay-loam
textures

Ha: Jatropha curcas seedlings growth is
different in sandy, sandy-loam, and clay-loam
textures

8. Methodology

Site and conditions

Southeasth México
19° 16' 00" N and 96° 16' 32" W
 18 m altitude


Natural conditions
 Temperature:
19.8 ºC - 40.2 ºC
 Humidity: 63.2%

9. Methodology

Biological material:
Non-toxic seeds
 Location: 18º 59’52” N, 96º
15’ 31” W, 17 mosl
 Physical data

 Weight:
742.0 mg ± 24.3 mg
 Length: 18.55 mm ± 0.68 mm
 Width 10.3 mm ± 0.30 mm
Weight, Distribution: Normal
180
160
140
120
100
80
No. of observations
60
40
20
0
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
1,1
1,2

10. Methodology

Experimental design
Treatments
Age (days)
Sandy
D1
D30
Sandy-Loam
D1
D30
Clay-Loam
D1
D30

11. Results

Soil analysis
Table 1. Soil chemical analysis and the method used for each test
Soil type
pH
Organic matter
(%)
Total N (%)
P (ppm)
Method
Potentiometer
Walkley-Black
N=O.Mx0.05
Olsen-Kitson
Mellon
7.81
Not detected
Not detected
2.8
(slightly alkaline)
(very low)
(very low)
(low)
Sandy
7.26
Clay-loam
1.824
0.0912
(medium)
(low)
(medium)
3.397
0.1698
(high)
(high)
(high)
Diehl et al.
Diehl et al.
3.859
7.717
8.770
14.733
16.487
25.958
34.0
(slightly alkaline)
Mg
(me/100g)
14.0
(Neutral)
7.43
Sandy-loam
Ca
(me/100g)

12. Results

Root collar diameter and heights

13. Results

Morphologycal parameters
S te m V o lu m e
N u m b e r o f tru e le a ve s
18000
N u m b e r o f b ra n c h e s
2 ,5
16000
8
14000
2 ,0
10000
8000
Num ber
6
Num ber
V o lu m e (m m 3 )
12000
4
1 ,5
1 ,0
6000
4000
2
0 ,5
2000
0
0
Sandy
S a n d y-L o a m C la y-L o a m
0 ,0
Sandy
S a n d y-L o a m C la y-L o a m
Sandy
S a n d y-L o a m C la y-L o a m

14. Results

Dry mass
a ) S te m d ry m a s s
b ) R o o t d ry m a s s
3 ,0
b ) R o o t d ry m a s s
1 ,6
1 ,6
1 ,4
1 ,4
1 ,2
1 ,2
W e ig th (g )
2 ,0
1 ,5
1 ,0
R o o ts w e ig th (g )
R o o ts w e ig th (g )
2 ,5
1 ,0
0 ,8
0 ,6
1 ,0
0 ,8
0 ,6
0 ,4
0 ,4
0 ,2
0 ,2
0 ,0
0 ,0
0 ,5
0 ,0
Sandy
S a n d y-L o a m C la y-L o a m
Sandy
S a n d y-L o a m C la y-L o a m
Sandy
S a n d y-L o a m C la y-L o a m

15. Conclusions
Best growth on sandy-loam textures
 Lowest growth on sandy textures
 Clay-loam → Highest number of branches

Clay-loam
Sandy-loam
Sandy