Management of booting stage of Rice in August
I. Field management at booting stage
After a good vegetative growth in the early stage, rice enters the reproductive growth stage in the middle and later stage, so it is very important to strengthen the water and fertilizer management in this stage for high yield. The skillful application of panicle fertilizer depends on the field growth of rice: the number of stems per mu is too much, the number of stems per mu is not applied, the number of stems per mu is insufficient, and fertilization in the land with yellow leaves can increase yield obviously.
The main results are as follows: 1. Applying panicle fertilizer: around August 5, the land without early panicle fertilizer (mid-late July) has yellow leaves at this time, but urea can be applied to 5-7 jin per mu. At this time, the plant growth is exuberant and the leaf transpiration is large, which is the period when the most water is needed, so there can be no shortage of water, which will increase the abortion of spikelets and the increase of empty grains, resulting in a decrease in yield and irrigation of 3-5 cm.
2. Applying grain fertilizer: in the middle of August, if the leaf color turns yellow at full heading stage, grain fertilizer should be applied, and the 1000-grain weight can be increased by applying urea 5 jin per mu. Heading to full heading stage is the second critical period of water demand, to maintain the water layer (1-2 cm) when the water-deficient pollen and stigma are easy to dry up, can not be pollinated, increase the empty shell, after heading, irrigate stubble water, with dry and wet water management, conducive to root oxygen protection, roots to protect leaves, leaves to strengthen seeds.
II. Control of diseases and insect pests
1. Control the second generation of Chilo suppressalis: spray with 500 times insecticidal cream, 30 kg per mu.
2. Prevention and control of rice blast: timely control when central diseased plants are found. Spray with 5% carbendazim, 100 grams per mu and 60 kilograms of water.
3. Control of rice false smut: spray with 5% Jingangmycin 250-300 grams per mu with 25-30 kilograms of water 7-10 days before heading.
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Management measures for jointing and long panicle stage of Rice
At present, the growth of rice in the city has gradually entered the stage of jointing and panicle growth, which is not only an important period for the transformation from vegetative growth to reproductive growth, but also a key period to determine yield. To do a good job in the field management of rice in the middle and later stage is very important for protecting full panicle, attacking large panicle, shaping high-yield plant type and setting up high-yield shelf. 1. Seedling characteristics according to the survey on July 21, the average leaf age of mechanically implanted rice was 12.31, 0.49 more than that of the same period last year, the average leaf age of direct seeding rice was 10.31, 0.56 more than that of last year, and the total number of tillers was 38.63.
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Eight measures for safe use of Rice
1. Reasonable selection of varieties. Rice blast is the main disease affecting harvest, and the difference of resistance among different varieties is very obvious. The selection of varieties with strong resistance is one of the most effective prevention measures. In the old rice blast area and the cold soaking field in the shade, first, the resistance of the varieties should be carefully understood when selecting and purchasing seeds; second, the new varieties can only be planted in a small amount before being popularized; third, imported Fuji No. 1 should be used for prevention in the early stage of the disease and the stage of booting and heading. Where the humidity is high in the mountain area, it is not suitable for late hybrid rice to choose and purchase two-line hybrid late rice combinations to prevent rice false smut.
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