2.A causal diagnosis is conducted on the yellows of Machilus thunbergii by means of the soil-plant chemical analysis, enzyme diagnosis, and field experiments, which grow in the saline-alkali soil at Zhujiajian Nursery Stock Base.
4.Herbicide, chlorimuron-ethyl, was applied in the field in 2001, both of the growth vigour and the root yield of the sugar beet were investigated in 2003, by which paper tube nursery and direct seeding.
5.Seedlings were plan-ted in mixed medium as transitional nursery bed with clean environment, rational watering, light and temperature, 40 days later, they could be transplanted in field.
采用蛭石（6）、珍珠岩（3）、泥炭（1）混合基质作移栽过渡苗床，注意保持环境清洁，控制合理的水分、光照、温度，可以达到较高成活率，苗床过渡 40 d 即可移入大田栽培。收藏指正
