Air warming and CO enrichment increase N use efficiency and decrease N surplus in a Chinese double rice cropping system.

Effectiveness of N might be modified in rice cultivation under future climate change with elevated atmospheric CO concentration ([CO]). At present, limited information is available to understand how plant N uptake and N use efficiency respond to elevated [CO] and/or temperature in Chinese double rice cropping systems. A four-year field experiment was therefore conducted using open-top chambers with varying [CO] (ambient, ambient +60 μmol mol) and varying temperature (ambient, ambient +2 °C) in Hubei Province, Central China.

A framework for assessing the effects of afforestation and South-to-North Water Transfer on nitrogen and phosphorus uptake by plants in a critical riparian zone.

The uptake of nitrogen (N) and phosphorus (P) by plants in riparian zones can significantly decrease the water pollution risk. Moreover, the vegetation area in riparian zone can be impacted by raising of water level and afforestation. As the largest reservoir in North China, the Miyun Reservoir is affected by the South-to-North Water Transfer (SNWT) and large-scale afforestation.

[Spatiotemporal dynamics of land cover in northern Tibetan Plateau with responses to climate change].

By using the 2001-2008 MOMS land cover products (MCDl2Ql) and based on the modified classification scheme embodied the characteristics of land cover in northern Tibetan Plateau, the annual land cover type maps of the Plateau were drawn, with the dynamic changes of each land cover type analyzed by classification statistics, dynamic transfer matrix, and landscape pattern indices. In 2001-2008, due to the acceleration of global climate warming, the areas of glacier and snow-covered land in the Plateau decreased rapidly, and the melted snow water gathered into low-lying valley or basin, making the lake level raised and the lake area enlarged. Some permanent wetlands were formed because of partially submersed grassland.