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通过统计分析洛阳地区近 3 0 a的降雨量 ,模拟洛阳地区不同的降雨年型 ,利用防雨旱棚研究旱地农业 N、P、水的耦合效应及其对小麦产量的影响 ,并根据回归模型 ,初步确定了在底墒一定条件下不同降水年型的最高产量和最适肥料投入量。试验结果表明 :水分对冬小麦产量影响最大 ,肥料对产量的效应因投入量不同而不同 ,在低于最适投入量时 ,N的增产效应大于 P;而高于最适投入量时 ,N、P均有负增产效应 ,P的负效应大于 N。
Based on the statistical analysis of the rainfall in Luoyang over the past 30 years, the different types of rainfall in Luoyang were simulated, the coupling effect of N, P and water in dryland agriculture and their effects on the yield of wheat in rainfed rainy canopy were studied. According to the regression model , Preliminarily determined the maximum yield of different precipitation years and the optimum fertilizer input under the certain conditions of soil moisture. The results showed that moisture had the most significant effect on the yield of winter wheat, and the effect of fertilizer on yield was different due to different inputs. Below the optimum input, the yield increase of N was greater than P; while above the optimum input, P have a negative effect of increasing production, P negative effect is greater than N.