土壤由矿物质、有机质、微生物以及水分、空气等组成一个整体,并在自然因素和人为因素作用下不断变化。矿物质是组成土壤最基本的物质,主要成分为磷、钾、钙、镁、铁等元素,除氮外,土壤可提供作物所需的各种元素。盆栽兰花应选用疏松、通气好、富含多种矿物质元素的土壤。平时施用肥料是补充土壤的肥力,使土壤中的各种元素保持平衡。但这只是暂时的。为了满足兰花生长所需的各种养 Soil by the minerals, organic matter, microorganisms and water, air and other components as a whole, and natural and human factors under the constant changes. Minerals constitute the most basic material of the soil, the main components of phosphorus, potassium, calcium, magnesium, iron and other elements, in addition to nitrogen, the soil can provide all the necessary elements of the crop. Potted orchid should be used loose, good ventilation, rich in a variety of mineral elements of the soil. The usual application of fertilizer is to supplement the fertility of the soil and to keep the various elements in the soil in balance. But this is only temporary. In order to meet the various growths orchids required for growth