论文部分内容阅读
近几年来,随着全县玉来杂交种的推广,粮食产量稳步增长,在进一步扩大玉米杂交化中,迫切需要解决玉米自交系和杂交制种田产量低的问题。全县平均玉米制种田亩产只有一百斤左右,有的只有几十斤。为什么这样低呢?据调查,重要的原因是保苗不足。而缺苗的主要原因又是防治地老虎不及时。因此在加强植保工作的同时,合理确定父母本种植行的比例和密度,是提高玉米制种田产量的重要途径。为此,我们做了如下试验。
In recent years, with the popularization of Yulian hybrids throughout the county, grain output has been steadily increasing. In further expanding maize hybridization, there is an urgent need to solve the problem of low yield of maize inbred lines and hybrids. The average yield per acre corn farming only about one hundred jin, and some only a few pounds. Why is it so low? According to the survey, the important reason is insufficient seedlings. The main reason for the lack of seedlings is to control the tiger is not timely. Therefore, strengthening the plant protection work at the same time, a reasonable parents to determine the proportion of planting lines and density, is an important way to improve maize farming output. To this end, we did the following experiment.