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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.).

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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.

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