绿色食品永顺莓茶栽培技术规程

本文从产地环境、茶园建设、品种选择、土肥管理、育苗栽培、田间管理、病虫害防治、采收加工和质量安全等方面总结出了绿色食品永顺莓茶栽培技术规程,为促进永顺莓茶的规范化与标准化生产提供理论与生产依据。莓茶是用葡萄科藤本植物显齿蛇葡萄(Ampelopsis grossedentata)的藤条加工制作而成的饮品[1]。永顺莓茶中富含黄酮类化合物,是目前自然界中发现含黄酮最高的植物,对人体健康具有特殊的保健价值。

生物炭对镉铅污染土壤中金银花生理特性及镉铅积累的影响

采用盆栽试验,研究了镉铅污染土壤中添加生物炭对金银花生理特性及其镉铅积累的影响。结果表明:添加2%~16%的生物炭处理可显著增加金银花的净光合速率、叶绿素含量和根系活力,明显降低其SOD活性;添加6%~16%的生物炭时金银花根部与茎部的镉与铅的含量均显著下降;添加2%~16%的生物炭时金银花叶部与花中的镉与铅的含量均显著下降。添加8%以上的生物炭能使金银花花中的镉与铅的含量降低到安全范围。

Effects of Biochar on Physiological Characteristics of Lonicera Japonica and Accumulation of Cd and Pb in Cd and Pb Contaminated Soil

A pot experiment was conducted to study the effects of biochar on physiological characteristics and accumulation of Cd and Pb of Lonicera japonica in Cd and Pb contaminated soil.The results showed that adding 2%~16%biochar could significantly increase the net photosynthetic rate,chlorophyll content and root activity of Lonicera japonica,and significantly reduce its SOD activity.When 6%~16%biochar was added,the contents of Cd and Pb in roots and stems of Lonicera japonica decreased significantly;when 2%~16%biochar was added,the contents of Cd and Pb in the leaves and flowers of Lonicera japonica decreased significantly.Adding more than 8%biochar can reduce the content of Cd and Pb in Lonicera japonica to a safe range level.

3种花卉单种或混种对后茬显齿蛇葡萄生长及其重金属含量的影响

以猪屎豆(Crotalaria mucronata)、紫茉莉(Mirabilis jalapa)及青葙(Celosia argentea)这3种花卉为研究对象,在重金属中度污染耕地开展田间试验,研究3种花卉植物单种或混种对后茬作物显齿蛇葡萄(Ampelopsis grossedentata)生长和吸收重金属的影响,探索显齿蛇葡萄在重金属中度污染耕地上安全栽培的可行性。结果表明:猪屎豆、紫茉莉与青葙两两间种和三者混种使土壤铅、镉、铜和镍的DTPA提取态含量显著下降;猪屎豆、紫茉莉与青葙三者混种使后茬作物显齿蛇葡萄的根、茎和叶的生物量显著增加;紫茉莉分别与猪屎豆、青葙间种和三者混种使后茬显齿蛇葡萄的铅和镉含量显著下降,其叶中铅和镉含量均低于国家限量标准;猪屎豆、紫茉莉和青葙两两间种和三者混种使后茬显齿蛇葡萄的镍含量显著下降。鉴于轮种对显齿蛇葡萄的生物量与吸收重金属的影响,建议将猪屎豆、紫茉莉和青葙三者混种模式作为阻控后茬显齿蛇葡萄从污染耕地吸收重金属的优势组合模式。