Calibration Studies of Drum Seeder Slot Response to different High Yielding Paddy varieties in Tamil Nadu

Author: I. Chinnamani, R. Durai Singh, V. K. Paulpandi, R. Geetha, E. Murugan and S. Selvam

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Abstract

A calibration study and field experiment were carried out at Agricultural College and Research Institute, Madurai to evaluate the suitability of modified drum seeder slots with high yielding varieties during Kharif 2021. Uneven seed drop and seed scattering is more in normally used drum seeder. In this context experiment was taken out to reduce the seed scattering, seed rate and seed drop per hill. Experiment design adopted was split plot. Main plot consists of Varieties like ADT 45 (Medium slender), MDU 6 (Long slender) and ASD 16 (Short bold) and medium duration variety VGD 1 (Short Slender). Drum seeder slots viz. round slot, oval slot, round slot with guiding pipe, oval slot with guiding pipe and self metering slot were taken in sub plots. Calibration study was carried out using paddy drum seeder to evaluate seed flow rate, total seed dispersion, seed dispersion rate and seed rate. Results revealed that oval slot with guiding pipe registered less seed flow rate (4.5 g), total seed dispersion (88.5 g), seed dispersion rate (5.62 seeds m-1) and seed rate (9.25 kg ha-1) compared to other slot modifications. Among the varieties tested, VGD 1 registered less seed flow rate (), total seed dispersion (297.6 g), and seed rate (31.01 kg ha-1) due to the nature of grain shape. While seed dispersion rate was less with ASD 16 (11.07 seeds m-1). Plant population m-2 was minimum with oval slot with guiding pipe (49.3 plants m-2) and ASD 16 (55.04 plants m-2). Response of ASD 16 and MDU 6 was on par when used with oval slot fitted with guiding pipe.

Keywords

Direct sowing, Slot modification, Drum seeder, Calibration

Conclusion

Comparing the different slot modification in drum seeder using varying seed shapes the minimum flow rate, seed dispersion was noted with Oval slot fitted with guiding pipe used with different seed shapes of rice varieties used in the experiment. The maximum flow rate and seed dispersion were observed in round slot with VGD 1, ADT 45, MDU 6 and ASD 16 compared to other slot modification in drum seeder. Oval slot with guiding pipe recorded minimum flow rate and seed dispersion. There is significant influence among the varieties due to varying seed size of each variety. MDU 6 and ASD 16 recorded minimum flow rate, seed dispersion, seed rate and plant population and was presented in (Table 3). Similar findings given by Kumar et al. (2017).

References

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How to cite this article

I. Chinnamani, R. Durai Singh, V. K. Paulpandi, R. Geetha, E. Murugan and S. Selvam (2022). Calibration Studies of Drum Seeder Slot Response to different High Yielding Paddy varieties in Tamil Nadu. Biological Forum – An International Journal, 14(4): 752-756.