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本文对冬小麦群体分蘖动态进行了模拟,并分析了模型参数的生物学意义。然后用回归方法确定了模型参数与措施因子综合的定量关系,分析了措施因子对参数值的作用。还用13种函数方程对基本苗数、冬前茎数、最高茎数和穗数之间的相互关系进行了系统分析和模拟研究。初步结果为:冬前茎数随积温发展变化的规律可用y=k/(1+me~(-ax))描述;春季茎数随积温变化规律可用y=a_0+a_1x+a_2x~2来描述;提出利用参数与措施的定量关系以确定某种措施条件下的模型参数值,从而建立相应模型;提出利用分蘖消长、分蘖成穗的动态变化曲线(基本苗数,冬前茎数、最高茎数与穗数间的关系),确定指标穗数要求下基本苗数、冬前茎数的合理数量——“目标分段控制”,以此做为阶段控制指标之一。
In this paper, the tillering dynamics of winter wheat population were simulated and the biological significance of model parameters was analyzed. Then, the quantitative relationship between the model parameters and the measure factors is determined by the regression method, and the effect of the measure factors on the parameter values is analyzed. Thirteen kinds of functional equations were also used to systematically analyze and simulate the correlation between the number of basic seedlings, the number of stems before winter, the maximum number of stems and the number of spikes. The preliminary results are as follows: The law of development and change of stalks with temperature before winter can be described by y = k / (1 + me ~ (-ax)). The law of spring stalk can be described by y = a_0 + a_1x + a_2x ~ 2 ; The quantitative relationship between parameters and measures was put forward to determine the model parameters under certain measures to establish the corresponding model; the dynamic curve of tiller growth and tillering and panicle growth was proposed (the number of basic seedlings, the number of stems before winter, the highest stem Number and the number of spikes), to determine the number of indicators spike under the number of seedlings, the number of stems before winter a reasonable number - “target segmentation control”, as one of the indicators of stage control.