Effect of N and K fertilizers on yield and quality of greenhouse vegetable crops

文献类型： 外文期刊

第一作者： Liu Zhao-Hui

作者： Liu Zhao-Hui;Jiang Li-Hua;Zhang Wen-Jun;Zhang Yu-Lan;Zheng Dong-Feng;Li Xiao-Lin;Hardter, R.

作者机构：

关键词： K fertilizer;N fertilizer;protected cultivation;vegetable quality;vegetable yield

期刊名称：PEDOSPHERE （ 影响因子：3.911； 五年影响因子：4.814 ）

ISSN： 1002-0160

年卷期： 2008 年 18 卷 4 期

页码：

收录情况： SCI

摘要： The application of large amounts of fertilizers, a conventional practice in northern China for the production of vegetable crops, generally leads to substantial accumulation of soil nutrients within a relatively short period of time. A fixed field experiment was designed to study the effects of nitrogen (N) and potassium (K) fertilizers applied to optimize the yield and quality of typical vegetable crops. Application of N and K fertilizers significantly increased the yields of kidney bean. The largest yields were obtained in the first and second years after application of 1500 kg N and 300 kg K(2)O ha(-1). In the third year, however, there was a general decline in yields. Maximum yields occurred when intermediate rates of N and K (750 kg N and 300 kg K(2)O ha(-1)) were applied. However, no significant differences were observed in the concentrations of vitamin C (VC) in kidney bean among different years and various rates of fertilizer treatments. Yields of tomato grown in rotation after kidney bean showed significant responses to the application of N and K in the first year. In the second year, the yields of tomato were much lower. This suggested that the application of N fertilizer did not have any effect upon tomato yield, whereas application of K fertilizer did increase the yield. Application of K fertilizer was often associated with increased sugar concentrations.

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