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- Title
2种钾肥配施方法对马铃薯块茎氮磷钾积累量、 产量及品质的影响.
- Authors
许世豪; 赵春波; 皇甫丽云; 范欣桐; 陈姗姗; 韩忠才; 韩玉珠
- Abstract
[Objective] This study explored the effects of combined application of two kinds of potassium fertilizers on the accumulation of nitrogen, phosphorus and potassium in potato tubers as well as yield and quality of potato to provide reference for rational application of potassium chloride for yield and quality improvements. [Method] Yanshu 4 potato was selected for four fertilization treatments of base fertilizer 1/2 potassium sulfate+topdressing 1/2 potassium sulfate (K1), base fertilizer 1/2 potassium sulfate + topdressing 1/2 potassium chloride (K2), base fertilizer 1/2 potassium chloride+topdressing 1/2 potassium sulfate (K3) and base fertilizer 1/4 potassium sulfate-1/4 potassium chloride+topdressing 1/4 potassium sulfate-1/4 potassium chloride (K4). The accumulation of nitrogen, phosphorus and potassium, yield and related quality indexes (starch, soluble sugar, vitamin C, soluble protein and nitrate contents) of potato tubers in different fertilization treatments were determined. On this basis, the comprehensive effects of different fertilization treatments on potato yield and quality were evaluated by principal component analysis. [Result] Compared with the single application of potassium sulfate treatment (K1), the combined application of potassium chloride and potassium sulfate increased the accumulation of nitrogen, phosphorus and potassium in potato tubers. Among the four treatments, K4 had the highest potato yield of 49 031 kg/hm², significantly higher than other treatments. Compared with K1, the starch contents of potato tubers in K2 and K4 increased significantly, while that in K3 decreased significantly. The contents of soluble sugar and vitamin C in potato tubers in K2, K3 and K4 increased significantly, while the contents of soluble protein and nitrate decreased significantly. The results of principal component analysis showed that the comprehensive scores of the treatments were in the order of K4>K2>K3>K1. [Conclusion] The effects of potassium sulfate and potassium chloride on the accumulation of nitrogen, phosphorus and potassium in potato tubers and the yield and quality of potato were significantly different. The K4 treatment of applying 1/4 potassium sulfate and 1/4 potassium chloride as base fertilizer and 1/4 potassium sulfate and 1/4 potassium chloride as topdressing was the best.
- Subjects
POTASSIUM sulfate; POTATOES; POTASSIUM chloride; POTASSIUM fertilizers; PRINCIPAL components analysis; POTATO quality; VITAMIN C; POTATO growing
- Publication
Journal of Northwest A & F University - Natural Science Edition, 2023, Vol 51, Issue 9, p29
- ISSN
1671-9387
- Publication type
Article
- DOI
10.13207/j.cnki.jnwafu.2023.09.004