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引起盆栽花卉生理性黄叶的原因较多,不同的黄叶要采取不同的治疗方法才能取得良好的效果。据我们近几年的观察试验,现把盆花几种主要的生理性黄叶及治疗方法作一总结。1.湿度失调黄叶。花卉要想枝繁叶茂、花色艳丽,是离不开浇水的。但因各种花卉习性不同,有些较耐干,有些不耐干,故浇水应根据花卉的品种、季节、气温和空气湿度来定。湿度失调造成叶片发黄的原因有“水黄”和“旱黄”两种。水黄的症状是,花卉顶部的嫩叶淡黄或萎缩,老叶逐渐发黄脱落。主要是盆土浇水过多造成积水,使根部缺氧,有利于厌气性微生物活动,分泌亚硫酸等物质毒害根系,部分须根腐烂,失去了吸收水分和养分的功能。治疗方法:一是疏松盆土使之通气;二是
Physiological causes of potted yellow leaves of flowers for many reasons, different yellow leaves to take a different treatment in order to achieve good results. According to our observation and test in recent years, we now summarize several major physiological yellow leaves and their treatments. 1. Humidity disorders yellow leaves. Flowers want to flourish, bright colors, is inseparable from the water. However, due to a variety of different habits of flowers, some more resistant to dry, some impatience dry, it should be based on the flowers of flowers, season, temperature and air humidity to be set. The reasons for the yellowing of leaves caused by the imbalance of humidity are “water yellow” and “dry yellow” two kinds. The symptom of water yellow is that the young leaves on the top of flowers are yellowish or atrophied, and the old leaves gradually turn yellow and fall off. Water is mainly caused by too much potted soil water, so that the root hypoxia, is conducive to anaerobic microbial activity, secretion of sulfur and other substances poisoning the root system, part of the fibrous roots decay, lost the function of absorbing water and nutrients. Treatment methods: First, loose basin so that ventilation; two is