O. A. Valdés Rodríguez, Sánchez-Sánchez, Pérez-Vázquez, Ruíz-Bello

Soil texture effects on development of non-toxic piñón (Jatropha curcas L.)

seedlings

International Conference on JATROPHA CURCAS 2010Groningen, The Netherlands

November 1-2, 2010

Contents Introduction

Jatropha curcas non-toxic Origens and distribution Uses in México

Soil requirements What is promoted

Our research Objectives Hypothesis Methodology Results Conclusions

Jatropha curcas non-toxic

Disemination (Heller, 1996)

Origins and distribution

Non-toxic

Toxic

Piñon manso traditional uses

Live fensesSkin deceasesTraditional dishes

Soil texture requirements

What is promotedHigh potential

SandySandy-Loam

Low potentialClay

Research

ObjectiveTo determine the effects of different soils over

development and growth of root and shoot of non toxic J. curcas seedlings.

Research

HypothesisHo: 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

Methodology

Site and conditionsSoutheasth México

19° 16' 00" N and 96° 16' 32" W18 m altitude

Natural conditionsTemperature: 19.8 ºC - 40.2 ºCHumidity: 63.2%

Methodology

Biological material: Non-toxic seedsLocation: 18º 59’52” N, 96º

15’ 31” W, 17 moslPhysical data

Weight: 742.0 mg ± 24.3 mgLength: 18.55 mm ± 0.68 mmWidth 10.3 mm ± 0.30 mm

Weight, D istribution: Normal

0 ,3 0 ,4 0 ,5 0 ,6 0 ,7 0 ,8 0 ,9 1 ,0 1 ,1 1 ,20

20

40

60

80

100

120

140

160

180

No

. of o

bs

erv

atio

ns

Methodology

Experimental design

Treatments Age (days)

Sandy D1 D30

Sandy-Loam D1 D30

Clay-Loam D1 D30

Results

Soil analysis

Table 1. Soil chemical analysis and the method used for each test

Soil type pH Organic matter (%)

Total N (%) P (ppm) Ca(me/100g)

Mg(me/100g)

Method Potentiometer Walkley-Black N=O.Mx0.05Olsen-Kitson

Mellon Diehl et al. Diehl et al.

Sandy7.81

(slightly alkaline)Not detected

(very low)Not detected

(very low)2.8(low) 3.859 7.717

Sandy-loam7.26

(Neutral)1.824

(medium)0.0912

(low)14.0

(medium) 8.770 14.733

Clay-loam7.43

(slightly alkaline)3.397(high)

0.1698(high)

34.0(high) 16.487 25.958

Results

Root collar diameter and heights

Results

Morphologycal parameters

Number of true leaves

Sandy Sandy-LoamClay-Loam

Num

ber

0

2

4

6

8

Stem Volume

Sandy Sandy-Loam Clay-Loam

Vo

lum

e (

mm

3)

0

2000

4000

6000

8000

10000

12000

14000

16000

18000Number of branches

Sandy Sandy-LoamClay-Loam

Num

ber

0,0

0,5

1,0

1,5

2,0

2,5

Results

Dry massa) Stem dry mass

Sandy Sandy-LoamClay-Loam

Wei

gth

(g)

0,0

0,5

1,0

1,5

2,0

2,5

3,0

b) Root dry mass

Sandy Sandy-LoamClay-Loam

Roo

ts w

eigt

h (g

)

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

1,6

b) Root dry mass

Sandy Sandy-LoamClay-Loam

Roo

ts w

eigt

h (g

)

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

1,6

Conclusions

Best growth on sandy-loam texturesLowest growth on sandy texturesClay-loam → Highest number of branches

Clay-loam Sandy-loam Sandy