Paper Information

Title: 

THE EFFECT OF AZOLLA HERBICIDES ON YIELD AND YIELD COMPONENT OF RICE

Type: PAPER
Author(s): ASHRAFI SEYYED YASER,ALIZADEH HASSAN,YAGHOUBI BIJAN,ABTALI YAHYA,BEHESHTIAN MESGARAN MOHSEN
 
 
 
Name of Seminar: IRANIAN WEED SCIENCE CONGRESS
Type of Seminar:  CONGRESS
Sponsor:  ANKOMANE OLOME ALAFHAYE HARZE IRAN
Date:  2010Volume 3
 
 
Abstract: 

TO EVALUATED EFFECT AZOLLA AND ITS CHEMICAL CONTROL ON RICE YIELD WAS STUDIED AT JUYBAR RICE FIELDS, MAZANDARAN IN 2008 GROWING SEASON. TREATMENTS WERE ARRANGED IN A COMPLETE RANDOMIZED BLOCKS DESIGN WITH FOUR REPLICATIONS. HERBICIDES TREATMENTS INCLUDED CINSULFOURON (AT 150 AND 225 G/HA), BENSULFUROUN METHYL (AT 70 AND 105 G/HA), U-46 (AT 1 AND 3 L/HA), PRETILACLOR (AT 2 AND 3 L/HA), BENTAZON (AT 2.5 AND 3.75 L/HA) AND SUNRICE PLUS (3 AND 4.5 L/HA). NON-TREATED, AZOLLA INFESTED AND AZOLLA FREE PLOTS CONSTITUTED THE CHECK TREATMENTS. ALL HERBICIDES RESULTED IN INCREASED RICE YIELDS AS COMPARED WITH UNTREATED, AZOLLA INFESTED CONTROL EXCEPT U-46 AT 1 L/HA WHICH HAD THE LOWEST GRAIN YIELD (3542 KG/HA). BENSULFORUN AT 70 G/HA PRODUCED THE HIGHEST YIELD (4473 KG/HA) AND DID NOT VARY FORM THE AZOLLA-FREE RICE. THE GREATEST NUMBER OF FERTILE TILLERS WERE OBTAINED FROM BENSULFORUN METHYL, CINSULFORUN AND BENTAZON AT THEIR BOTH APPLICATION RATES AND SUNRICE PLUS AT 4.5 L/HA BUT U-46 RESULTED IN LEAST FERTILE TILLERS WHEN APPLIED AT 1 L/HA. PLANT HEIGHT WAS ALSO AFFECTED BY HERBICIDES WHERE THE MAXIMUM AND MINIMUM HEIGHTS WERE OBSERVED WITH CINOSULFORUN AT 150 G/HA AND U- 46 AT 1 L/HA, RESPECTIVELY. ALL HERBICIDES HAD THE SAME PANICLE LENGTH AS WITH AZOLLA-FREE CONTROL EXCEPT PRETILACLOR AT 2 L/HA AND BENTAZON AT 2.5 L/HA WITH SIGNIFICANTLY SHORTER PANICLES. THOUSAND SEED WEIGHT DID NOT DIFFER AMONG TREATMENTS.

 
Keyword(s): AZOLLA, PADDY FIELD, HERBICIDE, FOLIAR APPLICATION, RICE YIELD
 
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