Welcome to Guangdong Volkswagen agricultural Polytron Technologies!
Securities Code:833759

Soil auditorium
Location:Home > News > Soil auditorium

Identification and cultivation of soil acidity and alkalinity

Publisher:Time:2015-11-05 18:20:05Views:


1, sensory identification: General acidic soil wet paste rotten, dry to form larger lumps, put bitter taste in the little entrance. In alkaline soil, after the rain, the surface crust, dry loose. The loose soil into the water to stir the muddy, clarify the clarification of the liquid to boil dry, the bottom has a little cream. Of or for red or yellow soil is acid, such as yellow soil, upland soil, red soil land etc.. The general red soil pH value was 4.56.0, soil acidity, pH value is 4.05.5.

2, the indicator plant identification: observation indicate acid loving plant wild plants, usually local long of Castanopsis sclerophylla, beech mast, Rhododendron molle flowers, red bayberry, tea tree, pine, fir, lycopods acid resistant plants, indicating that the soil is acidic; those who long Nandina, cypress, Shi Wei, Selaginella plants, said alkaline soil.
3, depends on the water quality identification: irrigation water soon after infiltration, the water is turbid, and even the emergence of rust membranous substances, indicated that soil strong acidity; watering emerge white foam, foam, alkaline soil. After watering the soil is acidic; after watering the soil compaction, and dry quickly, the soil surface has a layer of powder material is alkaline.
4, to see the stone: in the quartz, sandstone and yellow shale, red shale region of the soil is acidic; in the limestone or calcareous soil area, how much is a little alkaline soil.
Soil acidity is too large, per acre applied in 20 to 25 kg of lime, and enough farm fertilizer, avoid by all means is only lime no farmyard manure application, so the soil but will become yellow to become thin. Can also be applied to plant ash 40 to 50 kg, and soil acidity, better regulation of soil water and fertilizer conditions. As for alkaline soil, usually 30 to 40 kilograms per mu of gypsum as basic fertilizer improved. Alkaline too high, can be added a small amount of aluminum sulfate, ferrous sulfate, sulfur powder, humic acid fertilizer, etc.. Often pour some ferrous sulfate or aluminum sulfate dilute water, can increase the soil acidity. Humic acid fertilizer can adjust the pH of the soil because it contains more humic acid. Above method to apply sulfur powder, slow effect, but the most lasting effect; application of aluminum sulfate of needing to add fertilizer; application of ferrous sulfate (alum fertilizer) quick, but time is not long, often employ.


4008807696
0769-88431833