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杂交水稻制种田及时彻底地进行去杂工作,是提高制种质量,保证种子纯度的关键。根据近年来我市汕优63大面积制种实践,去杂工作只要抓住亲本的各生育关键时期,依据株、叶、粒型,借助植株外部特征颜色进行综合判断,便可简单直观地鉴别杂株,提高田间去杂的速度。 1.父本去杂制种田的去杂工作最早是从父本开始,去杂时间一般掌握在分蘖至始穗扬花期之前。 (1)分蘖期父本杂株从移栽后进入旺盛分蘖期起,田间杂株便可辨别。该期杂株外型表现为:株高突出,较正常父本植株高出10厘米以上,发棵
Hybrid rice farming in a timely and thorough to go to work, is to improve seed quality, the key to ensuring the purity of the seed. According to the practice of planting a large area in Shanyou 63 in recent years in our country, going to the miscellaneous and complicated work can seize the crucial period of each birth of the parents and make a simple and intuitive identification based on the strains, leaves and grain types with the help of the external characteristic colors of the plants Miscellaneous strains, improve the speed of the field to miscellaneous. 1. The father to miscellaneous farming farming to go to the earliest work from the paternal start to go to miscellaneous time generally in the tillering to the ear before flowering. (1) tillering parental hybrids from transplanting into the strong tillering stage, the field can be distinguished from other strains. The appearance of hybrids in this period is as follows: the plant height is prominent, more than 10 cm above the normal parent plant,