石灰 石灰是含钙的化合物,钙是作物必需的营养元素。把石灰作为肥料来施用,主要目的是用它来中和土壤酸性,改良酸性土壤,同时还能提高土壤温度。酸性土壤施用石灰,土壤理化性状得到改善,为有益微生物创造良好的活动环境,所以有较明显的增产作用。 石灰肥料主要有石灰石、生石灰、熟石灰。旱田一般用它作底肥,水田作基肥、追肥均可,每亩施用量百斤左右。 Lime lime is a calcium-containing compound, and calcium is an essential nutrient for crops. The main purpose of applying lime as a fertilizer is to use it to neutralize soil acidity, improve acid soils, and at the same time increase soil temperature. Acid soil lime, soil physical and chemical properties have been improved for the beneficial microorganisms to create a good environment for the activity, so there is a more obvious yield. Limestone is mainly limestone, quicklime, slaked lime. Dry fields generally use it as a base fertilizer, paddy field for basal fertilizer, top dressing can be applied per acre around pounds.