Soil Properties and Nutrient Export of a Duplex Hard-Setting Soil Amended with Compost

Autor: Warwick John Dougherty, Kwong Yin Chan
Rok vydání: 2014
Předmět:
Zdroj: Compost Science & Utilization. 22:11-22
ISSN: 2326-2397
1065-657X
DOI: 10.1080/1065657x.2013.870943
Popis: Soils managed for field vegetable production often receive high nutrient inputs and are frequently cultivated. This can result in agronomically excessive soil P and soil structural degradation. In combination, these can lead to large losses of nutrients in runoff that can impact on aquatic environments. We investigated the effect of compost application at 62.5 and 125 t ha−1 in both 2005 and 2008 on soil nutrient and physical properties and runoff and nutrient export using simulated rainfall/runoff. The use of compost reduced (p < 0.01) the accumulation of available P in soils compared to conventional fertilizers but still resulted in excessively high soil P levels. The application of compost increased water stable aggregates, increased infiltration rates, and reduced the volume of runoff (all p < 0.01). Compost at either rate reduced runoff volumes by ∼50% compared to conventionally managed soils. As a consequence of reduced nutrient inputs/accumulation and improved soil physical properties, the...
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje