几年来,我们在山东繁殖白菜籽,其技术措施如下: 1.适时早播。一般在9月中、下旬开始播种育苗,采用畦播。为了使苗床密度均匀,可在种子中掺一些细砂撒播。山东这时期一般雨水较少,因此,要保证苗期水分的供给。 2.及时起苗。白菜苗长到20片叶左右时,一般在11月中旬(小雪前)即可起苗,起苗前进行一 In recent years, we breed cabbage seeds in Shandong, the technical measures are as follows: 1 timely sowing. Generally in mid-September, late seeding seedlings, the use of broadcast. In order to make the density of seedbed evenly, you can mix some fine sand in the seed. Shandong generally less rainfall during this period, therefore, to ensure the supply of seedling water. 2. Timely seedlings. Cabbage seedlings grow to about 20 leaves, usually in mid-November (before snow) can be from the seedlings before the start of a