Tofu by-product soy whey substitutes urea: Reduced ammonia volatilization, enhanced soil fertility and improved fruit quality in cherry tomato production
文献类型： 外文期刊
作者： Dai, Yiqiang 1 ; Wang, Zhe 1 ; Li, Jing 2 ; Xu, Zhuang 1 ; Qian, Cong 2 ; Xia, Xiudong 1 ; Liu, Yang 3 ; Feng, Yanfang 2 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Agroprod Proc, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base,Minist Sci & Technol, Nanjing 210014, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Key Lab Agroenvironm Downstream Yangtze Plain, Key Lab Integrated Planting & Breeding,Minist Agr, Nanjing 210014, Peoples R China
3.Jiangsu Acad Agr Sci, Inst Agr Informat, Nanjing 210014, Peoples R China
4.Nanjing Agr Univ, Coll Food Sci & Technol, Nanjing 210095, Peoples R China
关键词： Soy whey; Urea substitute; Cherry tomato; NH 3 volatilization; Soil dissolved organic matter
期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：8.3； 五年影响因子：8.2 ）
ISSN： 0013-9351
年卷期： 2023 年 226 卷
页码：
收录情况： SCI
摘要： Soy whey is an abundant, nutrient-rich and safe wastewater produced in tofu processing, so it is necessary to valorize it instead of discarding it as sewage. Whether soy whey can be used as a fertilizer substitute for agri-cultural production is unclear. In this study, the effects of soy whey serving as a nitrogen source to substitute urea on soil NH3 volatilization, dissolved organic matter (DOM) components and cherry tomato qualities were investigated by soil column experiment. Results showed that the soil NH4+-N concentrations and pH values of the 50% soy whey fertilizer combined with 50% urea (50%-SW) and 100% soy whey fertilizer (100%-SW) treatments were lower than those of 100% urea treatment (CKU). Compared with CKU, 50%-SW and 100%-SW treatments increased the abundance of ammonia oxidizing bacteria (AOB) by 6.52-100.89%, protease activity by 66.22-83.78%, the contents of total organic carbon (TOC) by 16.97-35.64%, humification index (HIX) of soil DOM by 13.57-17.99%, and average weight per fruit of cherry tomato by 13.46-18.56%, respectively. Moreover, soy whey as liquid organic fertilizer reduced the soil NH3 volatilization by 18.65-25.27% and the fertilization cost by 25.94-51.87% compared with CKU. This study provides a promising option with economic and envi-ronmental benefits for soy whey utilization and cherry tomato production, which contributes to the win-win effectiveness of sustainable production for both the soy products industry and agriculture.
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