soil texture effects on development of non toxic piñón

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 2010

Groningen, 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 fenses

Skin deceases

Traditional dishes

Soil texture requirements

What is promoted

High potential

Sandy

Sandy-Loam

Low potential

Clay

Research

Objective

To determine the effects of different soils over

development and growth of root and shoot of

J. curcas non toxic seedlings.

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

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%

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

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

Clay-Loam

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.Mx0.05

Olsen-Kitson

Mellon Diehl et al. Diehl et al.

Sandy 7.81

(slightly alkaline)

Not detected (very low)

Not detected (very low)

2.8 (low) 3.859 7.717

Sandy-loam 7.26

(Neutral)

1.824 (medium)

0.0912 (low)

14.0 (medium) 8.770 14.733

Clay-loam 7.43

(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

Nu

mb

er

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

Nu

mb

er

0,0

0,5

1,0

1,5

2,0

2,5

Results

Dry mass a) Stem dry mass

Sandy Sandy-LoamClay-Loam

Weig

th (

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

eig

th (

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

eig

th (

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 textures

Lowest growth on sandy textures

Clay-loam → Highest number of branches

Clay-loam Sandy-loam Sandy