Seed production method of hybrid rice

Abstract

The invention discloses a seed production method of hybrid rice, which comprises the following steps of: (1) sowing of seeds and culture of seedlings: determining the sowing time according to the sowing periods of a male parent and a female parent to enable the flowering periods of the male parent and the female parent to be synchronized; (2) field management: carrying out water draining and field drying management based on shallow water mainly, covering the water in time after field drying to prevent and eliminate plant diseases and insect pests, and spraying '920' with power-operated spraying and dusting equipment to expel male parent pollen; (3) impurity prevention and preservation of pure state: ensuring that no sticky rice exists in the range of 200 meters beyond a seed production region and only the male parents of the seed production combination can be planted in the range of 20 meters beyond the seed production region, and killing off abnormal plants before flowering of cereal crops and loosing of powder to ensure the seed purity; and (4) harvesting and storing: cutting off the male parents in the seed farm to ensure that no male parent exists in the seed farm, and clearing a harvesting machine in the processes of harvesting and going to the field to ensure that no other seeds and impurities exist in the harvesting machine. The invention has the characteristics of high working efficiency, less labor demands, low cost, high purity, high quality, high yield and the like.

Description

Technical field:

[0001] The invention belongs to the technical field of agriculture, and in particular relates to a hybrid rice seed production method. Background technique:

[0002] Hybrid rice is produced by crossing different rice species, relying on the female parent and its two objects, namely "three lines" (sterile line, maintainer line and restorer line). In terms of production, a breeding field and a production field are planted. The breeding field is planted with a sterile line and a maintainer line. When they both bloom, the maintainer line transmits pollen to the sterile line with the help of wind, insects, water, birds and other media. , the sterile line gets normal pollen fruiting, and the offspring produced are still the sterile line, so as to achieve the purpose of breeding the sterile line. We can keep a part of the propagated CMS seeds to continue to reproduce in the coming year, and the other part will be produced with the restorer line. When both the CMS ...

Examples

Embodiment 1

[0052] The present invention comprises the following steps (taking the seed production method of Yixiang 2308 variety as an example):

[0053] (1). Sowing seedlings

[0054] ①.Under normal circumstances, the male parent is on March 20th, the female parent is on April 15th, the time difference is 27 days, the leaf difference is 5.6, the first sowing period of the male parent is 117 days, and the first sowing period of the female parent is 90 days. The expected earing time of the male parent is On July 15th, the first earing time of the female parent is July 14th, and the dosage of the male parent is 0.5kg per mu of land, so as to set the sowing time to ensure that the flowering periods of the male parent and the female parent meet; ②. The male parent seedling field per mu Use 1500kg of human and livestock manure, 35kg of phosphate fertilizer, and 35kg of ammonium bicarbonate. Urea can also be used instead of ammonium bicarbonate. The amount of urea is 10kg, potassium fertilizer...

Embodiment 2

[0064] The present invention comprises the following steps (taking the seed production method of Zhongyou 18 varieties as an example):

[0065] (1). Sowing seedlings

[0066] ①. Under normal circumstances, the male parent is on March 20, the female parent is on May 20, the time difference is 60 days, the leaf difference is 10.7, the male parent's sowing start period is 123 days, and the female parent's sowing start period is 63 days. The estimated earing time of the male parent is On July 21, the first earing time of the female parent is July 22, and the dosage of the male parent is 0.5kg per mu of land, so as to set the sowing time to ensure that the flowering periods of the male parent and the female parent meet; ②. The male parent seedling field per mu Use 1500kg of human and livestock manure, 40kg of phosphate fertilizer, and 40kg of ammonium bicarbonate. Urea can also be used instead of ammonium bicarbonate. The amount of urea is 10kg, potassium fertilizer 7.5kg, and zinc...

Technical field:

[0001] The invention belongs to the technical field of agriculture, and in particular relates to a hybrid rice seed production method. Background technique:

[0002] Hybrid rice is produced by crossing different rice species, relying on the female parent and its two objects, namely "three lines" (sterile line, maintainer line and restorer line). In terms of production, a breeding field and a production field are planted. The breeding field is planted with a sterile line and a maintainer line. When they both bloom, the maintainer line transmits pollen to the sterile line with the help of wind, insects, water, birds and other media. , the sterile line gets normal pollen fruiting, and the offspring produced are still the sterile line, so as to achieve the purpose of breeding the sterile line. We can keep a part of the propagated CMS seeds to continue to reproduce in the coming year, and the other part will be produced with the restorer line. When both the CMS ...

Examples

Embodiment 1

[0052] The present invention comprises the following steps (taking the seed production method of Yixiang 2308 variety as an example):

[0053] (1). Sowing seedlings

[0054] ①.Under normal circumstances, the male parent is on March 20th, the female parent is on April 15th, the time difference is 27 days, the leaf difference is 5.6, the first sowing period of the male parent is 117 days, and the first sowing period of the female parent is 90 days. The expected earing time of the male parent is On July 15th, the first earing time of the female parent is July 14th, and the dosage of the male parent is 0.5kg per mu of land, so as to set the sowing time to ensure that the flowering periods of the male parent and the female parent meet; ②. The male parent seedling field per mu Use 1500kg of human and livestock manure, 35kg of phosphate fertilizer, and 35kg of ammonium bicarbonate. Urea can also be used instead of ammonium bicarbonate. The amount of urea is 10kg, potassium fertilizer...

Embodiment 2

[0064] The present invention comprises the following steps (taking the seed production method of Zhongyou 18 varieties as an example):

[0065] (1). Sowing seedlings

[0066] ①. Under normal circumstances, the male parent is on March 20, the female parent is on May 20, the time difference is 60 days, the leaf difference is 10.7, the male parent's sowing start period is 123 days, and the female parent's sowing start period is 63 days. The estimated earing time of the male parent is On July 21, the first earing time of the female parent is July 22, and the dosage of the male parent is 0.5kg per mu of land, so as to set the sowing time to ensure that the flowering periods of the male parent and the female parent meet; ②. The male parent seedling field per mu Use 1500kg of human and livestock manure, 40kg of phosphate fertilizer, and 40kg of ammonium bicarbonate. Urea can also be used instead of ammonium bicarbonate. The amount of urea is 10kg, potassium fertilizer 7.5kg, and zinc...

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