- 相關(guān)推薦
Balanced nitrogen economy as a flexible strategy on yield stabilizing and quality of aquatic food crops in wetland ecosy
In wetland ecosystem, nitrogen along with other elements and its management is most imperative for the production of so many aquatic food, non-food and beneficial medicinal plants and for the improvement of soil and water characteristics. With great significant importance of INM (integrated nutrient management) as sources, emphasizing on management on nitrogen as a key element and its divergence, a case study was undertaken on such aquatic food crops (starch and protein-rich, most popular and remunerative) in the farmers' field of low-lying randomized block design, where, three important aquatic food crops (water chestnut (Trapa bispinosa Roxb.), makhana (Eurya/e ferox Salisb.) and water lily (Nymphaea spp.) as major factor and eleven combinations of organic and inorganic sources of nutrients as sub-factor was considered in the experiment. It revealed from the results that the production of fresh kernels or nuts of water chestnut (8.57 t ha-1), matured nut yield of makhana (3.06 t ha-1) and flower stalks of water-lily as vegetables (6.38 t ha-1) including its nutritional quality (starch, protein, sugar and minerals) was remarkably influenced with the application of both organic (neem oilcake @ 0.2 t ha-1) and inorganic sources (NPK @ 30:20:20 kg ha-1 along with spraying of NPK @ 0.5% each over crop canopy at 20 days interval after transplanting) than the other INM combinations applied to the crops. Among the crops, highest WCYE (water chestnut yield equivalence) exhibited in makhana due to its high price of popped-form in the country, which is being exported to other countries at now. Sole application of both (organic and inorganic sources) with lower range did not produce any significant outcome from the study and exhibited lower value for all the crops.Besides production of food crops, INM also greatly influenced the soil and water characterization and it was favourably reflected in this study. The physico-chemical characteristics of soil (textural class, pH, organic carbon, organic matter, ammoniacal nitrogen, nitrate nitrogen, available nitrogen, phosphorus and potassium) are most important and contributed a significant improvement due to cultivation of these aquatic crops. Analysis of such wet bodies represented the water characteristics (pH, BOD, COD, CO3-, HCO3-, NO3-N, SO4-S and Cl-) were most responsive,adaptable and quite favourable for the cultivation of these crops in this vast waste unused wetlands for the mankind without any environmental degradation.
作 者： A. M. Puste P. K. Sarkar D. K. Das 作者單位： A. M. Puste,P. K. Sarkar(Department of Agronomy, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya (Agricultural University) Mohanpur -741 252,Nadia, West Bengal, India)D. K. Das(Department of Agricultural Chemistry and Soil Science, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya (Agricultural University) Mohanpur - 741 252, Nadia, West Bengal, India)
刊 名： 中國(guó)科學(xué)C輯（英文版） SCI 英文刊名： SCIENCE IN CHINA SERIES C (LIFE SCIENCES) 年，卷(期)： 2005 48(z2) 分類號(hào)： P5 關(guān)鍵詞： aquatic food crops INM nitrogen soil & water characterization economics wetland ecosystem.Abbreviations: AAS Atomic absorption spectrophotometer【Balanced nitrogen economy as a flexi】相關(guān)文章：
平衡飲食 Balanced Diet01-16
Black Market(Underground Economy) 黑市05-04
Observations on carbon and nitrogen content of suspended matter in aheadwater stream in Hong Kong04-26
An important way to build a new socialistic countryside: developing circular economy04-26
Development of resource-conserving society:from the perspective of circular economy04-26
Removal of high concentrated ammonia nitrogen from landfill leachate by landfilled waste layer04-25
Guanzhong-Tianshui Economic Zone Approved to Shore up Shaanxi Economy04-26
Developing Space Manufacturing Industry To Serve National Economy And Promote Social Progress04-26