Optimization of Sowing Date,Seeding Rate and Fertilizer Management for High and Stable Yield of Yanmai No.1:A Case Study Based on Three-year Locational Experiments
Guo Hong
Wang Min
Dai Lingyun
Jia Yuping
Abstract：To clarify the synergistic regulatory effects of sowing date,seeding rate and fertilizer management on population structure,yield formation and yield stability of Yanmai No.1 and screen out the high and stable yield cultivation model suitable for this variety in this region,wheat variety Yanmai No.1 was taken as the test material,and consecutive three-year locational experiments were carried out from 2021 to 2023 at the Jiangsu(Yandu)Modern Agriculture(Rice-Wheat)Science and Technology Comprehensive Demonstration Base.Five treatments were designed in the experiment.The results showed that treatments T2 and T3 exhibited the optimal population quality,with simultaneous improvements in effective panicle number,grains per panicle and thousand-grain weight.Their average yields over the three years were 537.17 kg per 667 m2 and 541.08 kg per 667 m2,respectively,which were significantly higher than those of other treatments.Stability analysis revealed that T3 had the lowest yield coefficient of variation,demonstrating good yield stability.This study indicated that the synergistic regulation strategy,including suitable sowing date(November 6-12),moderate seeding rate(150-180 kg/hm2),and delayed nitrogen application(the proportion of jointing fertilizer≥30%),could coordinate the relationship between the population structure and yield formation and achieve high and stable yield of Yanmai No.1 in Yancheng area,providing theoretical basis and technical support for the green and efficient cultivation of wheat in Yandu.
Keywords：Yanmai No.1Sowing dateSeeding rateFertilizer managementStability
Publication Date：2026-02-28
Online Publishing Date：2026-03-26(First online date of this platform, not the publication date of the document)
Pages：6( 20-25 )