G. YANG1, Q.-S. ZUO1, Y. TANG1, J.-F. SHI1, F.-H. HUI2 and S.-H. LENG1
1 Yangzhou University, Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Ecology and Cultivation in Middle and Lower Reaches of Yangtze River of Ministry of Agriculture, Yangzhou, 225009, China
2 Lixiahe Region Agricultural Research Institute of Jiangsu, Yangzhou, 225007, China
YANG, G., Q.-S. ZUO, Y. TANG, J.-F. SHI, F.-H. HUI and S.-H. LENG, 2010. Phosphorus absorption and utilization of rapeseed (Brassica napus L.) cultivars with different yields. Bulg. J. Agric. Sci., 16: 590-596
By using rapeseed (Brassia napus L.) cultivars with different seed yields, we measured the organ dry weight and phosphorus content, and then used cluster analysis (average linkage method) to classify different cultivars’ yields, and further investigated different cultivars’ phosphorus accumulation and allocation. Our study showed that, different cultivars’ yields have distinct change and can be divided into six types according to clustering dendrogram. Different cultivars’ yields are significantly different. Both phosphorus absorption total volume and phosphorus utilization efficiency for grain production (PUEg) for different types are significantly different. When yield increases, different types’ phosphorus absorption total volume and PUEg values are increased significantly. The accumulation and allocation ratio of phosphorus in seeds from High-yield cultivars are significantly higher than those from low-yield cultivars. The implication is, if we’d like to increase rapeseed’s PUEg, the priority method is to select high PUEg cultivars, and the second choice is to employ appropriate planting strategies so that more phosphorus can be transported to seeds from stems and leafs.