RESUMEN
A split-plot experiment was conducted to study the optimum planting density of Nuomi yam in directional groove shallow cultivation. Nuomi yam was the main local cultivar of Dioscorea. The study of this paper may help to give valuable instructions of local production. Three different planting densities and shallow groove diameter were designed in the experiment. The results showed that the fresh weight of aerial part per plant, yield and planting benefit of Nuomi yam tuber were the highest when the planting density was 12 000 plants/hm~2 and the diameter of shallow growth groove was 11.0 cm, while they were the lowest when the planting density was 22 500 plants/hm~2 and the diameter of shallow growth groove was 7.5 cm. Along with the increase of planting density, the fresh weight of aerial part, tuber, fresh yield, benefit and commercial tuber rate of Nuomi yam also decreased. The commercial tuber rate of Nuomi yam of 11.0 cm diameter in shallow growing pot was the highest, while it was the lowest with no shallow growing pot. On the contrary, the content of amylopectin and mucin was the highest when there was no shallow groove, and was the lowest when the diameter of shallow groove was 7.5 cm, although there was no significant difference between the two treatments. Therefore, Nuomi yam with the directional cultivation combination of planting density of 12 000 plants/hm~2 and shallow groove diameter of 11.0 cm showed high yield, good appearance quality, high planting benefit and no obvious adverse effect on internal quality.
Asunto(s)
DioscoreaRESUMEN
A water-soluble oligosaccharide was isolated from the water extract of soybean, which is widely grown worldwide due to its nutritional benefits of a full range of amino acids and a high protein content. In this study, we analysed chemical composition of soybean oligosaccharides (SBOS) using high performance liquid chromatography (HPLC). The results obtained were compared with the following sugar standards: mannose, galactose, xylose, arabinose, fucose and glucose. Results showed that SBOS was composed of galactose (65.3%), mannose (15.6%), fructose (7.8%) and glucose (8.7%). The pharmacological action of SBOS has been studied in hyperlipidemic rats fed high-fat diet. In hyperlipidemic rats, feeding with SBOS (150 and 300 mg/kg b.w.) exerted a pharmacological effect as assessed by reversal of plasma levels of lactic acid, nitric oxide (NO), vascular endothelial growth factor (VEGF) levels, and heart Na+-K+-ATPase, Ca2+-ATPase and Mg2+-ATPase activities. These results indicated that SBOS may have beneficial effects on the therapy of some heart diseases, such as coronary artery diseases.