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当前位置: 首页 > 文章 > Effect of N and K fertilizers on yield and quality of greenhouse vegetable crops 土壤圈(英文版) 2008,18 (4)
Position: Home > Articles > Effect of N and K fertilizers on yield and quality of greenhouse vegetable crops Pedosphere 2008,18 (4)

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

作  者：
Zhaohui Liu;Lihua Jiang;Xin Li;R. Härdter;Wenjun Zhang;Yulan Zhang;Dong Zhen
单  位：
Soil and Fertilizer Institute, Shandong Academy of Agricultural Sciences, Jinan 250100 (China);Soil and Fertilizer Institute, Shandong Academy of Agricultural Sciences, Jinan 250100 (China;China Agricultural University, College of Agricultural Resources and Environmental Sciences, Beijing 100094 (China)
关键词：
fertilizers;and k;application;the application;kidney bean;the yiel
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 K2O 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 K2O 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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