Isatis indigotica cultivation technology and harvesting processing
Isatis indigotica is a cruciferous plant that uses roots and leaves as medicine to clear heat and detoxify, cool blood, and eliminate spots. Adaptability is strong, the natural environment and soil requirements are not strict, drought resistance, cold resistance, avoiding standing water. Can be cultivated in North and South China. The temperature is suitable in spring and autumn, the leaves grow and grow large, the soil is loose and fertile and moist, and the sandy loam is low. Mainly produced in Anguo City, Hebei, Nantong City, Jiangsu.
Breed with seeds. 10 月下旬刨收板蓝根时，选择无病虫、主根粗大健壮又不分根的根条，按行株距 50 厘米× 25 厘米移栽到肥沃的留种田地，栽后及时浇水，加强管理，第二年 5 ～ 6 月间种子顺序成熟后，采收、晒干、脱粒，存放通风干燥处备用。 Retention and seed collection: Banlan harvests roots but does not produce seeds. When it is harvested in late October , it chooses roots that are disease- free and have a large, robust root that is strong and does not divide roots. After the planting, the seedlings should be harvested, dried, threshed, and stored in a ventilated and dry place for future use. After harvesting the seeds of the board, such as the root is lignified, can not be used for medicinal purposes.
4 月上旬，夏播在 5 月下旬。 Sowing: Spring sowing and summer sowing are basically the same. Spring sowing is in early April and summer sowing is in late May. 25 厘米行距划出 2 ～ 3 厘米左右的浅沟，将种子均匀撒入沟内，覆土 2 ～ 3 厘米，稍加镇压，每 666.7 米 2 播种量 3-4 千克。 First draw a shallow ditch of about 2 to 3 cm on the ridge surface with a row spacing of 25 cm . Spread the seeds evenly into the ditch. Cover the soil with 2 to 3 cm. Slightly suppress the seeding amount to 3-4 kg per 666.7 m2 . 7 — 10 厘米时， When the seedling height is 7-10 cm, 5 ～ 7 厘米定苗，同时兼行除草、松土。 To make time for seedlings, finally set seedlings at a distance of 5 to 7 cm, while weeding and loosening the soil. 5 月下旬至 6 月上旬每 666.7 米 2 追施硫酸铵 7.5 千克，过磷酸钙 7.5 — 15 千克，混合磷酸钙 7.5 ～ 15 千克，混合撒入行间，有条件的地方每 666.7 米 2 也可以追施饼肥 40 ～ 50 千克，南方各地多追施人粪尿 400 ～ 450 千克，凡生长良好的在 6 月下旬和 8 月中下旬能采收两次叶片，采叶后随时追肥浇水，以促使叶片生长。 According to the growth of the seedlings after the seedlings are set, appropriate fertilization and irrigation are applied. Generally, from late May to early June , 7.5 kg of ammonium sulfate , 7.5 to 15 kg of superphosphate , and 7.5 to 15 kg of calcium phosphate are mixed. During entry, 40 to 50 kilograms of cake fertilizer can be applied per 666.7 m 2 of places where conditions permit, and 400 to 450 kilograms of manure and urine can be applied to other places in the south . Those who grow well can be harvested in late June and mid to late August. Twice the leaves, topdressing and watering at any time after picking the leaves to promote leaf growth.
Harvesting and processing
6 月下旬苗高 15 ～ 20 厘米时可收割一次叶子，割时由茎基部留茬 2 ～ 3 厘米，待叶子重新生长时 (8 月 ) ，可再割一次，在长江沿岸每年能割 3 次叶子，收割后晒干为药用大青叶，小量栽种时可采用周围老叶，留中央新叶继续生长， 10 月地上部枯萎，刨收根部，先在畦旁开挖 30 厘米深的沟，然后顺序向前刨挖，因板蓝根较深，要刨到 50 厘米以上才不至于刨断刨伤，把刨出的根晾晒至六七成干，去掉泥土，然后捆成小捆，再行晾晒至充分干燥为止，每 666.7 米 2 能收干根 150-200 千克。 In late June , the leaves can be harvested once when the seedlings are 15-20 cm in height in the north , and stubble 2 to 3 cm from the base of the stem when cutting. When the leaves re-grow (August ) , they can be cut again. The secondary leaves, dried after harvesting, are used as medicinal large green leaves. When planting a small amount, the surrounding old leaves can be used, leaving the central new leaves to continue to grow. In October , the ground is withered, and the roots are harvested. Excavate 30 cm deep next to the hoe. And then digging in sequence, because the root of Isatis indigotica is deep, it must be planed to more than 50 centimeters to prevent it from being cut and cut. Dry again until it is fully dry, and it can collect 150-200 kg of dried roots per 666.7 m2 . It is better to be thick and uniform, dry and neat, and powdery.
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