چکیده:
Application of biotic growth regulators (e.g. humic components) and appropriate mulches is recommended to improve turfgrass quality. However, limited research has investigated their effect on lawn establishment. To investigate the effect of humic acid and selected mulches on characteristics of Festuca arundinacea in its planting stage, a factorial experiment based on a completely randomized block design with three replications was performed. The first factor was mulch types including vermicompost, leaf compost, cow manure and sand (control) which were used to cover the seeds. The second factor was a humic acid solution (100 ml l-1) sprayed monthly over the period of the experiment. Plant height, fresh and dry weight of lawn clippings, photosynthetic index, leaf texture and overall turfgrass quality were measured. Spraying humic acid significantly improved the measured factors except the dry weight and photosynthetic index of the plants. Among the mulches, vermicompost provided better impressions on improving the characteristics of this turfgrass species including 48% increase in fresh weight, 18% increase in height, 48% increase in total quality and 10% reduction in leaf width of the turfgrass. This research can assist in developing knowledge for achieving better quality lawns in urban landscapes.
خلاصه ماشینی:
To investigate the effect of humic acid and selected mulches on characteristics of Festuca arundinacea in its planting stage, a factorial experiment based on a completely randomized block design with three replications was performed.
(2009) in a research on wheat plants grown in saline conditions demonstrated that application of humus in soil increased N uptake and application of humic acid on foliage increased uptake of P, K, Mg, Na, Cu and Zn. Hunter and Anders (2004) demonstrated that humic acid did not affect the nutritional status of the leaf tissues of Agrostis stolonifera (creeping bent grass), instead it had a positive effect on the root architecture and plant growth and the plant’s resistance to drought.
The major goal of this research was to evaluate the effects of foliar application of humic acid and use of some mulches on selected qualitative and quantitative characteristics of a native Festuca arundinacea (tall fescue) from Iran.
Humic acid (2 levels, 100 and 0 ml l-1 as control) and planting mulch types (4 levels including vermicompost, leaf compost, cow manure and sand as the control) were used as factors.
It is possible that enhancement in plants’ growth observed in this study are a result of the application of humic acid or vermicompost and could be attributed at least partially to increased nutrient uptake by the plants (Atiyeh et al.
Released humic acids from vermicompost also result to avoiding degradation and erosion of soil, increased moisture retention and promotion of plant growth (Gonzalez-Perez et al.