1、Experiment investigation on konjac fertilizer ratio in the

To screen out the optimal ratio of konjac production and fertilization amount, a design experiment with 3 factors, 4 levels and 14 treatments (“3414”) was used to determine the yield of konjac under each treatment with blank (N 0 P 0 K 0) as the control，and the relationship between the yield of konjac under different treatments ...

2、Response and mechanisms of Amorphophallus konjac agronomic traits and

The artificial cultivation of A. konjac in China began in the 1980s, and its artificial domestication time was short. Large-scale diseases, including soft rot, southern blight, stem rot, and blight, can easily occur during planting.

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the development of konjac deep processing technology, the development and research of konjac food and the special application value of konjac glucomannan in medicine and chemical industry,

4、魔芋栽培技术（Konjak cultivation techniques）.doc

Fertilizer: fertilizer per hectare for fertilizer (manure, compost and manure) more than 15 tons of compound fertilizer of 150 ~ 200kg, 150 ~ 200kg of calcium magnesium phosphate as fertilizer; Potassium chloride 150 ~ 200kg, mature, human and livestock manure, urine 750 load.

Effects of Nitrogen, Phosphate and Potassium Fertilizers on

[Conclusion] The applica-tion amount of nitrogen fertilizer should be control ed reasonably in the planting of konjac, but the application amount of phosphate and potassium fertilizer could be in-creased to some extent, reducing the occurrence of soft rot of konjac.[目的]研究氮、磷、钾肥不同施用量对魔芋软腐病发生的影响。

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The proportion of base fertilizer should account for 70-80% of the total fertilizer, and more than 80% of base fertilizer should be used in special areas, mainly slow-release fertilizer.

Advances on Cultivation Modes of Amorphophallus konjac in China

The research progress in recent years on cultivation modes of konjac in China such as yard cultivation, monoculture, intercropping cultivation in field with other crops, understory cultivation, rotation cultivation and protected cultivation were reviewed, and the advantages and disadvantages of the above cultivation modes were analyzed.

Konjac cultivation technology

4. Proper and close planting: There are many species of pods, and the sizes of different pods are also different. In general, white konjac seeds need to have a weight of 100 to 150 grams. The color of konjac seeds needs to be 200 to 250 grams.

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It needs the most potash fertilizer, followed by nitrogen fertilizer, followed by phosphate fertilizer and trace elements such as calcium, zinc, magnesium, manganese and so on.

Special fertilizer for konjac

A special fertilizer, konjac technology, applied in the field of special fertilizer for konjac planting, can solve the problem of the law of konjac fertilizer demand, the amount of fertilizer required, the composition of fertilizer required and its proportion.

Konjac, a perennial herbaceous plant belonging to the genus Amorphophallus (family Araceae), originates from South America and is also cultivated in southern China. Renowned as a "natural health food" due to its rich nutritional value, low calorie, and high fiber content, konjac's yield and quality heavily depend on the rational application of phosphate fertilizers. Below is a detailed guide on konjac cultivation techniques and phosphate fertilizer management.

I. Konjac Planting Techniques

1. Selecting Superior Varieties Choose konjac varieties adapted to local climates, such as white konjac (A. albus) or yellow-skinned konjac (A. rivieri). These varieties offer higher yields and stronger disease resistance.

2. Field Preparation Opt for well-drained land, deeply plow the soil, remove weeds and stones, and ensure loose, fertile soil.

3. Seeding and Nursery Soak konjac seeds in warm water until they swell, then plant. Avoid overly dense planting to prevent growth inhibition.

4. Field Management Maintain soil moisture by irrigating timely. Apply fertilizers, weed, and control pests/diseases according to konjac’s growth stages.

5. Harvesting and Processing Harvest when plants reach sufficient height. Cleanse, sun-dry, or dry the konjac to produce edible or medicinal products.

II. Phosphate Fertilizer Proportions

1. Types of Phosphate Fertilizers Common phosphate fertilizers include calcium phosphate, ammonium phosphate, and potassium dihydrogen phosphate (KH₂PO₄). Among them, KH₂PO₄ is a high-efficiency compound fertilizer containing phosphorus and potassium, which promotes growth and fruit formation.

2. Application Rates Based on soil tests and konjac’s nutritional needs, apply phosphate fertilizers judiciously. A typical recommendation is 10–20 kg of KH₂PO₄ per mu (approx. 667 m²). Adjust dosages contextually.

3. Application Methods

   • Early Stages (Seedling & Early Flowering): Apply via furrows or holes, spreading fertilizer evenly over soil.
   • Late Stages (Full Bloom & Tuber Formation): Use foliar spraying to directly apply phosphorus to leaves.

4. Combining with Organic Fertilizers Pair phosphate fertilizers with organic inputs (e.g., farm manure, animal compost) to enhance nutrient balance. This improves phosphate utilization, boosting growth and yield.

III. Key Considerations

1. Avoid Overapplication Excessive phosphate can lead to soil salinization, structural degradation, and acidification. Control dosages strictly.

2. Balanced Fertilization Combine phosphate with nitrogen, potassium, and other nutrients to ensure comprehensive nourishment for optimal growth.

Rational phosphate management is critical to enhancing konjac yield and quality. By mastering cultivation techniques and optimizing fertilizer ratios, farmers can significantly improve productivity. Careful attention to avoid overapplication and balanced nutrient integration ensures healthy konjac growth.