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1980-1982年,我们对高粱种子发芽率降低的原因和防止措施进行了试验和探讨。一、发芽率降低的原因 1.低温冻害对发芽的影响忻县高粱制种田于10月上旬即可收获完毕,一般不存在收获前冻害。收获后冻害有没有?我们在霜冻来临前,从制种田中选3197A不同成熟度的穗子,保持原有水分。根据气象预告,温度每下降一次,将不同水分的穗子,放于室外地面进行低温处理,并测地面最低温度。处理后脱粒,测含水量,进行发芽试验。结果表明:高粱种子含水量在14-20％之间,从轻霜冻到极严重霜冻(-14.5℃),发芽率均能达到标准;含水量在21-30％之间,温度在
In 1980-1982, we tested and discussed the reasons for reducing the germination rate of sorghum seeds and the prevention measures. First, the germination rate decreased 1. Low-temperature frost damage on the germination Xinxian sorghum farming in early October can be harvested is completed, there is generally no pre-harvest frost damage. Frozen harvested after harvest? We frost before the election, from the system of farming selected 3197A different maturity of the ears, to maintain the original moisture. According to the meteorological forecast, the temperature dropped once, the ear of different moisture, placed outside the ground for low temperature treatment, and measured the lowest temperature on the ground. Threshing after treatment, measuring water content, germination test. The results showed that the moisture content of sorghum seeds was between 14-20%, and the germination rate could reach the standard from light frost to very severe frost (-14.5 ℃). The water content was between 21-30%