Department of Plant Nutrition, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia.
Department of Vegetable Crops, Faculty of Agriculture, University of Zagreb, Zagreb, Croatia.
PLoS One. 2019 Sep 6;14(9):e0221767. doi: 10.1371/journal.pone.0221767. eCollection 2019.
In modern agriculture, besides providing high and stable yields, it is imperative to produce products with a high nutritive quality. The goal of this study was to determine the effect of different fertilization regimes on the macro- and micronutrients in beetroot. A 3-year field trial was set up according to a Latin square method with four types of fertilization (unfertilized control, 50 t stable manure ha-1, and 500 and 1,000 kg NPK 5-20-30 ha-1). The mineral content was determined as follows (mg 100 g-1 in fresh weight of beetroot): 14-29 P, 189-354 K, 18-34 Ca, 17-44 Mg, 0.67-1.83 Fe, 0.41-0.65 Mn and 0.28-0.44 Zn. The highest beetroot P content was determined for the treatment with stable manure, especially in a year with dry climatic conditions. The highest beetroot K content was determined for the treatment with 1,000 kg NPK 5-20-30 ha-1, but at the same time for the same treatment, a general decreasing trend of micronutrient content was determined, due to the possible antagonistic effect of added potassium. For better mineral status of beetroot, application of combined mineral and organic fertilizers supplemented with additional foliar application of micronutrients can be suggested.
在现代农业中，除了提供高产和稳定的产量外，生产具有高营养价值的产品也是当务之急。本研究的目的是确定不同施肥制度对甜菜中宏量和微量元素的影响。根据拉丁方方法设置了为期 3 年的田间试验，有 4 种施肥方式（未施肥对照、50 吨稳定厩肥/公顷、500 公斤和 1000 公斤 NPK 5-20-30/公顷）。矿物含量的测定如下（新鲜甜菜 100 克中的毫克数）：14-29 P、189-354 K、18-34 Ca、17-44 Mg、0.67-1.83 Fe、0.41-0.65 Mn 和 0.28-0.44 Zn。稳定厩肥处理的甜菜 P 含量最高，尤其是在气候干燥的年份。1000 公斤 NPK 5-20-30/公顷处理的甜菜 K 含量最高，但同时对于相同的处理，由于添加的钾可能产生拮抗作用，确定了微量元素含量的普遍下降趋势。为了使甜菜具有更好的矿物质状况，可以建议使用矿物和有机肥的组合，并补充叶面喷施微量元素。
