Effects of nitrogen deposition rates and frequencies on the abundance of soil nitrogen-related functional genes in temperate grassland of northern China
Qiushi Ning, Qian Gu, Jupei Shen, Xiaotao Lv, Junjie Yang, Ximei Zhang, Jizheng He, Jianhui Huang, Hong Wang, Zhihong Xu, Xingguo Han
Journal of Soils and Sediments | SPRINGER HEIDELBERG | Published : 2015
Purpose: Microbial processes driving nitrogen (N) cycling are hot topics in terms of increasing N deposition. Abundances of N-related functional genes (NFG) can be most responsive to N deposition and commonly used to represent N transformation rates. However, empirically simulated N deposition has been exclusively conducted through large and infrequent N fertilization, which may have caused contrasting effects on NFGs. Therefore, experiments with small and frequent N additions closed to natural deposition are necessary. Materials and methods: Independently manipulated N addition rates (i.e., 0, 5, 10, 15, 20, and 50 g N m year ) and two frequencies (2 times per year addition as conventional..View full abstract
Awarded by Strategic Priority Research Program of the Chinese Academy of Sciences
Awarded by National Natural Science Foundation of China
We thank Jianjun Chen, Jian Xu, Shuchao Wang, and Dongsheng Miao, for the assistance in sampling and sample measurement. This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB15010401 and XDB15010403) and the National Natural Science Foundation of China (31170433 and 31307337).