草原施肥对羊草产量和质量的影响

Effect of Fertilizer Application on the Yield and Quality of Herbage (Aneurolepidium chinense)

在吉林省西部白城地区天然和人工草地设置氮磷锌三因素五水平最优回归设计的田间试验 ,研究草原施肥后对羊草产量及质量的影响。结果表明 ,该区草地需要营养元素的顺序是氮和磷 ,其次是锌。对 7个肥料效应回归方程按频率分析法算出的最佳施肥量为N 90kg/hm2 ,P2 O590kg/hm2 和ZnSO4 3 0kg/hm2 ,1kg混合肥可增干草 195kg/hm2 。干草中N含量为 2 1.2～ 2 5g/kg ,P 1.55g/kg ,K11.1g/kg ,Ca 3 .0 g/kg ,Mg 2 .63 g/kg ,Zn 0 .0 3 3 g/kg ,P/Ca为 0 .4～ 0 .6,K/ (Ca +Mg)为 1.97g/kg。

The experiment was conducted as an optimum regression design that study effects of fertilizer application on the nutrient and yield of herbage on natural and man made grassland in Baicheng region, the west of Jilin province. The results showed that the order of the nutrient element needed by herbage was N, P, Zn. The rates of optimum fertilizer calculated by frequency analytical methods to 7 fertilizer effect equations was N 90 kg/hm 2, P 2O 5 90 kg/hm 2 and ZnSO 4 30 kg/hm 2, and the yield increase of herbage was more than 195 kg/hm 2. The content of nutrition in dry herbage was N 21.2～25 g/kg, P 1.55 g/kg, K11.1 g/kg,Ca g/kg, Mg 2.63 g/kg, Zn 0.003 g/kg, and P/Ca and K/(Ca+Mg) was 0.4～0.6 and 1.97 respectively.