Rice Fertilization, Pesticide Application, Pest Control and Field Drying Schedule, and Why Hybrid Rice Seeds Cannot Be Saved

Perhaps in the city, people do not know much about some things related to rice cultivation. But in the countryside, almost every household grows some rice. This not only allows self-sufficiency but also reduces household expenses a little. Next, I will talk with everyone about when exactly rice fertilization, pesticide application, pest control and field drying should be done during rice cultivation.

Rice Fertilization, Pesticide Application, Pest Control and Field Drying Schedule

Sow from April 15 to 28; transplanting period ends at the end of May. Apply the adjustment fertilizer from the end of the 7th leaf to the end of the 8th leaf (June) as the remaining tillering fertilizer. Apply pesticide to prevent leafminer. Do this 1d-2d before lifting the seedlings. Dry the field. Drain and dry the field 3d-5d before the middle stage of effective tillering. Dry the field until cracks appear on the pond surface, white roots are visible on the ground, the leaves are upright and the color is pale; dry the field for 5d-7d until the pond surface cracks and white roots are visible.

Why Hybrid Rice Seeds Cannot Be Saved

1. The principle of hybrid rice is to use the heterosis of the parents, so although the offspring will inherit the excellent traits of both parents, its genotype is heterozygous. If the seeds are saved and continue to be planted, the offspring will show gene segregation, inconsistent phenotypes, and cannot be stably inherited.

2. Academician Yuan Longping proposed the development path of hybrid rice, namely gradually moving from the three-line method to the two-line method and then to the one-line method. At present, the two-line method is still used for breeding. The so-called “one-line method” is to stably control the genotype through cell fusion technology, which will be the high point of the technology.

Selection of Rice Seedling Field Land

Choose flat terrain, sheltered from the wind and facing the sun, with good drainage, convenient water sources, and loose, fertile neutral to slightly acidic garden field soil as the seedling field. The seedling field should be fixed for a long time, fertilized year after year, and weeds eliminated. In pure paddy field areas, high-platform seedling raising 50cm above the field surface can be used; in soda saline-alkali soil areas, the seedling bed should be provided with an isolation layer.

How to Select Rice Seeds

According to local ecological conditions such as accumulated temperature, select approved and promoted varieties with suitable maturity, high quality and strong stress resistance. Well irrigation areas should choose varieties with strong cold tolerance, and soda saline-alkali soil areas should choose varieties with strong alkali resistance; the first and second accumulated temperature zones should choose varieties with 13-14 leaves on the main stem; the third and fourth accumulated temperature zones should choose varieties with 10-12 leaves, to ensure safe maturity before frost and strictly prevent cross-region planting. Seed quality. Purity not less than 98%, cleanliness not less than 98%, germination rate not less than 85% (seedling rate), moisture content not higher than 14%.

In the above, we have a very clear understanding of the timing of rice fertilization, pesticide application, pest control and field drying. I also believe that through the above introduction, everyone can understand that every portion of food is hard-earned, so in daily life, we should all learn to cherish food and put an end to waste.