天气预报 > 其他 > 秋叶为什么会落下
秋叶为什么会落下
更新时间: 2020-10-14 00:00:00  

1、气温下降,雨水减少,光合时间缩短,叶柄基部形成脆弱的薄壁细胞,这些细胞容易分离,进而导致叶片衰落;

2、叶片经过一定时期的生理活动后,细胞内大量的代谢产物会引起生理功能衰退而死亡;

3、叶片中的水分蒸发很快,但树根吸收水分的能力已大大下降,水分、养料供应不足,叶绿素被破坏,叶黄素等开始活跃。

关键词: 秋叶 为什么

秋叶为什么会落下相关经验

天气预报

最新推荐

页面:/news/view-1844858/ | 耗时:0.4986 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=1844858 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1844858 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1844858 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(411442,706184,1064573,244612,1084865,128754,571452,191928,1118108,419196,314866,1124316,541295,1132917,132241,1066158,1597773,1106150,1125347,251279,1078437,115729,1086420,375842,183575,308715,2015539,245781,1078811,1464414) ORDER BY field (ArticleID,411442,706184,1064573,244612,1084865,128754,571452,191928,1118108,419196,314866,1124316,541295,1132917,132241,1066158,1597773,1106150,1125347,251279,1078437,115729,1086420,375842,183575,308715,2015539,245781,1078811,1464414)