How to fertilize asparagus in scorching summer
1. Fertilization at the seedling stage
(1) Modulation of seedling cultivation soil in the seedbed. Cultivation soil is the basis for cultivating strong seedlings of asparagus, and the cultivation soil must be rich in nutrients and good physical and chemical conditions. Compatible cultivation soil can be fertile loam, decomposed manure, livestock and poultry manure, large manure, plant ash, etc. The ratio is: 6 parts of sieved loam, 4 parts of decomposed cow and horse manure, and circle manure. After mixing, mix 15-20 kg of dry or dry chicken manure per cubic meter, and 0.5-1 kg of superphosphate. , 5-10 kilograms of plant ash or 1-1.5 kilograms of three compound fertilizers. After mixing well, fill it into the yang border or arched border, the thickness is 14 cm.
(2) The preparation of nutrient soil for nutrient pot seedlings: generally 5 parts of clean garden soil, 2-3 parts of decomposed manure manure, 1 part of river mud, 1 part of plant ash, 2%-3% of superphosphate, and mix well. Add water and mix to the point that it "forms into a dough in your hands and disperses on the ground".
2. Fertilization in the juvenile period
(1) Fertilization before planting. Asparagus likes a loose and fertile soil environment. Before planting, the soil must be deep plowed. Before plowing, apply 2,000-3000 kg of organic fertilizer per 666.7 square meters. After plowing, rake and level it. In a planting ditch of 40 cm in depth and width, 3,000-4,000 kg of decomposed organic fertilizer, 40 kg of nitrogen, phosphorus, and ternary compound fertilizer (or 25 kg of ammonium bicarbonate, 50 kg of superphosphate, and chlorine 15 kg of potassium), 25-50 kg of decomposed cake fertilizer.
(2) Fertilization after planting. After 1 month of planting, the young plants have slowly survived seedlings and gave birth to new branches. To promote their growth and development, they must be given sufficient water and nutrients. At this time, quick-acting chemical fertilizers can be applied, 8-10 kilograms or three yuan per 667 square meters of urea. Compound fertilizer 10-20 kg. Before the plant enters the autumn hair, ditch and topdress the animal manure or other organic fertilizer 3000-4000 kg, phosphorus and potassium fertilizer 10 kg each to promote autumn hair, expand the assimilation area of ​​the plant, and accumulate more assimilation, for the next year A good harvest lays the foundation.
3. Fertilization in adulthood
Fertilization of adult asparagus can be divided into 3-4 times a year. Before harvesting in spring, plowing the land and raising ridges can be combined, and 20 kilograms of compound fertilizer and urea are applied for every 667 square meters of ditching between rows. 1000-1500 kg of decomposed and finely pounded organic fertilizer can also be applied. After cessation of harvesting, the stored roots consume a lot of nutrients and form upper stems and leaves. Therefore, about one month after cessation of harvesting, it is the period of the most fertilizer demand in a year, accounting for 70% of the annual fertilization. In this period, 3000-4000 kg of organic fertilizer is applied per 667 square meters, and 20-30 kg of compound fertilizer and urea are mixed in. The quantity of organic fertilizer is small or the quality is not good. 50-100 kg of cake fertilizer can be mixed in between the rows. Ditch into, and then spread soil to bury fertilizer. After the asparagus seedlings are fully watered, water once to promote the absorption of fertilizer by the asparagus. After more than one month of growth, there will be a peak of stem-drawing around the beginning of autumn, and then it will enter a vigorous period of autumn. In order to ensure the normal growth of the autumn hair period and promote the production of plants and the accumulation of more photosynthetic products, 1000-2000 kg of organic fertilizer and 20 kg of compound fertilizer can be applied in the ditch between the rows before and after the beginning of autumn. If the amount of organic fertilizers is insufficient, the amount of chemical fertilizers can be increased appropriately, but nitrogen, phosphorus, and potassium must be used in combination, and it must not be only nitrogen fertilizer without phosphorus and potassium, or too much nitrogen fertilizer. At the end of autumn and early winter, 1000-2000 kg of organic fertilizer and 15-20 kg of compound fertilizer should be applied per 667 square meters after the asparagus stops growing, so that the asparagus can survive the winter safely and promote the early growth of the following year. The ditching and top dressing should not be too close to the asparagus nor too far away. Generally, it can be 20-40 cm away from the bamboo shoots, so as not to damage the roots. During the harvest period, topdressing a small amount of chemical fertilizer in stages has the best effect on increasing the amount of bamboo shoots picked, especially 10-15 days before the stop of harvesting, 10-15 kg of compound fertilizer and urea for every 667 square meters. , Can be absorbed by asparagus immediately after stopping harvesting. Asparagus fertilization, people everywhere have also explored some successful experiences.
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I. Introduction
Cationic fixing agent is polyelectrolyte, consists of a series of organic synthesis with low molecular weight and strong cationic, which is generally 100% cationic. Product character is aqueous solution.
II. Performance Indicators:
1. Appearance: colorless to pale yellow viscous liquid
2. Solid content: ≥ 50%
3. PH: 2 ~ 6
4. Viscosity: 50 ~ 200 mpa.s
III. Application Field
Used in paper pulp as a cationic fixing agent. Usually the slurry contains colloidal particles consisted of fiber materials, additives and water, which are with anionic charge and interfere the papermaking process, so it is also known as anionic trash; the interference is mainly in the following aspects:
1. Influence wet chemical additives` normal function, especially for cationic retention and drainage aids, sizing agent; or cause to increase the amount of wet chemical additives;
2. Deposits in the paper machine system; interfere the efficient papermaking process.
3. COD discharge of sewage systems, increasing the load on the sewage treatment plant. Recommended for use in mechanical pulp, chemi-mechanical pulp, and secondary fiber pulp slurry and coating waste stuff. Anionic trash neutralized by fixing agent can be bonded to the fibers so as to be taken away by paper sheets.
IV. Methods of Application
Adding methods: excellent water-solubility; can spread out in water instantly. Dosing pump is generally used to drive it into a static mixer or a mixing pump , mixed with water, diluted to about 0.2% of the dissolved solution, and then into the slurry system.
Adding point: the general adding point is in the front of flow system, that is, before the machine chest or fan pump; or add in the pulp plant. Which is taken into consideration for the reaction time of the cationic fixing agent polymer molecules and garbage, also need to time and space for other wet end additives. According to the slurry source, sometimes you need to select two or more points to add. When the slurry contains a source of coated broke, generally requires additional anionic trash fixative in the transport of the paper sheet.
Adding dosage: anionic trash content in the slurry is usually gauged by the cationic charge contents measured by PCD (particle charge analyzer) in the slurry. The measure will directly show the dosage tips, but the real dosage depends on the practical application. For general slurry, the recommend amount is in the range of 0.3kg ~1.8kg/t dry pulp.
V. Safe Operation
1. Cationic fixing agent is a water-soluble polymer, dissolved in water in a highly slippery state and avoid to spill on the floor. If spill, shall timely absorb with sand, sawdust.
2. Wear gloves, wear overalls to operate.
VI. Storage
The product should be kept sealed, stored in cool, dry, ventilated places, and appropriate temperature should be 10-30 ℃.
VII. Package
200 kg plastic drums or 1000 kg PE IBC drum.
Fixing Agent,Fixer,Anionic Trash Catcher,Charge Neutralizer
Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com