Gute N-Effizienz auf Luzerner Milchwirtschaftsbetrieben [Schweiz].
1996
Thomet P. | Koller P.
The nitrogen balances of twelve dairy farms in the region of Luzern with intensive grassland management were compared with an average Dutch dairy farm. On average the Swiss dairy farmers used only 500 kg of concentrates per cow and 27 kg of mineral nitrogen fertiliser per hectare and year. Consequently the average nitrogen surplus on the Swiss farms was as low as 109 kg N per ha per year as compared to 486 kg on the Dutch farm. Several reasons for these differences were identified: 1. The fertilising recommendations for intensive grassland are quite different in the two countries; 2. Legumes are very important in Swiss permanent grassland: more than 40 % of the total N input on the Luzern dairy farms resulted from biological nitrogen fixation. It is concluded that the Swiss dairy farming system is more sustainable and less damaging for the environment.
显示更多 [+] 显示较少 [-]