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A. C. Mgbeahuruike P. Nørgaard T. Eriksson M. Nordqvist 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2016,66(1):8-16
Effects of grass–clover silage (GCS) alone or combined with whole-crop cereal silage, maize silage (MS) or ensiled pressed sugar beet pulp (EPSB) on faecal characteristics and performance of early-lactation dairy cows were studied in 26 herds. Data were analysed with herd as the experimental unit and correlation coefficients among the variables were estimated. Feeding MS combined with GCS resulted in faeces of a firmer consistency (P?.05), containing more undigested fibre compared to feeding GCS alone or with EPSB (P?.05). There was a strong positive correlation between the number of grains and starch concentration in faeces (r?=?0.83, P?.001). Increasing forage dry matter (DM) intake decreased faecal DM concentration (r?=??0.54, P?.01) but seems to result in cleaner cows, whereas increasing DM intake of concentrate increased faecal DM concentration (r?=?0.63, P?.01) but might result in dirtier cows. 相似文献
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为了探明密度和氮、磷、钾肥对德新油18产量的影响,采用正交试验研究了油菜新品种德新油18不同种植密度和氮、磷、钾肥的效应。结果表明:施尿素12 kg/667 m2比4 kg/667 m2的处理增产17.4 kg/667 m2,施用高氮肥处理的产量高于低氮肥,磷肥和钾肥对产量的影响不大;主花序长度随密度的增加而缩短,有效分枝高度随密度的增加而升高,一次分枝数、二次分枝数、单株有效角果数、角粒数和单株理论产量均随密度增加而减少,千粒重变化不大;德新油18油菜新品种在试验过程中有一定菌核病发生,但不同处理间的差异不明显。 相似文献
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