ESTIMATION OF CROP PRODUCTIVITY AND SOIL ORGANIC CARBON STOCK DYNAMICS IN ORGANICALLY GROWN RICE-RICE SEQUENCE
KrishiKosh
View Archive InfoField | Value | |
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
|
|