2011年7-9月，乔云发副研究员到Horwath实验室交流学习；

2012-2013年，苗淑杰副研究员到Horwath实验室访学一年；

2014-2015年，尤孟阳博士和李禄军副研究员在Horwath实验室访学一年。

 来访：

2011年7月，韩晓增站长邀请William R. Horwath教授到海伦站学术交流，并做了题为“Turnover rate of C and N in soil relative with their fractions”的报告；

2013年9月，韩晓增站长邀请Martin Burger博士到研究所和海伦站进行访问与学术交流。Martin Burger博士做了题为“Using15N Stable Isotopes to Investigate Soil and Plant Processes“的学术报告。

2015年9月，Xia Zhu-Barker博士受韩晓增站长邀请到海伦站进行学术交流，并做了题为“Nitrous Oxide Emissions from Organic Waste Material Application in Agricultural Ecosystem”的报告。

与Horwath团队合作发表论文目录：

Li LJ, Han XZ, You MY,Horwath WR. 2013. Nitrous oxide emissions from Mollisols as affected by long-term applications of organic amendments and chemical fertilizers. Science of the Total Environment. 452-453: 302-308.

Qiao YF, Miao SJ, Han XZ, You MY,Zhu X,Horwath WR. 2014. The effect of fertilizer practices on N balance and global warming potential of maize-soybean-wheat rotations in Northeastern China. Field Crops Research. 161:98-106.

Qiao YF, Miao SJ,Silva LCR, Horwath WR. 2014. Understory species regulate litter decomposition and accumulation of C and N in forest soils: A long-term dual-isotope experiment. Forest Ecology and Management. 329: 318-327.

You MY, Burger M, Li LJ, Zou W, Li N, Qiao YF, Han XZ. 2014. Changes in soil organic carbon and carbon fractions under different land use and management practices after development from parent material of Mollisols. Soil Science. 179:205–210.