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Effect of Integrated Nutrient Management on Growth and Productivity of Hybrid Rice

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Journal of Agricultural Science and Technology(B) 2015年第5期5卷 297-308页

作者： Spurti Mondal Malavathu Mallikarjun Mainak Ghosh dulal chandra Ghosh Jagadish Timsina Institute of Agriculture Visva-BharatL Sriniketan-731 236 West Bengal India Department of Agronomy Bihar Agricultural University Sabour Bihar 813 210 India The University of Melbourne 156-292 Grattan St. Parkvile Victoria 3010 Australia

Sustaining rice （Oryza sativa L.） productivity at high level is a great challenge, particularly in areas where rice productivity declines in spite of following recommended nutrient management practices. Nutrient management by integrating organic manures, inorganic fertilizers and biofertilizers may play an important role in improving and sustaining rice productivity. In this study, the authors tried to evaluate the suitable proportion of organic manures and inorganic fertilizers along with biofertilizer to maximize growth and productivity of hybrid rice on sandy-loam lateritic soils of West Bengal, India. The crop having 50% recommended dose of fertilizer （RDF）＋ 50% recommended dose of nitrogen （RDN） through mustard oil cake （MOC） and 75% RDF ＋ 25% RDN through MOC ＋ biofertilizer significantly increased plant height, number of tillers/m2, leaf area index （LAI）, dry matter accumulation （DMA） and crop growth rate （CGR） at initial and vital period of grain growth over those of 25% RDF ＋ 75% RDN through MOC and 100% RDN through MOC. The former two treatments also increased number of panicles/m2 and number of grains/panicle over those of only organic manuring （100% RDN） or only chemical fertilization （100% RDF） or 25% RDF ＋ 75% RDN through MOC. Crop with 75% RDF ＋ 25% RDN through MOC ＋ biofertilizer or 50% RDF ＋ 50% RDN through MOC produced 20.2%-33.8% higher grain yield and 11.0%-33.3% greater straw yield, and paid higher gross and net returns over other treatments. This study suggests growing hybrid rice with 75% RDF ＋ 25% RDN through MOC ＋ biofertilizer or 50% RDF ＋ 50% RDN through MOC for better growth, higher productivity and greater profit.

关键词： Hybrid rice biofertilizer imegrated nutrient management.

Effect of Biofertilizer on Growth, Productivity, Quality and Economics of Rainfed Organic Ginger （Zingiber officinale Rosc.） Bhaisey cv. in North-Eastern Region of India

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Journal of Agricultural Science and Technology(A) 2013年第2期3卷 83-98页

作者： Nongmaithem Jyotsna Mainak Ghosh dulal chandra Ghosh Wahengbam Ingo Meitei Jagadish Timsina College of Agriculture Central Agricultural University Imphal Manipur 795001 India Department of Agronomy Bihar Agricultural University Bihar 813210 India Institute of Agriculture Visva-Bharati Sriniketan-731236 West Bengal India IRRI-Bangladesh Office Banani DOHS Dhaka-1206 Bangladesh

Ginger yields in the NorthEastern region of India are low because the extremely poor farmers of the region can not afford to apply any chemical fertilizers and hence apply only the locally-available farmyard manures to ginger fields. Biofertilizers may be a cheap source of fertilizers for ginger cultivation as they can increase nutrient availability and improve rhizome quality and are required in small quantity. An investigation was thus undertaken to study the effect of different biofenilizers on growth, productivity, quality and economics of organic ginger grown under rainfed condition in NorthEastern region of India. Seed treatment with biofertilizers enhanced growth, increased rhizome yield by 19.0% and resulted in 32.4% higher net profit over control. Among the seed treatments, Azotobacter 5.0 kg ha＂l, Azospirillum 3.75 kg hal and Phosphotica 3.75 kg ha-1 were found optimum in improving most of the growth attributes, increasing yield components and yield of rhizome by 5.6%-13.5%. They also improved rhizome quality by increasing specific gravity, oleoresin and dry matter content and by decreasing crude fibre in rhizome. They resulted in higher net return by 4.0%-12.0% as compared to their other levels. Combined use of Azotobacter 5.0 kg hal along with Phosphotica 3.75 kg ha＂l was found to be the best treatment combination which greatly improved growth and yield attributes of ginger and ultimately recorded markedly higher productivity （2.0%-23.5%） over other combinations. This treatment combination improved the quality of the produce and resulted in the highest gross return （$4,905 hal）, net return （$3,525 hal） and return per dollar （3.55） invested in ginger cultivation. It appears that growing organic ginger by treating the seed rhizome with Azotobacter 5.0 kg ha-~ along with Phosphotica 3.75 kg ha-1 can result in good growth and high productivity of improved quality rhizome and ultimately result in maximum net profit and thus can be recommended for the NorthEas

关键词： Biofertilizers growth productivity quality economics ginger (Zingiber officinale Rosc.).

Effect of Biofertilizer on Biomass Productivity, Nutrient Balance and Soil Fertility in Rainfed Organic Ginger Production System

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Journal of Agricultural Science and Technology(A) 2013年第1期3卷 10-19页

作者： Nongmaithem Jyotsna Mainak Ghosh dulal chandra Ghosh, Wahengbam Ingo Meitei Jagadish Timsina College of Agriculture Central Agricultural University Imphal Manipur 795001 India Department of Agronomy Bihar Agricultural University Sabour 813210 Bihar India Institute of Agriculture Visva-Bharati Sriniketan 731236 West Bengal India IRRI-Bangladesh Office Banani DOHS Dhaka 1206 Bangladesh

Farmers of North-Eastern India grow ginger organically and obtain low yield. Biofertilizer may help in increasing yield and maintaining soil fertility. An investigation made with different biofertilizers showed that seed treatment with biofertilizer increased biomass by 18.3%, enhanced N, P and K removal and improved short-term soil fertility status by increasing N and P balance and reducing negative K balance over control plots. Use of high dose （5.0 kg haL） of Azotobacter （a3） and medium dose （3.75 kg hal） of both Azospirillum （b2） and Phosphotica （c2） increased rhizome biomass by 6.8%-12.5% and shoot biomass by 5.6%-14.3% over other levels. They enhanced N, P and K removal by both rhizome and shoot when compared with other levels. The above biofertilizer treatments improved organic carbon and available N and P status of the soil by increasing N and P balance. The result showed overall strong negative K balance; but biofertilizer treatments greatly reduced the negative K balance in soil as compared to the control plots. Seed treatment with high level of Azotobacter along with medium level of Phosphotica （a3c2） produced the highest biomass yield （7.4 t hal）, increased N and P balance and fertility status in spite of hizh N, P and K removal.

关键词： Biofertilizer ginger productivity nutrient balance soil fertility.

Changes in Physicochemical and Sensory Qualities of “Goha” Strawberries Treated with Different Conditions of Carbon Dioxide

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Agricultural Sciences 2015年第3期6卷 325-334页

作者： dulal chandra Ae Jin Choi Jung Soo Lee Jinsu Lee Ji Gang Kim Postharvest Research Team National Institute of Horticultural and Herbal Science Rural Development Administration Suwon Republic of Korea

Harvested strawberry fruit is highly perishable because of its soft texture and microbial infestation during postharvest handling. The applications of carbon dioxide (CO2) gas on the quality parameters of strawberry harvested in winter season have shown better effects in several studies. However, very little information is available for the same in summer harvested strawberry. This study was aimed at finding an optimum concentration and duration of CO2 treatment in strawberry fruit var. “Goha” harvested in summer season to increase or maintain postharvest qualities. Fresh strawberries were treated with 15%, 30% and 50% CO2 for 1 or 3 h and then stored at 4?C for up to 13 days along with untreated control. Strawberry samples treated with 50% CO2 for 1 or 3 h and both 15% and 30% for 3 h had higher firmness than samples treated with both 15% and 30% for 1 h and control. In general, total soluble solids (TSS) slightly increased or maintained during storage in all samples except control. The values of pH slightly declined whereas titratable acidity showed opposite trends. However, there was no significant difference found among CO2 treated samples. Lightness (L*) of “Goha” samples with no CO2 treatment decreased gradually while it was almost maintained in CO2 treated strawberries. Strawberry samples treated with 15% CO2 for 3 h maintained better quality with higher scores of overall quality and visual texture until 9 days of storage. Samples treated with 15% CO2 for 3 h also received lower softening scores until 9 days of storage compared to other CO2 treated samples. These results showed that 15% CO2 for 3 h condition could be an effective postharvest treatment for maintaining quality of “Goha” strawberry.

关键词： Carbon Dioxide Firmness Quality Strawberry Storage

Magneto-Soret-Dufour thermo-radiative doublediffusive convection heat and mass transfer of a micropolar fluid in a porous medium with Ohmic dissipation and variable thermal conductivity

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Propulsion and Power Research 2022年第1期11卷 154-170页

作者： dulal Pal Bhuban chandra Das Kuppalapalle Vajravelu Department of Mathematics Siksha BhavanaVisva-Bharati UniversitySantiniketan731235West BengalIndia Department of Mathematics Rammohan College102/1 Raja Rammohan SaraniKolkata700009India Department of Mathematics Department of MechanicalMaterial and Aerospace EngineeringUniversity of Central FloridaOrlandoFL32816USA

This paper deals with developing a numerical boundary layer flow model to analyze convective heat transfer characteristics of a micropolar fluid past a vertical plate in a composite material with viscous-Ohmic dissipations in the presence of a transverse magnetic *** basic governing equations are solved numerically by using the Runge-Kutta-Fehlberg *** computed results reveal a reduction in the velocity,temperature,and microrotation profiles by increasing the Prandtl ***,the concentration distribution is enhanced by enhancing or decreasing Soret-Dufour parameter,and there seems to be decremented in the skin-friction coefficient values with Schmidt number.

关键词： Double diffusive convection Thermal radiation Micropolar fluid Soret-Dufour

A Study on Genetic Variability, Character Association and Path Co-Efficient Analysis on Morphological and Yield Attributing Characters of Taro [Colocasia esculenta (L.) Schott]

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American Journal of Plant Sciences 2016年第3期7卷 479-488页

作者： Dipaloke Mukherjee Md. Abdur Roquib Nanda dulal Das Soma Mukherjee Department of Food Science Nutrition and Health Promotion Mississippi State University Starkville MS USA Department of Plant Breeding Bidhan Chandra Krishi Viswavidyalaya Mohanpur India

The study investigated genotypic and phenotypic co-efficients of variation, heritability, genetic advance at 5% selection intensity and in percentage of population mean of nine characters (plant height, leaf number, length and width of leaf lamina, number and weight of cormels per plant, weight of corm per plant, dry matter percentage in the tubers and tuber yield per from 14 cultivars of taro [Colocasia esculenta (L.) Schott]). Results indicated highest genotypic co-efficient of variation for dry matter percentage (47.91), which was 95.78% of the phenotypic co-efficient of variation, whereas tuber yield per plant showed the widest range (819.37). Number of cormels per plant and dry matter percentage ehibited considerably higher heritability (84.90% and 91.70%, respectively) and genetic advance (81.19 and 79.00, respectively), indicating the potentiality of selection for improvement of such characters. These two characters were found to be positively correlated to tuber yield per plant. Path analysis revealed that weight of cormels per plant possessed the highest direct effect on tuber yield, indicating the importance of selection based on this character to increase tuber yield per plant.

关键词： Character Association Heritability Genotypic Co-Efficient of Variation Phenotypic Co-Efficient of Variation Tuber Crop