番茄筋腐果发生的原因及防治内容摘要:
2、光照不足,光合作用弱。 浇水过多,气温低,湿度过大,土壤透气性差,影响根系对微量元素吸收,导致番茄植株内碳水化合物不足。 3 防治方法注意换作轮茬。 前茬黄瓜的温室,由于过多施用氮肥,土壤中含氮量较高,应重施有机肥,减少氮肥和含氮量高的无机肥及液体肥,以利于平衡土壤养分,促进番茄对养分的平衡吸收,满足代谢作用的需要。 增施有机肥,尤其是生物有机肥。 通过微生物分解活动可增加棚内二氧化碳含量,并释放出被土壤固定的磷、钾和微量元素,提高番茄光合作用能力。 根据不同季节和番茄需肥特性,采用测土配方施肥,保证各种元素的比例协调,改善土壤状况。 严禁过量施用氮肥,尤其是铵态氮肥。 严禁大水漫灌,提高土壤温度,增加透气性,提高根系对养分和水分吸收能力。 调节好棚内温湿度,及时放风排湿,促进棚内空气流通。 适当稀植,及时进行植株调整(吊蔓、打叶),增加行间透光率,加强行间通风,改善光照条件。 深冬连阴天光照不足时,要适当进行补糖。 同时注意经常喷磷酸二氢钾液,有条件的可进行二氧化碳施肥。 专利查询。番茄筋腐果发生的原因及防治
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