Impact of land application of cranberry processing residuals, leaves and biosolids pellets on a sandy loam soil

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• 作者：Cristiane San Miguel^a ; Daniel Gimé ; nez^a ; ^{gimenez@envsci.rutgers.edu} ; Uta Krogmann^a ; Sung Won Yoon^b
• 关键词：Acidic waste ; Land application ; Soil quality ; Within-field variation
• 刊名：Applied Soil Ecology
• 出版年：2012
• 期刊代码：14_09291393
• 类别：abs
• 出版时间：February, 2012
• 卷：53
• 期：Complete
• 页码：31-38
• 文件大小：488 K

摘要

Land application of organic wastes can be a cost effective and sustainable means of disposal, but their effect on soil ecosystems should be assessed; particularly when multiple wastes are applied. This study evaluates the effects on soil properties of cranberry processing waste applied alone at a rate of 6.8 Mg ha^鈭? y^鈭? for 11 years (CH) and of the same combined with municipally collected leaves (5 applications) and heat-dried biosolids (2 applications) at rates of 0.7 Mg ha^鈭? y^鈭?, 22 Mg ha^鈭? y^鈭? and 10 Mg ha^鈭? y^鈭?, respectively (CLB). Each treatment was represented by a single field on a commercial farm in central New Jersey with a sandy loam soil. At each field, composite samples and soil clods were collected from eight plots positioned along a transect. Properties measured included soil pH, extractable nutrients, organic carbon, dehydrogenase activity, metabolic diversity, bulk density and water retention. Soil at the CH field had significantly lower pH (p < 0.00005) and extractable nutrients, water content near saturation, and lower dehydrogenase activity (p < 0.05) than soil at the CLB field. Dehydrogenase activity was significantly correlated to both pH (p = 0.037) and entropy of pore size distribution (p = 0.014) derived from water retention data. Values of soil properties varied systematically from the edge to the center of the fields, suggesting that spatial variation resulting from uneven application of a waste should be considered when assessing amended fields. This work also shows that application of dissimilar wastes in combination can be used to balance soil properties such as pH.