小麦宽幅精播技术增产效应的研究进展OA

This paper systematically reviewed and analyzed the characteristics of wheat wide-precision sowing technology and its impacts on wheat growth and yield.As a high yield sowing technology centered on expanding sowing width and increasing row spacing(the planting row spacing was increased to 22-25 cm and the sowing width was expanded to 8-10 cm),it adopted the method of dispersed grain sowing(with a seeding rate of 112.5 kg/hm²).This technology enabled precise and uniform sowing of wheat seeds as well as one-time soil compaction operation,while reducing production costs.The specific effects of this technology on wheat growth and yield were as follows:under this technical mode,wheat seedlings emerged evenly with consistent growth,which improved seed survival rate and seedling emergence rate;it effectively optimized the ventilation and light transmission conditions among wheat plants,and the above-ground and below-ground indexes of wheat,such as tiller number,heading rate,root length density and root weight density,were all higher than those under conventional sowing;it fully utilized light resources,improved the utilization efficiency of water and fertilizers,and realized the efficient utilization of environmental resources;it significantly increased yield-related indexes including grain weight per spike and 1 000-grain weight of wheat,thus achieving the goal of high yield.This paper aims to provide a reference for the further popularization and application of wide-precision sowing technology for wheat by integrating existing research findings.