Shallow-water lotus root should be selected for shallow-water cultivation of good quality, strong resistance, yield and high efficiency of good varieties of lotus root, such as E lotus four, E lotus five, Hainan Chau, Wulian 2 and so on. Seed root is best to have more than 3 to 4 sections, child root, grandson root complete whole root. Requirements for the seed root is thick, strong, buds strong, no pests and diseases, no damage.
(2) Choose fertile clay loam fields
The product organs of lotus root are formed in the underground soil. Therefore, planting shallow water lotus root root field to be able to retain water storage, rich in organic matter, deep silt layer, fertile clay loam soil is most suitable.
(3) build the pool on the soil
The ground should be solid and level, the bottom of the pool can be paved with 0.3 to 0.4 millimeter plastic cloth (seepage-proof membrane), mainly to prevent seepage and heat preservation. If you use ordinary HDPE seepage control membrane in the laying is completed, you can pour 3 to 5 centimeters thick concrete (proportion of cement 1, fine sand 5). Pool wall with hollow brick masonry, pool wall height of 40 cm (2 layers of hollow brick) masonry plastic sheeting to be paved, plastic sheeting to be in the pool outside the remaining 10 to 15 cm (masonry after the remaining plastic sheeting folded with the earth can be surrounded). The corners of the pool should be sandy gray (to prevent cracking on the corner of the pool after filling and draining), and the inside of the pool wall should be smoothed with fine gray. If you use anti-oxidation type seepage control membrane can be used directly bare, that is, after laying can be laid directly on the seepage control membrane laying clay. The outer wall can be filled with soil (or smoothed with fine gray if available). After the cement surface solidification (5 ~ 7 days) can be a large pool separated by several small pools, long unlimited, wide suitable for 6 ~ 8 meters (medicine, fertilizer, etc. Good operation). Then inside the pool evenly spread 15 to 18 centimeters of clay. The best soil is red clay or black clay, there can be no sand, gravel, etc..
(4) reasonable dense planting
Lotus root planting density and ripening, yield has a close relationship, appropriate dense planting, there is an early ripening to increase production. General early maturity varieties density: row spacing 2 meters, hole spacing 0.7 meters. Late-maturing varieties should be appropriately sparse planting, the density of: row spacing 2 ~ 2.5 meters, hole spacing 1 meter or so.
(5) fertilizer and fertilizer and weight
Lotus root growth period is long, fertilizer, shallow water lotus root fertilization is the general principle of fertilizer and fertilizer and weight. Generally 1500 to 2500 kg of manure or manure per acre to do the base fertilizer. Early lotus root is generally 1500 to 2000 kg of manure fertilizer per acre. Fertilizer in three times, focusing on the early stage of lotus root.
(6) scientific control of water level
The general principle of shallow water lotus root water management is shallow, deep, shallow. Sprouting growth period water layer should be shallow, to 4 to 7 centimeters is good, stem and leaf vigorous growth period water layer should be deeper, to 12 to 15 centimeters is good. The water layer should be shallow during the rooting period, 4 to 7 centimeters is good.
(7) diligently turn lotus root tips, timely weeding
In the lotus root stem and leaf growth period, lotus root whip grows rapidly, when the roll of leaves from the edge of the field of about 1 meter, in order to prevent the root tips across the ridge, every 2 to 3 days will be close to the ridge of lotus root tips to the field to the field to turn. Lotus root tips are very tender, the soil and lotus root tips should be turned together to prevent breaking the root whip, and then turn the soil pressure. It is better to turn the root tips at noon. Shallow water lotus growth in the early stage, more weeds, the growth of lotus root impact, should be timely weeding, to artificial weeding and chemical weeding combination is good.
(8) timely harvest
Lotus root in the termination of the emergence of the leaf, the termination of the back of the leaf was reddish, the edge of the base of the standing leaves began to wither when the lotus root has fully matured, you can dig the lotus root market.