How to grow Kaempferia galanga for high yield? Detailed explanation of cultivation techniques
Kaempferia galanga, also known as Sannai and sand ginger. Its underground tubers are used medicinally, with effects such as promoting qi circulation, warming the middle, and relieving pain. Clinically it is mainly used to treat chest and abdominal fullness and distension, cold pain in the abdomen, and similar conditions. It is also used as a spice and seasoning.
Morphological characteristics: It is a perennial herbaceous plant with persistent roots in the ginger family. The tuberous rhizome is solitary or several connected together, pale green or greenish white, aromatic, with thick roots. There is no aboveground stem. Leaves are 2-4, almost sessile, lying flat on the ground, round or broadly ovate, thin in texture, green, sometimes with purple tinting on the leaf margins and tips, hairless or with sparse long soft hairs on the underside, and when dried small red dots can be seen on the upper surface; leaf veins 10-12. The spike inflorescence emerges from the leaf sheath, with 4-12 flowers, aromatic, easily withering; bracts lanceolate, green, the calyx equal in length to the bracts; the corolla tube slender; corolla lobes narrowly lanceolate, white, 1.2-1.5 cm long, the labellum broad and large, about 2.5 cm in diameter, deeply cleft in the middle, the tips of the 2 lobes each slightly concave, white, the throat purplish red, the lateral staminodes petal-like, without filaments, obovate, white, about 1.2 cm long, the top connate with the square corolla tube. Ovary inferior, 3-locular, style slender; fruit a capsule.
1. Growth habits. Kaempferia galanga prefers a warm, humid environment with ample sunlight. It tolerates high temperatures and fears cold. It has no strict requirements for soil, but deep, loose, fertile sandy loam rich in organic matter is best; saline-alkali land, heavy clay, and low-lying land are not suitable for planting.
2. Land preparation and fertilization. Choose a field with high terrain and good drainage, and plow and harrow carefully. While preparing the land, apply sufficient base fertilizer: 5000 kg of farmyard manure, 20 kg of urea, and 50 kg of phosphorus-potassium fertilizer per mu. Make flat beds 60 cm wide and wait for sowing.
3. Sowing: Kaempferia galanga is propagated by underground rhizomes. The sowing period is around Qingming. When sowing, plant the Kaempferia galanga on the prepared bed surface at a row spacing of 15×10 cm. Water to preserve soil moisture and help survival.
4. Field management: After the Kaempferia galanga seedlings emerge uniformly, pay attention to cultivating and weeding. Water frequently in dry weather and drain promptly in rainy weather. Around the Beginning of Autumn, the underground rhizomes enter the rhizome expansion stage, and one topdressing should be applied: apply 10 kg of urea and 10 kg of potassium dihydrogen phosphate per mu.
5. Pest and disease control. The main diseases of Kaempferia galanga are root rot and leaf spot. Integrated control measures can be used: 1. Choose a field with high terrain and good drainage. 2. During land preparation, apply 3 kg of 50% carbendazim powder per mu to disinfect the soil. 3. Before disease onset, use 1:1:120 Bordeaux mixture for control. 4. In the early stage of disease, spray with 500-fold 50% carbendazim solution for control. For the pest scarab beetle, use trichlorfon powder mixed with poison bait to kill it. For underground pests, use phoxim mixed with poison bait to trap and kill them.
6. Harvesting and processing. Kaempferia galanga is harvested after one year of growth, in autumn after the aboveground stems and leaves wither. At harvest, first cut off the aboveground stems and leaves, then dig out the underground tubers, remove all soil, and sun-dry or oven-dry them before they can be sold as medicine. The yield per mu is 250 kg.