The effect of forecrop on the emergencies and healthiness of soybean
2000
Pieta, D. | Pastucha, A. | Patkowska, E. (Agricultural University, Lublin (Poland). Dept. of Phytopathology)
The choice of an adequate plant as forecrop or aftercrop can have a significant influence on healthiness and yielding of the main plant. In the presented studies soybean of Polan cv. was the main plant cultivated in the soil with spring wheat, winter wheat and potato as forecrop whereas monoculture of soybean was a control. The influence of particular plants cultivated before soybean was varying. The best emergencies with the best healthiness were noticed in the combination of soybean cultivation with winter wheat as forecrop. In the control combination only 40 of the sown seeds grew into seedlings and they were all characterized by large, visible necrotic spots on the roots and stem base. As a result of laboratory microbiological analysis it was found out that 1 g of dry weight of soil taken form the soil cultivated with winter wheat as a forecrop contained the greatest number of bacteria colonies and the smallest one of fungi colonies. The smallest number of bacteria colonies and the greatest one of fungi colonies were obtained from 1 g of dry weight of soil of soybean cultivated in monoculture.
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