Effects Of Different Sowing Widths And Planting Densities On Dry Matter Distribution, Yield And Quality Of Whea

In order to explore the effects of different sowing widths and planting densities on wheat dry matter accumulation,yield,yield components and quality,and to achieve high-quality,high-yield and efficient production of winter wheat.In this study,Guinong No.19(G19)was used as the test material,and five densities of 75plants/m2(D75),150 plants/m2(D150),225 plants/m2(D225),300 plants/m2(D300),375 plants/m2(D375)and three different sowing widths:Line and density of 33.3 cm row spacing(LDS);Belt uniform sowing with wide width of 20 cm,20cm row spacing(BUW);Belt non-uniform sowing with a width of 25 cm and a row spacing of 15 cm(BUN);by measuring the dry matter accumulation,yield components,quality elements and other indicators,the effects of different sowing widths and planting densities on the dry matter of wheat were analyzed.Effects of accumulation distribution,yield and yield composition,and nutritional quality.The results of the study are as follows:(1)Between D75 and D375 treatments,with the increase of seeding density,yield increased(32.9%,33.7%,17.3%,10.5%),and aboveground biomass increased(36.7%,26.4%,23.0%,5.3%),dry weight of ear increased(36.0%,27.1%,22.0%,4.3%),the increase gradually decreased,and the trend was flat.BUW and BUN treatments significantly increased yield(51.0%,45.3%),shoot biomass(53.5%,44.3%),and ear dry weight(55.3%,46.4%)compared with LDS treatments.No significant difference.(2)Between D75 and D375 treatments,with the increase of planting density,the number of spikes per unit area of wheat increased(35.8%,30.6%,30.0%,9.4%),and the total 1000-grain weight decreased.There was no difference in the number of grains per spike of wheat;BUW and Compared with LDS treatment,BUN treatment significantly increased the number of panicles per unit area(32.6%,33.4%),the1000-grain weight remained unchanged or decreased,and the number of grains per panicle increased(14.3%,13.2%).The contents of potassium,calcium,iron and zinc in the grains were not significantly different,and had no significant effect on the accumulation of nutrient elements in the grains.(3)BUW and BUN treatments increased yield by regulating the distribution of dry matter in leaves and stems to ears.There was a significant positive correlation between grain yield and aboveground biomass(R~2=0.94),a significant positive correlation between the number of panicles per unit area and grain yield(R~2=0.66),and a positive correlation between grain yield and the number of grains per panicle(R~2=0.25).HI and 1000-grain weight were not correlated with grain yield.There was no correlation between the grain yield and the contents of potassium,calcium,iron and zinc under different seeding width and planting densities.