Effect of plant spacing and topping frequency on dry leaf yield, protein production, dry root and starch yield of cassava
1989
Vichan Vichukit | Ed Sarobol | Jamlong Jeamjamnanja | Somyos Putthacharoen (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Agronomy)
Cassava foliage is a good source of protein for animal feed as the protein content in cassava top can be as high as 21 percent. The experiment was conducted at Rayong Field Crops Research Center in 1989/90 to determine the effects of cultivars, plant spacings and topping frequency on dry leaf yield, dry root yield, starch yield and protein of cassava. The experiment lay out was in split-split plot desigh consisted of 2 cultivars i.e. Rayong 1 and Rayong 60 in the main plots, 4 plant spacings i.e. 40*40, 40*50, 40*80, 100*100 cm in the sub-plots, and 4 topping frequencies i.e. 6, 5, 4 and 1 times/year in the sub-sub plots. The results indicated that cultivars and plant spacings had no statistical significant effect on top yield and root yield. However, frequency of top cutting caused different effect of foliage and root yield. The highest dry leaf foliage and protein production was obtained when the cassava top was cutting 4 times/year while the highest dry root yield and starch yield were obtained when cassava top was cut only once at harvesting time.
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