摘要
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 rainfall of Luoyang in recent 30 years, simulating different annual rainfall types, the paper studies coupling effect of nitrogen, phosphorus and water as well as its influence on yield of wheat by using rain protection shed. The highest yield and the modest fertilizer input under different rainfall types are determined when soil moisture is same according to regression model. The results show that moisture exerts a most tremendous influence on yield of winter wheat, effect of fertilizer on yield is changable according to its different input; when input of fertilizer is below the most moderate input, effect of N is higher than P, while it is beyond the most moderate input, N and P both have a negative effect of yield increasing, but negative effect of P is higher than N.
出处
《南京农专学报》
2000年第3期39-42,47,共5页
Journal of Nanjing Agricultural Technology College
关键词
旱地农业
小麦
土壤水分
肥料
耦合效应
产量
dryland agriculture
wheat
coupling of water and fertilizer
eff€
