论文部分内容阅读
柑桔是深根性多年生果树,其根系有深、广、密的特点。要求土壤深厚、熟化、肥沃,才能满足柑桔对水、肥、气、热的需求。但是,据调查,我县有近二万亩柑桔树都是栽植在丘陵坡地上,土壤母质风化度浅,基岩出露高,表土深只有1尺左右,下层是未风化的基岩(砂岩或泥页岩—硬石谷子),阻碍了柑桔植株根系向纵深发展,这是导致柑桔低产的主要原因。而另一些沟、谷地的柑桔园,土壤母质虽然风化深、泥土层厚,但下层土
Citrus is a deep-rooted perennial fruit tree with deep, wide and dense roots. Requires the soil is deep, mature, fertile, in order to meet the citrus water, fertilizer, gas and heat needs. However, according to the survey, nearly 20,000 mu of citrus trees in our county are planted on hillside slopes. The parent material of the soil is weathered shallowly, the basement rock is exposed high, the surface soil is only about 1 foot deep, and the lower layer is unweathered bedrock (sandstone Or shale - hard stone millet), hinder the root system of citrus plants to develop in depth, which is the main reason leading to low yield of citrus. Other ditches, citrus groves in the valley, although the soil parent material is weathered deep and the soil layer thick, but the lower soil