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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 reveal the promoting mechanism of nano-carbon on crop growth, taking Dongnong 253 as experimental material, the effects of nano-carbon on nitrogen absorption and root activity of maize were studied by setting different nitrogen levels. The results showed that the treatments of N1 + C (N 150 mg · kg-1 + N), N2 + C (N 200 mg · kg-1 + N) and N0 + C The biomass of maize plants increased 4%, 12.29% and 32.60%, respectively, than that of N1 (150 mg · kg-1 N), N2 (200 mg · kg-1) and N0 Without adding nano-carbon, 9.09%, 8.33% and 42.86% respectively. In addition, the addition of nano-carbon promoted the root activity and soil enzyme activity of maize. The root activity of maize treated with nano-carbon increased by 2.2 times, 2.3 times and 1.9 times, and that of rhizosphere soil increased by 7.89% 28.26% and 28.57%. Thus, nano-carbon can improve corn root activity and promote nitrogen absorption, thereby promoting the growth of corn plants.