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《Acta Agrestia Sinica》 2005-02
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Influence of Mowing Period and Processing Method on the Feeding Value of Caragana korshinskii

LIU Qiang~1, DONG Kuan-hu~2, LIU Ming-xiang~2, WANG Cong~1(1.College of Animal Science and Technology, Shanxi Agricultural University, Taigu, Shanxi Province 030801, China;2. Shanxi Provincial Farming and Reclamation Bureau, Taiyuan, Shanxi Province 030001, China)  
Four oxen of similar age and weight, all with permanent rumen fistula, were chosen and randomly allocated to ten treatments to examine their nutrient digestibility and rumen degradable rate of Caragana korshinskii. Fifty-four healthy holstein heifers with similar weight were chosen and randomly divided into nine treatment groups to test the feeding effect by giving them cut, rubbed, or ground C.korshinskii, which were mowed during the first-year plant's blooming or podding period, or the biennial plant's podding period. The result showed that the rumen degradable rate of dry matter, organic matter, and crude protein of the first-year C.korshinskii mowed during the blooming period was the highest (P0.05), much higher than that of the biennial plant mowed during its blooming period (P(0.05)). The degradability of neutral detergent fiber and acid detergent fiber of C.korshinskii, mowed during the blooming or podding period, were not significantly different, but obviously higher than that of the biennial C.korshinskii mowed during the podding period (P(0.05)). The nutrient digestibility of organic matter of C.korshinskii was superb if the feed was mowed during the plant blooming period and was rubbed into tiny bits (P0.05). Rubbing the mowed podding C.korshinskii plant, or cutting the blooming one into tiny bits gained similar results, though obviously optimal than any other treatments. Nutrient digestibility of crude protein, neutral detergent fiber and acid detergent fiber was the highest with blooming C.korshinskii, treated by rubbing into bits, which gave similar results to mowed podding C.korshinskii with the same treatment. Rubbing the mowed plants into bits was notably the optimaltreatment.The dry matter intake and diet per kilogram metabolic weight were considerably higher with C.korshinskii mowed during the podding period,and treated by grinding which markedhigh intake.The podding C. korshinskii treated by rubbing boasts high rate of intake and average daily weight of animal(P0.05).The average daily kilogram weight gain spends only smalla mount of concentrate and costs very inexpensively.
【Fund】: 山西省科技攻关项目(010006)资助
【CateGory Index】: S816
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