造纸黑液与无机肥对草地早熟禾抗寒性的影响比较

Comparison of effects of pulping black liquor and inorganic fertilizer application on the cold resistance of Poa pratensis

在晚秋自然降温过程中,通过对草地早熟禾(Poa pratensis)叶片生理生化指标和表观品质的跟踪测定、比较,研究了造纸黑液和无机肥对草地早熟禾抗寒性的影响。结果表明,造纸黑液和无机肥不同程度地提高了草地早熟禾抗寒锻炼的效果。无机肥显著促进了草地早熟禾叶片游离脯氨酸(Fpro)的积累,最大含量为868.95μg/g。造纸黑液显著提高了草地早熟禾叶片的超氧化物歧化酶(SOD)活性和可溶性糖(WSS)含量,最大值分别为201.16 U/g和137.15μg/g。无机肥处理延长草坪绿期约10 d,造纸黑液处理延长草坪达40 d。相对于无机肥,造纸黑液更为显著地提高了草地早熟禾的抗寒性,并保持了较高的草坪观赏性。

The physiological and biochemical indexes and apparent quality of leaves were trace-determined in autumn to compare the effects of pulping black liquor and inorganic fertilizer application on the cold resistance of Poa pratensis. The results of this study showed that the pulping black liquor and inorganic fertilizer enhanced the cold hardening effect of P. pratensis to some degrees. The inorganic fertilizer increased the accumulation of free proline with a maximum concentration of 868.95μg/g, while the pulping black liquor increased the activity of superoxide dismutase （SOD） with 201.16 U/g and the content of soluble sugar （WSS） with 137.15 μg/g. The inorganic fertilizer prolonged the turf green period for about 10 days, while the pulping black liquor did it for about 40 days. The pulping black liquor enhanced the cold resistance of P. pratensis more effectively and maintained a higher apparent quality.