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夏至探秘:解锁花开光照谜————南宁市青秀区凤岭北路中学“二十四节气”生地课堂•夏至实践活动

  • 2026-06-24 02:43:43
夏至探秘:解锁花开光照谜————南宁市青秀区凤岭北路中学“二十四节气”生地课堂•夏至实践活动

夏至探秘:解锁花开光照谜

南宁市青秀区凤岭北路中学

“二十四节气”生地课堂•夏至实践活动

夏至与“夏至”

夏至已至,昼晷已极,宵漏自此长,且看校园数字人“夏至”与大家共话节气。

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在二十四节气中,夏至是白昼最长、阳气最盛的日子,万物至此繁茂至极。今天,就让我们跟随2025级(1)班同学们的脚步,在校园里开启一场关于生命与绽放的科学探秘。

惊鸿一瞥,疑窦初生

三角梅,又名簕杜鹃,为紫茉莉科木质藤本,原产南美。其花小,三朵聚生于色彩艳丽、叶状苞片中,是主要观赏部位。它耐旱易养,花期长,花色丰富。校园里的三角梅,是夏日的精灵。然而,细心的一班同学们发现了一处“谜题”:2号教学楼小广场东侧背光处的三角梅,虽绿叶葳蕤,却不见花影;而小广场西侧沐浴在阳光下的伙伴,则繁花似锦,红紫相映。这鲜明的对比,在同学们心中激起涟漪:是什么,决定了花开的密钥?

AI赋能,模拟预测

带着疑问,同学们通过对实践基地的凤北气象站记录当日实时的气温、光照强度、风速等天气要素以及测光软件分别对2号教学楼小广场东侧背光处的三角梅和小广场西侧的三角梅的一天的光照时常和光照强度进行了为期一周多的数据观察和记录。

经过一段时间,同学们发现2号教学楼小广场东侧背光处的三角梅靠近连廊的三分之一绿叶葳蕤,仍旧不见花影,而靠近小广场的一侧花开得热闹。

接下来同学们启动了AI系统,输入数据后,系统迅速给出了基于植物生理学的“智能预测”:三角梅是典型的短日照、喜光植物,光照是触发其花芽分化的关键环境信号。

系统甚至生成了模拟曲线,清晰展示出在充足光照条件下,植株内促进开花的基因(如FT、COL)和相关激素(如赤霉素、脱落酸)表达量显著上升,最终引导成花。同学们的假设初步成形:光照条件是影响校园三角梅开花差异的主要非生物因素。

抽枝扦插,实证求真

为验证假设并探索更深,同学们通过自己设计的方案,开启“三角梅扦插繁育计划”。扦插是利用植物细胞的全能性。剪取根、茎、叶等营养器官的一部分,在适宜条件下,其分生组织(如形成层、根原基)可被激素(如生长素)激活,进而分化形成愈伤组织,并最终发育出不定根和不定芽,成长为一个独立的植株。

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探究变量设计:他们选取了向阳健壮的枝条作为插穗,系统设置了不同实验组:

非生物因素组:探究基质的影响。分别使用肥沃营养土、贫瘠园土、砂石混合基质进行扦插,并设立水培对照组。

生物因素组:探究插穗自身条件。选用当年生嫩枝与多年生老枝进行对比扦插。

生命拔节,结论绽放

经过数周的精心养护与观察记录,同学们得出了自己的结论:

光照是“花信风”:所有置于阳光充足环境的扦插苗,生长状态和未来开花潜能均显著优于背光处,验证了最初的假设。

基质是“营养基”:肥沃、疏松透气的基质最利于生根与后续生长;砂石基质生根慢;单纯水培虽可生根,但移栽成活率低。

年龄是“活力源”:当年生半木质化枝条作为插穗,生根快、成活率高,是扦插的最佳选择。

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交流生慧,手册成篇

同学们将探究过程、数据图表、养护要点汇编成一本图文并茂的《校园三角梅扦插养护手册》。在班级交流会上,他们分享了从发现问题到收获成果的完整科学探究历程,体会到了实践出真知的乐趣。

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一叶知秋,万物皆理

这次探究并未止步于三角梅。同学们举一反三,认识到扦插繁殖是植物延续生命的智慧:

以根为始:如红薯、大丽花等繁殖。

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以茎为继:如郁金香、仙人掌、绿萝,一段茎节即可孕育新生。

以叶为承:如多肉植物,一片饱满的叶子便能落地生根。

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心植希望,绿满乾坤

从对一株花的疑惑,到亲自动手的验证,再到对生命繁衍规律的领悟,2025级的同学们在这个夏天,不仅将科学的种子埋入泥土,更让探究的精神根植心田。夏至已至,万物并秀,而关于成长与发现的故事,永远在进行。

夏至荷风起

科学探秘时

摄   影:2025级学生

撰   稿:秦秋梅

编   辑:赵苑芸

初审核:岑晓慧

二审核:郭怡君

终审核:张   焰

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  1. CONNECT:[ UseTime:0.000593s ] mysql:host=127.0.0.1;port=3306;dbname=d460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000779s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000299s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000260s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000523s ]
  6. SELECT * FROM `set` [ RunTime:0.000211s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000520s ]
  8. SELECT * FROM `article` WHERE `id` = 528287 LIMIT 1 [ RunTime:0.001841s ]
  9. UPDATE `article` SET `lasttime` = 1782547534 WHERE `id` = 528287 [ RunTime:0.010205s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000260s ]
  11. SELECT * FROM `article` WHERE `id` < 528287 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000529s ]
  12. SELECT * FROM `article` WHERE `id` > 528287 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004588s ]
  13. SELECT * FROM `article` WHERE `id` < 528287 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001698s ]
  14. SELECT * FROM `article` WHERE `id` < 528287 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002816s ]
  15. SELECT * FROM `article` WHERE `id` < 528287 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.024987s ]
0.119938s