Agricultural Science Digest

  • Chief EditorArvind kumar

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Agricultural Science Digest, volume 42 issue 5 (october 2022) : 568-573

Nutrient Availability and Nutrient Uptake by Crop and Weed as Influenced by Stale Seedbed, Mulching and Mechanical Weeding in Okra

Seethal Rose Chacko, Sheeja K. Raj, P. Shalini Pillai, D. Jacob, P.R. Geetha Lakshmi, N.V. Radhakrishnan, R.K. Krishnasree
1Department of Agronomy, College of Agriculture, Kerala Agricultural University, Vellayani-695 522, Kerala, India.
Cite article:- Chacko Rose Seethal, Raj K. Sheeja, Pillai Shalini P., Jacob D., Lakshmi Geetha P.R., Radhakrishnan N.V., Krishnasree R.K. (2022). Nutrient Availability and Nutrient Uptake by Crop and Weed as Influenced by Stale Seedbed, Mulching and Mechanical Weeding in Okra. Agricultural Science Digest. 42(5): 568-573. doi: 10.18805/ag.D-5529.
Background: Weeds are the major biological constraint in okra due to its slow initial growth and wider row spacing. Due to severe crop weed competition, weeds removed considerable amount of nutrients from the soil. Competition exists between the crop and weed for nutrients results in nutrient deficiencies in crop. Hence the present experiment is formulated to assess the effect of stale seedbed, mulching and mechanical weeding on nutrient availability, nutrient uptake by crop and weed in okra.
Methods: Experiment was conducted at Coconut Research Station, Balaramapuram, Thiruvananthapuram, Kerala during Rabi 2020-21. Design adopted for the study was RBD with two factors. The first factor was seedbed preparation (S) and the second factor was weed management (W). Stale seedbed (S1) and normal seedbed (S2) were the two different seedbed preparation methods and dried banana leaf mulch @10 t ha-1 alone (W1), dried banana leaf mulch @10 t ha-1 fb wheel hoe weeding at 30 and 45 DAS (W2), dried banana leaf mulch @10 t ha-1 fb hand weeding at 30 and 45 DAS (W3), wheel hoe weeding at 15, 30 and 45 DAS (W4), hand weeding at 15, 30 and 45 DAS (W5) and weedy check (W6) were the six different weed management options tried. Soil samples were collected after the harvest of the crop to determine the nutrient availability. Weed samples at 30 and 60 DAS and plant samples at harvest were analyzed to determine the NPK content and respective uptake of nutrients were calculated by multiplying the nutrient content with DMP.
Result: Stale seedbed significantly enhanced the dry matter production and nutrient uptake by okra at harvest and lowered the nutrient removal by weeds at 30 and 60 DAS. Compared to non-stale, stale seedbed recorded significantly higher fruit yield. Among the weed management, wheel hoe weeding at 15, 30 and 45 DAS, recorded the lowest total weed dry weight at 30 and 60 DAS and resulted in the highest NPK uptake by crop and fruit yield. Uncontrolled weed growth resulted in a loss of 81.33, 18.16 and 50.84 kg N:P:K ha-1 at 30 DAS and 102.09, 57.90 and 55.31 kg N:P:K ha-1 at 60 DAS, respectively. Nutrient removal by weeds was the lowest in wheel hoe weeding at 15, 30 and 45 DAS and the highest in weedy check. It could be concluded that, wheel hoe weeding at 15, 30 and 45 DAS was the best option for the management of weeds, higher nutrient availability and uptake and yield in okra.

  1. Akbar, N., Ehsanullah, K., Jabran and Ali, M.A. (2011). Weed management improves yield and quality of direct seeded rice. Australian Journal of Crop Science. 5(6): 688-694.

  2. Gaurav, S.K., Verma, R.S., Meena, A.C., Maurya and Kumar, S. (2018). Nutrients uptake and available nutrients status in soil as influenced by sowing methods and herbicides in kharif maize (Zea mays L.). International Journal Agricultural Environment Biotechnology. 11(1): 17-24.

  3. Kujur, A., Bhadauria, N. and Rajput, R.L. (2015). Effect of weed management practices on seed yield and nutrient (NPK) uptake in cowpea. Legume Research. 38(4): 555-557.

  4. Kumar, D., Angiras, N.N., Singh, Y. and Rana, S.S. (2005). Influence of integrated weed management practices on weed competition for nutrients in wheat. Indian Journal of Agricultural Research. 39(2): 110-115.

  5. Kumar, G.K., Kiran, B.R. and Krishna, M. (2019). Performance and evaluation of power weeder, wheel hoe, star weeder under dryland conditions. International Journal Current Microbiology Applied Sciences. 7(12): 1669-1675.

  6. Mahadevaiah, K. and Karunasagar, G. (2014). Effect of integrated weed management practices on yield, nutrient uptake and economics of baby corn. Agricultural Science Digest. 34(4): 303-306.

  7. Mynavathi, V.S., Prabhakaran, N.K. and Chinnusamy, C. (2008). Evaluation of mechanical weeders in irrigated maize. Indian Journal of Weed Science. 40(3 and 4): 210-213.

  8. Parameswari, Y.S. and Srinivas, A. (2014). Influence of weed management practices on nutrient uptake and productivity of rice under different methods of crop establishment. Journal of Rice Research. 7: 1-2.

  9. Ranjit, J.D. (2007). Paper presented to training on weed management in rice. April 25-27, NARC, Khumaltar.

  10. Sannagoudar, M.S., Murthy, K.K., Ghosh, A., Singh, A.K., Gupta, G., Halli, H.M. and Kumar, R.V. (2021b). Comparative efficacy of leguminous intercrops and weed management practices on nutrient uptake, productivity and profitability of maize based intercropping system. Legume Research- An International Journal. 1. p.6. DOI:10.18805/LR-4743.

  11. Sannagoudar, M.S., Murthy, K.K., Nagaraju, Rajanna, G.A., Ghosh, A., Singh, A.K., Gupta, G. and Kumar, R. (2021a). Influence of weed management practices in maize (Zea mays) based intercropping system. The Indian Journal of Agricultural Sciences. 91(7): 1067-1071.

  12. Satyareddi, S.A., Devasenapathy, P., Chinnuswamy, C., Kaleeswari, R.K. and Mynavathi, V. (2015). Influence of non chemical weed management practices on nutrient uptake in sunflower and weeds. Trends in Biosciences. 8(13): 3503- 3507.

  13. Sharma, S.N. and Singh, R.S. (2011). Seed rate and weed management on yield and nutrient uptake of wheat (Triticum aestivum). Indian Journal of Agricultural Sciences. 81(12): 1174-1179. 

  14. Sinchana, J.K. (2020). Integrated weed management in bush type vegetable cowpea [Vigna unguiculata subsp. unguiculata (L.) Verdcourt]. M.Sc. (Ag). thesis, Kerala Agricultural University, Thrissur. 226p.

  15. Tehria, S.K., Rana, S.S. and Kumar, S. (2015). Nutrient uptake by weeds in pea as influenced by phosphorus and weed management. Indian Journal of Weed Sciences. 47(2): 144-149.

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