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包菜在安徽省种植面积较大,全省约有50万亩,在沿江和淮北形成了规模种植,许多地方成为闻名省内外的生产和加工基地,对地方经济的发展起到了很好的促进作用。但偏施氮肥或氮磷肥、不施或少施钾肥的习惯施肥方法降低了包菜的产量和品质,影响了经济效益的提高和农民种植包菜的积极性。因此,推广应用以施用钾肥为中心的包菜平衡施肥技术,对包菜生产和“高产优质高效”农业的发展有积极的促进作用。 1.包菜的需肥特性 有关研究资料表明,每生产1吨鲜包菜,需要吸收4.1～4.8千克纯氮、1.2～1.3千克五氧化二磷、4.9～5.4千克氧化钾,整个生育期纯氮、五氧化二磷和氧化钾的吸收比例为3:1:4,对钾需求量超过氮的需求量,对氮、钾营养有高
Cabbage cultivation in Anhui Province larger area, the province about 500000 acres, along the river and Huaibei scale planting, in many places become well-known production and processing base inside and outside the province, the development of local economy has played a very good promotion effect. However, the partial application of nitrogen fertilizer or nitrogen and phosphorus fertilizer, no or less application of conventional fertilization methods reduce the yield and quality of cabbage, affecting the economic efficiency and enthusiasm of farmers planting cabbage. Therefore, the promotion and application of cabbage balanced fertilization with potash as the center promoted the development of cabbage production and the development of “high yield, high quality and high efficiency” agriculture. 1. Fattening characteristics of cabbage Research data show that for each 1 tonne of cabbage production, need to absorb 4.1 to 4.8 kg of pure nitrogen, 1.2 to 1.3 kg of phosphorus pentoxide, 4.9 to 5.4 kg of potassium, the entire growth of pure Nitrogen, phosphorus pentoxide and potassium oxide absorption ratio of 3: 1: 4, the demand for potassium exceeds the demand for nitrogen, nitrogen and potassium nutrition is high