Evaluation of Growth Parameters of Rice (Oryza sativa L.) under Lateritic Soil of Jharkhand in Response to Silicon Sources and Levels

2020 ◽  
Keyword(s):  
Oryza Sativa ◽  
Growth Parameters ◽  
Oryza Sativa L ◽  
Lateritic Soil ◽  
Silicon Sources

scholarly journals Biological activity of chitosan inducing resistance efficiency of rice (Oryza sativa L.) after treatment with fungal based chitosan

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Vethamonickam Stanley-Raja ◽  
Sengottayan Senthil-Nathan ◽  
Kanagaraj Muthu-Pandian Chanthini ◽  
Haridoss Sivanesh ◽  
Ramakrishnan Ramasubramanian ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Growth Parameters ◽  
Oryza Sativa L ◽  
Management Strategies ◽  
Pathogen Resistance ◽  
Protective Agent ◽  
Rice Varieties ◽  
Fungal Chitosan ◽  
Kinetics Of ◽  
Better Than

AbstractReduced pathogen resistance and management of the left-over rice stubble are among the most important challenges faced in rice cultivation. A novel and eco-friendly strategy to synthesise ‘Fungal Chitosan’ (FC) from Aspergillus niger using rice straw could serve as a sustainable treatment approach to improve both disease resistance and yields, while also effectively managing the rice stubble waste. The FC treatment promoted germination as well as growth parameters in rice varieties, TN1 (high yielding-susceptible) and PTB33 (low yielding-resistant) better than a commercial chitosan (PC). Treatments of exogenously applied FC to plants produced direct toxicity to Xoo, and reduced the BLB disease index by 39.9% in TN1. The capability of FC to trigger a cascade of defense pathways was evident from the measurable changes in the kinetics of defense enzymes, peroxidase (POD) and polyphenol oxidase (PPO). FC treatment increased levels of POD in TN1 by 59.4%, which was 35.3% greater than that of untreated PTB33. Therefore, the study demonstrated the effectiveness of FC treatments for use in agriculture as a potential biostimulant as well as protective agent against bacterial leaf blight, BLB, of rice (Oryza sativa) that could be produced from stubble waste and improve rice stubble management strategies.

scholarly journals Effect of nitrogen scheduling in early and late planted medium duration rice (Oryza sativa L.)

2021 ◽  
Vol 23 (3) ◽  
pp. 279-285
Author(s):  
Keyword(s):  
Oryza Sativa ◽  
Growth Parameters ◽  
Oryza Sativa L ◽  
Growth Yield ◽  
Research Station ◽  
Dry Matter Accumulation ◽  
N Application ◽  
Yield Attributes ◽  
Late Planting ◽  
Four Levels

A field experiment on rice (Oryza sativa L.) crop was conducted at Rice Research Station, Kaul (Kaithal), India during kharif season of 2017 and 2018 to evaluate the optimum schedule of nitrogen application in the rice grown under early and late planting conditions. The treatments consisted of three timings of transplanting (3rd week of June, 1st week of July and 3 rd week of July), four levels of N (90, 120, 150 and 180 kg Nha-1) and four timings of N fertilizer application (½ at transplanting + ½ at 21 DAT, ½ at 21 DAT + ½ at 42 DAT, 1/3 at transplanting + 1/3 at 21 DAT + 1/3 at 42 DAT and LCC based N supply) and were laid out in split-plot design with transplanting time and N levels in main plots and N application time in sub-plots. The growth parameters (plant height, number of tillers/m2 and dry matter accumulation/m2), yield attributing characters (number of panicles/m2 and grains/panicle) and yield (grain and straw yield) of rice crop reduced significantly under late planting (3rd week of July) as compared to that under the two earlier plantings (3rd week of June and 1stweek of July) whereas the two earlier plantings were at par in respect of these parameters. The growth, yield attributes and the yield increased with every increase in N application rates but the increase was significant up to 150 kg Nha-1. The highest yield was (7.33 tha-1), however, obtained with the crop transplanted early (up to1st week of July) and supplied with 150 kg Nha-1.Application of N in three equal splits (at 0, 21 and 42 DAT or as per LCC schedule), being at par, resulted into higher yield (grain and straw) than the N application in two equal splits. The net returns and B: C ratio increased appreciably with increase in N application levels upto 150 kg Nha-1 obviously due to increase in crop yield.

scholarly journals Growth Analysis Of Brri Dhan-44 (Oryza Sativa L.) Following 2,3,5 Tri-Iodo Benzoic Acid Application

2015 ◽  
Vol 41 (1) ◽  
pp. 67-73
Author(s):  
AMM Golam Adam ◽  
Rasedul Islam ◽  
Hasna Hena Begum ◽  
Kamrun Naher
Keyword(s):  
Oryza Sativa ◽  
Benzoic Acid ◽  
Significant Variation ◽  
Growth Analysis ◽  
Positive Response ◽  
Growth Parameters ◽  
Oryza Sativa L ◽  
Pot Experiment ◽  
Growing Period

A pot experiment was conducted to investigate the effect of different concentrations (0,10, 25, 50 and 100 ppm) of 2,3,5 Tri-iodo benzoic acid (TIBA) on growth of BRRI dhan-44. With few exceptions LA, LAR, SLA and LAD showed almost similar trend andincreased due to 10 ppm at all stages. Whereas, other treatments showed a decrease inmost cases. Significant variations were observed at 40 DAS in LA, at 20 and 40 DAS inLAR and throughout the growing period of SLA and LAD. Significant increase wasobserved in SLW at concentration higher than 10 ppm TIBA. Plants treated with 25 ppmTIBA produced the highest SLW after 10 DAS. Maximum NAR was also recorded from25 ppm at all phases of growth and varied significantly at 20-30 DAS. Application ofTIBA had positive response on CGR in the majority cases and significant variation wasobserved at the period of 0-10 and 50-60 DAS. The RGR responded similarly like CGR,but varied significantly in all cases except at 10-20 DAS. After the period of 20-30 DAS,BMD were found to increase following all treatments excluding 50 ppm and significantvariations were observed all over the growing period. Out of five treatments, 10 ppmTIBA showed better responses in the majority of growth parameters. Asiat. Soc. Bangladesh, Sci. 41(1): 67-73, June 2015

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