Alfalfa plays an important role in agriculture, soil improvement, environmental protection, food processing, etc., benefiting human and animal life and the environment. it has a variety of uses, including feed, feed additive, silage. soil Improvement: Its root system improves soil structure, fertility and organic matter content. green manure: absorbs carbon dioxide, releases oxygen, fixes nitrogen, and fertilizes the soil. protective grassland: strong adaptability, drought and cold resistance, can be used for land improvement, soil erosion control, ecological protection, etc.
The main source of nutrition for alfalfa is elements in the soil. Here are some common nutrients and symptoms of alfalfa:
Nitrogen (N): Alfalfa has a high demand for nitrogen. If there is a lack of nitrogen, the leaves will turn yellow, and the plant will grow slowly.
Phosphorus (P): Alfalfa also has a relatively high demand for phosphorus. Plants lacking phosphorus may grow poorly, and the leaves will become dark green or purple.
Potassium (K): Alfalfa requires adequate potassium for plant growth and flowering. Potassium deficiency can cause yellowing of leaf edges.
Magnesium (Mg): Magnesium deficiency can cause yellowing of the leaves and purple spots in the interleaf spaces.
Iron (Fe): A lack of iron can cause the leaves to turn yellow and the veins to appear green.
Zinc (Zn): Zinc deficiency can cause yellow spots on alfalfa leaves. According to the specific symptoms during the growth of alfalfa, different nutritional elements can be supplemented in a targeted manner.
The missing nutrients can be replenished by applying organic or chemical fertilizers. It is best to conduct a soil test before fertilization to understand the content of various elements in the soil to determine the type and amount of nutrients that need to be supplemented.
The nitrogen fixed by Rhizobium meliloti and the nitrogen released by the decomposition of soil organic matter can meet the nutritional requirements of alfalfa. In good alfalfa fields, nitrogen fertilization does not increase yield and quality and may decrease them. However, in special cases, such as poor and unimproved soil, 2-4kg of nitrogen fertilizer can be applied in an emergency to increase production.
Post time: Aug-21-2023
