DYNAMICS OF C, N, P AND S IN GRASSLAND SOILS - A MODEL
DYNAMICS OF C, N, P AND S IN GRASSLAND SOILS - A MODEL
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DOI：
10.1007/bf02180320
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发表时间：
1988-01-01
期刊：
影响因子：
4
通讯作者：
COLE, CV
中科院分区：
文献类型：
--
作者：
PARTON, WJ;STEWART, JWB;COLE, CV
我们开发了一个模型来模拟耕地和未耕地草地土壤中 C、N、P 和 S 的动态。该模型使用每月的时间步长，可以模拟长期（100 至 10,000 年）土壤有机质的动态。它用于模拟耕作（100 年）对土壤有机质动态、养分矿化和植物生产的影响，并模拟 10,000 年运行期间的土壤形成。通过将耕作对土壤有机质 C、N、P 和 S 动态的模拟影响与来自北部大平原地区的观测数据（美国）进行比较，验证了该模型。该模型正确预测了N和P是植物生产的主要限制养分，并模拟了系统对无机N、P和S肥料的响应。模拟结果表明，控制土壤有机质部分的 C:P 和 C:S 比率分别作为活性 P 和 S 水平的函数，使得模型能够正确模拟观察到的土壤中 C:P 比率的变化，并模拟变化的活性 P 和 S 水平对土壤 P 净矿化率的影响。
We have developed a model to simulate the dynamics of C, N, P, and S in cultivated and uncultivated grassland soils. The model uses a monthly time step and can stimulate the dynamics of soil organic matter over long time periods (100 to 10,000 years). It was used to simulate the impact of cultivation (100 years) on soil organic matter dynamics, nutrient mineralization, and plant production and to simulate soil formation during a 10,000 year run. The model was validated by comparing the simulated impact of cultivation on soil organic matter C, N, P, and S dynamics with observed data from sites in the northern Great Plains [USA]. The model correctly predicted that N and P are the primary limiting nutrients for plant production and simulated the response of the system to inorganic N, P, and S fertilizer. Simulation results indicate that controlling the C:P and C:S ratios of soil organic matter fractions as functions of the labile P and S levels respectively, allows the model to correctly simulate the observed changes in C:P ratios in the soil and to simulate the impact of varying the labile P and S levels on soil P net mineralization rates.