Effects of solution extracted from vermicompost

Repor ter :Liuping Major :plant

nutrient

Introduction

Vermicompost is the product of organic solid waste , digested by ear thworms, with the advantage of high porosity, f ine ventilation and drainage per formance ,as well as strong water retection capacity .

Aim to provide a technical guidance for selection organic , environmental and economical edible vegetable seedlings substrate prescription and a theoretical basis on resource uti l ization .

Material and methods

Maize seedlings /capsicum seedlings/Brassica pekinensis

Methods : hydroponic culture /pot incubation test/ foliage spraying

Microelements

mg/L

H3BO3 2.86

CuSO4·5H2O 1.81

ZnSO 4·7H2O 0.22

MnCl2·4H2O 0.08

H2MoO4·4H2O 0.09

Macroelements

g/L

Ca(NO3)2·4H2O 1.18

KNO3 0.51

MgSO4·7H2O 0.49

KH2PO4 0.14

Fe EDTA 0.005

HoaglandArnon

Nutrient solution formula

Extraction solution

Vermicompost : disti l led water=1:1(V:V)

Stir heavily per 8hours (4times in total)

Centrifugal to separate

Store in a 4 refrigerator℃

Nutrient solution

Extraction

Treatment Ⅰ

Treatment Ⅳ

Treatment Ⅲ

Treatment Ⅱ

Chlorophyll content

Nutrient (N) Nutrient3: Extraction1 Nutrient1: Etraction1 Extraction(E)

Fresh Root-Shoot Ratio

E E1: N1 E1: N3 N

Dry Root-shoot Ratio

E E1: N1 E1: N3 N

Length(cm)

ProjArea(cm2)

SurfArea(cm2)

AvgDiam(mm)

E 563.21 19.90 62.50 0.35

E1:N1 556.80 21.54 67.66 0.39

E1:N3 635.10 24.46 76.86 0.38

N 582.67 20.00 62.85 0.36

Root analysis system Type: WinRHTZ 2005a

LenPerVol(cm/m3)

RootVolume(cm3)

Tips Forks Crossings

E 563.210.56

665.67

1512.00

295.33

E1:N1556.80

0.65704.0

01695.0

0327.33

E1:N3 635.100.75

928.00

2121.67

408.67

N582.67

0.54715.3

31424.0

0285.00

Root Length Parameter

Root Surface Area Parameter

Planned work

Capsicum seedlings sampling and cultivating

Set up more than 7 treatments in propor tion of N,N8:E1,N4:E1,N1:E1,N1:E4,N1:E8 and E, with 3 replications.

Foliage sprayingDetect the elements of extracted

solutionMicromorphological analysis

Thin section investigation Ultrathin section Master Ultramicrotomy and be able

to use UltramicrotomePreparation of thin section Separation of microorganism and

analysis of microbial activityFinally determine causes for

vermicompost’s promotive ef fect on root

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