Morphological features of the perennial marsh plants of the family of Algaeaceae. With underground bulbous tuber. Leaves all basal; petiole 5-50 cm long, base expanded sheath-like, leaves elliptic, long elliptic or broadly ovate, 2.5-18 cm long, 1-9 cm wide, apical acuminate, acute or convex, base cordate, subrounded or cuneate. Scape erect; flowers in whorls umbrella-shaped, the pedicels of umbels 2--4 cm long, then forming large panicles; flowers bisexual, outer whorl of tepals 3, sepal-like, broadly ovate, 2--3 mm long, 1.5 mm wide, inner whorl of tepals 3, petaloid, white, smaller than outer whorl, stamens 6; carpels numerous, verticillate, styles shorter than or equaling ovary, curved. Achenes flattened on both sides, dorsally with 1-2 shallow grooves, 1.5-2 mm long, 1.5 mm wide, styles persistent.
I, growth habit Zelda like warm and humid, sunny environment. Cold hardy, but cold and frost early place planting low yield. Seedlings like shade, afraid of strong light, into the plant like sunlight. Suitable for growing in shallow fields. The soil requirements are not strict, but humus-rich clay loam or rice paddy cultivation is good. Sandy soil or cold water fields are not suitable for planting. Avoid continuous cropping.
Two, land preparation and fertilization Selected suitable for the growth of the water field, combined with land preparation, fertilization: 3000 kg of soil fertilizer per acre, 20 kg of urea, 50 kg of phosphate and potash, and then made into a 1.3-meter-wide raised beds, waiting for the sowing.
Three, seeding Zelda with seed propagation. Seedling and transplantation in two steps. Sowing period for the middle of June to early July. Too early transplantation, easy moss flowering; too late, short growing period, low yield. Seedling Before sowing, first soak the seeds of zelda in water for 24 to 48 hours, and then germinate. When the seeds spit white can be sown. When sowing, mix the seeds and grass ash evenly, and then evenly sprinkle on the whole bed. With a broom patting pressure bed, so that the seeds and the soil layer of diarrhea dense connection, to be slightly dry cracked bed soil, that is, irrigation shallow water. Prevent the seeds from drifting when the water is too full. Sowing amount of 1 kilogram per mu. Seedling 1 mu can transplant 30 mu. Zelda seedlings, strengthen field management, cultivate about 45 days, can be transplanted. Transplanting is generally carried out between the beginning of the fall and the end of the summer. The cultivation of diarrhea seedlings according to the rows and plants spacing 30 × 25 cm planting in the rectified bed. Watering to maintain moisture, in order to facilitate the survival.
Four, field management of diarrhea seedling or live, pay attention to plowing and weeding. Because of the diarrhea like shallow water, it is often to maintain the depth of 3 to 5 cm of water on the bed. Underground rhizome expansion period should reduce the field water, maintain the water depth of about 1 cm. after mid-November, gradually drain the field water, ready to harvest. Zelda moss pumping flowering, should be removed in time scape, to prevent nutrient depletion.
Five, pest and disease prevention and control of diarrhea disease mainly white spot disease, can be used in the early stages of the disease with zinc manganese zinc control. Pests are mainly diarrhea constrictor aphids can be oxidized to kill. Underground pests with octopus scale with bait trapping.
Six, harvesting and processing of diarrhea is generally in the winter before and after the withering of the above stems and leaves harvested. Will be dug out of the underground rhizome of diarrhea to remove the stem and leaves and roots, sun-dried or dried into the cage to hit the residual roots and rough skin, so that the appearance of smooth. Can be sold. Mu yield 250 kilograms. China organic agriculture network