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| Effects of Chemical Fertilizer Reduced and Substituted Partially by Organic Nitrogen on Soil, Yield and Quality of Flowering Chinese Cabbage |
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| DOI：10.16768/j.issn.1004-874X.2020.05.008 |
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| Abstract: |
| 【Objective】The objective was to study the effects of“chemical fertilizer nitrogen substituted partially by organic nitrogen and reduced application of chemical fertilizer”on soil in vegetable fields with high intensification and yield and quality of flowering Chinese cabbages, and explore the appropriate proportion for the partial substitution of chemical fertilizer nitrogen by organic nitrogen.【Method】A field plot experiment was conducted in Nansha District of Guangzhou City with five treatments: CK（no-fertilizer）; CF（conventional fertilization, N 105 kg/hm2 + P2O5 30 kg/hm2 + K2O 60 kg/hm2）; RF（CF reduced by 10%）; T15（CF substituted by15% N of organic fertilizer）and T30（CF substituted by 30% N of organic fertilizer）.【Results】Compared with treatment CF, the yields of Chinese flowering cabbages under treatment T15 and T30 increased by 43.32% and 27.82%, respectively（P ＜ 0.05）, both reaching the significant level. Compared with treatment CF, the yield of flowering Chinese cabbages of treatment RF decreased by 25.93%（P ＞ 0.05）, and the difference was not significant. There was no significant difference in the contents of vitamin C, soluble sugar and nitrate nitrogen in flowering Chinese cabbages at harvest stage under different treatments.【Conclusion】The study shows that chemical fertilizer nitrogen substituted by 15% -30% organic nitrogen is feasible practically in the production of flowering Chinese cabbages. |
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