Management techniques of asparagus in summer and autumn

Asparagus is a perennial vegetable, which can be harvested continuously for 10 ~ 15 years after one planting, and enters the normal yield harvest period from the beginning of seedling cultivation to the third year. In the next few years of harvest, the annual output and the quality of asparagus mainly depend on whether the technical measures of field management are scientific and reasonable and the level of management. The growth and harvest of asparagus are different from other vegetables, and the annual harvest period is from April to June, which is determined by the annual growth characteristics of asparagus and the processing time of the processing plant. After the harvest period, the new bamboo shoots developed into aboveground stems and began to grow nutritionally and accumulate nutrients to lay the foundation for next year's yield. In winter, the aboveground plants dried up and the underground roots overwintered in the open field. Therefore, the summer and autumn after the end of bamboo shoot harvest every year is the key period of field management. the main goal of management is to cultivate healthy plants, strengthen water and fertilizer management, control diseases and insect pests, promote photosynthesis and accumulate nutrients. 1. Asparagus is harvested in time during the period of bamboo shoots harvesting. Asparagus is harvested once in the morning and once in the afternoon. Asparagus growing up to the height required by processing will be cut off regardless of thickness. If not cut off, the substandard bamboo shoots will continue to grow and branch, consume a lot of nutrients, and affect the quality and quantity of bamboo shoots in the future. It should be properly watered before the beginning of bamboo shoots harvesting, and topdressing can be properly added according to the growth in the middle stage of bamboo shoots harvest, which can improve the quality of asparagus and prolong the period of bamboo shoot harvesting. two。 The management after bamboo shoot harvesting removes all the young stems from the ground, and the land harvesting white bamboo shoots apply organic fertilizer and phosphate fertilizer in the ditch, and then release ridges to level the ground; those who collect green bamboo shoots should be ditched and fertilized, and the ditches should be 20 cm away from the bamboo shoots ridge. Then water it once. 3. Nutritious students such as  make people seem to pry , make Miao Miao make Yan zuka  look like , rely on  to kill Zizheng, , handsome 4 to sell  Huai Lou? In late August, once in early August. The first time about 20 kg per mu, the second 25 kg ~ 30 kg, mainly nitrogen fertilizer, combined with potash fertilizer, the amount of topdressing can be properly adjusted according to growth and soil fertility. Topdressing method is still ditch fertilization, and timely watering, can not appear the phenomenon of drought. In August, if there are too many stems per plant, the thin and weak stems can be removed, and 8 ~ 10 strong stems can be retained in each plant, which is in a good state of ventilation and light transmission, which is beneficial to the prevention and control of photosynthesis and diseases. 4. Management of overwintering period after the aboveground stem dries up in winter, it can be cleared in time and burned centrally, or it can be crushed to make feed. Generally do not clean up again next spring, otherwise create conditions for diseases and insect pests to survive the winter, which is not conducive to the prevention and control of diseases and insect pests. If it goes on year after year, it will cause outbreaks of diseases and insect pests and cause serious losses. In addition, overwintering water was watered once before the surface was frozen. 5. Although there are many diseases and insect pests to control asparagus diseases and insect pests, they have caused losses in asparagus producing areas in recent years, and the main headaches for producers are stem blight and 14 negative mud insects. Stem blight is the main disease of asparagus, which occurs all over the world. Stem blight mainly occurs in summer and early autumn, which is also the vigorous growth period of asparagus. Fusiform brown spot appeared on the stem of the diseased plant near the ground, and in severe cases, the disease spot could invade the xylem of the stem, and the fir clump leaves at the top of the stem dried up, resulting in plant death. Stem withering and cleaning can be used in prevention and treatment, and plant disease department can be smeared at the first onset, and can be sprayed continuously for 3 times at an interval of 5 days during epidemic. In addition, at the end of bamboo shoot harvesting and overwintering, the root soil was infused with medicine solution of not less than 250 grams per plant. Fourteen-point negative mud worm is the name of general data, but the related research is rarely reported. It is observed that the adults are yellow, with small dots on their backs, hard shells, can fly, and have pseudo-death; after being shaken, the adults on the plant fall to the ground and do not fly, and then climb onto the plant to feed. The damaged parts are asparagus tender tip, bamboo shoot tip scale and twig epidermis. At the beginning, most of them are larvae without hard shell, and no larvae are found, which may be incomplete metamorphosis. Spray medicine early when prevention and cure, and use medicine continuously when epidemic. Because its winter is mostly in the plant hole soil, it can be prevented by filling the root with medicine solution after clearing the land in winter and after bamboo shoots are harvested.