Estimation of grassland productivity by using climate parameters in the French Piedmonts Pyrenean Mountains
文献类型： 会议论文
第一作者： Protin P.V.
作者： Protin P.V. 1 ; Pommelet A. 2 ; Caperaa P. 3 ;
作者机构： 1.Arvalis-Institut du Vegetal, Station Experimental de La Jailliere, 44 370 La Chapelle St Sauveur, France
2.Agrocampus Ouest, Centre d 'Angers, Institut National d'Horticulture et du Paysage, 2 rue Andre Le Notre, 49 045 Angers, France
3.Chambre d Agriculture des Hautes-Pyrenees, 22 place Foirail, 65 000 Tarbes, France
关键词： meadows;production;modelling;Pyrenean;mountain
会议名称： General Meeting of the European Grassland Federation
主办单位：
页码： 187-189
摘要： Meadows were studied in 2008 and 2009 in 'Pyrenees-Atlantiques' and 'Hautes-Pyrenees', French Piedmonts Pyrenean Mountains, to elaborate models to predict grassland yield. These statistical models use linear regression linked yield with different prediction parameters. The model of first production cycle, without fertilization, links yield to sums of temperature accumulated from February 1st. The studied grasslands have very different production potentials without fertilization, so other parameters are tested to improve predictions. The index of nitrogen nutrition (INN) is the most pertinent variable. Two models are constructed according to grasslands INN: low or high. Nitrogen fertilization increases the growth rate if the nutrition status of grassland is not optimum (low INN) but has no effect otherwise. These models are included in a computer tool to improve predictions of grass yields and optimize the grassland management in the French 'Piedmonts' Pyrenean Mountain.
分类号： S812-532
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