Direct-seeding seed production method for two-line system hybrid rice

Abstract

The invention discloses a direct-seeding seed production method for two-line system hybrid rice. The method comprises the steps of seeding, field management, purity assurance and harvesting storage, wherein the seeding step comprises the following sub-steps: selecting Huanghuazhan as a male parent, examining and approving a sterile line in promotion mix as a female parent; taking a large-area Huanghuazhan planting area as a seed production field before use; fixing the sowing time according to the sowing date of the male and female parents, and ensuring flower synchronization of the male and female parent; ensuring that the sowing plot width of the male parent is equal to the harvesting width of a harvester, the sowing plot width of the female parent is 1-2 times that of the harvesting width of the harvester, and the spacing between the male parent and the female parent is 40-60cm, so that the male and female parents are conveniently and respectively harvested with machine; and manually transplanting a line of male parents at the seedling age of 22-25 days of the male parent, wherein 2-3 rice seedlings are planted in each stump, the row spacing is 25-40cm, and the spacing between the male parent transplanting line and the direct seeding male parent is 20-30cm. According to the method disclosed by the invention, the problems that the female parent is susceptible to lodging, the seed production yield is low, the weeding difficulty is high, the purity of hybrid seeds is low, the production efficiency is low and the cost is high are solved.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a two-line hybrid rice direct-seeding seed production method. Background technique [0002] Hybrid rice direct-seeding seed production faces two major problems. One is that the direct-seeding female parent is prone to lodging after spraying "920" for pollination, resulting in difficulties in harvesting, yield reduction and ear buds; The heading date is inconsistent, and a large amount of manpower is required to remove impurities before flowering every day. If the removal of impurities is not timely, it is easy to cause pollination to affect the purity of hybrids, and even seed production failure. [0003] In addition, simplicity, high efficiency and mechanization are the development direction of hybrid rice seed production in the future. At present, the light, simple and efficient seed production of hybrid rice in my country is mainly based on the parent machine transplant...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the methods in the above-mentioned prior art, the present invention provides a two-line hybrid rice direct-seeding seed production method, which overcomes the problems that the female parent is prone to lodging, the yield of seed production is not high, the difficulty of removing impurities is large, and the purity of hybrid seeds is not high. , low production efficiency and high cost