Current technical opinions on rice seedbed management
At present, some early sowing areas are affected by the rapid change of temperature of the cold current, rice seedlings have been frozen to varying degrees, which has affected the management of rice field, and will postpone the process of transplanting rice seedlings to a certain extent. In order to do well the seedling field management and reduce the harm of low temperature, the technical suggestions of seedling bed management are put forward.
1. Raising seedlings in small shed. On the shed, according to the weather forecast, add mulch, airtight heat preservation, in case of frost, you can light candles or smoke in the shed to increase temperature and prevent frost; in raising seedlings in the greenhouse, ventilation should be reduced or even not ventilated, grass curtains should be surrounded, and plastic film should be laid in the sheet. and can be used at night 1-2 pot fire or smoke to increase temperature.
2. The management of seedling bed should be strengthened for frozen seedlings. Cool water to slow seedlings before sunrise, after sunrise, the bed should be covered with grass to prevent strong light and avoid temperature rising too fast or high temperature aggravating cold injury, do not cover the seedlings at high temperature.
3. Strengthen the management of seedling field. It is not only necessary to prevent the breeding of weak seedlings from too high temperature in the greenhouse, but also to prevent the breeding of young and old seedlings from low temperature and lack of water, but also to prevent drastic changes in temperature from causing green and blight to cause dead seedlings.
According to the experiment, spraying nano-magnetic energy liquid at rice seedling stage has a significant effect on cold resistance, anti-freezing and strong seedlings.
For the seedlings that have been frozen, nanometer magnetic fluid can also be sprayed, which can effectively alleviate the freezing injury and restore the normal growth of seedlings in a short period of time.
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Technical guidance on current Rice production Management
At present, the production of early rice in China has entered the late growth stage, most of the early rice in southern Guangdong and Guangxi has entered the filling stage, a few of them have entered the mature stage, the middle part of Guangdong and Guangxi has begun to heading, and the north of Guangdong and Guangxi has entered the initial heading stage to heading stage; the early rice in the middle and lower reaches of the Yangtze River has entered the milk stage and the harvest is expected to begin around July 10. The northeast single cropping rice is in the peak tillering stage, young panicle differentiation stage and booting stage from south to north, the middle rice in the southwest winter paddy field is in the booting stage, the young panicle differentiation begins in the valley and hilly region, and the drying stage in Chengdu plain is at the highest seedling stage.
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At present, rice mainly attacks diseases in Guangdong.
Rice bacterial streak, rice blast, sheath blight and bacterial blight are four main diseases in late rice production in Guangdong, which mainly damage plant leaves in the early and middle stages of rice growth. There are many typhoon rice areas along the coast of our province, while rice blast and bacterial leaf spot are the main damage in hills and mountainous areas. In this paper, the occurrence period, characteristics and control methods of bacterial leaf spot, rice blast and sheath blight are briefly described as follows: bacterial leaf streak of rice has a tendency to spread in Guangdong in recent years. The disease begins in seedling stage and flourishes in young panicle differentiation stage. Station
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