[关键词]
[摘要]
以玉米新品种京农科828(国审玉20190009)为研究材料,在京津冀地区22个百亩方开展机械粒收质量性状研究,为该品种示范推广和子粒机收提供技术支持。结果表明,京农科828在京津冀区6月1~20日夏播,9月21日至10月12日正常成熟,出苗-成熟平均为107 d。生理成熟后9~15 d机械粒收,平均子粒含水率为25.5%;子粒破碎率、杂质率和落粒率分别平均为4.3%、2.0%和3.5%。各试点机收子粒产量均达10 000 kg/hm2以上,平均为10 559.8 kg/hm2,最高为11 373.0 kg/hm2。相关分析表明,机收子粒产量与落粒率极显著负相关(r=-0.61**,n=22),子粒含水率与破碎率和落粒率极显著正相关(r=0.80**和r=0.57**,n=22)、与杂质率显著正相关(r=0.45*,n=22),子粒含水率和落粒率是影响京农科828机械粒收质量和机收产量的主要因素。
[Key word]
[Abstract]
In this experiment, Jingnongke828 (National registration 20190009) was used as the research material. Research on the mechanical grain yield quality of Jingnongke828 was carried out in Jing-Jin-Ji area, to provide technical support for the demonstration and promotion of the variety. The results showed that, Jingnongke828 was able to reach physiological maturity normally from September 21 to October 12 from June 1 to 20. The average growth period of Jingnongke828 was 107 d. The average moisture content of Jingnongke828 is 25.5% at 9-15 d after physiological maturity; the average broken rate, average impurity rate and grain loss rate of Jingnongke828 is 4.3%, 2.0% and 3.5%. The average yield of Jingnongke828 was 10 559.8 kg/ha, and the highest yield is 11 373.0 kg/ha at the Beili village, Dongshiduan, Xushui county, Hebei province. The yield of Jingnongke828 was negatively correlated with the field loss rate(r=-0.61**, n=22). There was a very significant positive correlation between the moisture content and the percentage of broken grains(r=0.80**, n=22), and a significant positive correlation between the moisture content and the percentage of impurities(r=0.45*, n=22), which indicated that the moisture content of grains was the main factor affecting the mechanical grain yield quality of maize.
[中图分类号]
S513.091
[基金项目]
国家重点研发计划项目(2017YFD0101202)、北京市农林科学院科技创新能力建设专项(KJCX20170708)、北京市农林科学院青年科研基金(QNJJ201728)、现代农业产业技术体系专项资金(CARS-02-11)、北京市农林科学院院级科技创新团队建设项目(JNKYT201603)资助