阜新县良种场,90%耕地是盐碱地,1979年种210亩向日葵,亩产仅23.6斤.1980年由于对向日葵栽培技术进行“三改”,300亩向日葵平均亩产233.3斤,仅此一项人均收入达200多元.一、改干籽下地为“甜水”(淡水)闷种下地.过去干籽下地后吸收碱水,出“云彩”苗,历年缺苗3～4成,而苗既弱且黄.去年用“甜水”闷种,达到九成苗,并且比不闷种早5天出苗,苗色深绿、茁壮、整齐.闷种后,种子吸水变重,用手点种有利点“活”籽,还可避免“飞”籽. In Fuxin County, 90% of cultivated land is saline-alkali land, with 210 mu of sunflower in 1979 and only 23.6 kg of mu per plant. In 1980, due to the “three changes” to sunflower cultivation techniques, the average output of 300 mu of sunflower was 233.3 kg, Per capita income of more than 200. First, the dry seed to the ground for the “sweet water” (fresh water) bored planting ground in the past dried seed to absorb alkali water, the “cloud” seedlings, over the years lack of seedlings 3 to 4 percent, while the seedlings are weak Last year, with “sweet water” boring species, reaching 90% of the seedlings, and than the boring seedlings as early as 5 days emergence, seedling dark green, robust, neat. “Live” seeds, but also to avoid “flying” seeds.