STUDIES ON NITROGEN LOSSES, METHANE EMISSION AND PRODUCTIVITY OF RICE UNDER CROP ESTABLISHMENT TECHNIQUES
KrishiKosh
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Title |
STUDIES ON NITROGEN LOSSES, METHANE EMISSION AND PRODUCTIVITY OF RICE UNDER CROP ESTABLISHMENT TECHNIQUES
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Creator |
JAYADEVA, H M H.M.
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Contributor |
PRABHAKARA SETTY, T K
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Subject |
null
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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. |
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Date |
2017-02-22T06:36:32Z
2017-02-22T06:36:32Z 2009-02 |
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Type |
Thesis
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Identifier |
TH-8913
http://krishikosh.egranth.ac.in/handle/1/5810002108 |
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Language |
en
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Format |
application/pdf
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Publisher |
UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
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