Co-Authors:
Yang, L., Key Laboratory of Horticulture in Liaoning, Shenyang Agricultural University, Shenyang, Liaoning 110161, China, College of Land Recourses and Environmental Science, Shenyang Agricultural University, Shenyang, Liaoning 110161, China
Li, T., Key Laboratory of Horticulture in Liaoning, Shenyang Agricultural University, Shenyang, Liaoning 110161, China
Li, F., Agricultural College, Guangxi University, Nanning, Guangxi 530005, China
Lemcoff, J.H., Institute of Soil, Water and Environmental Sciences, Volcani Center, Bet Dagan, 50250, Israel
Cohen, S., Institute of Soil, Water and Environmental Sciences, Volcani Center, Bet Dagan, 50250, Israel
Abstract:
Different fertilizers may affect soil enzymatic activity and soil fertility dynamics. These effects were investigated in a field experiment with cucumber (Cucumis sativus L.) and the relationship with yield and soil nutrient availability was assessed. Soil enzymatic activity, measured as phosphatase, catalase, invertase and urease activities, decreased in the early growth stages of cucumber, but increased in the late ones, when plant were supplied with partially decomposed horse manure. Chemical N fertilizer inhibited soil enzymatic activity but P and K fertilizers enhanced it. Activity of different soil enzymes was positively correlated with soil NH4 +-N and available P concentration, but negatively correlated with leaf N and P concentration. Cucumber yield was also positively correlated with the soil enzymatic activity. Our results demonstrate that soil enzymatic activity acted as a useful indicator of soil fertility dynamics. © 2008.
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