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果树的枝叶易见,花果更引入注目,根系生长在土壤里,人们了解较少,其实它们和地上部分一样,也有自己依环境而变化的特有形态和活动规律,认识它对发展生产有重要作用。一、根系和树龄果树根系的相对大小,常以根系分布直径与树冠直径之比,即根冠比来表示。一般说根幅大于冠幅,才能保证根系充分吸收土壤内极其微量的无机营养物质和水分。平时我们觉得根系小于树冠,是因为在目前的技术条件下,还不能把根系全部挖出来而产生的一种错误印象。不同龄期的果树,根冠比有很大出入,幼树比盛果期或衰老树大得多。如苹果幼树根冠比
Fruit and tree foliage is easy to see, flowers are more attracted attention, root growth in the soil, people know less, in fact, they and aboveground parts, but also have their own environment-specific changes in the unique patterns and activities of the law, understanding it is important for the development of production effect. First, the root system and age The relative size of the root system of fruit trees, often root distribution diameter and crown diameter ratio, that is, the ratio of root to crown. Generally speaking, the root width is larger than the crown width to ensure that the root system can fully absorb the extremely trace amounts of inorganic nutrients and moisture in the soil. Usually, we think that the root system is smaller than the crown, because under the current technical conditions, we can not dig out all the roots and produce a wrong impression. Fruit trees of different ages, root and crown than a very different, saplings than the Shengguo period or aging tree is much larger. Such as apple young root-crown ratio