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Fodder Productivity and Growth Persistency of Three Local Cassava Varieties

  • Tung, C.M. (Department of Animal Science, Universiti Putra Malaysia) ;
  • Liang, J.B. (Department of Animal Science, Universiti Putra Malaysia) ;
  • Tan, S.L. (Food & Industrial Crops Research Centre, MARDI) ;
  • Ong, H.K. (Strategic, Environment and Natural Resources Research Centre, MARDI) ;
  • Jelan, Z.A. (Department of Animal Science, Universiti Putra Malaysia)
  • Received : 2001.01.20
  • Accepted : 2001.04.27
  • Published : 2001.09.01

Abstract

Three cassava varieties, namely MM 92 (MM), Black Twig (BT) and Local (LC), were arranged in a randomized complete block design to evaluate their dry fodder and crude protein (CP) productivity as well as growth persistency. Cassava plants grown in small plots of $5m{\times}10m$ at a planting distance of $25cm{\times}25cm$ were harvested every 6 weeks starting from 3 months after planting. Dry fodder yields of MM, BT and LC over the 8 harvests were 8.55, 8.01 and 6.15 t/ha, respectively. All varieties produced more leaves than stems with average leaf:stem ratios of 5, 5.9 and 4.8 for MM, BT and LC, respectively. In terms of CP production, MM was the highest yielder (272 kg/ha/harvest), followed by BT and LC (238 and 184 kg/ha/harvest, respectively). The total accumulative CP amounts over the 8 harvests were 2179, 1903 and 1474 kg/ha for MM, BT and LC, respectively. The mortality rates were 9.91, 14.01 and 13.98% for MM, BT and LC, respectively. Phosphorus content was more stable than potassium content during defoliation. MM, BT and LC had whole plant phosphorus contents of 0.41, 0.41 and 0.39%, respectively; whole plant potassium contents were 1.25, 1.38 and 1.20%.

Keywords

Cassava Varieties;Fodder Productivity;Crude Protein Production;Mortality Rate;Phosphorus and Potassium Contents