1. National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Tai’an, Shandong 271018, China
2. State Key Laboratory
of Nutrition Resources Integrated Utilization, Kingenta Ecological
Engineering Group Co., Ltd., Linshu, Shandong 276700, China
3. Zhongde Fertilizer
(Pingyuan) Co. Ltd., De’zhou, Shandong 253100, China