Comparison of Models in Assessing Relationship of Corn Yield with Plant Height Measured during Early- to Mid-Season
Comparison of Models in Assessing Relationship of Corn Yield with Plant Height Measured during Early- to Mid-Season
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DOI：
10.5539/jas.v3n3p14
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发表时间：
2011-08
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影响因子：
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通讯作者：
X. Yin;Ngowari Jaja;M. Angela McClure;Robert M. Hayes
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文献类型：
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作者：
X. Yin;Ngowari Jaja;M. Angela McClure;Robert M. Hayes
玉米(Zea Mays L.)在早中期测得的株高产量有可能被用来开发用于指导田间变量施氮量的算法。本研究评价了线性模型、二次模型、平方根模型、对数模型和指数模型在评估玉米产量与株高关系方面的表现，这些模型在三个生育期和四种种植制度下连续三年进行。这5个模型的决定系数(R2)值在三年的综合数据上，在每个种植制度和年份内的每个生育阶段或每个种植制度内的决定系数(R2)值基本相似。结果表明，在不同种植制度和不同天气条件下，这些模型均能较好地描述早中期玉米产量与株高的关系，但线性模型因其简单性而可能成为首选模型。
Relationship of corn (Zea mays L.) yield with plant height measured during early- to mid-season may possess the potential to be used to develop algorithms for guiding variable-rate N applications within a field. This study evaluated the performance of the linear, quadratic, square root, logarithmic, and exponential models in assessing the relationship of corn yield with plant height measured at three growth stages and four cropping systems for three years. The determination coefficient (R 2 ) values of these five models were generally similar at each growth stage within each cropping system and year or within each cropping system on the three-year combined data. Our results suggest that all these models could be used to describe the relationship of corn yield with plant height during early- to mid-season under different cropping systems and weather conditions, but the linear model may be the preferred model because of its simplicity.