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Effect of seed rates, irrigation intervals and weed pressure on productivity of direct-seeded rice (Oryza sativa )*

Indian Agricultural Research Journals

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Title Effect of seed rates, irrigation intervals and weed pressure on productivity of direct-seeded rice (Oryza sativa )*
 
Creator MAHAJAN, G
SARDANA, V
BRAR, A S
GILL, M S
 
Subject Direct-seeded rice; Oryza sativa; Seed rates; Irrigation interval; Weed control
 
Description A field investigation conducted during rainy seasons 2000 and 2001 on sandy loam soils of Gurdaspur, Punjab showed that seed rate of 100 kg/ha caused significant reduction in dry matter of weeds and significantly increased. the grain yield over seed rate of 50 kg/ha in both years. Increasing irrigation interval from 2 to 3 days though increased the grain yield by 0.2 tonne/ha the effect was not significant. Integrated weed management comprising 2 hand-weedings in addition to application of 0.75 kg/ha pretilachlor caused significant reduction in dry matter ofweeds and significantly increased grain yield through marked improvement in yield attributes over that of chemical control of weeds alone in both the years. Interaction ofseed rates and methods ofweed control revealed that dry matter ofweeds in case ofintegrated weed control with 50 kg/ha seed rate was significantly lower than that ofchemical weed conq-ol with seed rate of 150 kg/ ha. Panicles/m2 and grains/panicle were significantly higher with 50 kg/ha seed rate in integrated compared to seed rate of 100 kglha in chemical weed control. Mean grain yield with seed rate of 100 kg/ha in integrated weed control (6.47 tonneslha) was significantly higher than with 150 kg/ha in chemical weed control (5.91 tonnes/ha). 
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2011-01-10
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/3361
 
Source The Indian Journal of Agricultural Sciences; Vol 76, No 12 (2006)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/3361/1385
 
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