| Environmental Science & Engineering |
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| Yield and quality responses of citrus (Citrus reticulate) and tea (Podocarpus fleuryi Hickel.) to compound fertilizers |
| WANG Rui, SHI Xue-gen, WEI You-zhang, YANG Xiao-e, UOTI Juhani |
| Ministry of Education Key Lab of Environment Remediation and Ecosystem Health, School of Natural Resources and Environment Sciences, Zhejiang University, Hangzhou 310029, China; Zhejiang Citrus Institute, Huangyan 318020, China; Kemira Global Agric. Development Center, Helsinki 33000101, Finland |
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Abstract Experiments were carried out with citrus (Citrus reticulate) and tea (Podocarpus fleuryi Hickel.) to study the effects of compound fertilizers on their yields and quality. In the citrus experiment, application of compound fertilizers increased available P, K and Mg contents in soil but decreased alkali-hydrolyzable N contents in soil and N, P and K contents in leaves. In the tea experiment, application of compound fertilizers increased available P, K and Mg contents in soil and N, P, K and Mg contents in leaves but decreased alkali-hydrolyzable N in soil compared with the urea treatment. Application of compound fertilizers could improve the quality of citrus and tea, increase their yields and enhance their economical profits significantly. Compared with the control, application of compound fertilizers increased citrus yields by 6.31, 12.94 and 17.69 t/ha, and those of tea by 0.51, 0.86 and 1.30 t/ha, respectively. Correspondingly, profits were increased by 21.4% to 61.1% for citrus and by 10.0% to 15.7% for tea. Optimal rates of compound fertilizers were recommended for both crops.
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Received: 15 December 2005
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