里氏木霉FS10-C对伴矿景天吸取修复镉污染土壤的强化作用

摘要

为提高伴矿景天对Cd污染土壤的修复效果,通过盆栽模拟试验,研究了木霉(Trichoderma)对伴矿景天生和Cd修复效率的影响.结果表明:Cd的加入抑制了伴矿景天的生长；伴矿景天在Cd含量为5 mg/kg模拟污染土壤中对Cd提取效率最高.在不同Cd污染水平下,里氏木霉(T.reesei)FS10-C使伴矿景天地上部干重比对照组增加了17.1％ ～42.5％,显著提高伴矿景天地上部对Cd的积累；在15 mg/kg Cd处理下,里氏木霉FS10-C处理组植物地上部Cd积累量高于对照组46.2％但对于土壤中NH4OAc提取态Cd含量影响不显著.说明里氏木霉FS10-C能提高伴矿景天对Cd的抗性,增加其生物量,从提高其修复效率.因此,里氏木霉FS10-C具有强化伴矿景天修复Cd污染土壤的应用潜力.%With 4-factor quadratic regression general rotation design, the effects of irrigation, nitrogen, phosphorus and potassium fertilizers on yield of processing potato were studied and the corresponding regression model were obtained. The results showed that: the effect of the four factors on potato yield was in an order of irrigation>N>K>P. There was interaction between the four factors. The maximum yield of processing potato simulated by computer was 46.75 t/hm2, corresponding to irrigated water, N, P, K fertilizer usages of 2520m3/hm2,457.5 kg/hm2, 825.0 kg/hm2 and 247.5 kg/hm2. The optimal selection model from nitrogen, phosphorus and potassium ratio of the highest yield, fertilizer costs, fertilizer profits, investment efficiency of fertilizer were 0.86 × 104 Yuan/hm2, 1.88 × 104 Yuan/hm2 and 2.19 Yuan/Yuan.