甘蓝型油菜品种硼利用效率的差异研究

采用土培试验，对硼效率不同的甘蓝型油菜进行两步筛选。（１）苗期筛选：选择１３０个甘蓝型油菜品种，在缺硼和硼正常处理条件下，根据苗期地上部干物重经比（－Ｂ／＋Ｂ）作为硼效率系数，来反映不同品种硼效率差异，初步判断有硼高效品种２２个，硼低效品种２个，硼中效品种１０６个；（２）产量筛选：以Ｂ２（土壤有效硼０．２５ｍｇ／ｋｇ），Ｂ３（土壤有效硼１．０ｍｇ／ｋｇ）水平下油菜种子产量比（Ｂ２／Ｂ３）来反映不同

STUDY ON DIFFERENCES OF BORON USE EFFICIENCY OF RAPE(Brassica n apus L.) CULTIVARS

Under pot culture, twostep screening was taken on different boron efficiency rape (Brassica Napus L.) cultivars as following: (1) seedling screening. One hundred and thirty rape cultivars were selected to culture with boron deficiency and normal boron treatment. Boron efficiency was reflected by boron efficient ratioes which was defined as shoot dry matter ratio of boron deficency and normal boron (-B/+B) in seedling. Under this primary creterium, twenty-two cultivars were boron high efficient,two cultivars were boron low efficient, the others were boron middle efficient. (2) Seed yields screening. Differences were reflected by seed yields ratios of B2 (0.25 mg/kg) and B3(1.00 mg/kg ) treatment. Of the nine cultivars choosed from the resluts of seedling screening, eight in seed yield screening showed the same degree of boron efficiency as the seedling screening which proved that twostep screening (seedling screening and seed yields screening) was reliable in selecting cultivars with different