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研究了施肥对旱地冬小麦总茎数、叶面积系数及干物质积累和经济产量的影响 ,并探讨了这些生长因素与经济产量之间的关系。结果表明 ,施肥使冬小麦分蘖增多 ,总茎数和每公顷成穗数增加 ;使各生育期叶面积系数及干物质积累量增大 ,特别使灌浆期保持较高数值。不同施肥水平下的干物质积累过程均可以用指数方程 y=aeb/x很好拟合 ,而且方程中的 a值随施肥水平提高而增大 ,b值基本稳定。相关分析表明 ,冬前、灌浆阶段冬小麦生长状况对经济产量的形成尤为重要
The effects of fertilization on the total stem number, leaf area coefficient, dry matter accumulation and economic yield of winter wheat in dryland were studied, and the relationship between these growth factors and economic yield was discussed. The results showed that the fertilization increased the tillering of winter wheat, the total number of stems and the number of spikelets per hectare, and increased the leaf area coefficient and dry matter accumulation in each growth period, especially keeping a high value during grain filling. The process of dry matter accumulation under different fertilization levels can be well fitted by the exponential equation y = aeb / x, and the value of a in the equation increases with the increase of fertilizer application, and the value of b is basically stable. Correlation analysis showed that the growth of winter wheat in winter before and during the filling stage was particularly important for the economic yield formation