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一、种植时间及品种选择菜苔属长日照植物,但多数品种对光照长短要求不严格,其生长发育主要受温度的影响,其中种子发芽及幼苗生长的适温25℃—30℃,叶片生长适温20℃—25℃,花薹形成适温15℃—20℃,一般在月平均气温11℃—28℃的条件下都能正常生长,但品种间也不相同。在承德地区,5月初到9月底均适宜种植。5月和9月播种,应选择生长期较长,适应低温的中晚熟品种,如80菜心,60菜心等。而在6月至8月,应选择耐热的早熟品种,如49菜心、15菜心等。
First, the planting time and variety selection Ginkgo is a long-day plants, but most varieties of light requirements are not strict, and its growth and development are mainly affected by temperature, of which seed germination and seedling growth temperature 25 ℃ -30 ℃, leaf growth Suitable temperature 20 ℃ -25 ℃, flower stalks to form suitable temperature 15 ℃ -20 ℃, usually in the monthly average temperature of 11 ℃ -28 ℃ under the conditions of normal growth, but not the same between varieties. In Chengde area, early May to the end of September are suitable for planting. May and September sowing, should choose a longer growing season, to adapt to low-temperature varieties of late-maturing, such as 80 Apricot, Apricot 60 and so on. In June to August, should choose the heat-resistant precocious species, such as 49 Apricot, 15 apricot and so on.