Rice throwing seedling old seedling raising method

Abstract

The invention discloses a rice throwing seedling old seedling raising method. The method comprises the following steps: 1, seedbed selection; 2, seedling tray selection; 3, variety selection and seed use amount; 4, arrangement of sowing time; 5, seedbed fertilization and arrangement; 6, compartment making and seedling tray laying; 7, slurry paving and filling; 8, sowing; 9, covering of a non-woven fabric; 10, ditch cleaning and drainage; 11, uniconazole spraying; 12, seedbed moisture management; and 13, controlling of the throwing and transplanting seedling age and the seedling quality. According to the method, in the seedling raising process, the seeding quantity is properly increased, early tillering is promoted to increase the number of throwing-planted basic seedlings, vegetative growth of the seedlings is controlled through middle and later drought stress, meanwhile, root crossing between pots is prevented through continuous drought pipes, and uniconazole is sprayed in an auxiliary mode to adjust and control the vegetative growth of the seedlings, the situation that the seedling age of the older seedlings reaches about 50 days, and the leaf age of the older seedlings reaches 5.5-6.0 leaves is facilitated, and the older seedlings are suitable for manual throwing planting.

Description

technical field [0001] The invention relates to the technical field of rice seedling raising methods, in particular to a method for raising older rice seedlings by throwing seedlings. Background technique [0002] Rice throwing saves time and labor, saves water and fertilizer, has high efficiency and great potential for increasing production. With the invention, popularization and application of the "mud method" seedling raising technology of throwing rice seedlings, the area of ​​throwing seedlings in southern Henan has rapidly expanded, and it has become the most important method of rice transplanting in winter fallow fields and rapeseed stubble in southern Henan. 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 s...

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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