小分子有机物质螯合钙肥的应用效果

采用盆栽试验，将两种小分子有机物(氨基酸、糖醇)为主剂的螯合钙肥与单质硝酸钙和市场钙肥产品糖醇钙(糖醇螯合钙)比较，研究叶面喷施和根施两种施肥方式对小白菜生长、品质和养分吸收的影响。结果表明：与硝酸钙和糖醇钙相比，无论是喷施还是根施，两种小分子有机物质螯合钙肥都能在不同程度上提高小白菜的钙吸收量，提高其生物量，改善品质；喷施和根施小分子有机物螯合钙肥Ⅰ与分别施用硝酸钙相比，小白菜生物量分别提高了33.63％和31.55％；喷施和根施小分子有机物质螯合钙肥Ⅱ与施用硝酸钙相比，小白菜的生物量分别提高了18.95％和49.95％。与硝酸钙相比，两种小分子有机物质螯合钙肥喷施可使植株钙累积量分别平均提高5.31％和6.84％；根施则使植株钙累积量分别提高13.51％和45.31％。另外，喷施、根施两种小分子有机物质螯合钙肥与施用硝酸钙与糖醇钙相比，均不同程度地提高了小白菜的Vc和可溶性蛋白含量，降低了硝态氮含量。因此，以氨基酸和糖醇为主剂的螯合钙肥无论采用喷施还是根施，都能对小白菜起到良好的增产提质效果。

Application of small molecular organics chelated calcium fertilizer

Pot experiments were conducted to study the effects of two small molecule organic compounds ( amino acids, sugar alcohol) chelated calcium fertilizers and calcium nitrate and Tangchun calcium fertilizer which was a market calcium production on Chinese cabbage growth, quality and nutrients uptake by spraying and fertigation. The results showed that, compared with calcium nitrate and Tangchun calcium fertilizer, the small molecule organic compounds ( amino acids, sugar alcohol) chela-ted calcium fertilizers promoted the calcium uptake, enhanced the growth and improved the quality of Chinese cabbage by spra-ying and fertigation. Compared with calcium nitrate, the biomass of the brassica chinensis calcium treated with fertilizerⅠwas increased by an average of 33. 63% and 31. 55% respectively under two different fertilization methods. Moreover, when the fertilizers were used in foliar spraying, compared with calcium nitrate, the biomass of the treatment which was spraying calcium fertilizer Ⅱ was increased by an average of 18. 95%; when the fertilizers were used in fertigation, compared with calcium ni-trate, the biomass of the treatment which was fertilized by calcium fertilizer Ⅱincreased by 49. 95%. Compared with calcium nitrate, the treatment spraying two kinds of calcium fertilizer increased the accumulation of calcium by 5. 31% and 6. 84%;with fertigation, the accumulation of calcium increased by 13. 51% and 45. 31%. Furthermore, compared with the treatment that using calcium nitrate and Tangchun calcium, two kinds of calcium fertilizer increased the Vc content, soluble protein, de-crease the nitrate content in different degree no matter under the spraying or fertigation. In conclusion, the application effect of small organic molecules chelated calcium fertilizers was better than other fertilizers no matter under spraying or fertigation.