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1989年6月6日～7日在石家庄召开了东北、华北第六次西甜瓜协作会。参加会议的有黑龙江、吉林、辽宁、山东、山西、河南、河北等省的科研、教学、生产及种子等部门的专家、领导40余人。这次会议的中心议题是西瓜双覆盖早熟栽培。会议期间看了石家庄市双星西瓜研究所的早熟栽培技术录相;参观了该所的早熟品种试验田及生产田;听了该所所长党风信同志关于西瓜育(?)双覆盖与田间双覆盖栽培新技术的发言,这套栽培技术有些突破性的改进,一改浸种催芽为干籽直播,实践
June 6, 1989 ~ 7 held in Shijiazhuang northeast, North China Sixth West Melon Association. Over 40 experts from scientific research, teaching, production and seeds departments of Heilongjiang, Jilin, Liaoning, Shandong, Shanxi, Henan and Hebei provinces participated in the conference. The central topic of this meeting is watermelon double coverage of precocious cultivation. During the meeting saw Shijiazhuang City Shuangxing Watermelon Institute of precocious cultivation technology video; visited the precocious varieties of experimental fields and production fields; heard the director of the Institute of wind letters on watermelon (?) Double coverage and field double Covering the cultivation of new technologies, this set of cultivation techniques have some breakthrough improvements, change the seed soaking for dry seed broadcast, practice