BIOSULFO FERTILIZER DEVELOPMENT FOR HORTICULTURE CROPS II, THE EFFECT OF PHOSPHATE ROCK CONTENT AND INOCULUM RATIO OF BIOSULFO ON P AND S UPTAKE AND YIELD OF RED ONION IN ACID AND ALKALINE SOILS

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BIOSULFO

FERTILIZER DEVELOPI{ENT

FOR HORTICULTURE CROPS II, THE

EFFECTOF PHOSPHATE

ROCKCONTENTAND

INOCULUIVl

RAT]O OF

BIOSULFO

ON P

AI]D

S

UPTAKEAND YIELD

OF RED ONJON IN ACID AND

ALKAL]NE

SOILS

ra.!rly orAsi:u

rure

unveEly

ot seb? as M3rcr surakana

J

k

suram 36A

Keilnoai

Surrkada s7126Ceilra J3va ndonesa

rAqrcuture univeEry or cadjah Mada yosyskana

I

6i5ee4 E.mai

adad

uns@vahoocom

1s99:

&yanr

20031 or

irns

(satih cr

a1

rgas

ar

al,

2000i Fenice er a/

2000i Reddy er a/ _,2002 saslro,20r]6). Mcrcbes dssove rhe PRP by rheir acids prcduced borh

o4af c lsleYenson

Fenc. erar,2000rGadaq and sa, 2002i sasro, 2006)

s

re

as

noqanc acds

(c.rre

1999).

allemalvewayloicrcasetlioavailabillyolFftom

phcsphde

(sspl.r

rpd

super phosphare

lrspl

(cren,{

HammoM

2003) Padjany acdualed

€n

aEo be

doie

wrh

sultur c acid produced by sultur

uld

z ns mi6obes.

F3rmeE I AL

shra

have tDnq besn used E osurer

3id

3u[ur

i

!r&r

avaiabre F (risdae er a/,

lssol

rhe

research or

supry$

(2006t

shlrcd

rhe addirion

ol

surtuc

rrre run _susor

n.,4'r

i

p

ko6ka,2

iqu d medium

rhh

opeis

!p

oppcdunres

ror

Fln'

se

o'

dsso

liion

o,

phosptrale

,lre.

and sunu

oxd4r

funsus P. na&ioyoturs lnd v dua y have been known ro dhsorv€ r,\e PR P,

r

,&er

and surturoxd zer

fuisrs

P

,a,gbye,s,s capabre of d

ssvins

PR.p

m.k{ufu

_IFRS)conleil and

bosu fo on P and S uplake and €d onon yre d on

acid

(ariso)

and akarne

(vei$r)

eis

rwo faclds

daualed

*re

PRS mnrenr

(0%

60% 30%) and inocurum or

/.n€e,

Pnarqirve,s,s Er o

of bGurro (0:0, 1 1 and

3r)

As mu.h of 12 ks of

ei

(o 2 mm) mred rhoroushrywrrr biosurfn, basc

Ied]l4andmanurepuljnlopolylaolhcnmle,iiq

on

oi

was p

a

dl

lo

dch

pol)6aq

aid ru

bated n

0ie

gEn

holse. Trre elperlnrenb

a:nqed

,i

onpleley

hndomzed

EpiErions

Varabes obseoed incuddr P

aid

S

uprake, and onion

yed

ar 5"/o levelor s _sn

lcail

ldMd

wlh DrlrRT

ra

y

ssnir€d

niuenG

on

a.d

Amso

Hiqhesl P an{j s uplakc and onron

] ] aid Pe l]t f.r Verl soL resDellYe,

Effob

lo

ncrea* rhe

soubiitorp

rDsp,rrc

(P)

fton

phosphate rock (PRl has been done br

dpolig

ths

1016