7804是中国农科院麻类研究所以莱阳红麻为母本、71—4为父本杂交选育成的南方中熟品种。在长江流域种植可收到种子,生育期190天。北方种植主要是生长营养体,仅有极少部分植株现蕾开花,但收不到种子。在辽宁种植一般不能结籽,若想获得种子必须进行短日照处理。 7804 is the Chinese Academy of Agricultural Sciences Institute of Hemp Laiyang kena as the female parent, 71-4 as the male parent breeding bred into the southern variety. Planting seeds in the Yangtze River Basin, the growth period of 190 days. Northern cultivation is mainly vegetative growth, only a very small part of the plants budding flowering, but can not receive the seeds. Generally can not be planted in Liaoning seed, if you want to get the seeds must be short-day treatment.