黄淮海地区玉米辣椒间套作模式中的玉米适宜播期选择OA

[Objective]This study was conducted to explore the effects of the suitable sowing date of maize on the yield and economic benefits of the intercropping pattern of maize and pepper in order to lay the foundation for enriching annual multiple cropping patterns and promoting yield increases and income growth in Huanghuaihai Region.[Method]Maize'MY73'and pepper'Jiaoyu 18'were employed as experimental materials.Three treatments were established for the maize sowing date,namely T1(May 5th),T2(May 24th),and T3(June 4th),to investigate the effects of different maize sowing dates on the photosynthetic capacity,dry matter mass,yield of maize and the growth indica-tors,dry matter mass,yield of pepper,and annual economic benefits of both crops.[Result]The dry matter mass and yield of maize increased with the delay of the maize sowing date.Among them,the yield of T3 treatment was increased by 13.71%and 9.68%compared with T1 and T2,respectively.The dry matter mass and yield of pepper of T1 were the highest,the yield of T2 treatment was signifi-cantly lower than that of T1 and T3 by 67.20%and 61.00%,respectively.Thus,the annual economic benefit of T2 was the lowest,while that of T3 was the highest because the high yields of pepper and maize,which were increased by 15.29%and 126.78%compared with T1 and T2,respectively.[Con-clusion]The sowing date of maize influences the annual economic benefits significantly by affecting the yields of wheat,maize,and pepper.The analysis of yield data and annual economic benefits indicate that planting maize during the first ten days of June after wheat harvest is more advantageous for increa-sing both production and income in the intercropping system of maize and pepper,which also facilitates the development and optimization of annual multiple cropping patterns in Huanghuaihai Region.