Pengaruh Pengolahan Tanah dan Pemupukan Nitrogen terhadap Padi Gogo (Oryza sativa L.) Pada Bekas Lahan Alang-alang

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PEHGARUW PENGQLAHAN TANAM DAN PEMUQUKAN NITROGEN

YERNADAP QADI GOGO

(

Oryza

sativa

L.

)

PADA BEKAS LAHAM ALANG

-

ALANG

Oleh

AGUS PURWANTO

A 20.0111

J U R U S A N B U D I D A Y A P E R T A N I A N , F A K U L T A S P E R T A N I A N

I N S T I T U T P E R T A N I A N B O O O R

(3)

AGWS PURWANTO. P e n g a r u h p e n g o l a h a n t a n a h d a n p e m u p u k a n

n i -

t r o g e n t e r h a d a p p a d i g o g o ( O r v z a s a t i v z

L )

p a d a b e k a s l a h a n

a l a n g - a l a n g ( D i b a w a h b i m b i n g a n B.H. TAMPUF3OLON d a n SOEKIS-

M A N TJITROSEMITD).

T u j u a n p e r c o b a a n i n i a d a l a h r n e m p e l a j a r i p e n g a r u h .

m e t o -

d e t a n p a o l a h t a n a h d a n p e m u p u k a n n i t r o g e n t e r h a d a p p e r t m -

b u h a n d a n h a s i l p r o d u k s i p a d i ( O r y z a s a t i v a

L )

d e n g a n t e k -

n i k b u l i d a y a g o g o p a d a b e k a s p a d a n g s l a n g - a l a n g y a n g d i k e n -

d a l i k a n d e n g a n h e r b i s i d a g l y p h o s a t e , d a l a p o n , a t a u i m a z a p y r .

P e r c o b a a n d i l a k s a n a k a n d i r u m a h : , k a c a B i o t s o p Ta j u r ,

B o g o r , r r ; u l a i b u l a n November 1 9 8 6 h i n g g a b u l a n Mei 1 9 8 7 .

P e r c o b a a n d i s u s u n s e c a r a f a k t o r i a l d e n g a n r a n c a n g a n

a c a k l e n g k a p d e n g a n 2 f a k t o r clan 5 u l a n g a n . F a k t o r p e r t a m a

a d a l a h c a r a p e n g o l a h a n t a n a h y a n g t e r d i r i d a r i 5 t a r a f p e r -

l a k u a n y a i t u : P1 ( t a n p a o l a h t a n a h +. g l y p h o s a t e ) , P 2 ( t a n -

p a o l a h ~ t a n a h

+

d a l a p o n ) , P3 ( t a n p a o l a h t a n a h

+

i m a z a p y r ) ,

P 4 ( ~ e m b o n g k a r a n r h i z o m e ) , d a n P 5 ( p a m b a b a d a n ) . F a k t o r k e -

d u a a d a l a h p e m u p u k a n n i t r o g e n y a n g t e r d i r i d a i i 4 t a r a f p e f -

l a k u a n y a i t u : N1 ( 0 k g

ha),

M2 ( 6 0 k g

ha),

N 3 ( 6 0

+

6 0

k g

h ha),

d a n N q ( 9 0 +. 90 kg

ha).

H a s i l n y a m e n u n j u k k a n bahwa m e t o d e t a n p a o l a h t a n a h d e -

n g a n m e n g g u n a k a n h e r b i s i d a g l y p h o s a t e ( 2 k g b.a./ha) l e b i h

b a i k d i b a n d i n g k a n , d e n g a n p e r l s k u z n h e r b i s i d a d a l a p o n (2.0

+

1 0 . k ~ b . a . / h a ) d a n i m a z a p y r ( 1 , 5 k g b . a . / h a ) maupun p e n g o u -

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Pemupukan n i t r o g e n b e r p e n g a r u h s a n g a t n y a t a pada t i n g -

g i tanaman pada s a a t panen, j u m l a h a n i k a n pada s a a t panen,

j u m l a h a n a k a n p r o d u k t i f , p a n j a n g m a l a i , j u m l a h gabah p e r

m a l a i , dan p r o d u k s i g a b a h k e r i n g o i l i n g p e r p o t . B e r p e n g a -

r u h n y a t a pada b o b o t 1 0 0 0 b u t i r g a b a h i s i d a n t i d a k b e r p e -

n g a r u h ny.ata p a d a p e r s e n t a s e g a b a h hampa.

Pemupukan n i k r o ~ e n dengan, d o s i s 0 kQ/ha s a m p a i 1 8 0

kg/ha m e m b e r i k a n r e s p o n l i n i e r pada semua p a r a m e t e r y a n g

d i a m a t i .

I n t e r a k s i a n t a r a metode p e n g o l a h a n t a n a h d a n pemupu-

k a n b e r p e n g a r u h s a n g a t n y a t a p a d 2 j u m l a h a n a k a n pada s a a t

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PENGARU,H PENGDLAHAN TANAH DAN PEMUPUKAN lriITROGEN

TERM,ADAP P A D 1 GOGD

( ~ r y z a

s a t i v a L.)

PADA BEKAS LAHAN ALANG-ALANG

o l e h .

AGUiS PURWANTO A 2 0 0 1 1 1

L a p o r a n K a r y a I l r n i a h S e b a g a i S a l a h S a t u S y a r a t U n t u k

M e m p e r o l e h G e l a r S a r j a n a P e r t a n i a n ,

p a da

F a k u l t a s P e r t a n i a n , I n s t i t u t P e r t a n i a n B o g o r

JURUSAN BUD1 OAYA PERTANIAN, FAKULTAS PERTANIAN

I N S T I T U T PERTANIAN BDGDR

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INSTITUT PERTANIAN B O G O R

FAKULTAS PERTANIA N , JURUSAN B U D 1 D A Y A PERTANIAN

Kami m e n y a t a k a n bahwa l a p o r a n K a r y a I l m i a h y a n g d i s u s u n

o l e h

Nama r n a h a s i s w a : AGUS PURWANTO

Nomor pOk0k : A 2 0 0 1 1 1

J u d u l : PEN'GARUH: PENUOLAHRN TANAH. D A N PEN.UPUKAN

N,ITRDGEN TERHADAP PAD1 G D G O ( D r y z a s a t i v a Ld

PAOA BEKAS LAHA.N ALAMG-ALANG

d i t e r i m a s e b a g a i p e r s y a r a t a n - u n t u k m e m p e r o l e h g e l a r . S a r j a n a

P e r t a n i a n p a d a F a k u l t a s P e r t a n i a n , I n s t i t u t P e r t a n i a n B o g o r .

\

4PIULd

)

( S o e k i s m a n T j i t r o s e m i t o , MSc.)

D o s e n P e m b i m b i n g

I

D o s e n Pernbirnbing I1

( I r . S u o e n o S u d i a t s o , MS)

K e t u a J u r u s a n . P a n i t i a K a r y a I l r n i a h

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