Effect of fertility levels and herbicides on growth, yield and nutrient uptake of direct-seeded rice (Oryza sativa)
DOI:
https://doi.org/10.59797/ija.v49i1.5150Keywords:
Direct-seeded, Fertility levels, Herbicides, Nutrient uptake, RiceAbstract
A field experiment was conducted during the rainy seasons of 1999 and 2000, to find out the effect of fertility levels and herbicides on growth, yield and nutrient uptake of direct-seeded rice (Oryza sativa L.). The fertility level up to N4,P4,K,, + 25 kg ZnSO, + foliar spray of micronutrient mixture (thrice) proved the best, producing 6.34 qlha extra grain and Rs 6,9681ha extra net return over no fertility level. Hand-weeding (20 and 40 days after sow- ing) showed 72% weed-control efficiency with additional grain yield up to 9.91 qlha and net return up to Rs 5,0421ha over unweeded control. Pendimethalin 1.0 kglha or anilophos 0.40 kglha each with 2,4-D (Na-salt) 0.60 kglha showed 50 to 51% weed-control efficiency and proved the best substitute of hand-weeding (twice), the ex- tra net return being Rs 3,689 and Rs 3,074/ha, respectively, over unweeded control. The seed protein and nutri- .ent uptake were also increased significantly with increasing fertility levels and the herbicides over their respec- tive controls.References
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Rao, C.P. and Shukla, D.N. 1999. Yield and nutrient uptake of rice as influenced by sources and levels on phosphorus and zinc un- der transplanted conditions. Indian Journal of Agronomy 44(1) :94-98.
Choubey, N.K., Tripathi, R.S., Ghosh, B.C. and Kolhe, S.S. 1998. Influence of fertilizer and weed management practices on weed growth of direct-seeded upland rice. Oryza 35(2) : 154-158.
Dhiman, S.D., Nandal, D.P., Singh, Bikram and Hari On. 1998. Ef- ficiency of herbicides and their combinations on weed con- trol in scented dwarf rice. Indian Journal of Agronomy 43(2) : 295-297.
Khanda, C.M., and Dixit, L. 1996. Effect of zinc and nitrogen fertili- zation on yield and nutrient uptake of summer rice. Indian Journal of Agronomy 41(3) : 368-372.,
Patel, S.R., Thakur, D.S. and Lal, N. 1998. Integrated weed manage- ment in direct-seeded rice. Environment and Ecology 16(4) :852-854.
Rao, C.P. and Shukla, D.N. 1999. Yield and nutrient uptake of rice as influenced by sources and levels on phosphorus and zinc un- der transplanted conditions. Indian Journal of Agronomy 44(1) :94-98.
