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  • 1
    Electronic Resource
    Electronic Resource
    Nitrogen utilization by lowland rice as affected by fertilization with urea and green manure (1994)
    Springer
    Nutrient cycling in agroecosystems 40 (1994), S. 215-223 
    Details
    ISSN: 1573-0867
    Keywords: 15N ; residual N ; Sesbania ; urea
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Field studies were conducted during two consecutive wet seasons in flooded rice (Oryza sativa L.) to determine the effect of green manure on urea utilization in a rice-fallow-rice cropping sequence. Replicated plots were fertilized with 60 to 120 kg of urea N ha−1 in three split applications (50, 25 and 25%) with or without incorporation of dhaincha (Sesbania aculeata L.) (100 kg N ha−1). During the first crop only 31 to 44% of the urea added was used by the rice. Incorporatingin situ grown dhaincha (GM) into the soil at transplanting had little effect on urea utilization. Forty-four to 54% of the N added was not recovered in the soil, rice crop, or as nitrate leachate during the first cropping season. Incorporation of GM had no effect on fertilizer N recovery. Only about 2% of the urea N added to the first rice crop was taken up by the second rice crop and, as in the first crop, the GM had little effect on residual N, either in amount or utilization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00750468
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Yield performance of rainfed lowland rice as affected by nursery fertilization under conditions of intermediate deepwater (15–50 cm) and flash floods (1991)
    Springer
    Plant and soil 132 (1991), S. 65-71 
    Details
    ISSN: 1573-5036
    Keywords: fertilization ; flooding ; flood tolerance ; intermediate deepwater ; N fertilizer ; rice nursery ; rice submergence ; rice transplanting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effect of simulated overhead flash flooding for 10 days at an early vegetative stage of rice grown from transplanted seedlings with and without fertilizer N applied to the nursery soil, was studied under intermediate deepwater conditions at Cuttack, India. Application of 100 kg fertilizer N per ha to nursery soil at sowing or in splits improved seedling vigor measured as dry weight and N concentration of the plant tissue at transplanting. The crop raised with healthy and vigorous N-fertilized seedlings was more tolerant to ravages of flooding and showed a better stand with more profuse tillering and less mortality. The grain yield of the semi-tall cultivar Suresh was not affected by N applied to the nursery soil under partial submergence of 70±2 cm water depth. However, the semi-dwarf cultivar Gayatri planted with N-fertilized seedlings established better in the early stages and produced more panicles and a two- to five-time higher grain yield. The beneficial effect of nursery fertilization was less marked under natural flooding conditions (25–40 cm). Transplanting semi-dwarf rice with healthy and vigorous seedlings obtained by fertilizing nursery seed-bed could therefore, be a very productive low-cost technology for farmers growing rice under conditions of intermediate deepwater and flash floods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00011013
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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