alarm! The high temperature persists during the filling period, and the authoritative management opinions of the early rice look here.

At present, the early rice in the south is in the period of grain filling and is a key period for the formation of yield. According to the weather forecast, there will be continuous hot weather in the Jiangnan area. The highest temperature in some areas is 37°C-38°C, the local area can reach 39°C-40°C, and the high temperature days may last 6-8 days. Continued high temperature is not conducive to rice filling and fruiting, affecting 1000-grain weight. In response to the current characteristics of early rice growth and meteorology, the Rice Experts Group of the Ministry of Agriculture and Rural Affairs, together with the National Agricultural Technology Extension Service Center, put forward technical advice on the prevention of high temperature in the early stage of early rice growth in 2018.

01

Adjust water with water to lower canopy temperature

When there is a high temperature of more than 35 °C in the grain filling stage of early rice, the field can be filled with deep water, maintain a water layer of 5-6 cm, increase the humidity in the field, and improve the "microclimate" of rice fields. It can also use the daily irrigation night row to accelerate the transpiration of rice leaves. Reduce the canopy temperature. Do not cut off the water too early, and the high temperature is ripe.

02

Chasing grain fertilizer to promote recovery

After the high temperature weather, for the lighter field, the field water and fertilizer management should be strengthened, grain filling should be promoted, grain weight should be increased, and the loss should be reduced. For the heavily damaged field, the seedling fertilizer should be applied, and urea should be applied 2-3 kg per mu or Spraying foliar fertilizer, delaying the falling and yellowing of the leaves, enhancing the photosynthetic capacity in the later stage, promoting grain filling and firmness, ensuring safety and maturity.

03

Strengthen monitoring and control pests and diseases

Under high temperature and high humidity conditions, pests and diseases are prone to increase. It is necessary to strengthen monitoring and early warning, strengthen the prevention and control of pests and diseases that focus on rice “two-shift” pests, rice blast, and sheath blight, vigorously promote green prevention and control and unified prevention, improve prevention and control effects, reduce pesticide dosage, and effectively reduce pest and disease losses. .

04

Harvest at the right time to prevent ear germination

During the harvest of southern early rice, there are more rainfalls and it is prone to spike germination, resulting in reduced yield and quality. It is necessary to prepare materials and technology in advance, and harvest in time. Vigorously promote the operation of the combine harvester with stalk chopping and throwing device to facilitate straw returning and burying, and improve harvesting efficiency. Generally, about 25 days after the heading, the whole ear loses green, and when the hull is 90% yellow, it is harvested. After harvesting, the early rice should be dried or aired to the standard water content in time, and concentrated drying should be promoted to avoid mildew.