Preparation and Properties of Coir-Based Substrate Bonded by Modified Urea Formaldehyde Resins for Seedlings
文献类型： 外文期刊
作者： Qu, Ping 1 ; Cao, Yun 3 ; Wu, Guofeng 3 ; Tang, Yuxin 1 ; Xia, Liru 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Nanjing 210014, Jiangsu, Peoples R China
2.Minist Agr, Key Lab Protected Agr Engn Middle & Lower Reaches, Nanjing 210014, Jiangsu, Peoples R China
3.Jiangsu Acad Agr Sci, Circular Agr Res Ctr, Nanjing 210014, Jiangsu, Peoples R China
关键词： Modified urea-formaldehyde resins; Substrate block; Tomato seedlings; Mechanical transplantation
期刊名称：BIORESOURCES （ 影响因子：1.614； 五年影响因子：1.923 ）
ISSN： 1930-2126
年卷期： 2018 年 13 卷 2 期
页码：
收录情况： SCI
摘要： In order to form a firm root plug for the mechanical transplantation, modified urea formaldehyde (UF) resins were applied to bond coir based substrate and form substrate blocks. The physical and chemical structure, thermal stability, and crystallinity of the substrate blocks before and after nursery seedlings were characterized. The results showed that the -NH2 and -OH in the substrate reacted with the modified UF resins to form macromolecular structures. There was almost no difference between the XRD spectra of substrate blocks before and after the growth of seedlings. The modified resins in the substrate block were cured in the form of colloidal particles. The substrate block contained 53.8 At% carbon, 15.0 At% nitrogen, and 23.5 At% oxygen. When compared with the original substrate, the height, stem diameter, root length, and leaf area of tomato seedlings grown in substrate block were improved by 56.1%, 43.3%, 1.3%, and 63.3%, respectively. The qualification percentage of the substrate block was 94.3%, which was well above that of the original substrate (83.4%) according to JB/T 10291 (2013) standards. The substrate block bonded by the modified UF resins was suitable for tomato seedlings growth.
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