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Yield maximization in aerobic rice through integrated package of agrotechniques

KrishiKosh

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Title Yield maximization in aerobic rice through integrated package of agrotechniques
 
Creator C. M, Sunil
 
Contributor B. C, Shankaralingappa
 
Subject rice, farmyard manure, yields, nutrient management, weeds, biofertilizers, developmental stages, grain, packaging, nutrients
 
Description Field and pot experiments were conducted at University of Agricultural Sciences,
G.K.V.K., Bengaluru during kharif, 2011 and 2012 to study the effect of integrated
package of agrotechniques on growth, yield and quality of aerobic rice. There were 10
treatments replicated thrice in R.C.B.D. and C.R.D. Treatments receiving integrated weed
management practices (IWMP-Pre-emergence application of pyrazosulfuron ethyl at 25 g
a.i. ha-1 + One hand weeding at 20 days after sowing (DAS) + First intercultivation at 25
DAS and subsequent intercultivations at 15 days interval upto panicle initiation) recorded
significantly lower weed population (21.7 to 31.5 m-2) and weed dry weight (5.3 to 8.9 g
m-2) as compared to pre-emergence application of pyrazosulfuron ethyl alone (61.0 to
66.3 m-2 and 24.8 to 28.4 g m-2, respectively) which experienced severe weed
competition resulting in complete death of all rice plants. Application of RDF
(100:50:50:20 kg NPK & ZnSO4 ha-1) + FYM at 10 t ha-1 + FeSO4 at 12.5 kg ha-1 +
Biofertilizers (Soil application of Azospirillum and PSB-Bacillus megaterium at 4 kg
each ha-1) + IWMP recorded significantly higher grain yield (3880 kg ha-1) as compared
to RDF + FYM + IWMP (3053 kg ha-1). Higher grain yield was mainly attributed to
higher leaf area index, total dry matter, root length, root volume, root dry weight,
productive tillers, 1000 seed weight and filled grains per panicle. Significantly higher
uptake of nutrients by aerobic rice (76.7:14.9:102.4:0.48:3.75 kg N, P, K, Zn and Fe ha-1)
was also recorded with the same treatment. The quality parameters viz., protein, amylose,
zinc and iron content were significantly higher with RDF + FYM + FeSO4 +
Biofertilizers + IWMP (10.4%, 17.8%, 26.6 and 13.8 mg kg-1 grain, respectively) as
compared to those with RDF + FYM + IWMP (9.4%, 16.2%, 25.6 and 12.9 mg kg-1
grain, respectively). Higher net returns (Rs.51278 ha-1) and B:C ratio (3.30) were also
realized with the same treatment.
 
Date 2016-05-20T14:07:17Z
2016-05-20T14:07:17Z
2013-08-28
 
Type Thesis
 
Identifier Th-10617
http://krishikosh.egranth.ac.in/handle/1/66174
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru