摘要
为探究赤霉素浸种对水稻幼苗水分利用效率的影响,以“荆占1号”水稻种子为试验材料进行浸种试验,设置赤霉素浸种时间12、18、24 h与浸种浓度0、50、100、150、200 mg/L共12个处理,3个对照组,分析赤霉素浸种对水稻幼苗根芽鲜干重、光合速率、蒸腾速率、相对含水量及水分利用效率的影响。结果表明:T7(150 mg/L赤霉素浸种18 h)处理水稻幼苗相对含水量、光合速率、水分利用效率最大,各指标相较于对照组分别增幅11.30%、179.46%、140.43%。根据熵权法计算水稻幼苗农艺指标综合值,T7处理组综合值最大,达0.8555。综上所述,“荆占1号”水稻种子在150 mg/L赤霉素溶液中浸种18 h有效促进了幼苗生长与干物质转化,并显著提高水稻幼苗水分利用效率,为提高水稻水分利用效率提供了理论依据。
To explore the effect of gibberellin soaking on the water use efficiency of rice seedlings,the soaking experiment was carried out with"Jingzhan No.1"rice seeds as the experimental material,and 12 treatments with gibberellin soaking time of 12,18 and 24 h and soaking concentrations of 0、50、100、150 and 200 mg/L,and 3 control groups were set up to analyze the effects of gibberellin soaking on the fresh and dry weights of roots and shoots,photosynthetic rate,transpiration rate,relative water content and water use efficiency of rice seedlings.The results showed that the relative water content,photosynthetic rate and water use efficiency of rice seedlings in T7(150 mg/L gibberellin soaking for 18 h)were the largest,and the indexes increased by 11.30%,179.46%and 140.43%,respectively,compared with the control group.The comprehensive value of agronomic traits,calculated using the entropy weight method,was highest in the T7 treatment group(0.8555).In conclusion,soaking"Jingzhan No.1"rice seeds in a 150 mg/L gibberellin solution for 18 h effectively promoted seedling growth and dry matter accumulation,and significantly improved the water use efficiency.This study provides a theoretical basis for enhancing rice water use efficiency.
作者
刘硕硕
朱梅
刘靖喆
时运佳
LIU Shuo-shuo;ZHU Mei;LIU Jing-zhe;SHI Yun-jia(School of Engineering,Anhui Agricultural University,Hefei 230036,Anhui Province,China)
出处
《节水灌溉》
北大核心
2025年第10期82-87,共6页
Water Saving Irrigation
基金
安徽省高等学校科学研究重点项目(2022AH050905)
安徽省教育厅质量工程项目(2022cxtd042)。
关键词
赤霉素
水稻幼苗
浸种时间
浸种浓度
熵权法
农艺指标
水分利用效率
gibberellin
rice seedlings
soaking time
soaking concentration
entropy weight method
agronomic indicators
water use efficiency
