Physical fractionation of a municipal solid waste compost was performed by a dry sieving process to obtain two particle size fractions (> 1.6 mm and 0.8–1.6 mm). The compost with the two particle sizes and the whole unfractionated compost were applied to field soil, and the effect of different size fractions of compost on the growth and physiological characteristics of Lolium perenne L. were investigated. The results showed that the plant height and shoot biomass of L. perenne were higher in the treatments with the whole compost and > 1.6 mm size fraction compared with the control throughout the growing season, but the difference between treatments decreased gradually. The chlorophyll content in these two treatments was also higher than that in the control. The biomass, chlorophyll b, and total chlorophyll content of the second harvest were 23.8%, 82.1%, and 13.9%, respectively, higher in the > 1.6 mm size fraction treatment than in the control. In addition, L. perenne had a dark green color and uniform plants in the > 1.6 mm fraction treatment, which scored the highest in the comprehensive evaluation of turf quality. Plants treated with the coarse fraction of > 1.6 mm showed a strong photosynthetic capacity and maintained a high protective enzyme activity and proline content to improve stress resistance.

中文翻译：

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城市固体垃圾堆肥中不同大小的分数对黑麦草生长的影响。

通过干筛过程对城市固体废物堆肥进行物理分馏，以获得两个粒径级分（> 1.6 mm和0.8-1.6 mm）。将两种粒径的堆肥和整个未分级堆肥应用于田间土壤，研究了不同大小的堆肥对黑麦草生长和生理特性的影响。结果表明，紫苏的株高和枝条生物量在整个生长季节中，与整个对照相比，全堆肥处理和大于1.6毫米大小分数的处理均较高，但处理之间的差异逐渐减小。这两种处理中的叶绿素含量也高于对照中的。第二次收获的生物量，叶绿素b和总叶绿素含量分别在> 1.6 mm尺寸级分处理中比对照高23.8％，82.1％和13.9％。此外，L。perenne> 1.6 mm分数处理时，其颜色为深绿色且植株均匀，在草皮质量的综合评估中得分最高。用大于1.6 mm的粗级分处理的植物表现出强大的光合作用能力，并保持较高的保护酶活性和脯氨酸含量，从而提高了抗逆性。