早中熟籽粒直收耐旱玉米新品种新玉108号产量潜力与相关农艺性状分析

Analysis on Yield Potential and Related Agronomic Characters of New Maize Grain Mechine Harvesting Variety Xinyu 108 with Drought Tolerance

【目的】分析早中熟玉米籽粒直收新品种新玉108号的产量潜力、耐旱性和适应性,为新品种推广提供科学依据。【方法】收集新疆北疆早中熟春播玉米区域试验、生产试验和多点试验结果量化数据,采用作物品种区域试验统计分析系统RCT99软件进行统计分析。【结果】新玉108号两年区试平均产量953.5kg/666.7m2,比对照登海3672增产5.89%,增产点率89%。生产试验产量907kg/667m2,比对照增产2.97%,增产点率80%。平均机收产量1103.4kg/667m2,高产田产量1327kg/667m2。平均生育期120.1d,较对照早熟0.45d,所需≥10℃有效积温2500℃。籽粒容重782g/L,粗蛋白9.6%,粗脂肪3.5%,粗淀粉75.49%。倒伏倒折率1.2%,收获含水量24.9%,机收籽粒破损率3.78%,落穗率0,落粒率0.7%,产量损失率0.7%。耐旱指数0.95,属强耐性级别,与先玉335相同,较郑单958高两个耐旱等级。耐密性较好,耐密系数为1.12。【结论】新玉108号产量高,增产潜力大,稳产性好,品质优良,脱水快,抗倒伏,耐密植,耐旱性强,抗玉米黑粉病、丝黑穗病和青枯病,适宜机械收粒。

【Objective】 To analyze the yield potential and adaptability of Xinyu108, a new direct - harvesting maize hybrid with early-mid maturity, and to provide a scientific basis for its extension.【Method】 Based on the regional test, production test and multi-point test results of early-mid maturity spring maize sown in northern Xinjiang, RCT99 software was used for statistical analysis.【Result】 The average yield of the two-year regional trial was 953. 5 kg / 667m^2 , 5. 89% higher than that of the control Denghai 3672. The rate of increasing production point was 89%. The yield of production test was 907 kg / 667 m 2 , which increased by 2.97% compared with the control. The rate of increasing production point was 80%. The average output was 1,103.4 kg/667m^2, and the high-yield field production reached to 1,327 kg/667 m 2.The average growth period was 120. 1 days, 0. 45 days earlier than that of the control, and the effective accumulated temperature needed was 2, 500℃(≥10℃). Grain bulk density was 782 g/L, crude protein 9. 6%, crude fat 3. 5%, and crude starch 75. 49%. The lodging and breakage rate was 1. 2%, the moisture content was 23. 7%, the damage rate of machine-harvested grains was 3. 78%, the ear-drop rate was 0, the grain - drop rate was 0.7%, and the yield loss rate was 0. 7%. The drought tolerance index is 0.95, which ranked strong tolerance level as same as Xianyu 335 and has two grades of drought tolerance than Zhengdan 958. The density is good with density index of 1.12.【Conclusion】 Xinyu108 has high yield, good stability, good quality, fast dehydration, lodging resistance, resistance to maize smut, head smut and stem rot, and is suitable for mechanical harvesting.