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[目的]研究在最佳播期条件下的最佳播种量,以期为制定有利于发展冬小麦生产的栽培措施提供理论依据。[方法]以泰农18及济麦22为试验材料,通过不同播量播种来研究不同播期对冬小麦产量及产量构成因素的影响。[结果]随着播种量的增加,泰农18子粒产量降低,即小播量(R1)子粒产量达到最大值;随着播种量增加,济麦22子粒产量先升高后降低,中播量(R2)达到子粒产量最大值。随着播种量增加,泰农18及济麦22小麦穗数逐渐增加,大播量(R3)达到穗数最大值。随着播种量增加,泰农18及济麦22小麦穗粒数及及子粒千粒重逐渐减小,小播量(R1)达到穗粒数及子粒千粒重最大值。[结论]随着播种量增加,2个品种小麦穗粒数及子粒千粒重逐渐减小,即小播种量达到穗粒数及千粒重的最大值;随播种量增加,2个品种小麦穗数逐渐增加,大播量达到穗数最大值。
[Objective] The research aimed to study the optimum sowing rate under the best sowing date, in order to provide a theoretical basis for making cultivation measures that are beneficial to the development of winter wheat production. [Method] With TaiNan 18 and Jimai 22 as test materials, the effects of different sowing dates on the yield and yield components of winter wheat were studied by sowing at different sowing rates. [Result] With the increase of seeding rate, the grain yield of Tainong 18 decreased, that is, the seed yield of R1 reached the maximum. With the increase of seeding rate, the grain yield of Jimai 22 increased at first and then decreased, (R2) reaches the maximum grain yield. With the increase of seeding rate, the spikes of TaiNong 18 and Jimai 22 increased gradually, and the number of spikes (R3) reached the maximum of spikes. With the increase of seeding rate, the number of spikelets per thousand of wheat and the grain weight per thousand of Tainong 18 and Jimai 22 decreased gradually. The boll number (R1) reached the maximum of grain number per spike and grain weight per 1000. [Conclusion] With the increase of seeding rate, the grains per spike and the 1000-grain weight of two wheat varieties decreased gradually, that is, the sowing rate reached the maximum of spike grain number and thousand-grain weight. With the increase of sowing rate, the spikelets number of two wheat varieties increased , Seeding reached the maximum spike number.