Paddy rice dense seeding plantlet planting method

Abstract

The invention discloses a planting method for densely-seeded rice seedlings. According to the thousand seed weight of rice seeds, the seeds are divided into three stages, namely, a low thousand seed weight variety, a medium thousand seed weight variety and a high thousand seed weight variety; determining the use amount of seeds in different grades, and determining the optimal sowing amount per unit area; a three-stage temperature control method is adopted for seedling raising, aiming at the problems of seedling cultivation and seedling floating in a dense seeding plantlet transplanting technology, the invention provides a method for taking the thousand seed weight of rice as a dense seeding standard, and the comprehensive quality of seedlings of varieties with medium and low thousand seed weight is remarkably improved and the chlorophyll content and the plant biomass are increased during dense seeding; under the condition of not changing the conventional sowing seed amount, the use amount of seeds with medium and low thousand seed weights is reduced, the seed cost is saved, the seeds are averagely saved by 25% for varieties with low thousand seed weights, and the seeds are averagely saved by 10% for varieties with medium thousand seed weights; three-section temperature control seedling raising is adopted, an anti-floating seedling recovering conditioner is additionally applied, the root system has many roots, the machine-transplanted seedling block proportion is large, the seedling floating problem of dense seedling machine transplanting is remarkably solved, early seedling reviving is promoted, and the yield increasing effect is remarkable.

Description

A method for planting densely sown seedlings of rice technical field The present invention relates to the technical field of rice planting, and specifically refers to a method for planting densely sown rice seedlings. Background technique [0002] Now rice production is changing from retail production to large-scale production, and it is necessary to continuously improve the level of rice mechanization. but At present, the conventional machine-transplanting technology has high cost of seedling materials and labor, and reducing the cost of machine-transplanted rice seedlings has become a top priority. rice Dense seedling planting technology is a new technology that has been promoted in recent years, mainly by increasing the number of seedlings in the seedling tray, reducing a large number of The number of machine-planted trays saves a lot of resources such as nutrient soil, fertilizers, inoculants, and seedling trays required for seedling raising, which has obvious labo...

AI Technical Summary

Problems solved by technology

[0003] At present, when the dense seedling machine transplanting technology is applied in production, the quality of different varieties of seedlings is quite different, resulting in different speeds of greening among varieties and serious decline in yield.

Dense seedling sowing technology follows the traditional sowing method, which can easily lead to excessive sowing density, resulting in seed waste and reduced yield; large-grained seeds may easily lead to inappropriate sowing density, missing seedlings, missing trees, etc.

When the rice seedling machine is transplanted, there is a water layer in the field, which is prone to large-scale floating and inverted seedlings, resulting in uneven distribution of seedlings in the field, requiring additional seedling replacement, increasing the workload, and even affecting the progress and season of rice planting.

In addition, when the dense seedlings are transplanted by machine, the seedlings are small, the root system has less soil and is easy to scatter, the unit seedling is insufficient in nutrition, the greening speed is slow, and the seedlings are easy to die

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