How to grow double-season Zizania caduciflora

In the process of agricultural industrial structure adjustment, local farmers actively expand the planting of Zizania caduciflora to improve economic benefits. Two seasons of Zizania latifolia were harvested in early summer from October to November in the following year, the yield per mu was about 3000 kg, the income per mu was up to 4000000 yuan, and the highest was more than 10,000 yuan. Variety selection: among the excellent varieties of double-season Zizania caduciflora, the new varieties of Zizania caduciflora No. 2 and No. 991, which were selected by the Horticulture Department of Zhejiang University for more than ten years, won the Science and Technology Progress Award of the Ministry of Agriculture in 1993 and 1997 respectively. Secondly, it is recommended to select local varieties such as Zizania latifolia, intermediary Zizania latifolia, Zizania latifolia and Zizania latifolia, which requires strong resistance, high yield, good quality and good appearance. Cultivation season: there are two kinds of Zizania latifolia planted in spring and in summer and autumn. Spring planting is planted in early April and summer and autumn planting from June to July. Soil preparation and fertilization: Zizania caduciflora plants are tall, the growth period is long, the growth is exuberant, the amount of fertilizer is large, and the deep ploughing is 17-20 cm. Base fertilizer per mu of organic fertilizer such as pig and cow manure 1000kg to 1500kg, or cake fertilizer 100kg, or nitrogen, phosphorus, potassium compound fertilizer 50kg 60kg. Reasonable close planting: Zizania latifolia seedlings should be planted with digging, ramet and colonization. Cut off the leaf tip before planting, retain the plant height of 25cm to 30cm, choose to plant in the evening or cloudy day, which is beneficial to the return of seedlings and survival. Before planting, the Zizania caduciflora field was irrigated with shallow water, the row spacing of planting plants was 60 cm × 70 cm, about 1200 piers were planted per mu, and 1 seedling was planted in spring or 2 plants in summer and autumn. Fertilizer for looking at seedlings: applying "seedling lifting fertilizer" once 7-10 days after planting, applying urea or compound fertilizer 5-10 kg per mu to promote seedling growth; applying the second topdressing fertilizer at the middle tillering stage, applying 20 kg urea per mu, or 30 kg compound fertilizer, or 50 kg ammonium bicarbonate to promote the tillering growth of Zizania latifolia seedlings. After entering the pregnant stage, the third topdressing was applied, which was called "pregnant Zizania latifolia fertilizer". Urea or compound fertilizer was applied to 20kg / mu to promote the growth of pregnant Zizania latifolia and stem and increase the yield. Ploughing fields to peel yellow leaves: after planting Zizania caduciflora seedlings, ploughing the fields for 2 or 3 times. When ploughing the field, first put the water shallow, combined with topdressing, fertilize the field first and then plough the field. In mid-July and mid-August, the yellow leaves were peeled twice, and then the yellow leaves were stepped into the soil as fertilizer. After peeling yellow leaves, the field of Zizania caduciflora is ventilated and transparent, the growth of Zizania caduciflora is stout, and the disease is less. Control of diseases and insect pests: the main diseases and insect pests of Zizania caduciflora are stem borer, rust and flax leaf spot. Control borer in mid-July and mid-late September, spray with 5% Regent suspension 160ml, add 50kg of water. Rust and flax leaf spot were sprayed once in June-July and September-October, respectively. 20% triadimefon powder 35-50g, mixed with water 50kg, had obvious control effect. Appropriate harvest: autumn Zizania latifolia was harvested from October to November. The yield per mu of Zizania latifolia was 1250-1500 kg every 4-5 days, and that of Zizania latifolia was 1 500-1 750 kg per mu from May to June with an interval of 2-3 days, and 1 500-1 750 kg per mu in the late harvest.