| A field experiment was conducted to study the effects of planting density and fertilizer application
with straw incorporated on shoot dry matter accumulation and yield of rapeseed in the lower Yangtze region. This
experiment used Deyou 5 as the materials in treatments of no nitrogen fertilizer (CK), farmer爷s practice pattern (FFP)
and three optimized cultivation patterns (OPT1, OPT2 and OPT3). The results showed that the shoot dry matter, N, P
and K accumulation trends were similar in different treatments. With the cultivation patterns optimizing, the more
shoot dry matter, N, P and K accumulation was obtained. The shoot dry matter accumulation and yield in the OPT2
treatment was lower than those in OPT3, however, the seed, N, P, K harvest indices and value to cost ratio increased
significantly. Compared with the FFP treatment, the seed yield and net benefit increased by 73.5% and 2 160
Yuan/hm2 of the OPT2 treatment. The results suggested that shoot growth could be improved, at the same time, high
seed yield, nutrition and value to cost ratio could be achieved through integrating and optimizing cultivation
techniques in the OPT2 treatment. |
