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甘薯优良品种的混杂是生产上早就注意的问題。1954年曾在定县韓家窪一帶調查了几块甘薯田,发现胜利百号品种混种着护国、細皮白等品种的單株达40—60％之多。1956年在辽宁省的兴城調查,該品种混杂的种类更多。这种混杂現象如不早日設法防止,势將由于对选种重视不够,而更加严重起来,以致影响产量。目前生产上推广最多的品种如胜利百号、华北166,宁远30日,这些品种的混杂情况都是十分严重的。現將我們在各地了解的混杂情况,按品种特征、混杂率及防止方法分别說明如下: 一.胜利百号:本品种是我国生产上最主要的品种,原种特征为蔓短而粗,多年来由于該品种混杂
The promiscuity of sweet potato varieties is a long time ago in the production. In 1954, a few sweet potato fields were investigated in Hanjiawa, Dingxian County. It was found that the varieties of Shengli No. 100 were mixed with as many as 40-60% of the individual plants of Huo Guo and Xi Pei. In 1956 in Xingcheng City, Liaoning Province, the variety of species mixed more. If this confounding phenomenon is not managed at an early date, the situation will be more serious due to insufficient attention to the selection of seeds and will affect the output. At present, the varieties most widely promoted in production are Victory No. 100, North China 166 and Ningyuan 30, and the mixture of these varieties is very serious. Now we understand the mixed situation around, according to the characteristics of varieties, mixed rate and prevention methods are described as follows: 1. Victory Hundred: This species is the most important species in China’s production, the original species is short and thick vine, for many years Come because of the variety mixed