一九七五年我县参加河南省农林科学院组织的全省棉花杂交种品系比较试验,承担了108个品种比较试验。通过田间观察和室内考种,从中评选出“79”、“77”、“90”等三个优良品种,单产皮棉都在200斤以上,比推广种岱字16号增产,而且质量显著提高,衣分比岱字16号提高5%左右,绒长提高1—2个长度,品级提高1—2个等级。总的来说,这三个品种,经济性状都比较好,但是种子数量少,当年每个品种只有30棵,三个品种共收六斤种子。按照老办法播种,每亩下种量需要十几斤,六斤种子只能种半亩地。为了加速繁殖,我们采取了“稀植大棵,快速繁种”的新方法。具体要求:四两种子种一亩,实行育苗移栽,一钵一种,每亩千株。按照这个办法,一九七六年我们将六斤种子分到九个条件较好的生产队和科研站种植,并固定了专人管理,比较 In 1975, the county participated in the comparative experiment of the cotton hybrid strains across the province organized by Henan Academy of Agriculture and Forestry, undertaking comparative trials of 108 varieties. Through field observation and indoor test, three excellent varieties of “79”, “77” and “90” were selected and their lint yield was above 200 kg, which was higher than the promotion of Dai Dai Zi No.16, and the quality was significantly improved. Dai Dai word than clothing on the 16th increase of about 5%, velvet length increased 1-2, grade level 1-2. Overall, these three varieties have better economic traits, but with fewer seeds, with only 30 in each year and a total of 6 kg of seeds in three varieties. Sown according to the old method, the amount per acre need more than ten pounds, six pounds of seeds can only grow half mu of land. In order to speed up breeding, we have adopted a new method of “planting large trees and rapidly breeding them.” Specific requirements: Four or two seeds of a acre, the implementation of transplanting seedlings, a bowl, a thousand per acre. According to this measure, in 1986 we allocated six kilos of seeds to nine well-established production teams and research stations for planting and fixed staffing and comparison