摘要
氮肥是影响牛鞭草产量的重要因素。为了经济合理施肥,对牛鞭草的吸氮规律进行了研究。结果表明,产量与施氮量之间呈二次曲线方程。Y_(干草)=564.3974+52.0808x-0.8352x2(f=290.0948)。其总吸氮量与施氮量呈极显著正相关。Y=6.9229+0.5394x,r=0.9740。氮素利用率与施氮量呈极显著负相关。Y_R=97.4464-1.4707x,r=-0.9836。通过计算分析,认为牛鞭草最佳施氮量为每亩25-30公斤。其干草产量,最高达1736.7公斤。氮肥应在牛鞭草生育前期施用。
Nitrogen fertilizer is an important factor affecting the yield of Hemarthria compressa. The Pattern of nitrogen Utilization by the grass was studied in order to fertilize economically and rationally. The result shows that the relationship between the hay yield and the nitrogen applied can be described as : Y_(hay)=564.3974+52.0808x-0.8352x2 (F=290.0948); The total nitrogen absorbed and applied is Correlated positively and extremely significantly, Y=6.9229+0.5394, r=0.9740; The nitrogen Utilization ratio and the amount ob nutrogen fertilizer applied is correlated negatively and prominently, Y_R=97.4464-1.4707X, r=-0.9837 The results suqqested that the quantity of nitrogen applied is 25—30kg. per mu, which can yield 1376.7kg/nu dry matter Nitrogon fertilixer should be applied at the early stage of Hemarthrie comppessa growth
出处
《草业科学》
CAS
CSCD
北大核心
1991年第3期26-30,共5页
Pratacultural Science
关键词
扁穗牛鞭草
吸收
氮
规律
Hemarthria csmpressa
nitrogen ferfilixer of
