High yield technology of asparagus

Asparagus seeds form bulb disks within two or three years after sowing. In spring, many tender stems are extracted from the upper part of the bulb disk, which is usually eaten asparagus. Its life span is long, generally up to 14-18 years. After sowing and planting, it can be harvested in the second year. The first generation of excellent asparagus can harvest 150 kg-200 kg / mu of fresh green asparagus in the second year. The yield of fresh bamboo shoots in the third and fourth years can reach 600kg-1000 kg / mu. Asparagus is suitable for crops cultivated in temperate climates with cool winters and warm summers. In order to meet the dual requirements of air permeability and water conservation, it is most ideal to cultivate asparagus in rotten loam or sandy loam. Asparagus is sensitive to soil acidity and alkalinity, and the most suitable pH value (pH) of soil is 5.8-6.7. During dormancy, its underground part can tolerate a low temperature of-38 degrees Celsius, so its roots can survive the winter safely in the case of 1.5 meters of permafrost. The most suitable temperature for asparagus seed germination is 25 degrees Celsius-30 degrees Celsius. Most of the tender stems harvested in this temperature change have compact scales, good shape and best quality. Asparagus underground fleshy root can store more water, which can be adjusted by itself according to the amount of water in the soil. Asparagus metamorphosis needle-like stem is like needles, evaporation is greatly reduced, so asparagus is more drought-tolerant. However, timely watering is a necessary condition for high yield of asparagus. Asparagus is a kind of light-loving crop, which requires sufficient sunlight in the planting land, so asparagus can only grow vigorously in the open land without shade.