Why does the lotus root grow only leaves but not lotus roots?

Why does the lotus root grow only leaves but not lotus roots? How to fertilize lotus root? Also ask experienced netizens to help introduce that the lotus root does not grow mainly because it does not achieve balanced fertilization, more nitrogen fertilizer and less potash fertilizer. In order to achieve high quality and high yield of lotus root, it is necessary to "reduce nitrogen, control phosphorus and increase potassium". Therefore, the farming network has sorted out the fertilization methods of lotus root, which are listed in detail below for netizens' reference. The demand for fertilizer in the growth period of lotus root: the growth and development of lotus root can be divided into three stages, namely, budding stage, flourishing stage and lotus root stage. The sprouting stage is from the sprouting of the plant to the appearance of the standing leaves. The growth of new roots after the standing leaves of lotus roots mainly depends on the stored nutrients of lotus roots; in the prosperous period of lotus roots, from the standing leaves of plants to the beginning of lotus roots, there is a large demand for nutrients, which is the key period of topdressing fertilizer; from fruiting to harvest, lotus roots and lotus seeds develop synchronously, and nutrient absorption decreases, and most of the nutrients from stems and leaves transfer to lotus roots and lotus seeds. Lotus root fertilization method: first of all, before planting lotus root, turn the base fertilizer into the field, generally apply rotten high-quality farm manure 2000 to 3000 kg, general compound fertilizer 40 to 50 kg. The first topdressing of lotus root is in the standing leaf fertilizer stage, when 3 to 5 standing leaves appear in the field, 25 to 30 kg of nitrogen and phosphorus compound fertilizer is applied per mu, and the second topdressing of lotus root is 30 to 35 kg of nitrogen and potassium compound fertilizer per mu when standing leaves are full. Matters needing attention in the fertilization of lotus root: the lotus root in shallow paddy field can apply compound fertilizer and elemental chemical fertilizer, drainage before fertilization, the effect of shallow water fertilization is the best, and the water layer can be restored two days after fertilization. In deep paddy field, lotus root needs to be mixed with soil to prevent fertilizer from floating. How to plant lotus root variety Daquan lotus root with high yield