纳米碳对玉米氮素吸收及根系活力和土壤酶活性的影响

Effect of Nano-carbon on nitrogen absorption, root activity and soil enzyme of maize

为揭示纳米碳对作物生长的促进作用机理,以玉米东农253为试验材料,通过设置不同供氮水平,利用盆栽试验研究纳米碳对玉米氮素吸收及根系活力的影响。结果表明,N1+C(施氮150 mg·kg-1+纳米碳)、N2+C(施氮200 mg·kg-1+纳米碳)和N0+C(不施氮+纳米碳)处理的玉米植株生物量比N1(施氮150 mg·kg-1)、N2(施氮200 mg·kg-1)和N0(不施氮)分别增加4%、12.29%和32.60%;吸氮量比不添加纳米碳分别增加9.09%、8.33%和42.86%。除此之外,纳米碳的添加对玉米根系活力和土壤酶活性有促进作用,其中添加纳米碳处理的玉米根系活力分别增加2.2倍、2.3倍和1.9倍,根际土壤脲酶分别增加7.89%、28.26%和28.57%。由此可见,纳米碳可提高玉米根系活力,促进氮素吸收,从而促进玉米植株生长。

In order to explore the mechanisms of Nano-carbon on crop growth facilitation, a pot experiment with different nitrogen supplied levels were conducted to study the effects of Nano-carbon on nitrogen absorption and root activity of maize. The results showed that maize biomass in N1 ＋C （Nitrogen 150 mg · kg^-1 ＋ Nano-carbon）, N2＋ C （Nitrogen 200 mg · kg^-1 ＋ Nano-carbon） and NO＋ C （no nitrogen ＋ Nano-carbon） treatments increased 4%, 12.29% and 32.60% than Nl（Nitrogen 150 mg. kg^-1）, N2 （Nitrogen 200 mg. kg^-1） and handling NO （no nitrogen）treatments, and N uptake by maize increased 9.09%, 8.33% and 42.86%, respectively. In addition, addition of Nano-carbon affects maize root and soil enzyme activities. The maize root activities were 2.2, 2.3 and 1.9 times than those of without Nano-carbon treatments, respectively. Urease activities increased by 7.89%, 28.26% and 28.57%, respectively. Therefore, Nano-carbon enhanced roots activities of com, and promoted the absorption of nitrogen, resulting in the growth of maize.