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Effect of Application Ratio of Potassium over Nitrogen on Litchi Fruit Yield, Quality, and Storability

文献类型: 外文期刊

作者: Yang, Baomei 1 ; Li, Guoliang 1 ; Yang, Shaohai 1 ; He, Zhaohuan 1 ; Zhou, Changmin 1 ; Yao, Lixian 2 ;

作者机构: 1.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou 510640, Guangdong, Peoples R China

2.South China Agr Univ, Coll Resources & Environm Sci, Guangzhou 510640, Guangdong, Peoples R China

关键词: Litchi;K2O:N ratio;yield;quality;storability

期刊名称:HORTSCIENCE ( 影响因子:1.455; 五年影响因子:1.617 )

ISSN:

年卷期:

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收录情况: SCI

摘要: Soils of litchi orchards in China are commonly deficient in nitrogen and potassium. The cultivar Feizixiao litchis planted in a typical acidic upland orchard, which is low in nitrogen and potassium, were used as a subject in field experiments with different ratios of potassium to nitrogen (K2O:N = 0.6, 0.8, 1.0, 1.2, and 1.4). Field experiments were conducted from 2009 to 2012. The effects of K2O:N ratio on the yield, quality, and storability of litchi were investigated and discussed. Results indicated that with the increase of K2O:N ratio, fruit yield initially increased and then decreased, and litchi had the highest yield when K2O:N was 1.2. When K and N fertilizers were applied at the ratio of 1.2, litchi had a better fruit quality with higher vitamin C content, soluble sugar, and soluble solid. With the increase of K2O:N ratio, healthy fruit rate initially increased and then decreased. This rate reached the maximum value when K2O:N was 1.2. Meanwhile, fruit-rotting rate, peel-browning index, cell membrane permeability, and peroxidase (POD) activity decreased at first and then increased and reached the minimum value when the K2O:N ratio was 1.2. Therefore, litchi fruit had the highest yield, better quality, and best storage property when K2O:N was 1.2. Thus, this ratio is recommended for the main litchi production areas in China.

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