Red lagosol was formerly known as red-brick red soil, which is a type of transition between red and red soils. They are mainly distributed in South China's subtropical regions, ie, most of southern Fujian, southern Guangxi, southern Guangdong, southeastern Fujian, and central and southern Taiwan, roughly between latitudes 22° (23°) and 25° north. Soil moisture meter is an important instrument to determine the moisture in soil.
The characteristics of bio-climate in the red soil region are that the temperature is lower than that in the red-brick area, the annual average temperature is 21-22°C, and the accumulated temperature ≥10°C is between 6500-8000°C. The soil moisture meter measures the annual precipitation between 1200 mm and 2000 mm. The annual rainfall distribution is relatively uniform, and the dry and wet seasons do not change significantly. The primary vegetation is evergreen broad-leaved forest. Apart from the plants in the subtropical regions, there are some tropical plants mixed. Lin also has climbing plants and epiphytes. The red-rich red soil is weaker than the red clay soil, and the silicon-aluminum ratio of the clay is 1.7-2.0. Soil red, common iron-manganese nodules and textured layers. The entire section shows a strong acidic reaction. The content of organic matter and total nitrogen varies greatly depending on the vegetation and cultivation, but it is generally not very high and the phosphorus content is also low. The clay mineral composition belongs to the kaolinite type.
According to the analysis results of the soil moisture measuring instrument, in addition to the subtropical economic forests and fruit trees such as camellia, tea, and citrus, crimson red soil can also be used to grow tropical fruit trees such as papaya, x fruit, pineapple, banana, and peach. , litchi and so on. Kapok can also grow. Yunnan Laihong also planted economical plant lacun and important medicinal materials such as Sanqi. Tropical economic plants such as rubber trees and coffee can only grow on red soils in local sunny winds.
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