1, good seed selection: medium ripe large purplish red lotus root, the main root section 4-5 sections.
2, seed lotus root treatment: choose strong germination, 2-3 sections, weighing 0.5kg or more of the main lotus root for seed lotus root, or choose large lotus root for seed lotus root. After the lotus root is dug, it should be planted as early as possible, consuming 300-400 kilograms of seeds per mu. Before planting, spray lotus root spray with 70% methyl 800 times liquid and 800 times liquid.
3, land preparation: choose convenient drainage and irrigation, stable water level, fertile soil field planting. In the spring, apply 5000 kilograms of rotted organic fertilizer per mu. Half a month before planting, combined with land preparation, apply 50 kilograms of compound fertilizer and 150 kilograms of quicklime per mu.
4, timely planting: early and mid-April, row spacing 2-2.5m, hole spacing 0.7-1m, each hole planted 1 main lotus root or 2 secondary lotus root. After planting, the field maintains a 3-5cm water layer, the water layer gradually deepens to 20-30cm after the leaves come out, and the water layer gradually drops to 15-20cm after the leaves come out.
5, Lotus field weeding: Lotus field weeds are mainly flooded weeds. Before the Qingming, each mu with 50% puff grass net wettable powder 80-100 grams, plus water to seal the soil. late April, with 12.5% ml of 40-60kg of emulsified oil and water to go to the lotus root, the lotus root is mainly composed of thousands of leaves of gold, jatropha, reeds and so on. There are still weeds in the field after chemical weeding, which can be pulled out manually.
6, fertilization of different fields: fertilization of new root fields twice. The first time is May 20 to 30 in the lotus root field with 50 kg of ammonium bicarbonate, 25 kg of urea and 50 kg of special compound fertilizer or compound fertilizer; the second time is June 20 to 30, 40 kg of urea per mu, 50 kg of special compound fertilizer. Planting more than 2 years of lotus root field, fertilizer once, May 20 around 50 kg of urea, special compound fertilizer 50-75 kg.
7, turn the head of the lotus root: continuous field without turning the head of the lotus root. When lotus root is planted in a field, the head of lotus root should be turned to the field, and the head of lotus root should be turned to the blank.
8, pest control: pay attention to the prevention and control of stiff root and root-eating Jinhua pests. The main measures to prevent and control the stiff root is crop rotation, choose disease-free fields and disease-free lotus root planting, remove the residual branches and leaves in the field after harvesting, and apply appropriate phosphorus and potassium fertilizers in the middle and late stages. in mid- to late-May, dilute 100-150ml of 5% Lijin SC with 1kg of water (100ml in the new lotus root field, and 150ml in the old lotus root field), and mix it with 10kg of fine soil.