A kind of seedling raising method of throwing rice seedlings and older seedlings

Abstract

The invention discloses a method for raising seedlings of older rice seedlings by throwing seedlings, which comprises the following steps: Step 1, seedbed selection; Step 2, seedling tray selection; Step 3, variety selection and seed quantity; Step 4, sowing date arrangement; Five, seedbed fertilization and finishing; step six, laying boxes and seedling trays; step seven, laying mud; step eight, sowing; step nine, covering non-woven fabrics; step ten, clearing ditch drainage; Uniconazole; step 12, seedbed water management; step 13, seedling age and seedling quality control; in the invention, in the process of raising seedlings, increase the basic seedlings by appropriately increasing the seeding rate and promoting early tillering, and The vegetative growth of seedlings is controlled by drought stress in the middle and late stages, and at the same time, the vegetative growth of seedlings is regulated and controlled by continuous drought management to prevent root stringing between pots and supplemented by spraying uniconazole, so as to facilitate the cultivation of seedling age to about 50 days and leaf age to 5.5‑6.0 leaves, and is suitable for artificial throwing of older seedlings.

Description

technical field [0001] The invention relates to the technical field of a method for raising rice seedlings, in particular to a method for raising rice seedlings by throwing and planting seedlings at an older age. Background technique [0002] Rice throwing saves time and labor, water and fertilizer, high efficiency and great potential for increasing yield. With the invention and popularization and application of the "muddy method" seedling raising technology for rice throwing and planting, the area of ​​throwing seedlings in southern Henan has expanded rapidly, and it has become the most important method for transplanting rice in winter idle fields and rape stubble in southern Henan. However, the maximum seedling age of this method is controlled within 25 days, and the suitable sowing period of wheat stubble and indica rice in southern Henan and its surrounding areas is mid-to-late April, while the wheat harvesting stubble period is from the end of May to early June, and the...

AI Technical Summary

Problems solved by technology

However, the maximum seedling age of this method is controlled within 25 days, and the suitable sowing period for wheat stubble and indica rice in southern Henan and its surrounding areas is in the middle and late April, while the stubble harvesting period for wheat is from the end of May to early June, and the sowing period for indica rice is at the end of May. The interval between harvest and stubble is as long as 45-55 days. Due to seasonal conflicts or untimely centralized water supply, 20-30% of indica rice transplanting is even postponed until mid-June, making it difficult for the seedling throwing technique to be used in wheat stubble indica rice. Application in production, nearly 4 million mu, accounting for 50% of the rice stubble transplanting in southern Henan still relies on manual hand transplanting, solving the urgent requirement for rice development in southern Henan and its surrounding areas to solve the problem of throwing seedlings with long seedling age. It is necessary to throw seedlings and raise seedlings for older seedlings

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