College of Environment and Resource, Shanxi University, Taiyuan, Shanxi 030006, PR China.
Waste Manag. 2011 Nov;31(11):2203-7. doi: 10.1016/j.wasman.2011.06.010. Epub 2011 Jul 20.
To investigate the feasibility of using aged municipal solid waste as farmland soil, it is essential to study its nutritive compositions for plant growth. Previous studies have demonstrated that the properties of different particle-size aged refuse are very different, therefore, the present study was conducted to evaluate the adequacy of three elements (N, P, K) and the fractionation of inorganic P in the aged refuse with a particle-size distribution of 900 to 300, 300 to 150, 150 to 105, 105 to 90 and 90 to 0 μm. The results indicate that (1) total quantities of N, P, K were much larger than that in the general soil and the quantities of available N, P and K were also adequate; (2) total content of P was sufficient, but the ratio of available-P to total P was not high enough; (3) with the decrease of particle size, the contents of these elements presented different trends. The results implicate that total contents of N, P and K were enough for the aged refuse being exploited as cultivated soil, and different gradation of aged refuse could be added to improve poor soils. It provides scientific evidence for utilizing different particle-size aged refuse comprehensively.
为了研究将老化的城市固体废物用作农田土壤的可行性，研究其对植物生长的营养成分至关重要。先前的研究表明，不同粒径老化垃圾的性质差异很大，因此，本研究旨在评估粒径分布在 900 至 300、300 至 150、150 至 105、105 至 90 和 90 至 0 μm 之间的老化垃圾中三种元素（N、P、K）和无机 P 分级的充分性。结果表明：（1）N、P、K 的总量远大于一般土壤中的含量，有效 N、P 和 K 的含量也足够；（2）总磷含量充足，但有效磷与总磷的比例不够高；（3）随着粒径的减小，这些元素的含量呈现出不同的趋势。结果表明，老化垃圾的 N、P 和 K 的总量足以用作栽培土壤，并且可以添加不同的老化垃圾分级来改善贫瘠土壤。这为综合利用不同粒径的老化垃圾提供了科学依据。
