小麦花后粒茎质量变化研究

[目的]了解小麦花后单茎、籽粒、茎秆质量变化规律。[方法]以平安7号、郯麦98、豫农202和淮麦20为供试品种,花后每3 d测定1次干物质量,建立数学模型,分析小麦花后单茎、籽粒、茎秆质量变化规律。[结果]单茎质量呈＂快—慢＂的变化趋势,籽粒质量呈＂慢—快—慢＂的变化趋势,茎秆质量先增后减。单茎、籽粒和千粒质量变化过程为Logistic生长曲线;茎秆质量变化为抛物线;单茎日增量呈直线减少趋势;籽粒、茎秆日增量变化趋势为抛物线。[结论]该研究为小麦高产栽培提供了理论参考。

Research on the Grain and Stem Quality of Wheat after Its Flowering

[Objective] To find out the variation rules of the single stem,grain and stalk weight of wheat after its flowering.[Method] With Ping'an No.7,Tanmai 98,Yunong 202 and Huaimai 20 as the tested varieties,their dry weights were determined every three hours after their flowering,and then a mathematical model was constructed to analyze the quality variation rules of single wheat stem,grains and stalk.[Result] The quality of single stem showed a "fast—slow" variation tendency,the grain weight presented a variation tendency of "slow—fast—slow",the stem quality increased and then decreased.The change process of single stem,grains and 1 000-grain weight accorded with the Logistic growth curve;while the stalk quality showed a parabola change;the daily increment of single stem decreased sharply;while the daily increment of grains and stalk presented a parabola change.[Conclusion] The study provided theoretical references for the high-yield cultivation of wheat.