石家庄市夏玉米种质优选与施肥协同研究OA

In order to screen out suitable summer maize varieties and the best fertilization techniques for the Shijiazhuang area,20 main and newly approved summer maize varieties in the Huanghuaihai region were used as materials,Four fertilization treatments were set:T1(conventional fertilization),T2(split topdressing of nitrogen fertilizer),T3(20%nitrogen reduction+biochar),and T4(40%nitrogen reduction+biochar).A randomized block design with 3 replications was adopted,and agronomic,yield,and quality traits were determined.The results showed that treatment T3 achieved the optimal effect in both producing areas.In the eastern plain area,compared with T1,the agronomic traits of T3 increased by 0.88%～4.57%,the yield reached 10410.65 kg·hm-2(an increase of 11.66%);In the western hilly area,the agronomic traits of T3 increased by 0.89～4.00%compared with T1,the yield reached 9821.40 kg·hm-2(an increase of 17.67%).Among the varieties,Nongda 372(11392.83 kg·hm-2)and Shiyu 15(11343.08 kg·hm-2)had high yield and good quality in the eastern plain area.In the western hilly area,Nongda372(10457.83 kg·hm-2)had the highest yield,followed by Shiyu 191 and Shiyu 15.Treatment T2 also significantly increased yield and improved quality,while the effect of T4 was inferior to T3.