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首页> 外文期刊>American journal of applied sciences >Spatial-Temporal Yield Trend of Oil Palm as Influenced by Nitrogen Fertilizer Management | Science Publications
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Spatial-Temporal Yield Trend of Oil Palm as Influenced by Nitrogen Fertilizer Management | Science Publications

机译：氮肥管理对油棕时空产量趋势的影响科学出版物

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> One of the major challenges in oil palm (Elaeis guineensis Jacq.) plantations today is proper interpretation of yield maps for site-specific management and identification and understanding of the causal factors influencing the variability of oil palm yields. A study was conducted to examine the structural yield variation in order to assess the spatial and temporal yield trends so as to interpret multi-year yield maps of oil palm as influenced by the long-term N fertilizer applications in the palm circle in fertilizer response trial in Sabah, Malaysia. Two clusters of palms were selected for the study; with and without N fertilizer applications for the past 10 years. Fresh fruit bunch (ffb) yields were recorded and summarized on an annual basis. Geostatistical analysis was used to characterize the spatial structure of the semivariogram while point kriging was used to interpolate the ffb yields at unsampled locations. A classified management zone map was developed based on the spatial and temporal stability yield maps from 1992-1999. Semivariance analysis revealed that the yield variations between plots and within plots could be distinguished from the structural semivariogram. The variability between plots was relatively higher compared with within plots. The maximum range of the semivariance of both fertilizer treatments was about 6-palm distance which corresponded well to the experimental plot size of 30 (5
机译： >今天，油棕（ Elaeis guineensis Jacq。）人工林的主要挑战之一是正确解释产量图，以进行特定地点管理以及识别和理解影响影响的因果油棕产量的变化性。进行了一项研究来研究结构性产量变化，以评估时空产量趋势，以便在肥料响应试验中解释受棕壤中长期施用氮肥影响的油棕多年产量图。在马来西亚沙巴选择两簇棕榈树进行研究。在过去的10年中，无论是否使用氮肥，均会出现。每年记录并总结新鲜水果束（ffb）的产量。地统计分析用于表征半变异函数的空间结构，而点克里金用于在未采样位置内插ffb收益。基于1992-1999年的空间和时间稳定性产量图，开发了分类的管理区域图。半方差分析表明，地块之间和地块内的产量变化可与结构半变异函数区分开。与地块内相比，地块之间的变异性相对较高。两种肥料处理的半方差的最大范围约为6-palm距离，这与30个试验样区的大小非常吻合（5

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