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What Types of Fertilizers Are There? A Detailed Guide to Common Fertilizer Classification
These include ammonium phosphate fertilizers, macronutrient water-soluble fertilizers, secondary element fertilizers, biological fertilizers, organic fertilizers, and multi-dimensional field-energy concentrated organic fertilizer. When storing fertilizers, pay attention to: 1. Prevent moisture regain and deterioration. For example, ammonium bicarbonate easily absorbs moisture, causing nitrogen volatilization loss; ammonium nitrate is highly hygroscopic and easily cakes and deliquesces; calcium cyanamide and superphosphate easily cake after absorbing moisture, affecting application effectiveness.
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What are the effects of macronutrient water-soluble fertilizers?
Macronutrient water-soluble fertilizers have the effects of promoting growth and activation, promoting roots and strengthening seedlings, preserving fruit and promoting swelling, detoxifying and preventing senescence, biologically resisting continuous cropping obstacles, and resisting disease while preserving fertilizer. According to the fertilizer requirements and characteristics of different crops, the corresponding fertilizers have different formulas. Those sold on the market include special water-soluble fertilizers for various crops such as vegetables, fruit trees, flowers, grain, cotton, and oil crops.
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Detailed Explanation of Atractylodes macrocephala Cultivation Techniques and Field Management Methods
Atractylodes macrocephala is an important traditional Chinese medicinal material, with functions such as tonifying the spleen and strengthening the stomach, drying dampness and promoting diuresis, stopping sweating and preventing miscarriage. Today I will introduce Atractylodes macrocephala cultivation techniques. 1. Germination promotion and sowing Select new seeds with plump grains and no pests or diseases, soak them in warm water at 30°C for 1 day, then remove them
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Key Technical Points for High-Yield and High-Quality Freshwater Shrimp (Macrobrachium nipponense) Aquaculture
(1) Monoculture of freshwater shrimp in ponds. 1. Pond conditions: area of 5-10 mu, water depth of 0.8-1.5 m, firm and leak-proof pond embankments, slope of 1:(2-3), flat pond bottom slightly inclined toward the drainage outlet, and silt not exceeding 20 cm. 2. Preparation before stocking: ① Chemical pond clearing: 7-10 days before stocking, fill with 20 cm of water, apply 100-125 kg of quicklime per mu after slaking, and splash evenly over the entire pond for clearing and disinfection to remove wild fish and harmful organisms; ② Aquatic plant planting: species include Hydrilla verticillata, Potamogeton maackianus, etc., with the planting area accounting for 30-50% of the pond area, then fill with water and fertilize. 3. Water quality management: ① Use microbial preparations: such as EM bacteria, photosynthetic bacteria, etc. From late August to early November, use biological bacteria once every 15 days depending on the medication situation to improve the pond water environment. ② Microporous aeration: equip one 3 kW microporous aeration pump for every 20 mu, lay main pipes parallel to the two long sides of each pond, and install 6 disc-type microporous pipe discs with a diameter of 1.5 m per mu of pond. Dissolved oxygen should be above 5 mg/L. When dissolved oxygen in the shrimp pond falls below 5 mg/L, turn on the aeration pump. Aeration time is generally from 12:00 to 16:00 in the afternoon and from 24:00 at night to 6:00 the next morning, and should be extended on rainy or muggy days. 4. Feeding management: mainly feed complete compound feed for freshwater shrimp of different specifications at different stages, supplemented with rice bran and other feed in the early stage. Feed twice a day, with 1/3 in the morning and 2/3 in the afternoon. Adhere to the "four observations" (observe the season, observe the weather, observe the water color, observe feeding activity) and the "four fixeds" (fixed time, fixed location, fixed quality, fixed quantity). The daily feeding amount is 3-7% of shrimp body weight, and the specific feeding amount should be consumed within 2-3 hours. The feed coefficient for the whole season is 1.5-1.8. (2) Mixed culture of shrimp and crabs in ponds. There is no limit to the pond area, but generally no more than 50 mu is appropriate, with a water depth of 1.0-1.5 m. Pond clearing, disinfection, and grass planting are carried out according to the operating procedures for river crab culture. Stock 5-8 silver carp and bighead carp per mu, put in 200-250 kg of live snails per mu, and plant aquatic plants mainly including Hydrilla verticillata, Potamogeton maackianus, Elodea nuttallii, etc., with the aquatic plant coverage controlled at about 60%. During the growth period of young shrimp in autumn, apply fertilizer appropriately and feed a small amount of powdered feed. When using insecticides and disinfectants, avoid both the peak molting period of river crabs and the peak molting period of freshwater shrimp.</p>
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Several Principles for Feeding in Macrobrachium nipponense Aquaculture
The freshwater shrimp (Macrobrachium nipponense) has tender flesh, a delicious taste and high nutritional value, and is one of the aquatic products deeply loved by the general public. In recent years its price has remained high, and market demand is strong. In recent years, Lianshui County has vigorously promoted freshwater shrimp farming, and the freshwater shrimp farming area has reached more than 8,000 mu. Scientific feeding is a key link in raising freshwater shrimp well. In the work of bringing fishery science and technology into households, it is often found that some farmers feed at will, causing some unnecessary waste. Based on years of experience and the actual situation of farming, the author has summarized five principles that should be mastered in feeding freshwater shrimp, for the reference of the broad community of farmers.
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Three Key Elements of Scientific Feed Feeding in Macrobrachium nipponense (Freshwater Shrimp) Aquaculture
In the process of Macrobrachium nipponense aquaculture, feed is the input with the largest application amount. Selecting good feed and achieving high utilization rates plays an important role in improving shrimp immunity, preventing shrimp diseases, and optimizing shrimp quality. The following three points should be noted when feeding:
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What are the precautions for freshwater shrimp (Macrobrachium nipponense) farming in spring?
1. Timely split stocking. When the water temperature rises above 20°C, freshwater shrimp begin molting, and at this time the shrimp body is easily bruised and infected. Before stocking, do a good job of drying the pond, and use quicklime, active iodine and other drugs for rapid disinfection; for ponds with moss, green algae, and blue-green algae, spray the entire pond once with copper sulfate.
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Experience Sharing on Rotational Culture of Giant Freshwater Prawn and Mandarin Fish
Macrobrachium rosenbergii is not tolerant of low temperatures. In late autumn and early winter, when the water temperature drops to 15°C, the pond must be drained and the prawns harvested for market in a timely manner. In this way, the Macrobrachium rosenbergii culture pond is actually only utilized for half a year (May to October). Mandarin fish do not completely stop feeding in winter and continue to grow, only with reduced feeding intensity and growth rate.
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How to Raise Giant Freshwater Prawns? A Detailed Guide to Farming Techniques
The giant freshwater prawn, also known as the Malaysian prawn or freshwater long-arm prawn, is a large freshwater shrimp native to Southeast Asia. It has the advantages of fast growth, a wide feeding range, good nutritional content in its flesh, and a short farming cycle. 1. Build the shrimp pond well. The shrimp pond should be built in a place with an adequate water source,
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Giant River Prawn Farming Techniques and Cost Analysis Per Mu
In recent years, the farming industry has been one of the hot topics among people. Many people are no longer satisfied with the life of going out to the cities to work, so they identify their goals and start their own arduous entrepreneurship. Shrimp is one of the most common foods in our lives, and it is loved by many
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