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[目的]为探索山西省中部地区夏高粱-冬小麦一年两熟种植制度下,不同麦秆还田量对夏高粱生长发育及产量的影响。[方法]本试验采用单因素随机区组设计,研究了麦秆不还田(CK)、50%麦秆还田(HR)和100%麦秆还田(WR)3种麦秆还田量对夏高粱农艺性状及产量构成的影响。[结果]相比CK处理,秸秆还田处理显著影响了夏高粱的株高、叶面积指数及产量构成因素。其中,夏高粱的株高和叶面积指数在HR处理下显著增加,较CK处理分别增加了16.82%和11.45%;穗长、穗数和穗粒数等性状较CK处理增加了5.13%、11.01%和2.86%。此外,HR处理下的夏高粱产量最高,较CK和WR处理增产8.44%和20.41%。[结论]50%麦秆还田量有效地增加了夏高粱的叶面积指数、穗长、穗数和穗粒数,从而表现出显著增产的优势,适宜在我省中部地区推广。
[Objective] The purpose was to explore the effect of returning wheat straw to field on the growth and yield of summer sorghum under the system of two-year summer sorghum-winter wheat planting in central Shanxi. [Method] The single factor randomized block design was used in this experiment to study the effects of returning straw without straw (CK), straw returning with 50% straw (HR) and straw returning with 100% straw (WR) Effects of Agronomic Characters and Yield Components of Summer Sorghum. [Result] Compared with CK treatment, straw returning significantly affected the plant height, leaf area index and yield components of summer sorghum. Among them, the sorghum plant height and leaf area index increased significantly under HR treatment, increased by 16.82% and 11.45% respectively compared with CK treatment; The characters of spike length, spike number and grains per spike increased by 5.13%, 11.01 % And 2.86%. In addition, the summer sorghum yield under HR treatment was the highest, 8.44% and 20.41% more than that of CK and WR treatments. [Conclusion] 50% straw returning effectively increased the leaf area index, spike length, spikes and grains per spike of summer sorghum, which showed the advantage of significant yield increase and was suitable for popularization in the central region of our province.