Abstract:

To explore the super high-yield cultivation technology route of winter wheat in the east Henan plain, four semi-winter varieties of three production levels were selected as materials, the analysis of yield structure change, the three components of yield composition and the regression and path were carried out. The results showed that the yield level increased from 9000-9750 kg/hm ² to 9750-10500 kg/hm ², and the planting density, the number of the harvested spikes, grain number per spike and the 1000-grain weight increased in the same pace, and the effective spike number increased greatly. A very significant regression relationship was found among the spike number (x₁), grain number per spike (x₂), 1000-grain weight (x₃) and yield (y). Path analysis showed the contribution to yield listed in descending order of the 1000-grain weight, the number of spikes and the number of kernels per spike. Therefore, special attention should be paid to increasing the 1000-grain weight for the super high-yield cultivation of winter wheat in the east Henan plain, the number of effective panicles should be appropriately increased, and the number of grains per panicle should be stabilized. Therefore, the technical route of “one improvement, three increases, one stability and five prevention” for the super-high-yield cultivation of the semi-winter multi-ear type winter wheat in the east Henan plain was proposed.

Key words: winter wheat, super high yield, regression analysis, path analysis, technical route