小麦生产成本是评价小麦生产比较优势的综合性技术经济指标,江苏省六个麦区和七个农场近五年的实证研究表明,小麦生产在麦区间和年度间发展不平衡,风险发生率较高,同时存在明显的规模经济效应,因此调整区域布局、优化投入结构、加强风险预测、扩大种植规模是提高江苏省小麦生产经济效益的有效途径.

The technology of bunch planting with platstic film in late-sown wheat improved the accumulated temperture, preserved the soil moisture during the earlier stage?made wheat emergence earlier, and accelerated the speed of leaf emergence. Compared with the drilling planting without plastic film, the number of main stems and tillers were increased and decreased sharply, the LAI was high in the former stage and low in the later stage, the accumulated dry matter was high in the former stage and low in the later stage, the grain filling intensity was high in the former stage and low in the later stage, the amount of N uptake was high in the former stage and low in the later stage, the content of chlorophyll and intensity of photosynthetic were low after anthesis, the potential of grain yield was high; the content of protein, wet gluten, development time, stability time, valorimeter value of grain and dough were decreased. In the high benefit planting pattern area of Huaibei of Jiangsu, the technology of bunch planting with plastic film could be adopted by paying attention to suit measures to local conditions, in the rainy area of Huainan of Jiangsu wheat planting with plastic film had defects which were difficult to get higher yield, better quality and greater effective, so we should cautiously popularize and apply it.