Influence of soil covered cultivation on shoot quality of Phyllostachys prominens.

To enhance the shoot quality and economic profit, appearance quality, content of nutrient, flavour substance and amino acid in Phyllostachos promineos shoot from soil covered bamboo cultivation stand (one-year soil covered stand, two-year soil covered stand and non-covered stand) were investigated, and effects of soil covered cultivation on shoot quality and palatability were also analyzed. The results showed that compared to non-covered stand, individual weight increased by 107.58% for one-year soil covered stand and 165.73% for two-year soil covered stand, while edible parts ratios increased by 8.77% for one-year soil covered stand and 13.63% for two-year soil covered stand. Further more, there was significant difference among different soil-covered stand on individuai weight and edible parts ratios of P. promineos shoot. Shoot length of soil covered stand was higher than that of non-covered stand, and there was no difference on shoot length between one-year soil covered stand and two-year soil covered stand. No difference on shoot diameter existed between one-year soil covered stand and non-covered stand, but those all was lower than shoot diameter of two-year soil covered stand. Compared to non-covered stand, content of protein, tannin, oxalic acid, total acid, cellulose. lignin and amino acid of P. prominens shoot in soil covered stand decreased apparently overall. while soluble sugar. fat and ratio of sugar to acid of P. prominens shoot form soil covered stand increased obviously. Proportion of delicious. sweet and aromatic amino acid increased, and bitter amino acid proportion of P. prominens shoot in soil covered stand decreased. All results indicated that shoot appearance quality of soil covered stand enhanced obviously. and fragrance and sweetness increased obviously. while acid and astringent taste of P. prominens shoot form soil covered stand decreased evidently. shoot quality and palatability enhanced greatly, and the effects on shoot quality and palatability of two-year soil coverage were more evident and beneficial. [ABSTRACT FROM AUTHOR]