Changsha Zheng Li Biological Technology Co., Ltd. relies on Hunan Agricultural University, Ningxia University and Chinese Academy of Sciences and other research institutes, specializing in research & development, manufacturing and trading of humic(humus) acid/huminsauren products for poultry/swine/aquaculture and other animal therapeutic nutritional ingredients /additives /supplements /material as well as fertilizers for nearly 15 years. Our factories are certified with ISO9001:2015 and inspected by ITS, SGS, TUV, AQM, BSCI etc. Our products are widely used in livestock and poultry feed, animal feed additives, aquatic animal protection, organic fertilizers, soil improvement, industrial ceramics and biomedicine industries... [ read more>>]