Detailed Explanation of Key Field Management Techniques for Asarum

Shading: If the cultivation ground has no natural forest shade, remove the mulch before emergence, then immediately build a shade shed, 80-100cm high, covered with wormwood grass, sorghum stalk blinds or nylon netting.

Topdressing: Asarum likes fertilizer. On the basis of applying sufficient base fertilizer, apply topdressing 2 times per year, the 1st time in early to mid-May, the 2nd time in mid to late July, that is, mix well decomposed pig manure (5kg/sq m) and superphosphate (100g/sq m), then open furrows between the rows and apply it.

Cultivation and weeding 3-4 times per year. When cultivating, the edge of the bed should be shallow, the middle slightly deeper, shallow hoeing near the roots, deep hoeing between the rows, with the principle of not damaging the roots.

Drought prevention and drainage: Asarum is a fibrous-root plant, with roots mostly distributed within the 15cm soil layer, and it is afraid of both drought and waterlogging. In Northeast China, drought often occurs from mid-May to late June, and when drought occurs, water should be applied in time; July-August is the rainy season, so drainage ditches should be dug in advance, and after rain, standing water in the field should be drained promptly.

Removing shade materials: After mid-September, remove the shade materials; after the aboveground part withers, clean the bed surface, pick out dead leaves and other debris, take them outside the garden and burn them.

Applying mulch fertilizer in autumn: Before the soil freezes, cover the bed surface with 1-2cm of decomposed farmyard manure (mulch fertilizer) or cover with a layer of dead branches and fallen leaves and press a layer of soil on top. Mulching can keep warmth and moisture and prevent bud scales from frost damage. After the soil thaws the following spring, promptly remove the covering of dead branches and fallen leaves to facilitate emergence.