Predicting Corn Yield Response to Planting Date Delay
Predicting Corn Yield Response to Planting Date Delay
复制标题
预测玉米产量对种植日期延迟的反应
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
R. Evans
中科院分区：
文献类型：
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作者：
R. Seymour;R. Skaggs;R. Evans
在北卡罗莱纳东部进行了一项为期两年的实地研究，以确定延迟播种对玉米产量的影响。为了量化受排水系统设计影响的可通行性对产量的影响，需要确定产量与种植日期之间的关系。玉米种植在3月中旬至6月初的排水和灌溉地块上。结果表明：4月10日以后，产量随播种日期的推迟而下降。结果与早期的非灌溉试验结果基本一致。相对产量Y与4月10日以后种植日期延迟D之间的关系可以用分段线性关系来描述：当D < 40时，Y = 1.0 ~ 0.0088 D；Y = 1.3 ~ 0.0162 D，对于40 = D < 80。类似的关系也从其他8个地区的文献数据中得出。虽然在产量随种植延迟而下降的阈值日期上存在差异，但大多数地区的方程参数都在相对较小的范围内。这些关系可以用在水管理模拟模型中，用于预测排水设计对种植延迟和相对产量的影响。
A two-year field study was conducted to determine the effect of delay in planting on corn yield in eastern North Carolina. The relationship between yield and planting date is needed in order to quantify the effects of trafficability, as influenced by drainage system design, on yield. Corn was planted on drained and subirrigated plots at planting dates ranging from mid-March to early June. Results indicated that yield decreased with planting date delay after 10 April. Results were in general agreement with those in earlier unirrigated experiments. The relationship between relative yield, Y, and planting date delay, D (days), beyond 10 April could be described by a piecewise linear relationship: Y = 1.0 – 0.0088 D, for D < 40; and Y = 1.3 – 0.0162 D, for 40 = D < 80. Similar relationships were derived from data published in the literature for eight other locations. Although there were differences in the threshold date beyond which yields decreased with delay in planting, the equation parameters fell within a relatively small range for most locations. These relationships can be used in the water management simulation model, DRAINMOD, to predict the effect of drainage design on planting delay and relative yield.