高级搜索 标王直达
排名推广
排名推广
发布信息
发布信息
会员中心
会员中心
 
当前位置: 首页 » 技术 » 栽培技术 » 正文

西红柿苗徒长如何促旺转壮?

放大字体  缩小字体 发布日期:2018-06-16  来源:安信种苗官网  作者:青桐  浏览次数:48
核心提示:夏季定植西红柿苗,由于室内温度偏高、昼夜温差小、氮肥施用量偏多、湿度大等原因,导致西红柿苗形成细长、瘦弱徒长苗,栽培时应采取以下措施,促旺转壮。
        夏季定植西红柿苗,由于室内温度偏高、昼夜温差小、氮肥施用量偏多、湿度大等原因,导致西红柿苗形成细长、瘦弱徒长苗,栽培时应采取以下措施,促旺转壮。
番茄8

      1、调节温度

      西红柿苗定植后,缓苗前应做好温室的保温工作,白天温度控制在28℃~30℃(超过30℃时要放风),夜间温度控制在15℃~18℃,以促进缓苗。缓苗后要加强通风,适当降低室内温度,白天控制到22℃~25℃,夜间控制到15℃~16℃,最低10℃~12℃,通过较低的温度适当控苗。

      2、合理控水控肥

      西红柿苗缓苗后到结果前这段时间,做过壮根调土处理后,一般不要再施肥,因为基肥提供的营养基本能够满足西红柿前期生长的需要。在缓苗后至坐果前,千万不要施用氮肥,以防加重徒长。同时要适当减少浇水量和次数。

      3、进行蹲苗处理

      西红柿苗缓苗后到第一花穗坐果期间,要少浇水或不浇水,以促进根系发育,调整营养生长和生殖生长的平衡,利于开花结果。生产上当第一花序果实核桃大,第二花序果实蚕豆大,第三花序刚开花时结束蹲苗。

      4、适当松开吊绳

      为预防西红柿发生倒伏,有必要压蔓后对植株进行吊蔓。需要特别强调的是,一定不要将植株吊得太紧,以免植株的顶端优势得到增强,从而导致植株旺长严重。可以将西红柿的吊绳松开,让植株的茎基部倾斜,也就是让植株跪着长,以此抑制旺长。

      5、适当化学调控

      西红柿苗出现徒长时,不少菜农会选择激素控制旺长,施用化学激素时,一定要控制好药剂浓度,避免控旺过度。尽量不使用矮丰、多效唑等生长抑制剂。以多效唑为例,一旦过量或多次施用,其作用很难消失,导致植株低矮,匍匐生长,果穗密集,但果实体积小,产量大幅度降低。

 
关键词: 西红柿苗
 
[ 技术搜索 ]  [ ]  [ 告诉好友 ]  [ 打印本文 ]  [ 关闭窗口 ]

 

» 点击排行

网站首页 | 帮助中心 | 版权隐私 | 使用协议 | 联系方式 | 关于我们 | 网站地图 | 网站留言 | 广告服务 | 积分换礼 | RSS订阅
 lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll

行业图标
 
友荐云推荐