营养型酸性土壤改良剂对氮素吸收利用的影响

The Effect of Nutritive Soil Modifier on Nitrogen Uptake and Utilization in Soil

营养型酸性土壤改良剂(以下简称NSM)施入氮、磷、钾养分水平差异较大的3种土壤,分别进行了土壤恒温培养试验和玉米盆栽试验。土壤恒温培养试验结果表明:酸性土壤施用NSM后,土壤碱解氮含量下降,提高了土壤对氮的保蓄能力,可以减少氮的淋失和挥发损失;玉米盆栽试验结果显示:酸性土壤施用NSM后,促进了玉米的生长和玉米对氮的吸收,提高氮的吸收利用效率。施用NSM后,养分水平较高的土壤1,氮吸收利用效率提高5.43%-12.31%;养分水平较低的土壤3,氮吸收利用效率提高5.14%-36.34%。

In the present study, Nutritive Soil Modifier （hereinafter abbreviated as NSM） was applied to acid soils with different character. An indoor soii incubation experiment were conducted and a greenhouse soil pot experiment with corn （Zea rnays L. ）. The major results of the indoor soil incubation experiment showed that the available content of nitrogen decreased with the addition of NSM, hence more nitrogen was preserved from losing. The results of the greenhouse soil pot experiment with maize showed that NSM could make maize to uptake more nitrogen and thus grow better, and lead to higher nitrogen uptake efficiency. When NSM was applied to soil 1 which contain higher nutrition, nitrogen uptake efficiency increased 5.43%-12. 31%. When NSM was applied to soil 3 which contain lower nutrition, nitrogen uptake efficiency increased 5. 14%-36.34%.