论文部分内容阅读
我国在农业生产上施用石灰是很普遍的。石灰究竟有什么作用,如何施用才好,这里谈几个问题。一、施石灰的作用在土壤形成的过程中,由于各地的成土母质、气候和生物等条件的不同,使土壤有碱性(碱土、强石灰性土)、中性土(一般石灰性土)和酸性土之分。土壤之所以有酸性,主要是土壤中存在多量的氢离子的缘故。氢离子越多,酸性越大。酸性大的土壤会产生种种不良的性质。因为一般酸性或强酸性土,含氢、铝和铁离子多,它们把土壤胶体上吸附的、作物需要的养分,如钾、铵、镁、钙等交换出来而随水流走(如右上式)。
It is very common in our country to apply lime in agricultural production. What is the role of lime, how to apply it, here to talk about a few questions. First, the role of lime Shi in the process of soil formation, due to the mother of different soil, climate and biological conditions, so that the soil alkaline (alkaline earth, strong calcareous soil), neutral soil (general calcareous soil ) And acid soil points. The reason why the soil is acidic, mainly due to the presence of large amounts of hydrogen ions in the soil. The more hydrogen ions, the greater the acidity. Sour soil will have a variety of undesirable properties. Because acidic or strongly acidic soils generally contain more hydrogen, aluminum, and iron ions, they exchange nutrients (eg, potassium, ammonium, magnesium, calcium, etc.) .