Morphological changes associated with forage quality in temperate pastures fertilized with nitrogen in autumn
In the humid temperate region of South America, low temperatures of autumn and winter limits grasses growth (Gastal et al., 1992) and the rate of soil organic nitrogen mineralization.In consequence, strategic nitrogen application at this time is an effective tool to reduce the seasonal forage deficit.Growth, morphology, anatomy and nutrient content are related in forage plants (Lin et al., 2001).Nitrogen effects on growth dynamics and its short‐term impact on the sward structure and forage digestibility, change in agreement to species composition, evaluation dates (Duru and Ducrocq, 2002 ) and rest defoliation periods considered.The aim of this study was to examine the modifications of some fractions of the herbage mass related to forage quality of annual and perennial grasses, occurring in the short term as a consequence of 50 kgN/ha applied in autumn.
orchardgrass bromegrass lamina mass lamina/sheath ratio
G.Acosta A.Ayala Toralesy Gatti,M.L
Ftad.de Agronomía,Universidad de Bs.As.,Cátedra de Forrajicultura,Av.San Martun 4453,1417 DSE,Cdad.Autónoma de Bs.As.,Rep.Argentina.
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）