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ESTIMATION OF CROP PRODUCTIVITY AND SOIL ORGANIC CARBON STOCK DYNAMICS IN ORGANICALLY GROWN RICE-RICE SEQUENCE

KrishiKosh

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Title ESTIMATION OF CROP PRODUCTIVITY AND SOIL ORGANIC CARBON STOCK DYNAMICS IN ORGANICALLY GROWN RICE-RICE SEQUENCE
 
Creator Pradhan, Saswat
 
Contributor Bastia, Dillip Kumar
 
Subject ESTIMATION OF CROP PRODUCTIVITY AND SOIL ORGANIC, CARBON STOCK DYNAMICS, ORGANICALLY GROWN, RICE-RICE SEQUENCE
 
Description The field experiment was conducted on “Estimation of crop productivity and soil
organic carbon stock dynamics in organically grown rice-rice sequence” during 2013-
2014 in Organic Block of Central Research Station, Orissa University of Agriculture and
Technology, Bhubaneswar. The experiment was laid out in a randomized block design
with seven treatments viz., Dhanicha @ 25 kg seed/ha (T1), Dhanicha + FYM @ 5t/ha
(basal) (T2), Dhanicha + vermicompost 2t/ha (basal) (T3) , T1 + vermicompost 2t/ha
(split) (T4), T1 + FYM+ vermicompost (split) (T5), T1 + FYM+ vermicompost (basal)
(T6), T1 + FYM + Panchagavya (T7) in kharif season, and in summer season, all the
corresponding treatments were the same except Dhanicha. The soil of the experimental
site was sandy loam with pH 6.35, BD 1.58 t m-3, PD 2.65 t m-3, high in organic carbon
(9.4 g kg-1) and medium in available N-P2O5-K2O (376.0, 34.39 and 221.27 kg ha-1,
respectively). Rice variety “Lalat” was grown as the test crop. Pot manure was used
intermittently as a prophylactic measure against disease and insect pest infestation.
Organic nutrient management expressed significant effect on all growth
parameters of rice. Number of tiller per hill at 45 DAT were maximum (30.67 and
30.59 in kharif and summer seasons, respectively) for treatment receiving Dhanicha
+ FYM + vermicompost (split) in kharif and corresponding treatment receiving FYM
+ vermicompost (split) in summer (T5) which was at par with those of T3, T4 and T6 in
both the seasons. Number of effective tillers per hill also observed similar trend. At 75
DAT, the root volume per hill was found to be maximum in T5 i.e. 86.78 and
86.02 cc, respectively which were at par with those of treatments T6 and T7 in both the
seasons. Dry matter production per hill at maturity was significantly more for T5
(75.99 and 75.80 g hill-1 in respective seasons). Yield attributes and yield were also
significantly affected by organic nutrient management and biodynamic formulations.
Number of panicle m-2 was significantly maximum for T5 (388.27 and 382.93 in
kharif and summer seasons, respectively) at harvest. However, these were at par with
those of T4, T6 and T7 in both the seasons. As regards to spikelet per panicle, T5
registered the maximum (154.67 and 150.67 in kharif and summer seasons,
respectively) which were at par with those of treatments T4, T6 and T7 in kharif and T6
and T7 in summer season respectively. Number of filled grains per panicle also
observed similar trend. Test weight was not affected much by organic nutrient
management treatments. Grain yield and straw yield were significantly higher for T5
(5.05 and 5.64; 4.93 and 5.55 t ha-1 in kharif and summer seasons, respectively)
which was at par with those of T4, T6 and T7 in both the seasons for grain yield and T4,
T6 and T7 in kharif and T6, T7 in summer for straw yield. On the other hand, the
minimum values were observed for T1 for all the aforementioned parameters. Nutrient
(N-P-K) content was estimated to be the maximum in T1 whereas nutrient uptake was
found higher in T5 (52.47 and 17.39; 12.01 and 4.47; 9.78 and 88.45 in kharif; 50.76
and 16.14; 11.36 and 3.91; 8.24 and 79.70 kg ha-1in summer season, respectively).
Soil organic carbon stock was found maximum in treatment T5 (46.29 t ha-1), which was
at par with those of T4, T6 and T7. Highest rate of sequestration was resulted in T5
(4.00 t ha-1 year-1), which was at par with T3 and T4. Both these parameters were
found minimum in T1. SYI of rice-rice sequence in kharif and summer season were
registered to be the highest in T5 (0.78 and 0.77) in kharif and summer seasons,
respectively. Gross return, net return and return per rupee invested were affected by
organic nutrient management. Net return was the highest for T5 (` 27,679 and ` 25,802
ha-1 in kharif and summer seasons, respectively) with return per rupee invest of`` 1.85
and ` 1.78 as compared to T1 which accounted for lowest net return (` 15,788 and
` 14,094 ha-1) with return per rupee invest of ` 1.55 and ` 1.48, in kharif and summer
seasons, respectively. Keeping the grain yield, net monetary return and soil organic
carbon status in view, organic nutrient management option like Dhanicha + FYM +
vermicompost (split) in kharif and FYM + vermicompost (split) in summer can be
advocated in organically grown rice-rice sequence.
 
Date 2016-12-21T15:36:44Z
2016-12-21T15:36:44Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/91924
 
Language en
 
Relation Th;4265
 
Format application/pdf