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STUDIES ON NITROGEN LOSSES, METHANE EMISSION AND PRODUCTIVITY OF RICE UNDER CROP ESTABLISHMENT TECHNIQUES

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Title STUDIES ON NITROGEN LOSSES, METHANE EMISSION AND PRODUCTIVITY OF RICE UNDER CROP ESTABLISHMENT TECHNIQUES
 
Creator JAYADEVA, H M H.M.
 
Contributor PRABHAKARA SETTY, T K
 
Subject null
 
Description Field experiments were conducted on the red clay loam soil of Agricultural Research
Station, Kathalagere during 2005 and 2006 to study the nitrogen losses, methane emission
and productivity of rice under crop establishment techniques. The investigation involved
tliree sets of experiments. The first set comprised of three establislmient tecliniques
(Transplanting, SRI and Aerobic) and four sources of nitrogen [Urea, Ammonium sulphate,
complex fertilizer (17:17:17) and large sized urea granules] in split plot design with tliree
replications. The second set comprised of tliree establislmient tecliniques and four sources of
nutrients {Rec. NPK, in-situ green manure (Sunnhemp) + Rec. NPK, Paddy straw manuring
+ Rec. NPK and FYM + Rec. NPK} in CRD (pot experiment) and split plot design (Field
experiment) with three replications. The third set comprised of three establishment
techniques and five management practices at maximum tillering stage (with hold moisture,
with hold nitrogen, with hold moisture and nitrogen, spray 2,4-D @ 0.5 kg a.i. ha" and
normal cultivation practices) in split plot design with three replications.
The combination of SRI establishment technique with large sized urea granules
recorded higher grain yield (10466, 10767 and 10617 kg ha" in kharif, summer and pooled
analysis, respectively), growth, yield attributes, nutrients uptake, energy output:input ratio
and B:C ratio (2.88, 3.09 and 2.98 in kharif, summer and pooled analysis, respectively) as
compared to other treatment combinations. The combination of Aerobic technique and large
sized urea granules recorded lower total volatilization loss (2.20, 2.95 and 2.58 kg ha"1) in
kharif, summer and pooled analysis, respectively.
The SRI establishment technique with FYM + Rec. NPK recorded higher grain yield
(59.50 g hill" and 10267 kg ha"1 in kharif and summer, respectively), growth and yield
parameters and nutrients uptake. The combination of SRI technique and in-situ green
manure (Sunnhemp + Rec. NPK) recorded higher B:C ratio of 3.01 during summer, 2006.
Transplanting with paddy straw manuring + Rec. NPK recorded higher total methane
emission (33.54 and 33.71 mg plant"1 day"1) in kharif and summer, respectively than other
combinations.
The SRI technique and with hold moisture and nitrogen at maximum tillering stage
recorded higher grain yield (10383, 10683 and 10533 kg ha"1 ), number of productive tillers
hill (24.80, 25.00 and 24.90), yield parameters, energy outputinput ratio (19 84 18 34 and
19.09) and B:C ratio (2.75, 2.94 and 2.85) in kharif summer and in pooled analysis
respectively compared to other combinations.
 
Date 2017-02-22T06:36:32Z
2017-02-22T06:36:32Z
2009-02
 
Type Thesis
 
Identifier TH-8913
http://krishikosh.egranth.ac.in/handle/1/5810002108
 
Language en
 
Format application/pdf
 
Publisher UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU