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杂交高梁的保苗问题,有些地区仍没有解决好。例如,我县1973年播种55万亩杂交高粱,其中有2.5万亩保苗不好,有7,000多亩进行了毁种。影响杂交高粱保苗的因素很多。对此,我们做了以下几个方面的试验和调查。(一)不同品种与保苗的关系:在相同播种条件下,不同品种出苗率并不同。试验表明,杂交高粱的出苗率低于普通高粱。“晋杂5号”的发芽率为93.7%,“9—2”为96.2%,二者只差2.5%,而田间出苗率却相差18.3%。主要原因是
Hybrid sorghum seedlings, some areas still not solved. For example, my county sowed 55 million mu of hybrid sorghum in 1973, of which 25,000 mu were poorly protected and 7,000 mu were destroyed. There are many factors that affect the seedling protection of hybrid sorghum. In this regard, we have done the following aspects of the test and investigation. (A) the relationship between different varieties and seedlings: In the same sowing conditions, different varieties of different emergence rates. Experiments show that hybrid sorghum emergence rate is lower than ordinary sorghum. The germination rate of Jinza 5 was 93.7% and that of 9-2 was 96.2%, both of which were only 2.5% less than those of the other two plants, while the germination rate in the field was 18.3%. The main reason is