油菜不同类型品种磷效率特性研究

Characteristics of high-efficient phosphorus nutrition among different rapeseed cultivars

在鄂东南有效磷缺乏的红黄壤稻田土壤条件下 ,以我国 15 0 8份油菜品种资源预选核心品为材料 ,研究磷营养水平对不同类型油菜生长发育和产量的影响。试验结果表明 ,低磷条件下不同类型油菜品种苗期植株生长量和籽粒产量差异较大 ,甘蓝型、白菜型和芥菜型油菜分别只有 4 8%、4 3%和 15 %的品种能正常生育获得种籽 ,5 0 %以上的品种于苗期和生长期死亡或不能正常开花结实。施磷处理的油菜能正常生长收获种籽 。

A perliminary core collection of rapeseed germplasm consisting of 1 508 accessions was used in this study to investigate the effects of various phosphorus levels on the development and yield in the south-eastern Hubei province where phosphorus has been generally insufficient in paddy-rice field. The biomass and seed yields showed substantial difference among different rapeseed varieties under low phosphorus stress, and the ratios of accessions in which seeds could be get were only 48%, 43% and 15% in Brassica napus , B. campestris and B.juncea respectively. In the treatment of applying phosphorus, seeds could be harvested in all the genotypes even there was variation in biomass and yield among them.