Please describe the peat, vermiculite, perlite, bark, sand characteristics and application in the garden?
Median Peat: a transitional type between the two categories. The soil bulk density as small as 0.2 ~ 0.3 g / cm 3, porosity up to 77 ~ 84%, the nitrogen content was very rich (1.5 ~ 2.5%), but the available nitrogen, phosphorus and potassium are low, a strong adsorption capacity of water and ammonia, is a good material for fertilizer and preparation of washer, culture soil and is the ideal material for nutritional bowl. For potting medium, 100% peat can be used, but usually only 25 to 75% by volume.
Peat, peat and peat. It is the ancient marshy plants are buried in the ground, in the flooding and lack of air conditions, decomposition of organic matter is not completely special. The peat in Northeast China is high and cold area. The content of nitrogen and ash in peat is low, slightly acidic or strong acidity, pH value is 5.0---5.9, EC value is less than 1, and water holding capacity is high.
Generally 52% (V), good ventilation, ventilation gap between 27---29%. According to the characteristics of peat forming conditions, plant community and physicochemical properties, and can be divided into the following three types: low Peat: distributed in the low-lying water, seasonal or perennial water, water for high groundwater containing minerals. Chiefly growing plants requiring more mineral nutrients such as Phragmites (Carex) and Phragmites australis. General decomposition degree is high, low acidity, acidic reaction, ash elements and nitrogen content, water holding capacity is small, you can use a little dry, mostly for the peat in china. High Peat: distributed in the alpine region, mainly by water containing mineral nutrients less water supply, the growth of a plant on the low nutrient conditions, such as Eriophorum (Eriophorum) and fresh water species (FOntinalis). The peat decomposition degree, nitrogen and ash elements containing low, high acidity, acidic or strong acid, plus 4 to 7 kilograms per cubic meter volume of broken dolomite can adjust PH to the growing range of flowers need, the peat has a high cation exchange capacity and water holding capacity, does not need to be crushed can provide well ventilated, most of Europe and Canada is the peat.
