灌溉排水学报2025，Vol.44Issue(7)：10-17,8.DOI:10.13522/j.cnki.ggps.2025088
水稻幼苗生长及水分利用效率最优的断根组合研究
Optimal root pruning to promote growth and water use efficiency of rice seedlings
摘要
Abstract
[Background and Objective]Improving water use efficiency in agriculture is a critical to alleviating global water stress.As agriculture consumes approximately 62%of global water,optimizing agricultural water use is essential for sustainable resource management.In the soil-plant-atmosphere continuum(SPAC),water transport in soil-root system is a key water cycle component and has attracted increasing research attention.Recent studies have shown that rational an approximate root pruning can improve plant water use efficiency,offering promising strategies for water-efficient agriculture.However,study on root pruning in rice remains limited,with most studies focusing on either timing or intensity,while ignoring their combined effects.This study aims to address this gap.[Method]A field experiment was conducted using two rice varieties,Jingzhan 1 and Luhan 639.Root pruning was performed on the 7 th,9 th,and 11 th day after germination by cutting the root at 1.5 cm from the root tip,removing half of the root,and retaining 2 cm root segment.An unpruned root treatment was the control.Overall,there were eight treatments,which were arranged in a randomized design with three replicates each.Key indicators such as seedling vigor index,root-to-shoot ratio,photosynthetic traits,and water use efficiency were measured during the.Using the membership function method,seven variables were used to comprehensively assess the impact of different pruning treatments.[Result]For the Jingzhan 1 variety,pruning the root at 1.5 cm from the root tip on the 9 th day after germination resulted in the greatest improvement in seedling growth and water use efficiency.For the Luhan 639 variety,removing half of the root on the 9 th day after germination produced the best results.[Conclusion]Root pruning,when applied at the optimal time and intensity,can significantly enhance rice seedling growth and water use efficiency.This study provides practical guidelines for improving water-efficient rice cultivation and contributes to the broader goal of sustainable agricultural water management.关键词
水稻幼苗/断根组合/隶属函数法/水分利用效率Key words
rice seedlings/root cutting combination/membership function method/water use efficiency分类
农业科技引用本文复制引用
朱梅,胡晨帆,刘硕硕,林诗淼,刘靖喆..水稻幼苗生长及水分利用效率最优的断根组合研究[J].灌溉排水学报,2025,44(7):10-17,8.基金项目
安徽省自然科学基金项目(2308085US06,KJZX2022267) （2308085US06,KJZX2022267）
安徽省高等学校科学研究重点项目(2022AH050905) （2022AH050905）
安徽省教育厅质量工程项目(2022cxtd042) （2022cxtd042）
