怎样提高秋栽洋葱的定植质量据各地实践经验证明，秋栽的洋葱要比春栽的产量高、品质好。但由于受南北气候差异较大的限制，因而各地定植期也不相同，在长城以北地区，冬季严寒，以春栽为主。山东、河南、冀中南、晋南、陕南及以南地区都可进行秋栽。两者之间地带多行春栽... How to improve the quality of autumn planting planted onions According to practical experience throughout the country, autumn planting planted in spring than the high yield, good quality. However, due to the large difference between the north and south climatic constraints, so the planting period is not the same throughout the Great Wall north of the region, the winter cold, mainly in spring planting. Shandong, Henan, Jizhongnan, Jinnan, southern Shaanxi and southern regions can be planted autumn. Between the two lines spring planting ...