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以种植紫穗槐(Amorpha fruticosa Linn.)的植物卷材试件为研究对象,研究了植物卷材中紫穗槐氮磷钾的利用流失规律;采用5个多效唑浓度梯度(0.004、0.020、0.040、0.060、0.080g·L~(-1)),研究了多效唑对植物卷材中紫穗槐的氮磷钾利用和生物量产生的影响。结果表明:氮磷钾在成分单一的植物卷材基质中随冲刷的流失速度较快。在7次破坏试验中,基质中氮的损失量为22.4%,磷的损失量为15.9%,钾的损失量为25.4%。多效唑对植物利用固定氮磷钾的效应和对其生物量的影响有明显不同。紫穗槐(Amorpha fruticosa Linn.)在多效唑浓度为0.080g·L~(-1)时固定利用的氮磷钾最多,但此浓度并非紫穗槐营养生长最旺盛的浓度,反而多效唑浓度为0.040g·L~(-1)时,紫穗槐的生物量最大。
In this study, plant samples from Amorpha fruticosa Linn. Were used to study the loss of N, P and K from Amorpha fruticosa, and the concentration gradient of 5 paclobutrazol (0.004, 0.020, 0.040 , 0.060,0.080g · L -1). The effects of paclobutrazol on N, P, K utilization and biomass production of Amorpha fruticosa L. were studied. The results showed that the loss of N, P and K with scouring in the single plant matrix was rapid. In seven failure tests, the amount of nitrogen loss in the matrix was 22.4%, the amount of phosphorus lost was 15.9%, and the amount of potassium lost was 25.4%. The effect of paclobutrazol on the use of fixed nitrogen, phosphorus, and potassium plants and their effects on biomass were significantly different. Amorpha fruticosa Linn. Was the most widely used NPK at the concentration of 0.080 g · L -1, but this concentration was not the most vigorous growth of Amorpha fruticosa Linn., But the concentration of paclobutrazol was 0.040 The biomass of Amorpha fruticosa was the highest at g · L -1.