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Search Results: 1 - 10 of 4485 matches for " rice straw "
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Harnessing of Chemically Modified Rice Straw Plant Waste as Unique Adsorbent for Reducing Organic and Inorganic Pollutants  [PDF]
Khaled Mohamed Mostafa, Abdul Rahim Samarkandy, Azza Awad El-Sanabary
International Journal of Organic Chemistry (IJOC) , 2012, DOI: 10.4236/ijoc.2012.22022
Abstract: Conversion of rice straw (RS) as one of agricultural plant wastes (about 45% of the volume of rice production) to valuable industrial product was achieved, by grafting different amounts of dimethylaminoethyl methacrylate (DMAEM) on it using potassium permanganate/nitric acid redox system. This was done to obtain six levels of poly (DMAEM)—rice straw graft copolymers (PDMAEMRS) having different graft yields (expressed as N%) with increasing order and designated as (PDMAEMRS 1 to PDMAEMRS 6). The latter copolymers were dispersed in aqueous solution of heavy metal ions Cu (II) ions and filtered to form rice straw co-polymer—metal ions complex. Different factors affecting the heavy metal ions removal such as pH, extent of grafting, treatment time and rice straw dose were studied in detail. It was found from the obtained results that; the residual metal ions removal from their aqueous solutions increased with 1) increasing the extent of grafting of PDMAEMRS i.e. from PDMAEMRS 1 to PDMAEMRS 6; 2) increasing the pH of the metal ions solution complex from 1 to 8; 3) increasing the rice straw dosage from 0.50 to 2.0 g, then leveled off thereafter; 4) increasing the time of the reaction up to 20 minute then leveled off after that. On the other hand, Pb (II), Cd (II) and Hg (II) ions were also removed from their solutions with different extent. Furthermore, the prepared co-polymer could be recovered by washing the metal ions from the complex with weak acid 1 N HNO3 (pH 2) and the metal-binding activity of the rice straw was slightly reduced by this process. Finally, the ability of PDMAEMRS to remove three types of acid dyes from their solutions was also reported.
Improvement of Rice Straw for Ruminant Feed Through Unconventional Alkali Treatment and Supplementation of Various Protein Sources
SNO Suwandyastuti,M Bata
Journal of Animal Production , 2010,
Abstract: Various chemical treatments were conducted to increase the utilization of rice straw as feed for ruminant animals. Various sources of protein, minerals and energy should be added to improve the nutritive value of feeds. Two experiments were conducted in this study. The objective of the first experiments was to study the effect of chemical treatment on the ruminal fermentation products in cattle. Unconventional alkali treatment made from filtrate of a 10% rice hulls ash solution enriched with urea and minerals (treatment 1) increased volatile fatty acid (VFA) production, ammonia nitrogen (NH3-N) and rumen microbial protein synthesis (MPS). The maximum values of NH3-N production and rumen microbial protein synthesis were reached at 4 hours after incubation, while VFA was reached at 6 hours. The second experiment was conducted to study the increase of nutritive value of rice straw previously treated in experiment 1 through supplementation with various protein sources. Protein sources from the residues of vegetative oil production such as coconut, peanut and soybean showed higher responses compared to soy-sauce making residue and tofu making residue. The protein effluent production was highest (2.19 g/d) at a VFA/NH3-N ration of 37.74 (r = 0.912). It can be recommended that protein sources from agro-industrial wastes can be used to increase the nutritive value and utilization of rice straw as ruminant feed. (Animal Production 12(2): 82-85 (2010)Key Words: rice straw, rumen, fermentation
Cr(VI) Ions Removal from Aqueous Solutions Using Natural Adsorbents – FTIR Studies  [PDF]
Biswajit Singha, Tarun Kumar Naiya, Ashim kumar Bhattacharya, Sudip Kumar Das
Journal of Environmental Protection (JEP) , 2011, DOI: 10.4236/jep.2011.26084
Abstract: The ability of eight natural adsorbents were investigated for adsorptive removal of Cr(VI) from aqueous solutions. Various physico-chemical parameters such as pH, initial metal ion concentration, adsorbent dose level and equi-librium contact time were optimized in batch adsorption technique. A detailed Fourier Transform Infrared Spectrophotometer (FTIR) study of adsorbents and Cr(VI) loaded adsorbents at the optimized condition was carried out to identify the different functional groups that were responsible for the adsorption. The important functional groups like hydroxyl, alkene, aromatic nitro, carboxilate anion, silicon oxide, sulphonic acid etc. were present in the natural adsorbent and were responsible for the chemical adsorption of Cr(VI) from aqueous solutions. The sorption energy calculated from Dubinin-Radushkevich isotherm indicated that the adsorption process were chemical in nature.
Oilseed rape straw for cultivation of oyster mushroom
Gholamali Peyvast
Maejo International Journal of Science and Technology , 2008,
Abstract: Oyster mushroom [Pleurotus ostreatus var. sajor caju (Fr.) Singer] was grown on five substrates: rice straw, rice straw + oilseed rape straw (75:25, 50:50, and 25:75 dw/dw), and oilseed rape straw alone. Rice straw + oilseed rape straw (25:75) and oilseed rape straw were best for fruit body production of P. ostreatus. The time to fruiting for P. ostreatus was also shorter on oilseed rape straw. Protein content of the fruit bodies obtained with oilseed rape straw was highest among all substrates. Oilseed rape straw thus appears to be a suitable substrate for oyster mushroom production.
Effect of urea level and treating time on ruminal degradability of urea-treated rice straw evaluated by in sacco method
Promma, S.,Chatreewong, D.
Songklanakarin Journal of Science and Technology , 2006,
Abstract: An experiment was conducted to evaluate the dry matter disappearance and potential degradability of urea-treated rice straw (UTS). Five kg of non-glutinous rice straw (RS) was chopped and treated with urea solution and kept in a double sheet polyethylene bag. The ratio of RS to water was 1:1. The urea concentration was 4, 5 and 6% by weight of RS and the duration of treatment was 7, 14 and 21 days. There were 9 treatment combinations with 3 replications. The dry and ground UTS were weighted into nylon bags and incubated in 3 fistulated cows. The dry matter disappearance was detected at different incubation times. The result showed that CP content of UTS was higher than RS and the amount increased with the increasing level of urea. The longer treatment duration caused depletion in CP content. Nitrogen was lost as ammonia when UTS was dried, which led to the lower CP than fresh UTS. The duration of treating of 7, 14 and 21 days caused no-significant difference in potential degradability (71.61±2.59, 72.38±2.80 and 72.70±2.44%, respectively, P> 0.05), but 6% UTS has higher potential degradability than 4 % UTS (74.24± 0.53 and 69.84±1.03%, respectively, P< 0.05)
Nutrient Characteristics and Fermented Rice Straw Degradation by Lignolitic TLiD and BopR Inoculums
I Prihartini,Soebarinoto,S Chuzaemi,M Winugroho
Journal of Animal Production , 2009,
Abstract: The research has been conducted to evaluate the nutrition’s characteristic and degradation of rice straw fermented with lignolitic inokulum in different incubation time. Rice straw fermentation with lignolitik isolates increase the dry matter and crude protein content compare with dried fermented rice straw. On the other hand, fermentation decrease organic matter, crude fiber, and cellulose contents. The decreasing of OM, CF, and cellulose were lower than lignin. The fermentation with lignolitik inoculum increase the value of DM and OM degradation of rice straw in parameter non-soluble water fraction but degradable potentially(b), potensial of degradation (a+b) dan degradation time (c) BK dan BO but non significant to parameter water soluble fractions (a). Fermentation with lignolitik inoculum increase the nutritive value and degradation rice strwa and the best treatment was combination of TLiD dan BOpR inoculums in three days incubation. (Animal Production 11(1): 1-7 (2009) Key Words: rice straw, rice straw fermented, lignolitik, lignin biodegradation, nutrition
Application of Rice Straw Compost with Different Bioactivators on the Growth and Yield of Rice Plant
Yunita Barus
Jurnal Tanah Tropika , 2012,
Abstract: Turnover of organic matters to the soil can increase the efficiency of chemical fertilizers, improve the plant growthand sustain the environment. Field experiment was carried out in the Buyut Udik Village, Gunung Sugih District,Central Lampung from May to August 2009. Rice straw was composted by three kinds of decomposer (bioactivatorA, B, and C). Rice straw compost (2 Mg ha-1) was applied to the paddy-field soil that was planted by rice (Oryzasativa) of Ciherang Variety. The experiment was arranged in a randomized block design with three replicates. Theresults showed that application of rice straw compost reduced the numbers of empty grain per tiller compared tocontrol (without compost) in which control had the highest percentage of empty grain (15.9%). The application ofrice straw compost that was decomposed by bioactivator A gave the highest numbers of grain per panicle and yieldper plot as followed 162.5 seed and 33 kg plot-1, respectively. Application of various rice straw composts that weredecomposed by three kinds of bioactivator increased the rice grain up to 13-26% compared to control.
Effect of Rice Straw and Chemical Fertilizers on the Productivity and Economics of Boro Rice-Transplanted Aman Rice System
Naser H. M.,N. C. Basak,M. F. Islam
Journal of Biological Sciences , 2001,
Abstract: In two years trial at multi location testing site, Netrakona, Bangladesh with 8 different fertilizer and straw incorporation treatments positive yield and economic response. Treatment with 2/3 straw + recommended fertilizer for moderate yield goal gave the highest grain (4.90 t ha-1) and straw (5.46 t ha-1) yields followed by T6 i.e., the recommended fertilizer for high yield (4.74 t ha-1 grain and 5.32 t ha-1 straw). Like grain and straw yields highest gross return (TK.37030 ha-1), return above variable cost (TK.26127 ha-1) and benefit cost ratio (3.40) were obtained from T3.
Effect of Rice Straw Biochar on Soil Quality and the Early Growth and Biomass Yield of Two Rice Varieties  [PDF]
Alie Kamara, Hawanatu Sorie Kamara, Mohamed Saimah Kamara
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.68077
Abstract: Sustainable rice production in Sierra Leone faces serious constraints due to soil acidity, low cation exchange capacity, low nutrient contents accelerated mineralization of soil organic matter and soil loss by erosion (particularly on the uplands). One possible approach to addressing the soil constraints to rice production both on uplands and lowlands of Sierra Leone is the recycling of rice residues through biochar production and application to soils. A pot experiment was conducted to investigate the effects of application of biochar from rice residues on (i) soil physicochemical properties and (ii) the early growth characteristics of two rice varieties, NERICA L19 and ROK3. The experiment was arranged in a completely randomized design (CRD) with two biochar levels (0 and 15 g/kg soil) and two rice varieties in three replications. For the biochar treated soils (+biochar), 75 g rice straw biochar was applied to 5 kg air-dry soil (15 kg biochar/kg soil), mixed thoroughly and placed into perforated black polythene bags. Seeds of two rice varieties, NERICA L19 and ROK3 were planted on the treated and untreated soils for eight weeks. Application of biochar improved available phosphorus, exchangeable cations and cation exchange capacity in biochar treated soils compared to the control soil without biochar. Plant height, tiller number, and dry biomass weight of both rice varieties grown in soils amended with rice straw biochar were significantly higher than those on untreated soils. The most remarkable increase in plant growth characteristics as a result of biochar addition to soil was reflected in the biomass yield and tiller numbers. Dry shoot biomass for ROK3 rice variety varied significantly from a mean of 3.5 g (control) to 26.2 g (+biochar) while tiller numbers significantly varied from 10 (control) to 29.6 (+biochar). Similarly, for NERICA L19 rice variety, dry shoot biomass increased significantly from 4.5 g (control) to 22.7 g (+biochar) while tiller numbers increased significantly from a mean of 12.3 (control) to 30 (+biochar). Thus converting rice residues to biochar and applying to soil holds promise for improving rice production in Sierra Leone.
Pemanfaatan Bakteri Selulolitik dan Xilanolitik yang Potensial untuk Dekomposisi Jerami Padi
Hasrul Satria Nur,Anja Meryandini,Hamim
Jurnal Tanah Tropika , 2009,
Abstract: There were 3 prospective isolates of cellulolytic bacteria resulted from the total of 31 isolates we found, i.e. C4-4, C5-1, and C11-1. Four combinations of bacteria including C4-4 + Xilanolytic (A), C5-1 + Xilanolytic (B), C11-1 + Xilanolytic (C), 45I-3 + 234P-16 (D), and control (E, without bacteria) were applied as inoculant of rice straw decomposition. In the incubation period the pH-H2O value of C4-4 + Xilanolytic (A) and C5-1 + Xilanolytic (B) was relatively stable. The C/N ratio of all treatments decreased after 3 weeks of incubation. The C/N ratio value of A, B, C, D and E treatments were 22.48, 23.43, 27.49, 26.82, and 29.53 respectively. Decomposition rate all of combination treatments were faster than the control. The content of macro-micro nutrient of A, B, C, and D treatments increased in the end of measurement, while the control didn’t. The physical characteristic of substrate after incubation was better in A and B treatments that others. The result indicated that the combination of C4-4 + Xilanolytic (A) and C5-1 + Xilanolytic (B) bacteria were the best combination for decomposition of rice straw.
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