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Wolf, D.C., Legg, J.O. and Boutton, T.W. (1994) Isotopic Methods for the Study of Soil Organic Matter Dynamics. In: Weaver, R.W., Angle, S., Bottomly, P., Bezdicek, D., Smith, S., Tabatabai, A. and Wollum, A., Eds., Methods of Soil Analysis. Part 2. Microbiological and Biochemical Properties, SSSA, Madison, 865-906.

has been cited by the following article:

• TITLE: Effect of Composts Combined with Chemical N Fertilizer on Nitrogen Uptake by Italian Ryegrass and N Transformation in Soil

  AUTHORS: Nguyen Thanh Binh, Hoang Thi Quynh, Kazuto Shima

  KEYWORDS: Solids, Biosolids Compost, 15N Nitrogen Uptake, Mineralization, Immobilization

  JOURNAL NAME: Journal of Agricultural Chemistry and Environment, Vol.4 No.2, April 8, 2015

  ABSTRACT: Combining compost with sufficient chemical N fertilizer (CF) in agricultural lands is a popular practice to reduce the amount of inorganic nitrogen and accumulation of non-nutrient constituents in soils. A pot culture experiment was conducted to study the effects of 130 mg N of either solids waste compost (Scomp) or biosolids waste compost (Bcomp) complemented with 130 mg (CF, 1N) and 260 mg·N·pot-1 (CF, 2N) as 15N labeled (NH4)2SO4 (13.172 atom %) on growth and N uptake by Italian ryegrass. A separate soil incubation without plants was set up by only blends of Scomp and CF. The results from pot culture experiment show that total plant biomass and N uptake from Bcomp were significantly higher than Scomp alone. Scomp combined with CF improved yield and N uptake over those of Scomp alone. For Scomp + 1N treatment, plant nitrogen uptake derived from compost and CF accounted for 29% and 56% of added N from Scomp and CF, respectively. The incubation study indicates that 16.08 - 29.62 mg·N·kg-1·soil·day-1 from inorganic-N were immobilized into organic pools, while only 0.40 - 0.66 mg·N·kg-1·soil·day-1 from organic-N were mineralized to inorganic pools. Because a part of additional N could be tied up in organic form, combining solids compost with chemical N fertilizer therefore need to consider the effective use of compost-N.