钾钙肥中氧化硅的缓释性研究(二)

Study of Slow-Release Properties of Silicon Oxide in Potash-Calcium Fertilizers(Part Ⅱ)

分别采用水浸泡法、间歇连续淋洗法和连续淋洗法研究了钾钙肥中氧化硅的缓释性,考察了不同模拟土壤介质的淋洗结果,并从介质饱和含水率、水分张力和阳离子交换量等方面分析了模拟土壤的效果。试验表明:水浸泡法与无介质连续淋洗法结果具有良好的相关性,都符合y=ax+b释放模型;相同介质间歇淋洗法和连续淋洗法结果也具有良好的相关性;蛭石+草炭(体积比1:1)能更好地模拟土壤性能。

The slow-release property of silicon in potash-calcium fertilizers is studied by the water immersion, batch elution and continuous elution method, respectively; elution results are inspected from various simulated soil media; and the results from simulated soils are analyzed for the rate of saturated water content of the media, the moisture tension and the cation exchange capacity. The experiment indicates that the results of water immersion and media-free continuous elution have good correlation, and all conform to the y = ax ＋ b release model ; the results of identical mediabatch elution and continuous elution have also good correlation ; vermiculite ＋ soil （ volume ratio 1 ： 1 ） can simulate better the soil properties.