中文版 | English
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Drought-tolerant and Short-season Corn Hybrids to Mitigate Risk, Optimize Yield and Profit, while Increasing Water Use Efficiency
Williams, John Joseph
出版年2018
学位类型硕士
导师Henry, W. Brien
学位授予单位Mississippi State University
英文摘要The Mississippi River Valley Alluvial Aquifer (MRVAA) aquifer is the principal water source for Mid-South irrigators, but the current rate of withdrawal from the aquifer is not sustainable. Means to increase the sustainability of the MRVAA is to improve corn’s water use efficiency (WUE) while, concurrently, maintaining or improving profitability. The objectives of this experiment were to determine the effects of sensor-based irrigation threshold, planting date, and hybrid on corn grain yield, WUE, and net returns above seed and irrigation cost. Season long irrigation thresholds of -50 kPa full irrigation (FI) and -125 kPa limited irrigation (LI) were used, utilizing furrow irrigation. In conclusion, utilizing a delayed irrigation trigger of -125 kPa decreases grain yield and, ultimately, net returns in years with less naturally occurring rainfall, but increases WUE. Shifting the planting date earlier and using full-season (FS) hybrids, increases grain yield, WUE, and net returns.
英文关键词Aquifer Corn Drought-tolerant Hybrid Irrigation Planting date
语种英语
国家United States
来源学科分类Agronomy
URLhttps://pqdtopen.proquest.com/doc/2040352157.html?FMT=AI
来源机构Mississippi State University
资源类型学位论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/251038
推荐引用方式
GB/T 7714		 Williams, John Joseph. Drought-tolerant and Short-season Corn Hybrids to Mitigate Risk, Optimize Yield and Profit, while Increasing Water Use Efficiency[D]. Mississippi State University,2018.
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