Nitrogen and Phosphorus cycling and Nutrient Use Efficiency Improvement in Agriculture and Animal Husbandary Ecosystem The Radiant Agro-ecological Engineering and Its Function--A Case Study From Xinghuo Husbandary Farm Analysis of agro-ecosystem footprint of flux in semi-arid areas Mineralization characteristics of soil organic carbon under long-term fertilization management Characteristics of net ecosystem exchange and environmental factors of rice-wheat rotation system in the Yangtze River Delta of China Analysis of N2O emissions from the agro-ecosystem in Fujian Province