Planting techniques of Amorphophallus bulbifera in Yunnan

1. Selection method of Amorphophallus bulbifera planting plot. The plot where Amorphophallus bulbifera is planted requires humus sandy loam with high and dry terrain (no waterlogging), deep soil fertility and good fertilizer and water conditions. It is forbidden to choose planting plots in low-lying depressions with poor drainage and easy water accumulation or flat dams with difficult drainage. Then, the planting plots were deeply ploughed, and according to different plots, the plots were arranged into high compartments with a width of1~1.5m. The width of the working lane between cars is 30~40㎝. Then increase or decrease the farm organic fertilizer according to the fertility status, spread it on the high compartment, and mix the soil lightly to make the rich soil fully and evenly mixed before sowing.

2. Intercropping with tall crops or intercropping under sloping fields with high forest coverage are the two best intercropping modes for high and stable yield of Amorphophallus bulbifera. Although Amorphophallus bulbifera likes temperature, it avoids direct sunlight and is afraid of strong light. Too strong solar radiation will make Amorphophallus bulbifera grow poorly and prone to "sunburn". Therefore, it is a very good choice to interplant with tall crops such as corn or to interplant Amorphophallus bulbifera under the forest. The purpose is to make rational use of resource space and have synergistic effect on interplanting crops. Secondly, interplanting Amorphophallus bulbifera can also save shading materials, improve labor efficiency and reduce the planting cost of Amorphophallus bulbifera.

3. Strengthening the control of soft rot and root rot of Amorphophallus bulbifera is the fundamental guarantee to improve the quality and high yield of Amorphophallus bulbifera. Like other white Amorphophallus konjac and Qingjiang Amorphophallus konjac, Amorphophallus bulbifera is also prone to konjac soft rot and root rot. Therefore, manual labor should be reduced as much as possible in the field to avoid artificial mechanical damage to konjac plants, so as to facilitate the infection of pathogenic bacteria and cause soft rot and root rot of konjac. Secondly, in the early stage of the soft rot of Amorphophallus bulbifera, root irrigation (preferably copper preparation) or foliar spraying should be adopted in time to inhibit the development of the disease.

4. Yield effect of Amorphophallus bulbifera planting: According to the demonstration results of field comparative test, the maximum unit weight of underground tuber of Amorphophallus bulbifera is about 9 kg, with an average of about 3.5 kg, and the yield per mu can reach 3,000 kg ~ 7,500 kg, with an output value of nearly 20,000 yuan per mu.