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With the present understanding that decomposing straw may not only affect soil properties, but possibly greenhouse gas emissions as well, focus among environmental researchers has gradually expanded to include understanding of decomposition rate and stability of straw of different plants in different soils under different management conditions. Against such a background, a short-term (60 days) greenhouse simulation experiment was carried out to study the effects of straw placement, external mineral N source and tillage on straw decomposition of maize and cotton in two contrasting soils, a red soil (Ferrasol) and a black soil (Acrisol). The treatments included straw addition only (T1); straw addition + mineral N (T2); and straw addition + tillage (T3). Straw was either buried in the soil or placed on the surface. Sampling was done every 15 days. Placement, addition of external mineral N sources (urea, 46% N), straw type, soil type and exposure duration (15, 30, 45 and 60 days) affected straw decomposition
With the present understanding that decomposing straw may not only affect soil properties, but possibly greenhouse gas emissions as well, focus among Against such a background, a short-term (60 days) greenhouse simulation experiment was carried out to study the effects of straw placement, external mineral N source and tillage on straw decomposition of maize and cotton in two contrasting soils, a red soil (Ferrasol ) and a black soil (Acrisol). The treatments included straw addition only (T1); straw addition + mineral N (T2); and straw addition + tillage (T3). Straw was either buried in the soil or placed on the surface. Placement, addition of external mineral N sources (urea, 46% N), straw type, soil type and exposure duration (15, 30, 45 and 60 days) affected straw decomposition