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‘金美’是从云南野外美味猕猴桃资源中选育出的绿肉高糖新品种。果实为卵形，果面黄褐色硬毛，果形整齐；平均单果质量60 ~ 80 g。果肉绿色或黄绿色，质嫩多汁，风味浓甜。软熟果实含可溶性固形物24.1%，可溶性总糖16.2%，总酸1.25%，维生素C 1 180 mg • kg-1，钾 342 mg • kg-1，钙84.2 mg • kg-1。在武汉地区8月果实成熟，此时果实采后7 d开始软熟，1 ~ 2 ℃低温和95%相对湿度下可存放100 ~ 120 d。盛果期产量22 t • hm-2。 相似文献
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There is scope of increasing the nitrogen (N) efficiency of grazing cattle through manipulation of the energy and N concentrations in the herbage ingested. Because of asymmetric grazing by cattle between individual plant parts, it has not yet been established how this translates into the concentrations of N and water‐soluble carbohydrates (WSC) in the herbage ingested. A model is described with the objective of assessing the efficacy of individual tools in grassland management in manipulating the WSC and N concentrations of the herbage ingested by cattle under strip‐grazing management throughout the growing season. The model was calibrated and independently evaluated for early (April), mid‐ (June, regrowth phase) and late (September) parts of the growing season. There was a high correlation between predicted and observed WSC concentrations in the ingested herbage (R2 = 0·78, P < 0·001). The correlation between predicted and observed neutral‐detergent fibre (NDF) concentrations in the ingested herbage was lower (R2 = 0·49, P < 0·05) with a small absolute bias. Differences in the N concentration between laminae and sheaths, and between clean patches and fouled patches, were adequately simulated and it was concluded that the model could be used to assess the efficacy of grassland management tools for manipulating the WSC and N concentrations in the ingested herbage. Model application showed that reduced rates of application of N fertilizer and longer rotation lengths were effective tools for manipulating herbage quality in early and mid‐season. During the later part of the growing season, the large proportion of area affected by dung and urine reduced the effect of application rate of N fertilizer on herbage quality. In contrast, relative differences between high‐sugar and low‐sugar cultivars of perennial ryegrass were largest during this period. This suggests that high‐sugar cultivars may be an important tool in increasing N efficiency by cattle when risks of N losses to water bodies are largest. The model output showed that defoliation height affects the chemical composition of the ingested herbage of both the current and the subsequent grazing period. 相似文献
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在黄土高原引种3种高糖黑麦草(Lolium perenne),采用模拟轮牧(SG)和全株收获干草(MH)两种利用方式,评价饲草生产性能。SG的3种高糖黑麦草品种的粗蛋白含量、粗脂肪含量和粗灰分的含量明显高于MH,SG的粗纤维含量和可溶性糖含量显著低于MH(P0.05)。SG显著增加粗蛋白、粗脂肪、粗灰分和水分利用效率(P0.05),提高‘明星’和‘优质’的总能产量。高糖黑麦草品种"明星"的产草量、水分利用效率和各种养分的产量极显著高于其他2个高糖黑麦草品种‘神奇’和‘阿旺’(P0.01),其他高糖黑麦草品种与对照品种差异不显著(P0.05)。SG提高高糖黑麦草的饲用价值,且‘明星’的饲用价值高于其他品种。 相似文献
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以离子注入诱变技术获得的甜菜高糖突变体S10和未做诱变处理的F104及F2代85株单株为研究材料,提取DNA并进行RAPD分析,选取800条RAPD随机引物对S10和F104进行扩增,结果表明,S10和F104之间在DNA水平上存在差异.从800条随机引物中筛选到19条引物在S10和F104中存在较稳定差异,存在差异的引物占所用引物数的2.3;,该研究利用S10和F104做亲本构建分子标记作图群体,进而为定位高糖性状基因或QTL奠定了基础. 相似文献
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