Study on high-yielding cultivation model for Brassica Napus L

摘要

By adopting the design of orthogonal rotation combination, study on the best combination of planting density, sowing date, nitrogen, phosphorous, and variety for high-yielding cultivation model of Brassica Napus L. was conducted under field grown condition. The result showed: 1. Sowing date, nitrogen, phosphorous and the interaction of sowing date and planting density impacted the yield significantly. 2. Rapeseed yield would decrease as the postponing of sowing date and rise as the increasing of nitrogen application amount. 3. The yield would be the highest at early sowing with low planting density, but the lowest either at late sowing with low planting density or early sowing with high density. 4. The best combination for achieving the yield of over 3000kg/hm2 varied from varieties.