Effects of tannic acid on active aluminum species distribution in different pH tea soils in Yunnan and Jiangxi tea gardens were studied by field observation and laboratory analysis.There were 4 species of active alumi...Effects of tannic acid on active aluminum species distribution in different pH tea soils in Yunnan and Jiangxi tea gardens were studied by field observation and laboratory analysis.There were 4 species of active aluminum in the tea soil,i.e.,exchangeable aluminum Al3 +,unimer hydroxyl aluminum Al(OH)2 +Al(OH)+2,acid-soluble aluminum Al(OH)03and humic-acid aluminum Al-HA.Experimental results showed that tannic acid at levels 0 ~0.4 mmol/kg and 0 ~ 2.0 mmol/kg,with the rising of soil pH value,the content of exchangeable aluminum decreased significantly,hydroxyl aluminum,acid-soluble aluminum and humic-acid aluminum were increased gently.When the concentration of tannic acid increased to above 2.0 mmol/kg,the inhibition of higher concentration of tannic acid on content of active aluminum was strengthened with the rising of soil pH value and variation law of 20 ~ 40 cm soil layer was similar to 0 ~ 20cm soil layer.Generally speaking,the content of active aluminum in upper layer of soil were more than subsoil and total content of active aluminum in Yunnan tea soils were higher than Jiangxi tea soils.The correlation analysis showed that the soil pH were positively correlated with hydroxyl aluminum,humic-acid aluminum,pHBC(r = 0.796,0.960,0.852;p < 0.01,0.01,0.01) in 0 ~ 20cm soil layer.pHBC were significant negative correlated with exchangeable aluminum(r =- 904,p < 0.01),hydroxyl aluminum(r =- 645,p < 0.05),and with humic-acid aluminum have a positive correlation,correlation coefficient was0.795(P < 0.05).Meanwhile,the tannic acid addition concentration were 0 ~ 0.4 mmol/kg soils pH were increased significantly,while samples attains a peak pH value afterwards decrease continuously,the relationship between the pH and the concentration of tannic acids accords with the equation:Y pH=- 0.04C DN+3.82(R2= 0.95,P < 0.01).When the concentration of tannic acid up to about 8.0 ~ 12.0 mmol/kg,soil pH keep unchanged.Therefore,we can clearly draw that effects of tannic acid on active aluminum content of the inflection point is not the same in different region of tea garden soil.Low concentration tannic acid can improve the soil content of various forms of aluminum,but with the increase in the amount of tannic acid,the various forms of aluminum content are inhibited.With the soil pH increased,high concentrations tannic acid on the inhibition of the release of active aluminum increased.pH and tannic acid on the total amount of active aluminum garden soil was mutual weakening effect relationship.展开更多
从系统建设目标、系统结构设计、数据库设计和功能设计等方面,开发基于5G技术的智慧茶园管理监控平台并加以应用。利用信息技术和网络技术,实现茶叶识别、长势预测等功能,系统通过空间数据引擎ArcSDE,以SQL Server 2000作为统一数据库...从系统建设目标、系统结构设计、数据库设计和功能设计等方面,开发基于5G技术的智慧茶园管理监控平台并加以应用。利用信息技术和网络技术,实现茶叶识别、长势预测等功能,系统通过空间数据引擎ArcSDE,以SQL Server 2000作为统一数据库管理工具,在Visual C~(++)6.0环境下开发客户端应用平台。该系统采用嵌入式集成方式,弥补传统目测方法中效率低的不足,能够进行实时监控、及时预警,实现对历史数据的多维度分析和预测,为茶产业发展提供更高效的管理系统。展开更多
文摘Effects of tannic acid on active aluminum species distribution in different pH tea soils in Yunnan and Jiangxi tea gardens were studied by field observation and laboratory analysis.There were 4 species of active aluminum in the tea soil,i.e.,exchangeable aluminum Al3 +,unimer hydroxyl aluminum Al(OH)2 +Al(OH)+2,acid-soluble aluminum Al(OH)03and humic-acid aluminum Al-HA.Experimental results showed that tannic acid at levels 0 ~0.4 mmol/kg and 0 ~ 2.0 mmol/kg,with the rising of soil pH value,the content of exchangeable aluminum decreased significantly,hydroxyl aluminum,acid-soluble aluminum and humic-acid aluminum were increased gently.When the concentration of tannic acid increased to above 2.0 mmol/kg,the inhibition of higher concentration of tannic acid on content of active aluminum was strengthened with the rising of soil pH value and variation law of 20 ~ 40 cm soil layer was similar to 0 ~ 20cm soil layer.Generally speaking,the content of active aluminum in upper layer of soil were more than subsoil and total content of active aluminum in Yunnan tea soils were higher than Jiangxi tea soils.The correlation analysis showed that the soil pH were positively correlated with hydroxyl aluminum,humic-acid aluminum,pHBC(r = 0.796,0.960,0.852;p < 0.01,0.01,0.01) in 0 ~ 20cm soil layer.pHBC were significant negative correlated with exchangeable aluminum(r =- 904,p < 0.01),hydroxyl aluminum(r =- 645,p < 0.05),and with humic-acid aluminum have a positive correlation,correlation coefficient was0.795(P < 0.05).Meanwhile,the tannic acid addition concentration were 0 ~ 0.4 mmol/kg soils pH were increased significantly,while samples attains a peak pH value afterwards decrease continuously,the relationship between the pH and the concentration of tannic acids accords with the equation:Y pH=- 0.04C DN+3.82(R2= 0.95,P < 0.01).When the concentration of tannic acid up to about 8.0 ~ 12.0 mmol/kg,soil pH keep unchanged.Therefore,we can clearly draw that effects of tannic acid on active aluminum content of the inflection point is not the same in different region of tea garden soil.Low concentration tannic acid can improve the soil content of various forms of aluminum,but with the increase in the amount of tannic acid,the various forms of aluminum content are inhibited.With the soil pH increased,high concentrations tannic acid on the inhibition of the release of active aluminum increased.pH and tannic acid on the total amount of active aluminum garden soil was mutual weakening effect relationship.
文摘从系统建设目标、系统结构设计、数据库设计和功能设计等方面,开发基于5G技术的智慧茶园管理监控平台并加以应用。利用信息技术和网络技术,实现茶叶识别、长势预测等功能,系统通过空间数据引擎ArcSDE,以SQL Server 2000作为统一数据库管理工具,在Visual C~(++)6.0环境下开发客户端应用平台。该系统采用嵌入式集成方式,弥补传统目测方法中效率低的不足,能够进行实时监控、及时预警,实现对历史数据的多维度分析和预测,为茶产业发展提供更高效的管理系统。
