Gallardo-Lara F, Azcón M, Quesada J L, Polo A
Departamento de Agroecología y Protección Vegetal, Estación Experimental del Zaidín (C.S.I.C.), Granada, Spain.
J Environ Sci Health B. 1998 Sep;33(5):623-43. doi: 10.1080/03601239809373167.
A pot experiment using calcareous soil was conducted in a growth chamber to examine the effects of olive oil wastewater applications on Ca fractions in the plant and on exchangeable Ca in soil after plant growth. The experimental treatments consisted of two rates of olive oil wastewater, two mineral fertilizer treatments including K, which supplied K in amounts equivalent to the K supplied by the olive oil wastewater treatments, a mineral fertilizer without K treatment (F), and a control. The pots were sown with ryegrass which was harvested 3 times at monthly intervals. The high rate of olive oil wastewater resulted in a prolonged increases in dry matter production. It also resulted in a reduction in the concentrations of soluble Ca, bound Ca, inorganic insoluble Ca and organic insoluble Ca in the plant shoots relative to the control and the F treatment. The low rate of olive oil wastewater produced similar but less marked effects, with decreases being observed in the soluble Ca and bound Ca fractions. After 3 months of plant growth, soil exchangeable Ca was higher in the control and F treatment soils than in the soils receiving olive oil wastewater or K fertilizer. At this time, there were no significant differences in exchangeable Ca between the soils receiving olive oil wastewater and those treated with K fertilizer.
在生长室中利用石灰性土壤进行了盆栽试验，以研究施加橄榄油废水对植物中钙组分以及植物生长后土壤中交换性钙的影响。试验处理包括两种橄榄油废水施用量、两种矿物肥料处理（其中一种含钾，钾的施用量与橄榄油废水处理中钾的施用量相当）、一种不含钾的矿物肥料处理（F）以及一个对照。花盆中播种了黑麦草，每月收割一次，共收割3次。高施用量的橄榄油废水使干物质产量持续增加。与对照和F处理相比，它还导致植物地上部分可溶性钙、结合钙、无机不溶性钙和有机不溶性钙的浓度降低。低施用量的橄榄油废水产生了类似但不太明显的效果，可溶性钙和结合钙组分有所减少。植物生长3个月后，对照和F处理土壤中的土壤交换性钙高于接受橄榄油废水或钾肥处理的土壤。此时，接受橄榄油废水处理的土壤与施用钾肥处理的土壤之间的交换性钙没有显著差异。
