西红柿表皮长锈裂口是怎么回事

西红柿表皮长锈裂口是怎么回事
2025-03-16 10:03:39
推荐回答(1个)
回答1:

朋友,你好。

番茄裂果分干性开裂和湿性开裂两种。
番茄出现干性开裂的原因:
一是夏季种植密度过低(每平方米少于2株),阳光直射时间长、强度过大,覆盖遮阳网不及时,植株生殖生长过旺或营养供应不足
叶片小,使果皮表面失去弹性,后期出现裂果。
二是冬春季夜间温度低于16℃,次日早晨棚室内温度迅速上升,由于果皮温度上升缓慢,表面发生结露现象,这种
情况经常发生易使番茄果皮变硬、失去弹性,造成裂果。三是营养生长和生殖生长不平衡,营养生长过旺时抑制生殖生长,植株从开花、结果到变色的整个生长过程
会变得缓慢,造成果皮变硬,导致裂果。
湿性开裂一般从果柄处一直裂到果实底部,裂缝宽2~5毫米,果肉会沿裂缝自动流出。这种果实商品性极差,一般作为最差品处理。造成这种湿性开裂的原因,主要是外界天气剧烈变化时没有及时采取措施,棚室内高湿伴随着植株高根压,导致果实内部发生膨胀而开裂。

不同番茄品种对裂果的抗性差异较大,一般果皮薄、果形扁圆、大果型品种易裂果。防止番茄裂果,应尽量选用中蔬6号、毛粉802、红玛瑙140、红杂16等
抗裂品种。栽培时深翻土壤,增施有机肥,增强土壤保水和透水性,促进根系生长,缓冲土壤水分的剧烈变化。此外,应合理灌水,使田间土壤保持湿润,防止土壤
过干或过湿,特别要防止久旱后过湿。

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