今年为了超额完成麻类作物生产的过关任务,河北、山东及河南三省都由浙江及广东地区引进大量黄麻种子,在北方扩大黄麻栽培面积。黄麻为短日照作物,习惯于南方短日照条件的黄麻品种种子,移往北方地区种植,由于夏季的长日照条件,大多表现为不着蕾开花,或花而不实,或结籽很少,营养生长期延长,麻 This year, in order to surpass the task of translating the production of hemp crops, a large number of jute seeds were introduced from Zhejiang and Guangdong provinces in Hebei, Shandong and Henan provinces, and jute cultivation areas were expanded in the north. Jute is short-day crops, jute seeds that are accustomed to the short-day conditions in the south, and moved to the northern region for planting. Due to the long sunshine conditions in summer, most jaundice shows no flowering or flowering, Growing period, hemp