期刊
HORTICULTURAE
卷 7, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/horticulturae7100371
关键词
organic amendments; compost; peat; horticulture; gardening; garden soil; nitrogen budget; Lavatera trimestris
类别
资金
- Industrial Co-Operative Award in Science and Engineering (CASE) - Biotechnology and Biological Sciences Research Council (BBSRC)
- Industrial Co-Operative Award in Science and Engineering (CASE) - Royal Horticultural Society (RHS)
- Industrial Co-Operative Award in Science and Engineering (CASE) - Department for Environment, Food, and Rural Affairs (Defra)
The application of various organic amendments in horticulture can result in significant differences in soil characteristics and crop yields. For instance, garden waste compost can greatly increase yield, while composted bark or peat may not have a significant impact on yield. Pressure is increasing to remove peat from products available to domestic gardeners.
Application of organic amendments to soil is commonplace in domestic gardening. However, a vast array of materials could be labelled as 'compost' by retailers and suppliers. We investigated six different amendments currently used, or available for use, in horticulture: composted bark, composted bracken, spent mushroom compost, composted horse manure, garden waste compost (at two different application rates), and peat. Using a controlled field experiment, we examined the physicochemical differences between the amendments, the subsequent effects on soil characteristics, and resultant yield and biometrics of Lavatera trimiestris. Amended soils resulted in a significantly different multivariate soil environment and N budget when compared to the unamended control. However, the effect on yield and plant biometrics (number of flowers, plant height, etc.) depended on the amendment used. Application of garden compost resulted in up to a five-fold increase in yield. However, there was no significant difference in yields in soils amended with composted bark or peat, when compared to the unamended control. This has implications, as there is increasing pressure to remove peat from products available to domestic gardeners. The variability in the different amendments investigated in our research, in addition to the variable effects on plant growth parameters, suggests that repeated use of a single amendment may not be best practise for gardeners.
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