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首页> 外文期刊>Indian Journal of Weed Science >Estimation of yield losses of wheat caused by wild oats (Avena sterilis ssp.ludoviciana) Competition
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Estimation of yield losses of wheat caused by wild oats (Avena sterilis ssp.ludoviciana) Competition

机译：估计由野生燕麦（Avena sterilis ssp.ludoviciana）竞争引起的小麦单产损失

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摘要

Experiments were conducted to determine the effects of varying density of winter wild oats [Avena sterilis ssp. ludoviciana (Dur.) Nym.] on the grain yield of wheat (Triticum aestivum L.). The grain yield of wheat was reduced as wild oat density increased through the reduction in fertile tillers, spike length, grains per spike and test weight of grains. To predict the yield of wheat, the yield data were fitted to an empirical model based on hyperbolic relationships over wild oat densities. The observed and predicted yield losses were more or less similar. However, parameters estimated varied between years. The relationship between wheat and wild oats was also described by a non-linear regression model based on relative leaf area of weeds estimated shortly after sowing. This single parameter model also gave a good fit to the data on yield loss calculated from the observed weed free crop yields.
机译：进行实验以确定冬季野生燕麦[Avena sterilis ssp。 Ludoviciana（Dur。）Nym。]对小麦（Triticum aestivum L.）的谷物产量的影响。通过降低肥力分as，穗长，每穗粒数和籽粒重量，减少了野生燕麦的密度，从而降低了小麦的籽粒产量。为了预测小麦的产量，将产量数据拟合到基于野燕麦密度双曲线关系的经验模型。观察到的和预测的产量损失或多或少相似。但是，估计的参数在几年之间有所不同。还基于播种后不久估计的杂草相对叶面积的非线性回归模型描述了小麦与野燕麦之间的关系。这个单参数模型也非常适合根据观察到的无杂草产量计算出的产量损失数据。

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