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Local variability of soil nutrient parameters in Japanese small size field

机译:日本小田地土壤养分参数的局部变化

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摘要

Local variability of soil parameters, NO3-N, EC and pH, was evaluated in square areas of 4.2×4.2 m{sup}2 for maize growing field (0.6 m grid) and for 10×10 m{sup}2 for paddy field (1m grid. dry soil after harvesting). Soil samples were collected from three layers: top (5-15cm deep), middle (15-25 cm deep) and bottom (25-35 cm deep). Spatial data of NO3-N followed a logarithmic normal distribution in the maize field and a normal distribution in the paddy field. In the maize field high correlationbetween the layers was estimated in terms of NO3-N. Semi-variance analysis indicated uniform spatial variance in the maize field, and in the paddy field uniform variance along the crop rows but logarithmic variance along the lateral.
机译:在玉米种植田(0.6 m网格)和稻田10×10 m {sup} 2的4.2×4.2 m {sup} 2的正方形区域中,评估了土壤参数NO3-N,EC和pH的局部变异性(1m网格。收获后为干燥土壤)。从三层收集土壤样品:上层(深5-15厘米),中层(深15-25厘米)和下层(深25-35厘米)。 NO3-N的空间数据在玉米田中呈对数正态分布,在稻田中呈正态分布。在玉米田中,根据NO3-N估算了各层之间的高度相关性。半方差分析表明玉米田中空间均匀变化,而稻田中作物行沿空间均匀变化,而侧向沿对数变化。

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