(1) greenhouse incubation
The new varieties of Zizania latifolia Bunge can be Shuangji Zizania latifolia Bunge No.2, Zizania latifolia Bunge No.9 1, Zizania latifolia Bunge No.991,Zizania latifolia Bunge No.0/,Zizania latifolia Bunge No.41and Yueqing Zizania latifolia Bunge. Generally, in the old water bamboo field, from late February of 65438 to mid-October of the following year/kloc-0, after the ground stems and leaves died, the ground plastic film was cut off. After the weather gets warmer in February and March, you can open the film at both ends for ventilation during the high temperature period (around noon) every day. When the greenhouse temperature is above 30℃, the skirts on both sides should be opened for ventilation to prevent the seedlings from being burned. After Tomb-Sweeping Day, all the plastic films were removed and cultivated in the open space. Relying on the greenhouse to keep warm, it can be harvested and listed in the first half of April. The harvesting time can be 1 ~ 2 months earlier than that of conventional open cultivation, and the market benefit is good. At present, the main greenhouse facilities are bamboo frame greenhouses, which are 5.5 meters wide and 1.7 meters high, and the length depends on the field. Six rows are planted in the shed, generally 2 kinds of 2,200 ~ 2,400 piers every 667 meters.
(2) Alpine cultivation
Kong Qiu Zizania latifolia is a single-season variety with early maturity and cold tolerance. It is planted in the alpine base above 600 meters above sea level and cultivated in the open field. Transplanting 65438+1 early October to165438+1late October, and harvesting from late August to early September of the following year, which is1month earlier than single-season water chestnut cultivated on flat land, and better than autumn water chestnut cultivated in open field. At this time, it is the annual off-season of high-temperature vegetables in summer and autumn, and the products are in short supply.
(3) cold water cooling culture
This is a new technology that uses cold water irrigation to reduce the field temperature and promote the early listing of double-season water chestnut.
Hangzhou Vegetable Science Research Institute used Xin 'anjiang cold water irrigation to cool down, so that the water bamboo on both sides of Xin 'anjiang was listed in August, which was very popular in the market and had high economic benefits. In Yiwu, Gushi Village of Shangyang Township used the cold water from Gaoshan Reservoir to cool down, which advanced the market period of local single-season rice from the original September 65438+ 10 to the end of August and the beginning of September, just in time to catch up with the "Qiu Guang" market supply, and the social and economic benefits were obviously improved.
To implement the "cold water cooling cultivation" technology, we need to grasp the following points:
① Choose fields with abundant cold water resources and varieties (such as intermediaries) with less strict requirements on pregnancy temperature.
(2) Fertilization should be based on base fertilizer, and the application time and dosage of topdressing should be scientifically mastered, so that the tillering of Zizania latifolia will end around the end of July and enter the booting stage on time.
(3) From the end of June, continuous cold water cooling can be carried out all day or during the high temperature of 10- 17 every day. The water layer should be kept at 14 ~ 20cm. Use enough cold water to ensure the cooling effect.
(4) The cooling water effect of centralized slicing is better than that of small area.