| Autor: |
Portz, G., Gnyp, M. L., Jasper, J. |
| Zdroj: |
Advances in Animal Biosciences; July 2017, Vol. 8 Issue: 2 p792-795, 4p |
| Abstrakt: |
This study aims to evaluate actual biomass and N-uptake estimates with the Yara N-Sensor in intensively managed grass swards across several trial sites in Europe. The dataset was split by location into an independent calibration data (UK and Finland) and a validation data (Germany) for the first two cuts. Yara N-Sensor readings were better correlated with N-uptake (R2=0.71) than actual biomass (R2=0.53) for the 1stcut. At the 2ndcut, the R2values for both parameters were higher (0.80 and 0.56). A cross-validation with a German grass trial indicated the potential for predicting N-uptake (R2>0.8). It can be concluded that the technology has the potential to guide management decisions and variable rate nitrogen application on European grass swards. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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