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打顶后施用生长素(IAA)和钾肥对烤烟碳氮代谢的影响 预览 被引量:30

Effects of applying indole-3-acetic acid (IAA) and potassium on carbon and nitrogen metabolism of flue-cured tobacco after topping.
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摘要 研究了不打顶(T1)、打顶(T2)、打顶+追施K2SO4(T3)、打顶+涂抹生长素1次(T4)、打顶+追施K2SO4+涂抹生长素1次(T5)、打顶+追施K2SO4+涂抹生长素2次(T6)等6种调控措施对烤烟碳氮代谢的影响。结果表明:由打顶当天到打顶后30d,烤烟淀粉酶活性总体上表现为下降后又略有上升的趋势,转化酶(INV)活性则逐渐降低;2种酶活性均以T6最高,T1最低,且差异达到极显著水平;除T1外,各处理在打顶后的淀粉含量逐渐升高,总糖含量则呈现上升后又逐步下降的变化,至打顶后30d,淀粉和总糖含量均以T6最高,T1最低;随生育时期延长,硝酸还原酶(NR)活性和蛋白质含量均表现为逐渐下降的趋势。打顶后30d,T6的NR活性和蛋白质含量均为最高;在打顶后30d,以T5的NR/INV比值最大。打顶当天在顶端涂抹生长素,同时追施K2SO4肥,可促进烤烟生长和碳氮代谢。 This paper studied the carbon and nitrogen metabolism of flue-cured tobacco under effects of six treatments, i. e., no topping (T1), topping (T2) , topping + topdressing K2SO4 ( T3 ), topping + spraying IAA ( indole-3-acetic acid) 1 time ( T4 ), topping + topdressing K2SO4 + spraying IAA 1 time ( T5 ), and topping + topdressing K2SO4 + spraying IAA 2 times ( T6 ). The results showed that from the day of topping to the following 30 days, the amylase activity of flue-cured tobacco had a trend of decreasing first and increasing slightly then, while invertase (INV) activity decreased gradually. The activities of these two enzymes were the highest in T6 and the lowest in T1, with a significant difference. Except in T1, the starch content in all treatments increased gradually, and the total sugar content increased first but decreased then. At the 30th day after topping, the starch and total sugar contents were the highest in T6 , and the lowest in T1. Nitrate reductase (NR) activity and protein content had a decreasing trend with the growth of tobacco, and were the highest in T6 at the 30th day after topping. Treatment T5 had the highest ratio of NR/INV after 30 days of topping. Spraying IAA at the top of tobacco plant on the day of topping combined with K topdressing could promote the growth and the carbon and nitrogen metabolism of flue-cured tobacco.
作者 许自成 张婷 卢秀萍 张延军 XU Zi-cheng , ZHANG Ting , LU Xiu-ping , ZHANG Yan-jun ( 1College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China ; 2 Tobacco Quality Supervision and Test Station of Hubei Province, Wuhan 430030, China ; 3yunnan Institute of Tobacco Science, Yuxi 653100, Yunnan, China).
出处 《生态学杂志》 CAS CSCD 北大核心 2007年第4期 461-465,共5页 Chinese Journal of Ecology
基金 国家烟草专卖局重点科技攻关项目(110200401017)、河南省杰出人才创新基金项目(0421001900)和河南省烟草专卖局科技攻关资助项目(HYKJ200202).
关键词 烤烟 打顶 生长素 钾肥 碳氮代谢 flue-gured tobacco topping indole-3-acetic acid potassium fertilizer carbon and nitrogen metabolism.
作者简介 通讯作者E—mail:zcxu@sohu.com,许自成,男,1964年生,博士,教授。主要从事烟草品质生态、烟草营养与烟叶质量评价研究,发表论文100余篇。E—mail:zcxu@sohu.com
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