Effects of Nitrogen and Potassium Rates on Yield of Summer Chinese Cabbage

IPNI-2010-CHN-CQ17

Chinese cabbage is one of the most widely grown leafy vegetables in China, a crop which can be grown year round. Nutrient management studies conducted in the past on Chinese cabbage were mostly targeted toward winter varieties. This project was started to determine the optimal K rates for some summer varieties of Chinese cabbage in Chongqing. Read more


Year of initiation:2010
Year of completion:2013

Interpretive Summary

Chinese cabbage is one of the most widely grown leafy vegetables in China, a crop which can be grown year round. Nutrient management studies conducted in the past on Chinese cabbage were mostly targeted toward winter varieties. This project was started to determine the optimal K rates for some summer varieties of Chinese cabbage in Chongqing.

Potassium chloride (KCl) and potassium sulfate (K2SO4) are the two commonly used K fertilizers for vegetable production in China. However, vegetable growers fear that KCl may affect vegetable yield and quality as many field vegetables are sensitive to chloride (Cl-), especially in early growth stages. We conducted field experiments in Jiulongpo District of Chongqing to verify the effects of KCl and K2SO4 on yields and quality of lettuce and Chinese cabbage.

Traditionally, P and K fertilizers are used as basal application to most crops, if not all. It is unclear what extra benefit would accrue when these two fertilizer are used in split applications at different growth stages of a crop. Thus, this study aimed to investigate the effect of split application of P and K along with N fertilizers on yield and quality of Chinese cabbage in Chongqing, China in 2011.

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Project Leader

Zhengyin Wang, Southwest University


Project Cooperators

None


IPNI Staff

Shihua Tu


Location

Asia \ Eastern Asia \ CHN \ Chongqing \ Beibei


Topics

4r source, 4r time, nutrient management

cabbage

Nitrogen (N), Potassium (K)