Search

In order to recommend fertilizer application for different rapeseed, the most popular 34 cultivars from Yangtze River area were planted in field at Shayang, Hubei province, with the same fertilization level (N210kg/hm2P2O5 45kg/hm2K2O 67. 5kg/hm2). The materials were divided into 4 types according to their nitrogen uptake and efficiency. Type A cultivars had both high uptake and utilization efficiency, type B had low uptake but high utilization efficiency, type C had high uptake but low utilization efficiency, and type D had both low uptake and utilization efficiency. Their agronomic traits, dry matter accumulation and N accumulation were investigated. Results showed that type A had strong advantage on inflorescence length, pods on main inflorescence, first branch number and pods of first branches. The higher the nitrogen uptake efficiency, the more dry matter and nitrogen accumulated. The accumulated quantity of dry mass and nitrogen was shown as C (and A) > D (and B). More dry matter and nitrogen were distributed into seeds and less into seed coats in high nitrogen utilization efficiency type A and B. The seed yield and seed nitrogen accumulation were shown as A > B (and C) > D. [ABSTRACT FROM AUTHOR]