Nitrogen Balance in Different Vegetable Crops Growing on Fluvisol in Southern Bulgaria
Keywords:
agricultural system, fertilization, nitrogen balance, environment protectionAbstract
The purpose of this study is to focus on the nitrogen balance and losses in agricultural system. The influence of precipitation, irrigation and fertilizer application on some soil parameters, N-uptake by plant production and N-output by lysimetric water are evaluated in this paper.
The study is carried out оn Fluvisol (Tsalapitsa, Plovdiv region) underе conditions of field experiments with different vegetable crops over the period 2003-2007. The experimental design includes 3 treatments with nitrogen application - N0, N80, N160. The field plots аrе equipped with modification of Ebermayer type оf lysimeters, which collect water from 100 сm depth of soil profile.
According the received data it was observed that compensation between the amounts of N input and output was achieved in two variants (N80, N160) for all crops growing. Reducing the nitrogen input to the amount applied by precipitation аnd irrigation waters is the most ecological-friendly technological decision and very important factor for environment protection.
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