Schedule for fertilization, spraying, worming and drying of rice why hybrid rice can't leave seed

Maybe in the city, people don't know much about growing rice. But in the countryside, almost every household will plant some rice. This will not only be self-sufficient, but also reduce household expenses. Next, I'm going to talk to you about when we grow rice, when we fertilize, fertilize, treat insects, and sun up the fields.

Schedule for fertilizing, spraying, worming and drying rice fields

Sowing seeds from April 15th to 28th, transplanting period, ending at the end of May. Regulating fertilizer was applied to the remaining tillering fertilizer from the end of 7th leaf to the end of 8th leaf (June). Killing insects to prevent leaf miners. 1d-2d before seedling raising. Sun Tian. 3d-5d drainage and sun-drying before effective tillering metaphase. Sun field to reach the pool surface cracks, the ground to see white roots, leaves quite light, sun field 5d-7d, sun until the pool surface cracks to see white roots.

Why can't hybrid rice leave seed?

The main results are as follows: 1. the principle of hybrid rice is to make use of the heterosis of parents, so although the offspring will inherit the excellent traits of their parents, their genotypes are heterozygous. If the seed continues to be planted, the offspring will have gene segregation and inconsistent phenotypes. can not be inherited stably.

2. Academician Yuan Longping has put forward the development road of hybrid rice, that is, gradually from three-line method to two-line method and then to one-line method, but two-line method is still being used for breeding. The so-called "one-line method" is to steadily control the genotype through cell fusion technology, which will be the high point of the technology.

Selection of Rice Seedling Field

Choose neutral and acidic garden fields with flat terrain, leeward to the sun, good drainage, convenient water source, loose and fertile soil as seedling fields. The seedling field is fixed for a long time, fattening year after year and eliminating weeds. In the pure paddy field area, the high platform which is higher than the 50cm of the field surface can be used to raise seedlings, and in the Soda saline-alkali soil area, the seedling bed should be equipped with isolation layer.

How to select rice seeds

According to the local accumulated temperature and other ecological conditions, the varieties with suitable ripening period, high quality, high yield and strong stress resistance were selected. Varieties with strong cold tolerance should be selected in well irrigation area, varieties with strong alkali resistance should be selected in Suda saline-alkali soil area, varieties with 13-14 leaves of main stem should be selected in the first and second accumulated temperate zone, and 10-12 leaf varieties should be selected in the third and fourth accumulated temperate zone to ensure safe maturity before frost and strictly prevent planting in cross-zone. Seed quality. The purity is not less than 98%, the purity is not less than 98%, the germination rate is not less than 85% (seedling rate), and the water content is not more than 14%.

In the above, we have a clear understanding of the time for fertilizing, spraying, worming and drying the fields of rice. I also believe that after the introduction above, we can understand that every serving of food is hard to come by, so in our daily life, we should learn to cherish food and put an end to waste.