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甜研八号是以ＫＨ为骨干系，与４个自交系按４∶１（自交系等量）配制的多系自然杂交组合（代号ＫＨ－５），生产上利用一代杂交种。１９９１～１９９５年参加全国１３个网点区域试验和４个点两年（１９９４～１９９５年）的生产试验，平均根产量为４２６３８．６ｋｇ／ｈｍ２和４３７８２．０ｋｇ／ｈｍ２，前者比对照增产９．０％，后者与对照持平（－０．１％），平均含糖率为１６．６％和１６．１％，比对照提高１．３２度和１．３５度，平均产糖量为７１０１．９ｋｇ／ｈｍ２和７００３．７ｋｇ／ｈｍ２，比对照增产２２．９％和９．５％；１９９３～１９９７年参加黑龙江省１０个点区域试验和６个点两年（１９９６～１９９７年）的生产试验，平均根产量、含糖率和产糖量分别比对照提高１０．２％和２７．８％、０．８度和０．６４度、１８．５％和３４．９％。抗褐斑病和根腐病，较对照低０．８级，根腐病罹病率５．５％，亦较耐立枯病和丛根病。适宜在黑龙江省的佳木斯、齐齐哈尔、哈尔滨、大庆，内蒙古的中部、东部，宁夏的银川，甘肃的黄羊镇，新疆的石河子、和静等地种植。
Sweet Research No. 8 is a multi-line natural hybrid combination (code KH-5) with KH as its main line and 4 inbred lines as 4: 1 (the same amount of inbred lines), and one generation of hybrids is used in production. From 1991 to 1995, he took part in the regional experiment of 13 outlets and the production test of 4 years and 2 years (1994-1995) with the average root yield of 42638.6kg / hm2 and 43782.0kg / hm2, the former increased 9.0% %, The latter is flat with the control (-0.1%), the average sugar content was 16.6% and 16.1%, 1.32 degrees and 1.35 degrees higher than the control, the average sugar yield was 7101. 9kg / hm2 and 7003.7kg / hm2, 22.9% and 9.5% more than that of the control respectively. From 1993 to 1997, they took part in the production test of 10 spots in Heilongjiang Province and the production of 6 years and two years (1996-1997) , The average root yield, sugar content and sugar yield increased by 10.2% and 27.8%, 0.8 and 0.64, 18.5 and 34.9% respectively over the control. Resistance to brown leaf spot and root rot, 0.8 grade lower than that of the control, root rot incidence rate of 5.5%, also more resistant to blight and rhizomania. It is suitable for planting in Jiamusi, Qiqihar, Harbin, Daqing, Heilongjiang Province, central and eastern Inner Mongolia, Yinchuan in Ningxia, Huangyang in Gansu, Shihezi in Xinjiang and Hejing.