Modeling Nitrogen Mineralization in Paddy Soils of Shanghai RegionEnglish Full Text

LI Hui-Lin, HAN Yong and CAI Zu-Cong Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences, P. O. Box 821, Nanjing 210008 (China). E-mail: lihuilin@issas.ac.cn

Abstract: Six paddy soils of Shanghai, China, were studied after 120 days of anaerobic incubation at 25 ℃ and 35 ℃. Four models, the effective accumulated temperature model, the one-component first-order exponential model （the one-pool model）, the two-component first-order exponential model （the two-pool model）, and the two-component first-order plus zero-order exponential model including a constant term （the special model）, were fitted to the data of observed mineral-N during incubation using non-linear regression procedures. The two-pool model and the special model gave the best fits amongst the four models, and parameters in the special model were more reasonable than those in the other three. Results showed that the special model gave a better prediction of nitrogen mineralization under flooded conditions than the other three models.

Keywords：

anaerobic incubation; nitrogen mineralization; paddy soil; simulation model;

Series：
(D) Agriculture
Subject：
Fundamental Science of Agriculture; Agronomy
Classification Code：
S153

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Modeling Nitrogen Mineralization in Paddy Soils of Shanghai RegionEnglish Full Text

LI Hui-Lin, HAN Yong and CAI Zu-Cong Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, the Chinese Academy of Sciences, P. O. Box 821, Nanjing 210008 (China). E-mail: lihuilin@issas.ac.cn

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