Effects of Potassium on the Growth, Quality and Potassium Accumulation of Different Brassica campestris L. ssp. pekinensis Varieties

doi:10.11924/j.issn.1000-6850.2013-2267

Abstract

Abstract: In order to obtain the high yield and quality of Chinese cabbage under limited potassium resources using its hereditary feature, different varieties (‘Defeng 1’, ‘Degao 8’, ‘Fengkang 70’, ‘Dajiang 78’, ‘Julong 83-24’ and ‘Yiheqiu’) were studied in performances of growth and quality with two potassium levels (low potassium and high potassium). The results showed that, under the low potassium, the biomass and potassium accumulation of ‘Defeng 1’ were the highest. The biomass of Chinese cabbage treated by high potassium were higher significantly than that in low potassium except ‘Defeng 1’. Compared with the low potassium, potassium treatment increased the potassium accumulation, but the degree varied by variety, the changes of ‘Defeng 1’was the lowest. Potassium application increased the soluble protein and Vc contents, decreased nitrate content in all the Chinese cabbage cultivars. These results indicated that potassium could promote Chinese cabbage seedlings growth and enhance the nutritive quality, ‘Defeng 1’ had the strongest adaptability to low-potassium stress among the six Chinese cabbage varieties.

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