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首页> 外文期刊>International Journal of Agricultural and Biosystems Engineering >Seasonal Variability of Maize Yield on a Compacted Sandy Loam Soil in a Tropical Environment
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Seasonal Variability of Maize Yield on a Compacted Sandy Loam Soil in a Tropical Environment

机译：热带环境中压实砂土土壤玉米产量的季节变化

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The effect of weather changes on the yield of maize on a compacted sandy loam soil was investigated. The experiment was conducted in the teaching /research farm of the Rivers State University, Port Harcourt, Nigeria. The research started during the wet (rainy) season in October, through the dry season in February. Five experimental field plots were used in the study. The plots were subjected to different levels of compaction by routine tillage operations and wheel traffic, using a Massey Ferguson (MF) 260 tractor and an MF90 disc plough, before the maize seeds were planted. Field data of crop emergence, growth rate and crop yield were taken at regular intervals within the different seasons. Analysis of the results showed an inverse-proportional relationship between maize yield and compaction during the wet season and a direct-proportional relationship during the dry season up to a certain optimal compaction level, when a shift was noticed. It was, therefore, found that different optimum levels of compaction for increased maize yield exist for the wet and dry seasons, respectively. Furthermore, the compacted soil within the optimum limit had better yield during the dry season. On the whole, although the fields with lower bulk densities performed better at the beginning of the study, they were out-performed by those of higher bulk densities by the end of the experiment. Thus, while the plots of bulk densities of 1.17 and 1.23 g/mm3 had better yield during the wet season, they were out-performed by the plots of bulk densities of 1.28 and 1.35 g/mm3 during the dry season.
机译：研究了天气变化对压实砂土土壤玉米产量的影响。该实验是在河流州立大学的教学/研究农场进行的，尼日利亚港哈尔科特港。该研究在10月份潮湿（雨季）季节，通过旱季于2月。研究中使用了五个实验场地块。在种植玉米种子之前，通过常规耕作操作和车轮交通进行常规耕作操作和车轮交通进行不同水平的压实水平的压实水平的耕种操作和MF90盘犁。在不同季节的定期间隔采取作物出苗，增长率和作物产量的现场数据。结果分析显示玉米产量与湿季节的压实之间的反比作比关系，当注意到时，在干燥季节的干燥季节的直接比例关系中，当注意到时，在一定的最佳压实水平。因此，它发现湿和干燥季节的增加的玉米产量增加了不同的最佳压实水平。此外，在干燥季节期间，最佳限制内的压实土壤具有更好的产量。总的来说，尽管在研究开始时具有较低散装密度的田间，但在实验结束时，它们被更高批量密度的那些出现了。因此，虽然在潮湿的季节的散装密度的围块的曲线具有更好的产量，但是在干燥季节中由1.28和1.35g / mm3的散装密度的图表出来。

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