期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 613, 期 -, 页码 1339-1348出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2017.06.257
关键词
Soil acidification; VSD plus model; Cropland; Scenarios; Mitigation; China
资金
- Chinese National Basic Research Program [2015CB150400]
- National Natural Science Foundation of China [41425007, 31421092]
- Sino-Netherlands cooperative project Impacts of nitrogen inputs on acidification of agricultural and non-agricultural lands in China [13CDP009]
We applied the adapted model VSD+ to assess cropland acidification in four typical Chinese cropping systems (single Maize (M), Wheat-Maize (W-M), Wheat-Rice (W-R) and Rice-Rice (R-R)) on dominant soils in view of its potential threat to grain production. By considering the current situation and possible improvements in field (nutrient) management, five scenarios were designed: i) Business as usual (BAU); ii) No nitrogen (N) fertilizer increase after 2020 (N2020); iii) 100% crop residues return to cropland (100% RR); iv) manure N was applied to replace 30% of chemical N fertilizer (30% MR) and v) Integrated N2020 and 30% MR with 100% RR after 2020 (INMR). Results illustrated that in the investigated calcareous soils, the calcium carbonate buffering system can keep pH at a high level for > 150 years. In non-calcareous soils, a moderate to strong decline in both base saturation and pH is predicted for the coming decades in the BAU scenario. We predicted that approximately 13% of the considered croplands may suffer from Al toxicity in 2050 following the BAU scenario. The N2020, 100% RR and 30% MR scenarios reduce the acidification rates by 16%, 47% and 99%, respectively, compared to BAU. INMR is the most effective strategy on reducing acidification and leads to no Al toxicity in croplands in 2050. Both improved manure and field management are required to manage acidification in wheat-maize cropping system. (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据