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杂交水稻防杂保纯和提纯复壮基本原理和技术,与其他农作物品种相比,既有共同性也有特殊性.这里主要讨论研究这方面的理论与实践. 一、杂交水稻的纯与杂问世不久的杂交水稻,大田生产的群体结构整齐一致.真是“高矮似刀切,成熟金黄色,棵棵是杂交,高产又整洁(抗病)”.这就是杂交水稻纯的表现. 随着种植年代的延续,推广新区的发展,尤其只顾加速繁殖种源,不注意防杂保纯,不搞提纯复壮的少数地方,已经出现“远看一片绿油油,近看高矮三层楼,五花八门样样有,十成长相八成收”的新情况.这就是杂交水稻的混杂、退化现象.
The basic principle and technology of hybrid rice protection, purification, rejuvenation and rejuvenation are both common and particular compared with other crop varieties .This paper mainly discusses the theory and practice in this field. Of the hybrid rice, field production group structure neatly. “Height like dagger, mature golden yellow, Keke is hybrid, high yield and neat (disease resistance) ” This is the pure performance of hybrid rice .As the planting The extension of the era, to promote the development of new areas, especially only to speed up the breeding of provenances, do not pay attention to anti-miscellaneous and pure, do not engage in purification and rejuvenation of a few places, there have been “far look at a green, look nearly three floors high and low, There is a new situation in which 10 percent of the population grows up to 80 percent. ”This is the hybridization and degradation of hybrid rice.