کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4425931 | 1309116 | 2010 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Tracking nitrogen losses in a greenhouse crop rotation experiment in North China using the EU-Rotate_N simulation model Tracking nitrogen losses in a greenhouse crop rotation experiment in North China using the EU-Rotate_N simulation model](/preview/png/4425931.png)
Vegetable production in China is associated with high inputs of nitrogen, posing a risk of losses to the environment. Organic matter mineralisation is a considerable source of nitrogen (N) which is hard to quantify. In a two-year greenhouse cucumber experiment with different N treatments in North China, non-observed pathways of the N cycle were estimated using the EU-Rotate_N simulation model. EU-Rotate_N was calibrated against crop dry matter and soil moisture data to predict crop N uptake, soil mineral N contents, N mineralisation and N loss. Crop N uptake (Modelling Efficiencies (ME) between 0.80 and 0.92) and soil mineral N contents in different soil layers (ME between 0.24 and 0.74) were satisfactorily simulated by the model for all N treatments except for the traditional N management. The model predicted high N mineralisation rates and N leaching losses, suggesting that previously published estimates of N leaching for these production systems strongly underestimated the mineralisation of N from organic matter.
Journal: Environmental Pollution - Volume 158, Issue 6, June 2010, Pages 2218–2229