土壤的生态学意义:土壤是岩石圈表面的疏松表层，是陆生园艺园艺作物生活的基质。它提供了园艺园艺作物生活必需的营养和水分，是生态系统中物质与能量交换的重要场所。由于园艺作物根系与土壤之间具有极大的接触面，在土壤和园艺园艺作物之间进行频繁的物质交换，彼此强烈影响，因而土壤是园艺园艺作物的一个重要生态因子,通过控制土壤因素就可影响园艺园艺作物的生长和产量。土壤及时满足园艺园艺作物对水、肥、气、热要求的能力，称为土壤肥力。肥沃的土壤同时能满足园艺园艺作物对水、肥、气、热的要求，是园艺园艺作物正常生长发育的基础。http://groups.tianya.cn/post-15258-8cd8a4b1b1c6440984d569aa6a4d8e85-1.shtml
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