Yuan Yongheng, Li Faqinwei, Shimizu Naoto
Institute of Modern Agricultural Equipment, Xihua University, Chengdu 610039, China.
Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan.
Plants (Basel). 2025 Jan 7;14(2):149. doi: 10.3390/plants14020149.
This study explores the effects of a subcritical seawater treatment (SST) on buckwheat waste (BW), and the use of the hydrolysate as a liquid fertilizer to improve the growth of lettuce ( L.). Three temperature treatments (110 °C, 170 °C, 230 °C) were used for the SST, and the ionic composition in the seawater achieved the depolymerization and degradation of BW. The X-ray diffraction of the residual solids showed that the structure of BW was destroyed. Compared with seawater, the hydrolysate contained higher amounts of elements beneficial to plant growth, such as N, P, K, and organic compounds such as phenolics and sugars, as a result of the degradation of BW caused by the SST. The hydrolysate was tested as a liquid fertilizer (treatments H, H, H) to irrigate lettuce. The content of proteins, phenolics, and chlorophyll, as well as the weight of the lettuce in the H and H treatments, were significantly higher than those in the seawater and the H irrigation treatments ( < 0.05). The hydrolysate from the SST of BW, being rich in various organic and inorganic nutrients, can act as a liquid fertilizer that promotes the growth of lettuce, whereas hydrolysate from higher SST temperatures might inhibit the growth of lettuce, because of the excessive total nitrogen and organic acid.
本研究探讨了亚临界海水处理（SST）对荞麦废弃物（BW）的影响，以及将水解产物用作液体肥料以促进生菜（L.）生长的情况。SST采用了三种温度处理（110℃、170℃、230℃），海水的离子组成实现了BW的解聚和降解。残余固体的X射线衍射表明BW的结构被破坏。与海水相比，由于SST导致BW降解，水解产物含有更多对植物生长有益的元素，如氮、磷、钾，以及酚类和糖类等有机化合物。水解产物作为液体肥料进行测试（处理H、H、H）以灌溉生菜。H和H处理中生菜的蛋白质、酚类和叶绿素含量以及生菜重量均显著高于海水和H灌溉处理（<0.05）。BW经SST得到的水解产物富含各种有机和无机养分，可作为促进生菜生长的液体肥料，而较高SST温度下的水解产物可能会因总氮和有机酸过量而抑制生菜生长。
