Seed production method of hybrid rice seeds

Abstract

The invention discloses a seed production method of hybrid rice seeds. The seed production method comprises the following steps: step 1, a high-activity seed production area is selected for hybrid rice seed production; step 2, a special sprayer is used for spraying a plant growth regulator in the flowering period, and the spraying amount is 600 g / hm<2>; and pollination is carried out, the pollination days are shortened, and the pollination days are controlled to be 3-5 days; step 3, after pollination is finished, the special sprayer is used for spraying an activity optimizing agent; step 4, harvesting is conducted within 15-20 days after pollination is completed; wherein the special sprayer used in the step 2 and the step 3 comprises a water containing tank, a water adding opening formed in the upper portion of the water containing tank, a bearing belt, a power bin, a control assembly, a pressurizing assembly, a pressure releasing assembly and a spraying assembly. According to the method, the quantity of glumous flowers for intensively receiving pollens is increased by increasing the parental row ratio, so that the ripening uniformity and vigor level of seeds are improved; and meanwhile, the special sprayer is provided, the spraying quantity of an agent tray can be controllable, and the influence of manual control on seed cultivation is improved.

Description

technical field [0001] The invention belongs to the technical field of plant hybridization, in particular to a method for producing hybrid rice seeds. Background technique [0002] Seed vigor is a comprehensive indicator, which refers to the comprehensive performance of seeds in terms of germination, emergence, and seedling capacity and characteristics, that is, seeds with high vitality germinate early, have a high rate of emergence and seedling growth, and have strong adaptability to harsh environmental conditions. In addition to being affected by individual development status and seed genetic characteristics, seed vigor is also affected by many external factors, including seed development conditions (nutritional conditions, maternal vitality, planting density, light, temperature, water and air conditions), and harvest time and Post-harvest seed drying measures, all of the above are limiting factors affecting the vigor of seeds; [0003] The existing hybrid rice seed produ...

AI Technical Summary

Problems solved by technology

[0003] The existing hybrid rice seed production process is often due to unscientific selection of seed production areas, cultivation measures, and recovery processing processes, resulting in low hybrid rice seed production yields and low seed vigor;

[0004] At the same time, the existing hybrid rice seed production process will use exogenous hormones and plant growth regulators, and use conventional sprayers to spray the test field. Conventional sprayers use gas pressure to spray liquid, which requires a lot of physical effort to spray the sprayer. Pressurization; even if it supports an electric sprayer, energy consumption will be very fast, because a large amount of energy will be converted into heat energy and dissipated during the process of pressurization, which will increase the temperature of the gas and the pressurization device, and at the same time , the air pressure ejection method adopted by the conventional sprayer, the spray air pressure is different, the speed of the liquid ejected by the sprayer is different, the dose sprayed per unit time is different, it is impossible to accurately count and control the spray volume, thus forming a new irrelevant variable , not conducive to the cultivation of seeds

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