Evaluation of Herbicides Efficacy to Control the Complex Weed Flora of Dry Direct Seeded Rice (Oryza sativa L.)

Sinniah, U. R., Wahyuni, S., Syahputra, B. S. A. and Gantait, S. 2012. A potential retardant for lodging resistance in direct seeded rice ( Oryza sativa L.). Can. J. Plant Sci. 92: 13–18. Yield losses in rice are heavy, particularly when lodging occurs after heading. A major contributing factor towards lodging is the tall phenotypic characteristic of the plant. In rice, application of growth retardant can reduce plant height by means of internode retardation. In this study, paclobutrazol at 50, 100 and 200 ppm was applied as a foliar application at panicle initiation on MR 219 and MR 84 cultivars and its effects on growth, lodging resistance and yield were studied. Foliar-applied growth retardant inhibited plant growth and retarded internode and culm length but increased culm diameter. All treated plants had higher bending resistance compared with the control. A significant positive correlation was observed between increased culm diameter and stem bending resistance (r=0.885). Histological studies showed greater compaction of parenchyma cells with thickening of parenchyma cell walls. Treatments with either 50 or 100 ppm paclobutrazol gave significant retardation of internodes and gave higher stem bending resistance with significant increase in yield.

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Productivity and economics of direct seeded rice (Oryza sativa L.) as affected by moisture regimes and seed priming under sandy loam and silty clay loam soils

Research on Crops ◽

10.5958/2348-7542.2017.00001.8 ◽

2017 ◽

Vol 18 (1) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Vimal Raj Yadav ◽

Subhash Chandra ◽

Gurvinder Singh ◽

Samar Pal Singh

Keyword(s):

Oryza Sativa ◽

Sandy Loam ◽

Oryza Sativa L ◽

Seed Priming ◽

Silty Clay ◽

Clay Loam ◽

Silty Clay Loam ◽

Moisture Regimes ◽

Direct Seeded

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Influence of plant densities on growth and yield of direct seeded rice (Oryza sativa L.)

Agricultural Research Journal ◽

10.5958/2395-146x.2016.00119.8 ◽

2016 ◽

Vol 53 (4) ◽

pp. 594

Author(s):

Simerjeet Kaur ◽

Surjit Singh

Keyword(s):

Oryza Sativa ◽

Oryza Sativa L ◽

Growth And Yield ◽

Plant Densities ◽

Direct Seeded

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Assessing the Economic and Energy Use Efficiencies of Direct Seeded and Transplanted Rice (Oryza sativa L.) in Lamjung, Nepal

International Journal of Applied Sciences and Biotechnology ◽

10.3126/ijasbt.v4i2.14854 ◽

2016 ◽

Vol 4 (2) ◽

pp. 172-177

Author(s):

K. Thapa ◽

A. Shrestha ◽

M. P. Neupane ◽

L. P. Amgain

Keyword(s):

Oryza Sativa ◽

Energy Use ◽

Oryza Sativa L ◽

Block Design ◽

Agricultural System ◽

Cost Ratio ◽

Energy Use Efficiency ◽

Direct Seeded ◽

Use Efficiency ◽

Input Ratio

To meet the basic food needs of expanding human population a productive sustainable agricultural system must become a major priority in Nepal. An on-farm study was conducted to investigate the economic and energy use efficiencies of rice (Oryza sativa L.) under direct seeded (DSR) and transplanted (TPR) conditions at Lamjung campus. Five varieties of rice differing in phenology and growth (viz. US382, Sukha dhan, NR10676, NR10490 and Khumal10) were tested in Randomized Complete Block Design under DSR and TPR conditions with three replications. The statistical resulted revealed that the average grain yield was highest for TPR-NR10490 (7.52t ha-1), whereas the lowest in DSR- NR10676 (1.96t ha-1). The output energy obtained from grain and biomass yield was highest under TPR-NR10490 (2.05x105MJ ha-1) followed by the lowest in DSR-NR10676 (7.35x104MJ ha-1). In TPR-NR10490 the most energy use efficiency (output-input ratio of 9.22) was obtained whereas in TPR-Sukha dhan, energy use efficiency (output-input ratio of 1.01) was least. Partial-factor productivity and nutrient uptake was highest in TPR-NR10490 and the lowest in DSR- NR10676. The maximum productivity and profitability was recorded in TPR-NR10490 while reverse in DSR-Sukha dhan. The benefit cost ratio was found highest in TPR- NR10490 (4.45) and lowest in DSR-Sukha dhan (2.31). From above result, NR10490 was found to be the best variety under transplanted condition.Int J Appl Sci Biotechnol, Vol 4(2): 172-177

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