Rice mid-late management techniques
In order to strengthen the management of rice in the middle and later stages and ensure the high yield and stable production of rice, the following technical points should be mastered:
First, do a good job of rice grain fertilizer topdressing work
Rational application of granular fertilizer can delay leaf senescence, increase photosynthetic capacity and root vigor, increase grouting material, and increase grain weight. However, the application of granular fertilizer should be appropriate, not too much, depending on the field, see the sky, see seedlings and set, the general field of high fertility is not applied, the field growing thick green plots do not Shi, even in the rainy days do not apply. For the lighter leaf color, the weak growing fields can apply 3-5 kg ​​urea in the late July. Normally growing plots can be followed by foliar fertilizer. Each mu uses 150g urea + 150g of potassium dihydrogen phosphate to 15kg of water and is sprayed in the afternoon after flowering.
Second, strengthen field water management
At present, rice has entered the period of young panicle differentiation, and from now on it has entered the most sensitive period of rice water demand. During this period, it is necessary to prevent chilling damage at low temperatures, and to prevent damage caused by high temperature and drought. In the period of rice nourishment during pregnancy, if it encounters low temperatures (below 17°C) or high temperatures above 35°C before and after the booting and heading, timely irrigation of deep water, string irrigation and water change, water temperature adjustment, and water protection In order to reduce the extreme weather, rice booting, flowering, fertilization and seedling damage. Intermittent irrigation should be adopted during the grain filling period of rice, and it should be dry and wet in the field in order to increase the root activity of rice and maintain the maturity of live roots in later stages of rice. It is advisable to avoid premature water shortage in later stages, which is conducive to full grain filling.
Third, the good pest control
In the middle and late stages of rice growth, it is a period of frequent occurrence of various pests and diseases, and it is also the most critical period for pest control. It is necessary to do a good job of prevention and control of rice blast, especially if the planting density is too large (on-demand field), and nitrogen fertilizer is used Paddy fields with many, late and poor drainage have enhanced field observation due to the lush growth of rice fields, the weak and fragile growth of rice plants, the obstructed field, poor ventilation and light transmission, and the high humidity between plants, which can easily induce rice blast. We must prevent and control the spread immediately to ensure the safe growth of rice.
Control methods: In the initial stage of disease, Mu is sprayed with 40% of Fuji No.1 EC 100ml and 30kg of water. After 10 days of application, if the condition still develops, it should be applied again. The prevention and treatment of panicle blast should be controlled from the end of booting to the beginning of panicle, and should not be controlled too late. The methods of prevention and treatment are the same as above.
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