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中文摘要：
通过堆肥污泥改性黄土盆栽胡麻实验,研究了不同污泥施入量对胡麻幼苗生长及植株Cd、Ni、Pb吸收的影响。实验结果表明,随着污泥施入量的增加,混合基质中有机质、TN、TP和重金属的含量均有不同程度提升,p H逐渐减小并趋于中性;污泥施入量为1%时胡麻种子的发芽时间明显缩短、发芽率提高、幼苗株高增加,且F1相比对照实验胡麻幼苗F0生物量增加了3.79%,该条件下幼苗茎秆茎干对中Cd、Ni、Pb的吸收率分别为9.30%、1.29%和1.43%;施入量超过25%后胡麻种子的发芽和生长受到严重抑制。得出：堆肥污泥施入量控制在6.75-7.5 t/hm2可以有效改善黄土性土壤的种植条件,有望提高该地区胡麻的产量。
英文摘要：
Loess modified with WWTP sludge that had been composted with wheat stalk was used in a pot experiment, in which flax seedling growth and heavy meal such as Cd, Ni and Pb absorbed by flax were studied. With the application of composted sludge content of organic matter, TN, TP and heavy metal was increased in pot soil, the ＂mixed media＂, while pH increased tending to neutral. On the other hand, flax seed germination time was shorten when 1% of the composted sludge was applied, the germination rate and height of crop was raised simultaneously; the biomass increased by 3.79% compared with F1, the value of control; and the rate of flax accumulation of Cd, Ni and Pb in flax were 9.30%, 1.29% and 1.43%, respectively. However, flax seed germination and growth were severely inhibited when the content of sludge applied was beyond 25%. In conclusion, WWTP sludge after composting treatment, in a proper amount, applied into loess at the level ranging between 6.75-7.5 t/hm2 could improve flax growing conditions, hopefully to increase the output of flax in the area.
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