Wang Shaoli, Song Shengju, Yang Xuping, Xiong Zhengqi, Luo Chaoxing, Xia Yongxiu, Wei Donglu, Wang Shaobo, Liu Lili, Wang Hong, Sun Lifang, Du Lichao, Li Shaofeng
State Key Laboratory of Tree Genetics and Breeding, Experimental Center of Forestry in North China, National Permanent Scientific Research Base for Warm Temperate Zone Forestry of Jiulong Mountain in Beijing, Chinese Academy of Forestry, Beijing 100091, China.
R & D Department, China Academy of Launch Vehicle Technology, Beijing 100076, China.
Polymers (Basel). 2022 May 23;14(10):2122. doi: 10.3390/polym14102122.
In order to improve the survival rate of transplanted seedlings and improve the efficiency of seedling transplantation, we developed an environmental friendly polymer konjac glucomannan (KGM)/chitosan (CA)/polyvinyl alcohol (PVA) ternary blend soil consolidation agent to consolidate the soil ball at the root of transplanted seedlings. In the previous research, we found that although the prepared KGM/CA/PVA ternary blend soil consolidation agent can consolidate the soil ball at the root of the seedling, the medium solid content of the adhesive was high, which affects its spraying at the root of the seedling. At the same time, the preparation temperature of the KGM/CA/PVA ternary blend was also high. Therefore, to reduce the energy consumption and the cost of the KGM/CA/PVA ternary blend soil consolidation agent in the preparation process, this paper studied the influence of preparation conditions on the application performance of the environmental friendly polymer soil consolidation agent. We aimed to reduce the highest value CA content and preparation temperature of the KGM/CA/PVA ternary blend adhesive on the premise of ensuring the consolidation performance of the KGM/CA/PVA ternary blend adhesive on soil balls. It was prepared for the popularization and application of the environmental friendly polymer KGM/CA/PVA ternary blend soil consolidation agent in seedling transplanting. Through this study, it was found that the film-forming performance of the adhesive was better when the KGM content was 4.5%, the CA content was in the range of 2-3%, the PVA content was in the range of 3-4%, and the preparation temperature was higher than 50 °C. The polymer soil consolidation agent prepared under this condition has a good application prospect in seedling transplanting.
为了提高移栽幼苗的成活率，提高幼苗移栽效率，我们研制了一种环保型聚合物魔芋葡甘聚糖（KGM）/壳聚糖（CA）/聚乙烯醇（PVA）三元共混土壤固结剂，用于固结移栽幼苗根部的土球。在前期研究中，我们发现虽然制备的KGM/CA/PVA三元共混土壤固结剂能够固结幼苗根部的土球，但粘结剂的中等固含量较高，这影响了其在幼苗根部的喷洒。同时，KGM/CA/PVA三元共混物的制备温度也较高。因此，为了降低KGM/CA/PVA三元共混土壤固结剂在制备过程中的能耗和成本，本文研究了制备条件对环保型聚合物土壤固结剂应用性能的影响。我们的目标是在确保KGM/CA/PVA三元共混粘结剂对土球固结性能的前提下，降低KGM/CA/PVA三元共混粘结剂的最高CA含量和制备温度。这是为了环保型聚合物KGM/CA/PVA三元共混土壤固结剂在幼苗移栽中的推广应用而制备的。通过本研究发现，当KGM含量为4.5%、CA含量在2%-3%范围内、PVA含量在3%-4%范围内且制备温度高于50℃时，粘结剂的成膜性能较好。在此条件下制备的聚合物土壤固结剂在幼苗移栽中具有良好的应用前景。
