How do you grow konjac, and how many jin can one mu yield?

Konjac is surely no stranger to everyone; it is a fairly common food in daily life. Konjac has very high edible value and is much loved by people on the market, so now many people want to grow it too. But before planting, what most people care about most is surely its cultivation techniques and the yield per mu!

How to grow konjac

1. Choosing the growing environment: Konjac is fond of warm, humid conditions, likes a moist environment and dislikes a dry one, so it should be grown mainly on land with loose soil, good drainage, deep soil layers, fairly high fertility and good aeration. On this basis, the chosen land must also be thoroughly plowed to a depth of about 40 cm.

2. Sow at the right time: According to experience accumulated over the years, the sowing period is generally late March, and the sowing depth is about 5 cm.

3. Reasonable close planting: There are many varieties of seed corms, and different varieties differ in size. Generally, white konjac seeds should be selected at a weight of 100 to 150 grams, while mottled konjac seeds should be selected at a weight of 200 to 250 grams. When sowing, a few points also need attention. First, when planting, pay attention to mastering the specifications for reasonable close planting. For konjac, the entire area occupied by the above-ground part is more than ten times the flat surface of the underground corm, and the ratio between the upper leaf area and the underground corm determines the planting density. Usually, the better and more fertile the land and the larger the corms kept for seed, the thinner the close planting should be, and vice versa. Second, when planting konjac, seed corms of different sizes can be appropriately interspersed with one another when planted, ensuring that the structure on the land has layers; this can fully raise the land utilization rate and the solar energy utilization rate and helps prevent drought and retain moisture.

How many jin can one mu of konjac yield

1. First-generation konjac seeds are generally about 130-160 per kilogram, the seeding rate per mu is about 100 kg, and calculating at an expansion rate of 20 (generally 20-35), each mu produces 2 tons of second-generation corm seeds, which is about 4000 jin.

2. For second-generation konjac seeds, at 100 grams each and 3000 plants per mu, calculating at an expansion rate of 10 (generally 10-15), each mu produces 3 tons of commercial konjac, which is about 6000 jin.

How to carry out topdressing for konjac

1. The first seedling fertilizer topdressing is when about 80% of the konjac has emerged. Where the base fertilizer is insufficient, apply a heavy seedling fertilizer: per mu, use 20-30 loads of human manure and urine mixed with 40 loads of water and pour it on. Where the base fertilizer is fairly sufficient, per mu use about 5 jin of urea and 5 loads of human manure and urine mixed with water and pour it on.

2. The second topdressing is from the end of June to early July. Mix high-quality farmyard manure such as bedding manure or burnt soil with 6-8 jin of urea and 15-20 jin of potassium sulfate and spread it thinly on the bed surface, combined with shallow earthing up.

3. The third topdressing, for corm expansion, is from late July to early August. Use 20-30 jin of potassium sulfate per mu, apply it in holes and cover with soil, and in August to September spray the leaves 2-3 times with a 0.2% potassium dihydrogen phosphate solution.

Common diseases of konjac and their control methods

1. Soft rot. For planted konjac, cultivation management must be strengthened, with regular deep plowing and land preparation, drainage and ventilation. When selecting seeds, carefully pick out seed corms that are free of rot and wounds, and store and transport them properly. In addition, when planting, note that konjac must not be grown in continuous cropping or intercropped with vegetable crops such as the Solanaceae. Before sowing konjac, it can be soaked in an appropriately proportioned agricultural streptomycin solution, then taken out and dried.

2. Southern blight. For southern blight, field cultivation management needs to be strengthened and standing water drained promptly. When planting, it must not be grown in continuous cropping or intercropping with peanuts, Solanaceae plants or soybeans. At the same time, an appropriately proportioned Bordeaux mixture can be used, during the period from konjac corm replacement to corm swelling, to spray and disinfect the area around where the leaf stalks touch the soil surface.

Konjac cultivation methods are actually not difficult. When planting, the site selection work must be done well, and then planting should be reasonably dense. After planting, field management needs to be strengthened; timely topdressing and disease control are all very important. Only by doing these tasks well can konjac grow better and the yield per mu be higher.