Method for producing hybrid seeds of rice by seedbed seedling raising and field film mulching intensified cultivation

Abstract

The invention discloses a method for producing hybrid seeds of rice by seedbed seedling raising and field film mulching intensified cultivation. The method comprises the operation steps: selecting a dry field as a seedbed for cultivating seedlings; mulching a film, and transplanting a male parent and a female parent; carrying out field water management, topdressing as well as disease and pest prevention and control; spraying gibberellin on the female parent and the male parent; removing hybrid seeds and retaining pure seeds; and carrying out artificial pollination; and the hybrid seeds of riceare produced in a plastic film or biodegradable film mulching way, a large three-dimensional intensified cultivation way or a conventional-density planting way, wherein the hybrid seeds of rice include sterile parent seeds. By using the method, rice hybrid seed production can be realized, the purity of the propagated seeds is increased by 0.2-0.5%, the yield per mu of the seeds is increased by 8-15%, the growth speeds of the male parent and the female parent are increased under the heat insulation action of a plastic film or a biodegradable film, so that the mature period is earlier, a variety with a long growth period, such as II-32A, can be matured 7-10 days ahead of time, and a variety with a short growth period, such as Wufeng A, can be matured 2-3 days ahead of time, the area of a rice field is reduced, the management expense of the rice field is reduced, the use amount of female parent seeds is reduced, and 1-1.5kg of female parent seeds are saved per mu.

Description

technical field [0001] The invention relates to the technical field of rice cultivation, in particular to a method for producing rice hybrid seeds through intensified cultivation of film-covered seedlings in seedbeds and fields. Background technique [0002] my country is a country that consumes a lot of food. With the continuous rapid growth of my country's economy, urban development and infrastructure construction occupy a large amount of cultivated land, which has caused a large reduction in the agricultural cultivated area in many provinces. How to produce more food with less cultivated land has become a major issue in my country's agriculture. An increasingly pressing problem in production. [0003] Hybrid rice seed production is an important link in the utilization of rice hybrid vigor, and seed production capacity determines the degree of hybrid rice popularization and application. With the development of China's social economy and agricultural production, the hybrid ...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of method for seedbed cultivation field film-covered intensive cultivation to produce rice hybrid seeds, to solve the problems of hybrid rice seed production, reproduction, seed purity, quality and yield, the present invention is realized through the following technical solutions:

Images