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不同播期对淮麦33生长发育及产量的影响

Effects of Different Sowing Dates on Growth Development and Yield of Huaimai 33

  • 摘要: 为促进淮北地区小麦生产,进一步探究本地区小麦的播种适期,江苏(新沂)现代农业(稻麦)科技综合示范基地于2021-2022年选用淮北地区大面积推广的淮麦33为试验品种,进行了不同播期的试验,播期设置为10月5日、10月15日、10月25日、11月5日和11月15日。结果表明,播期能显著影响小麦生育进程,随着播期的推迟,出苗期、拔节期、抽穗期依次延后,但是成熟期差异不大,小麦全生育期缩短。播期越晚,主茎叶龄越小,单株分蘖数、总茎蘖数、大于3.1叶的大分蘖数、大于4.1叶的大分蘖数和单株次生根越少。穗数、穗粒数、千粒重、实际产量均随着播期的推迟先增大后减小。

     

    Abstract: In order to promote wheat production in Huaibei, and further explore the suitable sowing date of wheat in this area, Jiangsu(Xinyi) Modern Agriculture(Rice and Wheat) Science and Technology Comprehensive Demonstration Base conducted the experiments with different sowing dates from 2021 to 2022. Huaimai 33, which was widely promoted in Huaibei Area, was selected as the experimental variety, and the sowing dates were October 5, October 15, October 25, November 5, and November 15. The results showed that sowing date significantly affected the growth process of wheat. With the postponement of sowing date, the emergence stage, jointing stage and heading stage were postponed in turn, but the difference in maturity stage was not significant, and the whole growth period of wheat was shortened. The later the sowing date was, the smaller the leaf age of the main stem would be, and the fewer the total tillers per hectare, the number of tillers per plant, the number of large tillers with more than 3.1 leaves per hectare, the number of large tillers greater than 4.1 leaves per hectare, and yhe number of secondary roots per plant would be. The number of panicles per hectare, the number of grains per panicle, the 1 000 grain weight, and the actual yield all increased first and then decreased with the delay of sowing date.

     

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