Effects of liquid fertilizer and reduced application rate on rice growth, nutrient uptake, and rice yield during the tillering stage

作者：Lin Yin, Nai-Jie Feng, Dianfeng Zheng, Xiaole Du, Hang Zhou, Nana Yue, Xixi Yang, Ya-Nan Feng · 发表于：BMC Plant Biology · 年份：2025 · DOI：10.1186/s12870-025-07905-9 · 研究领域：Rice Cultivation and Yield Improvement、Soil Carbon and Nitrogen Dynamics、Polymer-Based Agricultural Enhancements

BACKGROUND: Liquid fertilizer is increasingly used in modern agriculture due to its high solubility and convenient application. However, the regulatory mechanism of liquid fertilizer on rice morphological construction, photosynthetic characteristics, and nutrient uptake during the tillering period is still unclear, and its impact on the final yield formation also needs to be further explored. RESULTS: In this study, ‘Huanghuazhan’ was selected as the experimental material, and four treatments were set up: HS (standard solid fertilizer application rate), HL (standard liquid fertilizer application rate, identical to the solid fertilizer application rate), HL-10% (10% reduction from the standard liquid fertilizer application rate), and HL-20% (20% reduction from the standard liquid fertilizer application rate) to systematically investigate the effects of liquid fertilizer and reduced application rate on rice during the tillering stage. The results showed that compared with the HS treatment, the HL, HL-10%, and HL-20% treatments significantly increased rice growth parameters, with aboveground dry weight increasing by 74.22%, 62.18%, and 4.23%, respectively. Meanwhile, liquid fertilizer and reduced application rate enhanced photosynthetic capacity and promoted carbohydrate synthesis. In addition, the aboveground N, P, K uptake, root N, P uptake in HL, HL-10%, and HL-20% treatments were all higher than those in the HS treatment. Compared with the HS treatment, the HL, HL-10%, and H...