硅是植物的营养元素之一。硅肥是近代发展起来的新型肥料,熔渣硅肥是一种含硅酸钙为主的矿物肥料。熔渣硅肥中除含硅外,还含有钙和镁,故亦称硅钙肥或硅钙镁肥。20世纪50年代,日本首先把硅肥应用在水稻上,80年代,日本又将硅肥应用到小麦、大豆、蔬菜及花卉等作物上,兴起了硅肥研究的热潮。近十几年来,山东省日光温室(冬暖大棚)蔬菜生产发展很快,至2001年全省日光温室面积达20×10~4 hm~2。针对目前保护地蔬菜氮、磷、钾过量施用,造成某些中微量元素缺乏,探讨硅肥在棚室蔬菜中的应用,显得尤为重要。一、试验概况我们于2000年5月至2001年7月在山东寿光、青州、临淄三市区硅肥经销点控制区内的日光温室中进行了硅肥肥效及用量试验。供试硅肥由山东全都有 Silicon is one of the plant’s nutrients. Silicon fertilizer is a new type of fertilizer developed in modern times. Slag silicon fertilizer is a kind of mineral fertilizer mainly containing calcium silicate. Slag silicon fertilizer in addition to silicon, but also contains calcium and magnesium, it is also known as calcium silicate fertilizer or calcium-magnesium fertilizer. In the 1950s, Japan first applied silicon fertilizer to rice. In the 1980s, Japan applied silicon fertilizer to crops such as wheat, soybeans, vegetables and flowers, raising the fever of silicon fertilizer research. In the past ten years, the vegetable production in solar greenhouse (winter warm greenhouse) of Shandong Province has been developing rapidly. By 2001, the area of ​​solar greenhouse in the province reached 20 × 10 ~ 4 hm ~ 2. In view of the current application of nitrogen, phosphorus and potassium in vegetables in the over-applied, resulting in the lack of some trace elements, to explore the application of silicon in greenhouse vegetables, it is particularly important. First, the test profile We in May 2000 to July 2001 in Shandong Shouguang, Qingzhou, Linzi three Silicone fertilizer distribution area within the control of the city’s solar greenhouse fertilizer efficiency and dosage tests. Fertilizer test for all from Shandong